MnHowardCat

I jest completed my motors with 2.3 Whipple's and the dyno numbers were 778hp on the starboard and 795hp on the port at 5300rpm

The motors were hp500efi's with the Whipple kit it was so-post to make 625hp I think it was closer to 575-580hp at 5200 rpm and 4 1/2 - 5 Lbs of boost
My opinion you are making 700 ish Good Luck

The new motors stats
1 inch smaller top pulley mad 9 Lbs
Dart Pro 1's 325cc cnc ported by Indy
Carin cam 625/625/256/256
4.5'' flat top Je pistons zero decked the block

Don

Dyno run video
http://www.speedwake.com/photopost/s...cat=519&page=1

Pat McPherson

Hi K.
Your speed numbers are vary similar to Jcap's boat when he was running a 700HP/509cube, Bravo prop and no drive spacer. So unfortunately it would appear you have only gained about 100HP.
If I remember correctly from the thread you wrote a while back, the 2.3L Whipple is good to about 750HP with a pulley change. There is probably a few more ponies that you can squeeze out of her; I'd call JC Perf and Whipple.
Also, your prop slip numbers indicate that there is another couple mph to be gained there as-well.
You'll have her running 90mph before long...

Strip Poker 388

iTrader: (6)

JC Perf did a 502 build up with the 2.3"s He made about 750 hp on 500efi ...Mascara 34 Hustler . He did do a pulley change I believe it was around 7lbs

As far as the 3.3 being small for a 540 . I have a 510ci and spun the blower up to 2.125% over at 11.5 lbs of boost . it did not hit a wall ,wasn't building up excessive heat.i think it could of still made more power if I have a good short block and spun it higher

I wonder if the tune up is off??????

rob

HP350SC

Here is a thread that may shed some light on this...
http://www.hotboat.net/forums/showth...&highlight=2.3

z.zuperboat

What Are The Specs On The Camshaft. Did Jc Say It Was Supercharger Friendly ? Any Cam Will Work But Some Will Make Much More Power Than Others.

Pure Energy

Just talked to JC. He said cam is good.

WildWarrior

We through an extra 300hp per side to our TopGun with only a 3 mile per hr change, from 82 to 85mph GPS over our stock Merc 600SC power.
My engine builder was a bit frustrated to say the least, it wasn't until he personally pulled a hook out of my bottom that I couldn't even detect with my 8' straight edge, did we finally gain the expected 10 to 12 additional mph.
I cant say that this is your case, she may simply be down on power, however the bottom may be something to look at. For us it was like hitting a brick wall all between 5200 and 5800 rpms the boat just stopped going any faster at 85MPH or so.
Good Luck!

Strip Poker 388

iTrader: (6)

Pure Energy so what you end up doing or finding out ????

SB

iTrader: (1)

I'd call Superboat to see if there is any drive height, drive shape, and/or hull changes that need to be made once up in this speed area.

drgnrydr

what a great read ,sorry to but in.Im thinking about installing superchargers on my eliminator so Im reading up on all I can. can a 525 handle a quad rotor & be reliable ?