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Old 08-11-2009, 07:30 PM
Doc Hawk Doc Hawk is offline
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350 SBC Build Help

I am building my first small block Chevy and I would appreciate the guidance and input from folks who have gone down this path before me. I can build you a Nissan L6 motor that puts out double the stock HP with my eyes closed, but I want to try something new and I'd like to get it right the first time.

Project
I will be dropping a 350 block into a 1972 Datsun 240Z. 010 block from 1973.

Intended Use
75% street/ 25% road course. Spirited street/canyon driving "for fun" (not a daily driver), non-competitive high performance driving events on road course race tracks.

Power Goals
It would be nice to have 400 HP for bragging rights, but I think if I am anywhere in that area it will feel pretty darn good in a car that weighs 2400 lbs.

Budget
The idea is to show how much power can be put down by the venerable Chevy V8 without spending much money. I can wind the heck out of an L28ET and get 500 HP very reliably... for about $10K, done right. I believe I can put 400 HP in a SBC for under $2000.

Why a SBC in a 240Z?
I already have a very high strung 240Z that is 20% street/80% race (bad idle, obnoxiously firm suspension, very grippy racing clutch), so this car is intended to be more streetable. I figured the V8 motor will give me a much smoother powerband than the I6 does when it is built for 250+ HP.

Planned Build
Edelbrock Performer 750 carb
Edelbrock Performer RPM Intake
ProComp PC3003S Aluminum Heads (64cc/210cc, straight plug)
Custom valvetrain and head work from my machinist
1.6 Roller Rockers (mfg. not selected yet)
Hydraulic roller lifters (mfg. not selected yet)
Hooker Super Comp Block Hugger headers (to clear stock steering in my 240Z)
Whatever hydraulic cam the smart people at COMP recommend with this setup
Stock bottom end w/ stock forged, dished pistons

Discussion
Will this work? I am choosing the cam last as I figure that is what the cam help line is for; they know their products after all.

Will the large runners on the 210cc heads match up with the intake? Any special gaskets I need to think about? Is that too much intake volume for 350 ci?

Any idea what CR this combo will yield? Looking to run California's lousy 91 octane at most; I don't want to have to put race gas in here all the time. 87 wouldn't be bad, either, because I'd love to beat my import buddies using Regular Unleaded.

No need to bash the ProComp heads in this thread. They are dirt cheap and my engine builder has put them in several race cars. Some of those race cars are winners, both in drag and dirt. He likes the 3rd gen ProComp head at the price, and he's willing to do the machine work to make them pretty. He says he refuses to use their assembled heads as he's seen too many assembly issues and doesn't trust their valvetrains. I trust the guy and he's always given me good motors, so...

What else? Will she make power?

Thanks all,
David

Last edited by Doc Hawk; 08-11-2009 at 08:14 PM.
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