Monza355

iTrader: (3)

I want to build a rear mount turbo kit for my 1978 Monza. It is a built 355 (I'm going to convert to an LS1 later and keep the turbo). I will be buying the universal STS kit and need to know a few things.

1. Will I be able to run an edelbrock 750 or do I have to switch to a holley
like ATI recomends for there procharger kits?
2. Is my cam a little to big for FI? 234/244, .497/.504, 112LS
3. Do I need a FMIC?

I will use a carb hat and boost referenced fuel pump. My compression is 9.5 to 1 and I want to run 7 to 10 lbs of boost. Any other hints or tips would be helpful. I'd like to get 450 RWHP out of this setup. Thanks in advance.

Monza355

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Here is a good place for turbo/carb information.

http://turbomustangs.com/forums/foru...?s=&forumid=13

hellbents10

iTrader: (10)

A carb upgrade will be manditory. You can do the mods yourselft to go to 8psi or so but above that it will start to cost some coin. Also it might be time for a different cam somewere along the lines of a single pattern or revers split. With a little more LSA, not so much overlap.

pwrtrip75

iTrader: (8)

edelbrock will not work. Holley 4150 must be converted to blow through. carb shop does it for $500.
this place might be cheaper than the carb shop www.tpcracing.com/
sealing the carb up alone, the secondaries wont flow enough fuel. they knock out the boosters, replace them, and do some other secret stuff they wouldnt tell me.

hellbents10

iTrader: (10)

Don't you hate that secret stuff.

IMD

iTrader: (10)

barry grant makes an awesome blow through carb. you will blow the power valves out of pretty much any other carb, and on the edelbrocks, you will most likely pressurize the float bowls and have a real mess on yer hand...if not a fire.

carb shop also does good work. this months super chevy has a writeup on a blow through carb 355 that ends up making 765 hp on pump gas.

Monza355

iTrader: (3)

Great info. Thanks Do you think 450 RWHP is attainable with under 8 psi?

Monza355

IMD

iTrader: (10)

with 9.5:1 you would probably make closer to 500-550. an intercooler is mandatory IMO. some out of date inbreeders would probably tell you that you can get away without one....but i wouldnt. as for the cam, if budget allows, look for somethign with more lift, and a little wider LSA. the duration looks fine. that cam will make awesome midrange, and will spool the turbo up quickly, but you woulld be loosing a little off the top at max boost.

in other words, 450 RWHP would be easy.

Monza355

iTrader: (3)

My compression is about 9.5 to 1. If I need to change cams, should I go with more LS and less duration? Switch to roller cam? I have a forged short block and right now it makes about 360 at the wheels. If I could gain 200 more than that would be great!
Thanks,

Monza355

IMD

iTrader: (10)

well, if the budget allows, you cant go wrong with a big nasty roller cam. the duration you have is fine, go for more lift (high .500's) and a 114 or so LSA. use good head studs, and a cometic, or other quality headgasket intended for FI use. the only things really keeping you from making big power are the heads and cam.

SC used AFR 220's a hydraulic roller with 530/520 lift, 230/242. 114. 1.6 rockers, 10 psi of boost with a D1SC procharger, pump gas, a single plane intake, with a 355 8.8:1. with some tuning, and the right jetting and timing. the motor made 765 hp and 626 tq.

Monza355

iTrader: (3)

I can't get new heads right now so I'll stick with the TFS heads. They have 2.02/1.60 valves and 64cc chambers with 195 cfm intake runners. I'll get a Barry Grant blow through carb, a better cam, FMIC and I'll talk to STS about the universal kit again. I'll be building this in the spring and let you guys know how it all works. Thanks

Monza355

Race Car Driver

You should take this to the SBC/BBC forum.