bigmotor

where is money best spent for mph
28 apache / twin 502 mpi /bravos /25p 4 blade hydromotives and $10,000

thinking pro chargers or whipple charger would be the easiest MPH

Any other ideas ?????
Could squeak out a couple more 1000's like 12k 13k but not much more.
Any idea how much MPH I could pick up?? Also which part of the bravo is most likely to fail??

sell boat and take my 10k try to buy up ???
I'm not in the 100k check book crowd so that could be tuff

Craney

iTrader: (2)

540s

LAKESIDE RESTORATIONS

You wont be able to boost it on that budget unless you can do all of the work yourself, or unless thats your budget per engine. If you are only looking for 1-3 mph then try props & exhaust, If you are lookingfor more speed than that & your budget is in the range you specified then you may want to get a different boat.. The Apache's are an excellent boat & ride superbly, however they take a good ammount of power to cook... Hope it helps you.. Jamie / Lakeside

bigmotor

I do most of my own work,so that helps stretch a dollar!!
These things do add up fast!!

Any ideas which system is a better choice??
I think I just answered my own question.
check this link

http://www.cpperformance.com/detail.aspx?ID=2963
Looks like this procharger set up from CP could work out,of course there are always the unforseen extras that come along with it.

Panther

Do you want to keep the EFI?

Somewhat cheaply (a relative term) you could add a set of blowers from the Merc. 575's, put a good cam, change pistons or maybe even keep them, add some carbureators and make over 600 hp.

then sell your efi setup and make some money to offset your costs..

bigmotor

If this was a car for the quarter mile,I probably would dump the efi with out worry, but in this instance,I think it is worth keeping the EFI.
I'm not sure how much improved things are for 2008 from Merc as far as efi big blocks.

New question---- If I got all the stuff from a 500hp efi motor ( the blue stuff)--intake, electronics ,ect... fuel pumps maybe?? Would I have a 500 horse motor??? Or is there more to it than a program,and intake??
Any guru's out there ???

TexomaPowerboater

What kind of speeds are you seeing with the 502MPI? How fast are you wanting to go? I think your mistake was buying a 28 apache after having a cat. I'd take the cat out for calm days and the apache out on rough days. She won't see 80, but you won't need to going that fast in 4-5's to have the ride of your life either.

I've seen those 502MPI's beefed up to 520hp 572torque and keep the EFI- see thread http://www.offshoreonly.com/forums/s...light=derebery - that would be my choice for more speed.

LAKESIDE RESTORATIONS

The cam & valvetrain are also particular to the 500hp efi. If you deviate you may have running issues unless you reflash. That said 500 horse out of a 502 mag mpi is doeable with the factory intake, right cam/valve train, headwork, exhaust and ecm program. J

Steve_H

you might try some 3b 25p old style mirage props. they seamed to work the best on the 28 i had. if you can turn the rpms with the 25's go to 27's and have them worked.

delsol

bigmotor-- what kind of speeds are you seeing with the 502's? I just recently did an engine swap in my 28, still doing some prop testing but these guys aren't kidding when they say the 28 takes some ponies to get them moving!