MILD THUNDER

iTrader: (3)

Don't you have a pro systems blow thru 950 you can sell him?

Tunnelvision has them on his engines . Setup from prosystems was off a bit. Power valve selection and jettin a bit .

Hopefully they will idle better with smaller cams he is going to, and not pumping water thru the chiller at idle like it was.

Personally I'd go with a aftermarket efi. Call boost power and talk to Jerry . He can set u up with a complete kit pretty reasonable

mike tkach

iTrader: (3)

i agree,bostpower has a lot of experiance working with pro charger stuff and would be a good choice,also eddie young can help,both boost power and young performance are very professional .

slippy0217

I have Holley throttle bodies efi on my motors and the prochargers set up I have has the blow through system I was thinking about swapping to merc efi also so y'all suggest stay with the blow through system and Holley efi

mike tkach

iTrader: (3)

all pro chargers are a blow through setup,as said before,forget about the merc throttle body,call boost power,jerry wil explain to you exactly what you need and why.

offshorexcursion

iTrader: (5)

Yes you easily can make well over 800hp, easily 900-1000. I run 9psi M3SC procharged 500efis. Zero problems and they make a ton of power!

Enjoy!

HaxbySpeed

Are you running a Holley ecm? Is it the older 950 series or the newer HP? Is it the 1000cfm billet T-body with fuel rails or are you actually running throttle body efi with the injectors in the T-body?

Young Performance

I believe he has the Holley intake and TB with a Mefi 3 ecm.
Eddie

articfriends

iTrader: (1)

I made 1115 hp with the mpi intake, it took alot of work and probably coulda made 1150-1200 with something more ideal so it can be done but by the time you make twin rails,have intake ported, throttle body bored you could just buy a better intake that has rails that bolt right on it and a throttle body that poses no restriction. At the 800 hp level I would probably modify what you have but if your talking 1000+hp then its time to step up. If your intake was ran in fresh water and is un-cut it will fetch 400-600$ EASY to someone that has a rotted out one on the coast.
Heads:Your heads are going to either need some serious work or its time to upgrade them too as Edelbrocks are really a entry level head that needs MASSIVE porting to even come close to a out of the box AFR of equal size or even a Dart. In comparison not knowing what heads your edelbrocks are, even the 315 cc marine rectangle port rpm heads flow a dismal 297/228 at .600, pretty much the same numbers as box stock factory rectangle ports, in comparison a set of box stock AFR 315's flows 380/296 at .600 VS 297/228 of the E heads, a 28-30% difference, 28% of 800 hp is 224 hp, a motor that makes 800 hp with your heads will make 1000 with the afr's as long as something else isn't the limiting factor holding it back. When I first built my 540 I had Merlin grumpy Jenkins 310cc heads (which have numbers identical to the Edelebrocks pretty much), motor made 700 hp on the dyno , a few years later I freshened the shortblock, bought much better AFR 315's, had Bob Madera optimize the cam profile (it was about 2 1/2 sizes up the ladder from what I previously had) and went back to the dyno and made 950 hp from better cam, heads and intake work, a 250 HP gain. If you want 800 hp, get your E heads ported, if you want 1000+ SELL them and start with something better, Smitty

rob vanharten

2:03 am Smitty.... couldn't sleep last night I have been kicking around a new idea. Run what I have the way it is right now, and enjoy the boat. In the mean time, start collecting and slowly start building a 540 or 572, with really good parts. Oliver, Lunati, je, dart big m, dart pro 1's, m4, and so on and so forth. Then when I have that engine all done and dynoed at 1100-1200hp, just simply swap my new power into the boat. And sell the old power to help put a new Imco scx on the back, cause the xr will last about 2hrs behind the new power. I couldn't sleep last night either!!! Couldn't shut the brain off.

ezstriper

yes, I have the prosystems carb, dart intake and box, that was spot on with my 509...