496HO or 500EFI with whipple in the future?

01-06-2002, 03:08 AM

I am most likely purchasing a new 27' to 28' single engine boat this year and am going back and forth between engines (496HO or HP500EFI). My final goal is a solid 72-75mph boat at 6200 feet elevation, with regular trips to sea level. I am not afraid to put a whipple on the motor if I have to, after the warranty is up. Nordic, Fountain and Formula are the most likely candidates right now. With that in mind any suggestions on motors? Thanks.

39 Unlimited · 01-06-2002, 10:42 AM

I owned the 28 Nordic with a 500 Bulldog boat ran a solid 72 mph, had a 420 blower installed (5 pounds of boast) boat ran 84 mph.

Cattitude · 01-06-2002, 11:36 AM

I would pass on the 496 which has cast pistons and perhaps crank if there is a slightest chance of a Whipple in your future. You may be able to find a 454 or 502 mag somewhere as a leftover which is a much better affordable candidate. Make sure you get the XZ or XR drive. Good luck!

BODYSHOT1 · 01-06-2002, 02:05 PM

Wait & see what's up with the new Vortec's..

cobra marty · 01-06-2002, 03:39 PM

For the price difference between the 496 and 500EFI you could add the whipple to the 496 and have more power, speed and change in your pocket.

01-06-2002, 04:34 PM

Hey, Real Deal!

What prop and top RPM did you have, before the blower?

Thomas

[ 01-06-2002: Message edited by: Thomas ]

S4Hadi · 01-06-2002, 05:00 PM

Does the 495MAG HO bolt on without mods in place of a 7.4MPI BravoIII in a turnkey repower? How about the HP500 and is it compatible with the BravoIII?

From what I can tell the HP500 is about $8,000 more but it includes $3,000 CMI Headers... $5000 for a blue printed/heavy duty HO motor does not seem to unreasonable to me, if I had $20,000 to dish out that is.

Jamal

aTX427 · 01-06-2002, 07:57 PM

Whipple the HP. Mine is sweet. Check out the pics.

engine stb
engine port
whipple
cmi

[ 01-06-2002: Message edited by: BadCat ]

01-06-2002, 08:07 PM

How many on this board have actually run at 6200ft in elavation? I do on a regular basis and believe me you will need a blower to reach those speeds.I lost 12 mph after correctly proping my boat by going up 6200ft. The only solution was after the blower was installed.My expierance is that 6200ft +5psi boost=sea leval

28Eliminator · 01-06-2002, 09:27 PM

I'm with ya on that Donzi22. I am usually at 3200ft and I loose 5 mph (65) from 500ft elavation. If money isn't the issue the HP500 will get you the closest, but I think 75 is a stretch without a whipple. My plan is to add the whipple this year. Just my .02 worth!