Thread: 540 BBC heads/cam

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Originally Posted by ekitch

Hi u guys,
I am new to this forum. I have read a lot here and like what I read.
I am currently building a 540 big block chevy for my 1970 Corvette. I love this car a lot, it currently has a small block 350. I figure the engine is the easy part, everything around it is the problem! My other car is a '94 Z28 blown 355 LT1 about 600 horse, that car is pretty fast. The vette is going to be a high performance street car, not a race car!

Here are my plans for the motor, please post any comments:
Gen VI bow-tie block, 4 bolt splayed, 4.5" bore
SRP 8 cc domed pistons, H-beam rods
Static compression approx. 10:1
Solid Roller cam, around 240-250 intake/250-260 exhaust duration, 650 lift, 112 or even 114 LSA, need a decent idle if possible
Heads: Edelbrock Victor 24 deg 345 cc, Dart 325, or one of Trick Flow's new heads
Intake: Edelbrock Vic Jr or Holley Strip Dominator
Carb: Speed Demon 850 DP

The big question is the heads of course, such a critical component of the engine. The exhaust ports on the Edelbrocks are raised around 3/4" from stock and I don't know if the 345 cc is too big or not. These heads were specially designed with the big bore motor, I just don't know if they are streetable or not.

I was going to go with a hydraulic roller cam, but have changed my mind. Seems a lot of guys are selling these and going to solid rollers.

Thanks a lot,
fast eddy

At 240 to 250 at .050 a hyd. roller is just fine.
Why bother with valve adjustments.
Also at 240 to 250 I would look at an AFR 305cc head.
I would not even look at heads any larger than the 305 cc AFR un-less you jump your cam up above 260 at .050.
I would run a flowed 850 carb.

Thanks for the advice u guys.

I wanted to go solid roller 'cause they rev higher and have less of a chance of valves floating. The valve adjustments I can handle, it's pretty easy to pull the valve covers off. At this point, I am pretty set on the solid roller.

What's wrong with the holley dominator intake? I guess I can run different intakes and see which one runs the best. I even have a dual plane team G intake, it's basically a weiand stealth.