Guess my GPS speed.

[beaverretriever]

Ran it this Sunday morning at Mead. Its slow :(
Conditions: pretty glassy, around 1100ft elevation, very light breeze.
Boat: Lightning 23XS, 22 pitch stock bravo 1 prop..
Engine: 6.2 MPI 377ci, Completely stock, Through transom exhaust with Dana Marine Muffled tips.
Other: Half a tank of fuel (around 25-30 gallons), Two People, One small cooler, and a big stereo.
Take a guess. It was slower than I thought it would be. Im dissapointed, but it gives me somthing to shoot for on the next boat.....speed. LOL
Curious to see what you guys guess.
:)

[hoolign]

56 mph

[HavasuSelect]

56.5

[BadKachina]

Ran it this Sunday morning at Mead. Its slow :(
Conditions: pretty glassy, around 1100ft elevation, very light breeze.
Boat: Lightning 23XS,
Engine: 6.2 MPI 377ci, Completely stock, Through transom exhaust with Dana Marine Muffled tips.
Other: Half a tank of fuel (around 25-30 gallons), Two People, One small cooler, and a big stereo.
Take a guess. It was slower than I thought it would be. Im dissapointed, but it gives me somthing to shoot for on the next boat.....speed. LOL
Curious to see what you guys guess.
:)
63?????

[HavasuSelect]

Does the winner get a free bottle of Goose?

[beaverretriever]

Good guesses. I feel bad you guessed 63. I wish..LOL
Less than 63 more than 56.
Im impressed how close you guys are.

[ratso]

60

[BadKachina]

57

[BadKachina]

58

[BadKachina]

59

[BadKachina]

61

[BadKachina]

62

[HavasuSelect]

60.2

[ratso]

61
...post *****... :mad: :mad: :D

[BadKachina]

Is this the higher lower game from Price is Right???? :rollside:

[HavasuSelect]

1 dollar

[Tom Brown]

95 kph

[beaverretriever]

59
Close enough....
59.1 It is.
Fricken slow isnt it? I was sure I would break 60.
Would a set of headers, and prop make much of a difference? We are going to keep this thing 2 full seasons and move to somthing much faster but I would like to get a little faster.
Is 59 pretty slow for that setup?

[ratso]

59.1
Is it. Fricken slow. I was sure I would break 60.
Would a set of headers, and prop make much of a difference? We are going to keep this thing 2 full seasons and move to somthing much faster but I would like to get a little faster.
Is 59 pretty slow for that setup?
...what rpm's?

[BadKachina]

I would just try and enjoy it. By the time you try different props, lab finishing them, headers etc. you'll spend a couple of thousand to gain a mile an or hour or so.

[ratso]

Jordy would be the first to tell you that a Kajunka couldn't come close to those numbers... :rollside: :)

[beaverretriever]

...what rpm's?
I looked to be right around 4800 to 4900.
Good-bad?

[framer1]

61

[BadKachina]

Jordy would be the first to tell you that a Kajunka couldn't come close to those numbers... :rollside: :)
Damn weed whackers......... :crossx: Maybe I could get 58 down hill.

[ratso]

I'd just try props, and go a bigger motor on the next boat. Mods ain't cheap...

[boatnam2]

please dont say you were exspecting the est mfg speed,you can cut 5-7 mph of that and it will tell you how fast your boat is.

[boatnam2]

I would just try and enjoy it. By the time you try different props, lab finishing them, headers etc. you'll spend a couple of thousand to gain a mile an or hour or so.
exactly 58mph or 63mph whats the difference.

[beaverretriever]

please dont say you were exspecting the est mfg speed,you can cut 5-7 mph of that and it will tell you how fast your boat is.
They actually told me 60. So I dont feel that bad. Im 9/10ths off of that. Im sure if I just opened up the exhaust I could hit that 60 mark.
Not a big deal, the new boat will have 8000hp and go at least 100. :D

[Tom Brown]

Im sure if I just opened up the exhaust I could hit that 60 mark.
I'd be surprised if exhaust changes were to make any difference at all.
Personally, I'd look at trying a QuickSilver closed hub cleaver or a Revolution 4. I have no doubt that 1 mph can be gained fairly easily.

[Fast Freddy]

59.1
Is it. Fricken slow. I was sure I would break 60.
Would a set of headers, and prop make much of a difference? We are going to keep this thing 2 full seasons and move to somthing much faster but I would like to get a little faster.
Is 59 pretty slow for that setup?
put a cigarette sticker on it. that ought to be worth at least 5 mph.

[RitcheyRch]

58.5

[BadKachina]

put a cigarette sticker on it. that ought to be worth at least 5 mph.
Then what? You'd smoke it????? :crossx:

[playdeep]

Fast Freddy...
2002 Rage w/688 hp that only runs 86.8...?
Honestly...I wouldn't brag about that :rolleyes:

[Napanutt]

I have a 22 prop on my 24 Cheetah 7.4 Bravo I,my speedo doesn't work but I've been GPS'd at about 57 (thanks Chris),thinking about trying to prop up (24-26)...I plane very easily,wondering how much more MPH could get from the prop up...

[SummitKarl]

I looked to be right around 4800 to 4900.
Good-bad?
I would have expected more mph w/23', 6.2 and 22p, I have seen a 63 out of Ziggy's boat which is identically equipped
what did your boat speedo say, usually they are on the + side of GPS

[DMOORE]

Going to a bigger prop most likely isn't going to help. If you can only turn 4900 RPM with a 22 pitch, Going up in pitch will only drop your RPM even more.( approx 300 rpm for each size up on a bravo). Spend your money on fuel and enjoy your boat.
Darrell.

[DMOORE]

:) BTW: with one person , no cooler ,4in chop, and a cool day, guarantee you'll hit 60.
Darrell.

[upsman105]

Jordy would be the first to tell you that a Kajunka couldn't come close to those numbers... :rollside: :)
That is exactly where Kachina's are with that motor and prop. No matter what that weedwacker runner says. A prop is not going to help much, anything you gain you will lose somewhere else. Call whipple if you really want that thing to go much faster.

[phebus]

Buy a bigger ice chest, and all is good :)

[beaverretriever]

That is exactly where Kachina's are with that motor and prop. No matter what that weedwacker runner says. A prop is not going to help much, anything you gain you will lose somewhere else. Call whipple if you really want that thing to go much faster.
I thought about putting a set of headers and a blower but we will only keep this boat 2 more seasons then go to something bigger and faster.
I would love to see 70 or around there, I just cant justify the money needed to get to that with this boat.

[beaverretriever]

I would have expected more mph w/23', 6.2 and 22p, I have seen a 63 out of Ziggy's boat which is identically equipped
what did your boat speedo say, usually they are on the + side of GPS
Speedo was reading 64. GPS read 59.1. Not horrible. Im supprised when we run in Havasu how many big blocks we hang with. I dont know if they are just not gunning it or what. 60 is slow though. I cant wait to get a faster boat in a few yrs.

[GHT]

They actually told me 60. So I dont feel that bad. Im 9/10ths off of that. Im sure if I just opened up the exhaust I could hit that 60 mark.
Not a big deal, the new boat will have 8000hp and go at least 100. :D
If you prop 8,000 hp properly you might be able to squeeze out 110mph. You may have to do it with 1/4 of a tank of gas though.. :rolleyes:
60 aint too bad... If your RPMs are 4800 /4900 you probably won't be able to go up on the prop. If you went to 24p you will drop your rpms about 300 / 400 rpm. I believe you want the max rpms to be around 4900 / 5000 for best performance...
.02 :)

[GHT]

That is exactly where Kachina's are with that motor and prop. No matter what that weedwacker runner says. A prop is not going to help much, anything you gain you will lose somewhere else. Call whipple if you really want that thing to go much faster.
496HO / 24p / 5000 rpm equals 66 in the winter and 64 in the summer for my 30' Kachina Shadow... Not GPS though just on the speedo, So I'm sure there is some slop in the numbers just don't know how much... But I know it's not off by 6 mph.

[beaverretriever]

If you prop 8,000 hp properly you might be able to squeeze out 110mph. You may have to do it with 1/4 of a tank of gas though.. :rolleyes:
60 aint too bad... If your RPMs are 4800 /4900 you probably won't be able to go up on the prop. If you went to 24p you will drop your rpms about 300 / 400 rpm. I believe you want the max rpms to be around 4900 / 5000 for best performance...
.02 :)
I dont think its too bad. I see a few guys with big blocks running slower..LOL Im not going to put any money into it. Its fun. Faster is always more fun but that will happen in a few yrs.

[beaverretriever]

496HO / 24p / 5000 rpm equals 66 in the winter and 64 in the summer for my 30' Kachina Shadow... Not GPS though just on the speedo, So I'm sure there is some slop in the numbers just don't know how much... But I know it's not off by 6 mph.
I have been in at least 3 different boats when we checked the speedo against gps. It has been about 3-7 mph off on all three.
I even tried it with two different GPS systems to make sure it wasnt the handheld.
Ours was off about 4-5.5 depending on our speed. At WOT it was off about 5. Im running Livorsi guages btw. :)

[upsman105]

496HO / 24p / 5000 rpm equals 66 in the winter and 64 in the summer for my 30' Kachina Shadow... Not GPS though just on the speedo, So I'm sure there is some slop in the numbers just don't know how much... But I know it's not off by 6 mph.
He's running a 23' with a 6.2, please compare apples to apples. :rolleyes:
Most compatible Kachina is a 23' bandit with a 6.2. :)

[playdeep]

What's the rev-limiter set at on a Merc 377?
You can always have the prop labbed or changed to a different pitch in order to pick up 1-200 rpms...

[BadKachina]

He's running a 23' with a 6.2, please compare apples to apples. :rolleyes:
Most compatible Kachina is a 23' bandit with a 6.2. :)
When you say 6.2 you mean a black motor I assume? I have a buddies Bandit in my back yard with a Scorpion in it that runs about 68. It's fast for a small block boat but the Scorpion is a blue motor without headers.
Mine will run 60+ trimmed all the way down, without a Whipple. It does have a huge cam and Dart Pro 1 heads, headers, Vortech, bigger injectors, Aeromotive fuel system, extruned honed intake, and more time and money than my wife knows about. :rollside:
http://www.***boat.com/image_center/data/520/3078P1010038.JPG

[upsman105]

Okay I'm going to call you out on that scorpion doing a real 68 m.p.h. I don't think it has that much more horsepower than a black motor. not 8 m.p.h.

[beaverretriever]

When you say 6.2 you mean a black motor I assume? I have a buddies Bandit in my back yard with a Scorpion in it that runs about 68. It's fast for a small block boat but the Scorpion is a blue motor without headers.
My boat is an 06 with the new 6.2. Yes the black engine. Completely stock. No headers, no nothing.

[ultra27jay]

who cares lets see some picts of the WIFE holding the gps for some proof....lol :crossx:

[upsman105]

My boat is an 06 with the new 6.2. Yes the black engine. Completely stock. No headers, no nothing.
Your post count here was 377, that's the size of your motor....I know I'm easily amused. :rollside:

[beaverretriever]

Your post count here was 377, that's the size of your motor....I know I'm easily amused. :rollside:
That is strange... but not any longer...LOL 378. To bad my engine displacement doesnt just go up like that. :)

[beaverretriever]

who cares lets see some picts of the WIFE holding the gps for some proof....lol :crossx:
LOL, it was chilly at some speed on the lake today. She had a bikini on but it was covered with shorts and a sweatshirt. Sorry.. :( LOL :p

[BadKachina]

Okay I'm going to call you out on that scorpion doing a real 68 m.p.h. I don't think it has that much more horsepower than a black motor. not 8 m.p.h.
You could be right, it's not my boat and I've never ridden in it. It is however the same speed as Jim's 27 fountain with a 496ho. That I've ridden in and it does 68 on a gps at Pleasant. I've also seen the two of them running side by side and niether can get away from each other, so even if it's not 68 it's pretty darn close.

[upsman105]

I'm not trying to keep stirring this up but I know a stock black motor does about 60 m.p.h. in a bandit, it is 320 h.p. the scorpion is only 350 h.p. I wish 30 h.p. would give you 8 m.p.h. but, we both know it won't.

[BadKachina]

This is from Powerboat magazine, keep in mind the test boat is running the same prop as the Bandit in my back yard. I'm still not saying your right or I'm right, I'm guessing at this point from what I've observed.
ULTRA 247 XS
Expect great things from the Ultra 247 XS, the company's largest model, and you won't be disappointed.
Story by staff
Discovering excellence-that's what our annual Performance Trials are all about. The possibility of finding something rare, something precious, makes getting up before dawn and working into the evening worthwhile. (Plus, testing boats is fine work.)
We found just that on the Colorado River in Parker, Ariz., and it's called the Ultra 247 XS. Built by Ultra Custom Boats of El Cajon, Calif., the 24'7"-long, 7'8"-wide model proved to be a finely crafted thrill machine.
Base price for the 247 XS, Ultra's largest model to date with a MerCruiser 7.4L MPI motor is $47,900. Our test boat came with a single option, an upgrade to Mercury's sizzling Scorpion 377 small-block, that raised the price to $53,900.
At that price with that engine, the 247 XS isn't a bargain. It's a steal.
Performance
Ultra builds about 250 custom boats a year, and for its newest model-the 247 XS-the company went the stepped-bottom route. Our test boat's 20-degree transom-deadrise hull boasted two steps, a delta pad and four strakes. The inner strakes terminated in the middle of the second running surface, and the outer strakes ran full length.
The idea of equipping the boat with efficient small-block power, particularly the 360-hp Scorpion 377, was inspired. To that powerplant, the manufacturer married a Bravo One drive spinning a Mercury Offshore Performance Series 14" x 23" four-blade stainless-steel propeller through a 1.5:1 reduction.
Ultra's owner, John West, worked with his crew until 3 a.m. to finish the boat and have it on the launch ramp by 6 a.m. the same morning. He estimated the 247 XS would go 70 mph. He had no time to test it; he just had a hunch.
We were skeptical but West was ... right on the money. The 247 XS ran a radar-recorded top speed of 70.6 mph at 5300 rpm.
In terms of acceleration, the 247 XS strutted its best stuff in mid-range tests, although its time to plane of 5.1 seconds was certainly respectable and its speed of 64 mph in 20 seconds was impressive. But what we really appreciated was that the small-block-equipped boat was able to shoot from 20 to 40 mph in 4.4 seconds, 30 to 50 mph in 5.8 seconds and 40 to 60 mph in 7 seconds.
When it came to handling, the 247 XS was at the top of its class. It carved slaloms at 30, 40 and 50 mph with surgical precision, displaying a comforting amount of lean-in and zero roll to the outside at the completion of each turn. In circles at cruising and full speeds, the boat never slid or hopped, and it refused to blow the prop.
At one point during our test, we found ourselves running 60 mph through a jumble of large wakes. We braced ourselves, expecting to get bounced around a bit. The boat sliced through the confused mess with no problem. The larger wakes did cause it to sway, but it recovered quickly without any sort of trim or steering input from our test driver. That kind of stability is uncommon from a relatively narrow 24-footer.

[upsman105]

Just out of curiosity when was that?
I'm not trying to argue with you...seriously.
My only experience is with the bandit. I'm kind of surprised they thought that was such a big upgrade from the big block. They say 360 h.p. but mercruiser says 350, not a big difference just strange. It's funny do you think they were going down river at the time of that gps reading of 70m.p.h.?