Dave Aggressor lets put your parts to the test!

[beached1]

Yawn

[77charger]

back to the topic.I would be interested in seeing what each bowl or pump parts are capable of doing.If i were searchimg for the best performing parts i want to be able to open a box and bolt on a bowl,nozzle,impeller,etc and not have to have any pump builder set it up.Iam a do it myselfer person and would prefer to buy a performance part off the shelf.If it comes to custom fittng and set up i'd rather take my current parts to a shop and have the same done for less.Not spend say 500.00 for a bowl than another 1-200 to have it work properly.And i think the average consumer would agree.Using rrs boat would be a good test of parts where one could change a bowl,impeller,etc. on your own not a custom jet guru do extra mods.

[HammerDown]

I agree 100%...I'm not intrested in cutting a 10'th of a second off my ET. Or jamming 1000 HP in a 19 foot boat to make it go 120 mph. Show me what pump + Imp. does what(on the SAME boat) at just on plane, and 1000 rpm increments up to lets say 5500 rpm. Out of the box pieces, nothing massaged. Let the Aggressor man and Legend man or who ever set up the pumps, shoe,ride plate etc. And if one pump needs a 1000 hp motor or the other works better with 500 hp great, that's what some of us want to find out. And for crying out loud, all this CRYING ABOUT I SAID YOU SAID THEY SAID has to STOP!!! Your gona make a layed back fella like me jump off a bridge!!!
Till then...HammerDown.
[This message has been edited by HammerDown (edited January 25, 2002).]

[fryzll]

Yep, im w/ HammerDown. 1......2......3......JUMP!! http://free.***boat.net/ubb/biggrin.gif
Chris

[Blown509Liberator]

Hammer
I did just that...Almost. This came fom my Home page www.NothinButJets.com (http://www.NothinButJets.com) (Bowl Test):
First the test boat - 1999 502/502 powered 21' Liberator pickle fork tunnel hull. Pump is set up with a MPD shoe(1 deg taper with a .090 shim) and ride plate( 4deg up) MPD rough water Loader. Running an 'A' cut Legend impeller. Aggressor droop with 8deg. up and place diverter. Ride plate angel and shoe depth where kept constant for all tests.
Test 1: American Turbine Bowl
The AMT bowl had a great hole shot with the diverter down very little effort to get on plane. It had an avg top speed of 75mph @ 5000 rpm's speedo indicated. I noted that the tail at full throttle was very tall and with nozzle at full up I lost 7 mph and the rear felt like it was digging in.
Avg Top Speed: 74.6 mph (GPS)
Best top Speed todate: 79.3 mph (GPS)
Slowest planing speed: 15 mph
Test 2: The Aggressor 9 Vane Bowl
With the Aggressor the hole shot felt the same as the AMT very little effort need to plane,but this is where the similarities end, the Aggressor lost some punch from 30mph up and had a very disappointing best top speed of 67mph @ 4900 rpm's (100 RPM's less than the AMT). tail at full up was low and did not affect top speed at full up. I truly dont feel that the large loss of speed here is all because of the bowl . At that speed my tunnel hull is maintaining more wetted surface, bringing top end speed numbers down even more.
Avg Top Speed: 63.4mph (GPS)
Best top Speed todate: 67.8 mph (GPS)
Slowest planing speed: 19 mph
Test 3: Berkeley G bowl
As with the Aggressor and the AMT, very little effort need to plane, but again this is where the similarities end. The G even though it seem to take a little longer to get to the top speed out ran the other 2 bowl by far. Also the big numbers posted with this bowl where very consistent. I could reproduce the same speed time and time again. It like to run with a little less up on the diverter than the Amt and the Aggressor. The hull felt completey different. It felt as if it was in complete filght. Almost as if there was to much lift. With the preset 4deg up on the ride plate was to much maybe 2-3 deg would be better. Again the diverter in full up knocked 7-10 mph of the top speed.
Avg Top Speed 78.1mph (GPS) (@5000 rpms)
Best top Speed todate: 81.5 mph (GPS)
Slowest planing speed: 16 mph
So in summery, the bowls that claims the most CMF ran the slowest. Is that my modest 500 hp likes the tighter bowl to make more psi??Will this all change once the 509 blower motor is installed with the 300 more hp? I must say I am very surprised by the results. To tell you the truth i did not expect any difference between the 3. What do you all think?
But again. I got Flamed for it and was labled a MPD Cheerleader
[QUOTE]ChetCapoli
Member
Posts: 109
Registered: Mar 2001
posted June 11, 2001 08:08 PM
--------------------------------------------------------------------------------
You the man slowboat!
I like guys who tell it like they see it! Actually i think that test was done by a normal lake guy who just wanted to do some testing at the time. Just so happens the intake setup was done by MPD,(The one who says berkeley has the best bowl right boys?) Maybe that's why the berk did the best!Then again, you dont win to many races spining 5000rpm! [QUOTE]
from this thread. http://free.***boat.net/ubb/Forum4/HTML/000333.html
[This message has been edited by Blown509Liberator (edited January 28, 2002).]

[HBjet]

So, where are we with this test? Dave, will you be willing to send your products to John West at Ultra for testing on a brand new boat? I believe tests will be done with speed rating for every 500 rpm greater. Example, you start with 2500 rpm, then 3000, 3500, 4000, 4500. I'm sure you get the idea. After testing, the results will be posted in formal write-up on the internet for everyone to see. IF the results are in your favor you could have a link on the Aggressor site for customers to see who have the same questions as we do. You could have Tom Papp present of you like to do the pump work, if not Ultra I'm sure would have someone that could perform the change with no problem. These products would have to be off the shelf, out of the box items, no special cuts. I'm pretty sure they will test just with the bowl, and then with the bowl and impeller change. I would really like to see this happen. I know you want retail dollars up front for the items before testing them, and if they run better/faster, the customer or Ultra has to buy them. I say this would be some great advertising for you, and the cost for one impeller and bowl is a lot less then an add in hot boat. Lets not forget all the new customers you might be getting from right here on the boards. Ultra may even look into using them again. Well, let us know for you are still up to this, or is the only way you will do it if everything is paid upfront? Thanks
HBjet

[RiverDave2]

Just outta curiosity... What happens if everything is paid for upfront and then it's not faster? Does Andy get his money back? Does anyone have to put a Berkeley sticker on there truck for a year? http://free.***boat.net/ubb/biggrin.gif j/k
In all seriousness though, even though I'm not a jet guy I'd really like to see this happen as well! I love watching products go "head to head." I'd have to agree with the no special cuts though...... Or..... http://free.***boat.net/ubb/wink.gif Someone ought to give the boys at Berkeley and Legend a call and let them make some "cuts" as well to be fair.
RD
RD

[rivercrazy]

And an AT or Dominator

[LVjetboy]

The thing about special cuts, clearancing or setup is you no longer know if the performance gain is from a better pump design, or from the blueprint work, or some unknown combination of both. I think most here are interested in what the design alone gives, then they can go to their favorite builder or do their own tweeks to get more if they like. So out-of-the-box test is what I'd like to see too. Also under similar test conditions...I've seen a difference in 3 mph top end just with cooler air temps.
jer

[ChetCapoli]

Originally posted by Blown509Liberator:
But again. I got Flamed for it and was labled a MPD Cheerleader
[QUOTE]ChetCapoli
PM [/B]
Now where did i label you a cheerleader??? Maybe mentioning that you had a few "grey" areas in your test, yes but that's pretty much about it. FYI, my boat at 5 grand runs 64mph but at 5800 it runs 80. 5000rpm is just not conclusive enough. With a test like yours, you need to run it from one end of the spectrum(say 3grand) to the other( like 6500). As i always said, comparing the bowls is like comparing a dart320 to a HP chevy head, nite and day.