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kevnmcd
12-02-2005, 01:47 PM
Well, since Beer-30 asked in another thread I thought I would start a thread on my project. For some reason I lost a ton of power and compression over this last season so I decided to take it out and tear it down. The motor is a 502 Mag EFI. I am not the most knowledgable on this but I have a buddy that is and he is helping me do it. I was surprised when I found out it was a Gen VI and not a V! Based on the year of the boat and the Mercruiser Serial #, everything pointed to a Gen V and I was going to convert it to a Gen VI. Anyway, here goes.....
How many have pulled your motor with one of these?
http://www.lasvegas***boats.com/iB_html/uploads/post-2-36862-IMG_1808a.jpg
I was expecting to see either a burnt valve or some bad springs but didn't find either.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-37040-IMG_1824a.jpg
Well, maybe a some cracked pistons or bad rings???? Doesn't look like it.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-37074-IMG_1825a.jpg
About this time we were scratching our heads trying to figure out what the problem was. It wasn't until we turned over the block to take the pan off that we found our problem.....I wonder if this is it???
http://www.lasvegas***boats.com/iB_html/uploads/post-2-37106-IMG_1826a.jpg
It seems that when they assembled this motor somehow an extra rod nut was left in the pan. It just took 10 years and the perfect wake at the right time to send this nut up into the cam. It must have gotten stuck in there for a time or something. It tore up a lobe pretty good and busted another lifter, too. Oh well....time for more HP!!!!
I purchased an upgrade kit from Crockett marine engines which should bump the HP up to around 510-520. Block and heads will be going into the shop next week for all the machine work and I should be putting it back together at the end of this month. More to follow.

Infomaniac
12-02-2005, 08:01 PM
Cool stuff man. We routinely pull engines with a fork lift. And occationally dig up some soil with the fork lift. LOL

Shallow Minded
12-04-2005, 08:54 AM
Good thread, keep us posted on the rebuild. Those #'s should be easily attainable. And you weren't messing around with the cherry picker... LOL.

kevnmcd
12-10-2005, 12:57 PM
Couldn't rebuild it without adding a little bling to it.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-48142-IMG_1843a.jpg

Wild Horses
12-11-2005, 08:03 AM
Hey Kevin,
Welcome to the Horsepower club.
I always pull my boat motors with a frontend loader.

kevnmcd
12-11-2005, 04:10 PM
Hey Kevin,
Welcome to the Horsepower club.
Thanks. Probably still not in your range but definately better than before!

Beer-30
12-11-2005, 06:21 PM
You Go, boy!
Hey, the backhoe is just as good as a tow truck. I have always preached that hydraulics do lots of work for us. Atta boy!
I think the Crockett kit will work good for you. I would have done it if I ended up with a Gen V or VI, but I ended up with a VII. I envy you.
Keep it up!

kevnmcd
12-11-2005, 09:43 PM
You Go, boy!
Hey, the backhoe is just as good as a tow truck. I have always preached that hydraulics do lots of work for us. Atta boy!
I think the Crockett kit will work good for you. I would have done it if I ended up with a Gen V or VI, but I ended up with a VII. I envy you.
Keep it up!
Thanks. I will post pics as I go. Should be assembling between xmas and New Years. Here are a few of the parts I have so far.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-64540-P1000498.jpg

Wild Horses
12-12-2005, 01:49 PM
Looks like a good assortment to me.
And have a fun Christmas vacation.

bubbletop409
12-12-2005, 03:07 PM
Are you changing or upgrading your cam and valve train during your rebuild? If so, what are you planning on going with? I have a 26' Eagle with a HP500EFI and will be following your rebuild closely, thanks, Larry.

kevnmcd
12-12-2005, 06:37 PM
Are you changing or upgrading your cam and valve train during your rebuild? If so, what are you planning on going with? I have a 26' Eagle with a HP500EFI and will be following your rebuild closely, thanks, Larry.
Yes, I am. Valves do to 2.25 intake and 1.90 exhaust. The cam also get bumped up, not sure to what as I bought this package (http://www.crockettmarineengines.com/products.html) from Crockett. He claims that this package will net +/- 515 hp out of a stock 502 short block. I am bumping the compression up a little more than the 9.0 that these numbers are based on as well as going to 509 ci. So who knows, I may be in the 530-540 hp range when all said and done. I haven't decided if I am going to dyno it or not yet, so I may never know what the final numbers are.

bubbletop409
12-12-2005, 10:40 PM
So what was the original HP rating on your motor? Thinking about doing a cam swap and ECM reprogram on mine when the heads are do for service. Taking notes, thanks, Larry.

MikeF
12-13-2005, 05:34 AM
Waaaaaay off topic....BT409, post a pic of the BelAir! One of my favorite Chevy's.

Beer-30
12-13-2005, 08:36 AM
So what was the original HP rating on your motor? Thinking about doing a cam swap and ECM reprogram on mine when the heads are do for service. Taking notes, thanks, Larry.
Injected 502s were 415HP.

kevnmcd
12-13-2005, 10:12 AM
Injected 502s were 415HP.
Yep!

Riverjet502
12-13-2005, 03:17 PM
Antique tractors work too!!!
http://img309.imageshack.us/img309/430/picker21aj.jpg (http://imageshack.us)

kevnmcd
12-18-2005, 02:18 PM
Still collecting parts:
Dana Marine exhaust
http://www.lasvegas***boats.com/iB_html/uploads/post-2-02443-IMG_1855a.jpg
Gaskets, roller rockers, fuel lines and cooler, timing chain, etc.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-50173-DSCN0789.JPG
Gibson muffler tips
http://www.lasvegas***boats.com/iB_html/uploads/post-2-53173-IMG_1884a.jpg

bubbletop409
12-18-2005, 04:04 PM
Did that new cam come with a spec and timing card?

kevnmcd
12-19-2005, 08:47 AM
Did that new cam come with a spec and timing card?
Not sure. The parts got shipped right to my buddies house that is helping me build it. I will have to check next week when we start assembling it. If I remember correctly, it was somewhere around 234/234 @ .050.

Beer-30
12-19-2005, 09:00 AM
I would strongly advise against those tips. Those were designed for STOCK 496s and 502s. The larger "bullets" were designed for anything higher, 500HP and such. You will definitely be in the 500HP class, so those are going to choke you, especially with that cam. You might as well leave the stock exhaust, because that about all that can make it out of those tips.
Additionally, If you desire mufflers, I would go with clamp-ons or switchables. I have the clamp ons and have never put them on. I venture to say, that unless one is being stupid and attracting attention to ones self, he or she would not be bothered. I had LE right behind me through the channel, and my open tips are above water - in a swimstep chamber - and they never even looked at me.
My friend has the replacement tips on his 454 mag and hates them. He wishes now that he had done the clamps, so he could hear it open from time to time. I know switchables are technically illegal, but there is letter of the law and spirit of the law. I just don't see any LE official getting hung up about being able to switch on demand.

Beer-30
12-19-2005, 09:19 AM
Just looked at the website and the PowerTips that you have are for 450 HP and down. Bullets are for 450 HP and up.
I'm not trying to take the wind out of your sails, I just don't want to see you put all this effort and money into a nice motor and be dissapointed by cutting exhaust flow by a 1/3.

kevnmcd
12-19-2005, 12:17 PM
Beer-30 - That is something that I didn't realize. I originally purchased the bullet clamp-ons but when I got them, I decided to return them and go with the bolt-on style. When I went down to exchange them they were out of them but had these. I compared the two....length, inside/outside diameter, etc., but the only diffence I saw was the outside diameter. I wonder how much difference there could be in just that dimension? I am sure the bullets will flow better with the bigger diameter, but is it enough to make a diffence on a motor that will only be in the 500-525 HP range?? I am not sure how much of my boating time will be spent at the WOT range and will I miss a mph or two....probably not. Besides, there were almost half the price of the bullets. I will definately keep in mind though. Thanks for looking out for me.

Beer-30
12-19-2005, 11:11 PM
It'll make plenty of difference. I'm dead serious about this, I am not pulling your leg. Gibson did extensive testing on these units and these won't work well for the HP you will be pushing.
We all know that we don't figure on running WOT much, but it sure seems to happen alot.

kevnmcd
12-27-2005, 08:01 PM
All the machine work is done so, did some more work on it this weekend. Block had to be decked a little as one side was .0015 and the other was .0024
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54110-Copy_of_DSCN0791.JPG
Crank is in!
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54163-Copy_of_DSCN0793.JPG
Pistons/Rod are all ready. New Eagle H-beams replaced the stock GM rods....anyone need a set of stockers?
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54191-Copy_of_DSCN0794.JPG
One side done.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54241-Copy_of_DSCN0795.JPG
All ready to put the pan on. Made sure to double check that there were no extra parts in there this time!
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54291-Copy_of_DSCN0798.JPG
Frontal shot!
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54356-Copy_of_DSCN0797.JPG
Heads are on.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54401-Copy_of_DSCN0800.JPG
Not that anyone will ever see how nice my rocker arms look....I will just have to tell them.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54667-Copy_of_DSCN0801.JPG
My new exhaust....Dana Marine!
http://www.lasvegas***boats.com/iB_html/uploads/post-2-54814-Copy_of_DSCN0803.JPG

paradigm shift
12-27-2005, 08:55 PM
Looking real good Kevin. I think you have inspired me to rebuild mine. I have been looking at Tyler's modification for some time now just never stepped up and tried it. Did you ask Tyler about doing any modifications to your intake? Shortening runners or extrude hone to open them up a bit for more flow.

Beer-30
12-27-2005, 11:48 PM
No port work on the heads? Isn't that part of the Crockett recipie

Sun burners
12-28-2005, 08:18 AM
Very Nice!
Keep the shots coming!
Wheres the test run going to be?
Mike,
another 502 owner

kevnmcd
12-28-2005, 09:53 AM
Looking real good Kevin. I think you have inspired me to rebuild mine. I have been looking at Tyler's modification for some time now just never stepped up and tried it. Did you ask Tyler about doing any modifications to your intake? Shortening runners or extrude hone to open them up a bit for more flow.
I didn't talk to him about any of that, but I am sure it would just add more hp and of course more $$$ to the project.

kevnmcd
12-28-2005, 09:55 AM
No port work on the heads? Isn't that part of the Crockett recipie
His recipe (+100 hp) just uses everything as stock except the larger valves. I could have had some port work done if I wanted but the pocket book is running low....maybe on the next rebuild.

kevnmcd
12-28-2005, 09:56 AM
Very Nice!
Keep the shots coming!
Wheres the test run going to be?
Mike,
another 502 owner
Since I am doing all this work with a buddy in Vegas....probably Lake Mead.

XTRM22
12-28-2005, 12:34 PM
Looking real good Kevin. I think you have inspired me to rebuild mine. I have been looking at Tyler's modification for some time now just never stepped up and tried it. Did you ask Tyler about doing any modifications to your intake? Shortening runners or extrude hone to open them up a bit for more flow.
Careful Andy, don't you go messing up Pam's motor! Besides at least now when you 're running the 502 I can keep up.
Chuck

kevnmcd
01-10-2006, 12:14 PM
Latest progress pics.
Roller rockers installed
http://www.lasvegas***boats.com/iB_html/uploads/post-2-69584-Copy_of_P1000514.jpg
Valve covers on
http://www.lasvegas***boats.com/iB_html/uploads/post-2-69677-Copy_of_P1000516.jpg
Front view
http://www.lasvegas***boats.com/iB_html/uploads/post-2-69730-Copy_of_P1000517.jpg
New exhaust installed
http://www.lasvegas***boats.com/iB_html/uploads/post-2-69821-Copy_of_P1000518.jpg
Another view w/exhaust
http://www.lasvegas***boats.com/iB_html/uploads/post-2-70002-Copy_of_P1000519.jpg
Should be ready to fire up as soon as I can get it back in the boat!

Beer-30
01-10-2006, 04:08 PM
Completely out of curiosity, how is the build vs. budget going? I know you must be close to your $5K by now.

kevnmcd
01-10-2006, 07:26 PM
Completely out of curiosity, how is the build vs. budget going? I know you must be close to your $5K by now.
What is a budget? hahahaha
With everything I have purchased so far I am right at about $7k. If I didn't have to buy the exhaust I would have been right on budget, but the exhaust cost me $2k. Still not bad for what I have done. If I hadn't done the bottom end too, I would have been on budget. At least now I won't have to worry about the whole engine for a long time.

Beer-30
01-10-2006, 07:38 PM
Good for you. I though you were going to port the heads in the beginning, and you would have been way over. Should be a great motor. I would suggest (if you haven't already) freshing up / replacing the water pump (block mounted) and the starter. These two items are pretty buried in full dress, so now is the time.

kevnmcd
01-10-2006, 08:58 PM
Good suggestions.......I did the water pump, impellor, and a bunch of other little stuff already. The starter was in good shape so I didn't replace that one. It is the newer high-torque one and comes off fairly easily and is not buried that deep so I figured I could wait on that one.

kevnmcd
01-10-2006, 09:01 PM
All that is left is to put it in the boat and hook everything back up and fire it up. Hopefully, later this month!
http://www.lasvegas***boats.com/iB_html/uploads/post-2-52990-Copy_of_P1000520.jpg
http://www.lasvegas***boats.com/iB_html/uploads/post-2-53233-Copy_of_P1000521.jpg

phebus
01-11-2006, 05:56 PM
That looks great!!!!! Thanks for the thread, I love the tech stuff. Keep us posted on how she runs.
Looking forward to seeeing you and the family this summer.

Beer-30
01-27-2006, 10:12 AM
Well? Does it live?

kevnmcd
01-27-2006, 10:16 PM
Well? Does it live?
Not yet. I will be putting it back in the boat next weekend but don't know if I will get time to water test it. Will definately fire it up though. I will post more pics next week.

38PQ
01-28-2006, 11:23 AM
NIce looking 502!! Im new to this site, just joined today, mainly due to the fact I may have Tyler C do my 502s. Are the exhaust that are on this motor the ones that come with the package or did you upgrage?
Any info that anyone out there could share on the Crokcett 502 upgrade would be most appericated. I live in Michigan so hes fairly close and seems to have a great rep.
Is there anyone who has had this done and put some hours on the motors??
Thanks in advance!!

kevnmcd
01-28-2006, 07:00 PM
38pq - The exhaust that you see in my pics are Dana Marine. Crockett's package comes with Stainless Marine. I wanted something with a little more "bling".
Once I get the motor back in (next weekend) and get a chance to water test it, I can let you know how his upgrade kit is. I don't know of anyone else on this board that has used his kit so far.....at least no one that has said anything.

38PQ
01-28-2006, 07:31 PM
Thanks Kevnmcd, I appericate the info. Did you dyno the motor after you did the upgrade? Can I ask how much money you into on this deal? Any other upgrades other than exhaust?
Thanks again

kevnmcd
01-29-2006, 02:51 PM
Thanks Kevnmcd, I appericate the info. Did you dyno the motor after you did the upgrade? Can I ask how much money you into on this deal? Any other upgrades other than exhaust?
Thanks again
Decided not to dyno it and spend the money on gas instead. Not too concerned on whether I have 525 hp or 523 hp. I am just looking for a good strong running motor, which I believe I will have with this setup. It looks like I will have +/- $7k into it when all said and done. Exhaust was one upgrade and so was Tyler Crockett's kit. Since I was doing the bottom end of the motor, I took the opportunity to use the pistons to up the C/R instead of milling the heads. I should be right around 9.3:1 or so on the C/R.
Good luck on your build. Let me know if you have any questions.

38PQ
01-29-2006, 04:16 PM
Thanks Kevin, Im sure I will have other questions brfore its over!!

kevnmcd
02-06-2006, 09:38 AM
Put the motor back in the boat this past weekend. Here are a few pics.
Ready to go!
http://www.lasvegas***boats.com/iB_html/uploads/post-2-76416-IMG_2160a.jpg
Going in.
http://www.lasvegas***boats.com/iB_html/uploads/post-2-76453-IMG_2164a.jpg
Almost ready to fire.....
http://www.lasvegas***boats.com/iB_html/uploads/post-2-76537-IMG_2170a.jpg
It lives!!!!!
http://www.lasvegas***boats.com/iB_html/uploads/post-2-76573-IMG_2171a.jpg
Fired up and sounds good and healthy! Didn't get a chance to get it on the water but hopefully in the next couple of weeks will get a chance. I will post more on the results after that.

Beer-30
02-06-2006, 11:38 AM
Glad to hear it. Hope it works out to what you wanted.

kevnmcd
02-06-2006, 03:01 PM
Hope it works out to what you wanted.
Me, too! Time will tell.

38PQ
02-06-2006, 03:31 PM
Looks killer!!! Cant wait to hear more!!
Thanks for the update

Sun burners
02-07-2006, 09:25 AM
Very nice!
Did you have to reprogram the computer for the headers?
Mike

Beer-30
02-07-2006, 09:36 AM
Very nice!
Did you have to reprogram the computer for the headers?
Mike
For the headers?
How about for the cam, huge valves, and taller compression - before the headers even came into play.
He will confirm, but I believe he went with the Tyler Crockett ECM recal., or had it done somewhere else? Kev?

Sun burners
02-07-2006, 11:34 AM
What kind of cost is the reprogram?
Just curious
Mike

Beer-30
02-07-2006, 03:14 PM
What kind of cost is the reprogram?
Just curious
Mike
AZ Speed and Marine does it, if you were interested in just the ECU programming:
http://www.azspeed.com/peecuca.html
He may have got an exchange ECU from Tyler Crockett. This is basically what he did on this rebuild:
http://www.crockettmarineengines.com/products.html

kevnmcd
02-07-2006, 04:57 PM
Very nice!
Did you have to reprogram the computer for the headers?
Mike
I had to reprogram the ECU for the whole setup, not just for the headers.

kevnmcd
02-07-2006, 04:58 PM
For the headers?
How about for the cam, huge valves, and taller compression - before the headers even came into play.
He will confirm, but I believe he went with the Tyler Crockett ECM recal., or had it done somewhere else? Kev?
Tyler Crockett reprogrammed mine for me to work with his kit. The price is on his website...about $350, I think.

Beer-30
02-07-2006, 05:12 PM
Have you started pricing outdrives?
LOL.

kevnmcd
02-08-2006, 08:19 AM
Have you started pricing outdrives?
LOL.
Not funny! I will be as easy as possible on the sticks, so we shall see. Hoping for the best.

BadKachina
02-19-2006, 06:30 PM
I use AZSM for my ecu's. On my boat I welded a bung in my header for an o2 sensor and had them run it live on the water. They can set it all up right there on the laptop, I don't see how you just mail in a ecu to someone and have them put a program in it, unless it's bone stock from the factory.

kevnmcd
02-19-2006, 08:52 PM
I use AZSM for my ecu's. On my boat I welded a bung in my header for an o2 sensor and had them run it live on the water. They can set it all up right there on the laptop, I don't see how you just mail in a ecu to someone and have them put a program in it, unless it's bone stock from the factory.
BK - The reason I was able to mail my ECU to Crockett and have him program it for me was that I used his whole upgrade kit. He has done numerous upgrades with this kit and been able to dial the program in based on these previous rebuilds. I agree with you that doing it your way would dial it in perfect but for now this will get me very close to being dialed in. I can always make adjustments down the road to get that last couple of ponies out of it.

djunkie
02-19-2006, 09:00 PM
BK - The reason I was able to mail my ECU to Crockett and have him program it for me was that I used his whole upgrade kit. He has done numerous upgrades with this kit and been able to dial the program in based on these previous rebuilds. I agree with you that doing it your way would dial it in perfect but for now this will get me very close to being dialed in. I can always make adjustments down the road to get that last couple of ponies out of it.
Have you taken her out yet?

BadKachina
02-19-2006, 09:11 PM
BK - The reason I was able to mail my ECU to Crockett and have him program it for me was that I used his whole upgrade kit. He has done numerous upgrades with this kit and been able to dial the program in based on these previous rebuilds. I agree with you that doing it your way would dial it in perfect but for now this will get me very close to being dialed in. I can always make adjustments down the road to get that last couple of ponies out of it.
That makes more sense, if those are upgrades he sells or recommends then I would imagine that he's done the combination before and would have a program that fits the mods. I worry more about a lean condition than performance.

Beer-30
02-20-2006, 08:26 AM
I use AZSM for my ecu's. On my boat I welded a bung in my header for an o2 sensor and had them run it live on the water. They can set it all up right there on the laptop, I don't see how you just mail in a ecu to someone and have them put a program in it, unless it's bone stock from the factory.
So far, AZSM doesn't have the rights to PCM555 programming. Only MEFI units. It would be nice if they could be the Arizona tuner for Merc. I do like that their 496 intake comes with a new MEFI controller. Program away!

kevnmcd
02-20-2006, 01:42 PM
Have you taken her out yet?
Not yet, still a few odds and ends to button up. I am planning on taking it out this coming weekend. Should have more pics and news then.

kevnmcd
02-20-2006, 01:44 PM
BK - I hear you on lean condition. I will definately be watch for that.

kevnmcd
02-27-2006, 11:44 AM
Just an update....Took the boat out on Saturday. Fired right up and ran good. Once we made it out of the no wake zone ran it up to 3500 rpms and checked the timing. Made a few adjustments and had it set right at 34°. From there did a little cruising to see how it responded. Ran it all the way up to 5000 for a short burst, but the rest was between 3000 and 4000.
I have to say that this boat is a completely different ride now! It pulled the 26p effortlessly. The mid range was unreal! It pulled hard all the way to 5000. Rev limiter is at 5400 and I still had some stick and trim left, so shouldn't be a problem getting it the rest of the way.
The idle was right at 800 which was a little high I thought. Do any of you remember what yours are at for something similar?
I also need to move the fuel pressure guage so I can get a more accurate reading. For those that have them, where are yours located? Also, I am looking for one that might just connect to the shrader valve at the front of the fuel rail....anyone know of such an item?

djunkie
02-27-2006, 11:46 AM
Just an update....Took the boat out on Saturday. Fired right up and ran good. Once we made it out of the no wake zone ran it up to 3500 rpms and checked the timing. Made a few adjustments and had it set right at 34°. From there did a little cruising to see how it responded. Ran it all the way up to 5000 for a short burst, but the rest was between 3000 and 4000.
I have to say that this boat is a completely different ride now! It pulled the 26p effortlessly. The mid range was unreal! It pulled hard all the way to 5000. Rev limiter is at 5400 and I still had some stick and trim left, so shouldn't be a problem getting it the rest of the way.
The idle was right at 800 which was a little high I thought. Do any of you remember what yours are at for something similar?
I also need to move the fuel pressure guage so I can get a more accurate reading. For those that have them, where are yours located? Also, I am looking for one that might just connect to the shrader valve at the front of the fuel rail....anyone know of such an item?
Sounds great. Congrats. Any idea on what your speed gains are gonna be?
As for the fuel pressure guage, I'd try Summit maybe.

kevnmcd
02-27-2006, 12:08 PM
As for speed, I am thinking around 8 mph. That is plenty...for now!

paradigm shift
02-27-2006, 07:24 PM
Great to see a project completion! Sounds like you are happy with everything, congratulations. Just curious did you take any plug readings? What do you have your fuel pressure set at to start with?
You may need a gauge that is liquid filled to help dampen the pulses when running if you don't already. Injectors open and closing will cause gauge to fluctuate. I have always just set mine static. I have a test gauge I use for temporary testing and setting and it fluctuates when running. More of a bounce than fluctuation actually.

kevnmcd
02-27-2006, 08:55 PM
Great to see a project completion! Sounds like you are happy with everything, congratulations. Just curious did you take any plug readings? What do you have your fuel pressure set at to start with?
You may need a gauge that is liquid filled to help dampen the pulses when running if you don't already. Injectors open and closing will cause gauge to fluctuate. I have always just set mine static. I have a test gauge I use for temporary testing and setting and it fluctuates when running. More of a bounce than fluctuation actually.
I haven't taken any plugs out yet to see what they look like. I need to get my fuel pressure down. Right now I have my gauge (liquid filled) right at the pump. I need to move it closer to the fuel regulator to get a more accurate reading. I should start with 42 psi and go from there with a max of 45 psi, according to Crockett.
Next time out I will have all the right tools and do some more testing.

paradigm shift
02-28-2006, 05:50 PM
Thanks Kevin and if I seem a little prying with detailed questions well it is because I have discussed this set up with Tyler also and have been waiting to see how turn key this is. I will tell you I am real happy that you can FEEL the difference in performance.

kevnmcd
03-01-2006, 09:01 PM
Thanks Kevin and if I seem a little prying with detailed questions well it is because I have discussed this set up with Tyler also and have been waiting to see how turn key this is. I will tell you I am real happy that you can FEEL the difference in performance.
Feel free to ask me any questions that you have, I will answer anything as honestly as I can. I will see how this season goes, but if the first trip out is any indication, I will be very happy!

frdvschvy
03-02-2006, 02:49 PM
I also need to move the fuel pressure guage so I can get a more accurate reading. For those that have them, where are yours located? Also, I am looking for one that might just connect to the shrader valve at the front of the fuel rail....anyone know of such an item?
Here is a link for the Fuel Pressure gauge you are looking for...
Fuel Pressure Gauge (http://www.maximummotorsports.com/fuelgauge.asp)

kevnmcd
03-02-2006, 03:19 PM
That looks like it might work. Thanks.

centerhill condor
03-04-2006, 04:10 PM
nice work and well illustrated! btw nice boat...awesome parts...

kevnmcd
03-05-2006, 02:25 PM
nice work and well illustrated! btw nice boat...awesome parts...
Thank you.

kevnmcd
03-28-2006, 12:43 PM
Just a little update.....
Had the boat out this weekend on Lake Mohave. Did some fuel pressure adjusting and some high speed runs and was able to push the 26p to 5400 rpms with a full tank of fuel! Best I saw on gps was 73.5 with 3/4 tank of fuel. I am sure that with a light load of fuel and a little more work on the trim that I could see 75-76!
That about does it.....now I should be able to just use it. :)

Beer-30
03-28-2006, 02:19 PM
Just a little update.....
Had the boat out this weekend on Lake Mohave. Did some fuel pressure adjusting and some high speed runs and was able to push the 26p to 5400 rpms with a full tank of fuel! Best I saw on gps was 73.5 with 3/4 tank of fuel. I am sure that with a light load of fuel and a little more work on the trim that I could see 75-76!
That about does it.....now I should be able to just use it. :)
And how is that compared to previous numbers? I can't remember what you were seeing before and with what prop.

kevnmcd
03-29-2006, 08:01 AM
Best I ever saw on gps was 71.2 mph going down river in front of Park Moabi with no fuel and 2 peeps at 5400 rpms with a 24p. On the lake best I saw was 69.9 mph with full tank and 2 peeps with the same 24p prop. Now I can push a 26p to 5400 rpms with a full tank and 2 peeps. The best part of this rebuild has to be the mid-range! From 3000 to 5000 rpm I can put your back against the seat and keep it there. It is absolute amazing compared to the old motor. I am very pleased with the results. Now I just have to remember to be easy on the sticks so I don't blow-up my drive!

j-dog
04-01-2006, 09:21 PM
Hey Boyz,
Looks like you all know alot about building 502 motors. Just picked up 94' warlock cat 25sxt. Did a little home work and found out is was a 502 gen 5 HO, I think? Looks like they started rebuilding the motor. when I pulled the valve covers, Looks like those pretty picks of those rolling rockers i seen in the thread.
Need some pointers from all.
The boat motor wasnt completed and has no carb or distrubtor? Any pointers on the best carbs for that type motor with black hawk merc dual prop. I was thinking holley, but I really dont know?
PS There is a whole in the hatch cover?
Want to insure that I do it right, where the last master left off.
Also, is there any schematics on connecting wires lines etc? I need to double check everything. I'm a wannabe mechanic and dont want to screw up anything. Any pointers send them on.
Thanks
Jeremy

kevnmcd
04-02-2006, 07:54 PM
Jeremy - You might try asking these questions in the Gear Head section, too. The one I built here is an EFI engine, so I am not in the know with all the carb questions. The hole in the hatch is probably from previous setup with a blower. As far as wiring diagrams and such, get a copy of the Mercruiser manual. It will have all that stuff in there. Good luck.

redi4fun
04-03-2006, 07:39 AM
Kevin,
Where did you get the valve covers plated. Was it reasonable? Did they do do them in a timely manner?
Thanks,
Mike

kevnmcd
04-03-2006, 08:33 AM
Mike - I had them done at Embee (http://www.embeeperformance.com/processes/p_coating.html) in Santa Ana. Did a great job and took less than a week. Price wasn't to bad...for the two covers was $80.

redi4fun
04-03-2006, 09:11 AM
Thanks

Beer-30
05-02-2006, 02:23 PM
Well? How's it running with some break-in time?

kevnmcd
05-04-2006, 02:05 PM
Well? How's it running with some break-in time?
So far so good! I will be out at Havasu this weekend putting some more hours on it, so I will know more on Monday. Haven't had it out since end of March trip.

Beer-30
05-04-2006, 04:12 PM
So far so good! I will be out at Havasu this weekend putting some more hours on it, so I will know more on Monday. Haven't had it out since end of March trip.
Very good.
We will be out for Memorial day, if you plan on being in the neighborhood - would be nice to see it in person!

kevnmcd
05-16-2006, 11:56 AM
Beer-30 - Won't be out for Memorial weekend, sorry.
I did put another 5-6 hours on it with no problems at all for the Eliminator regatta weekend. Just turn the key and go. Exactly what I wanted out of the rebuild. Very happy with the results. Will be out this weekend again for more.

Beer-30
05-16-2006, 03:00 PM
Glad to hear all worked out. That's cool. Happy boating!