BB Chev heads intake and cam questions

[Greg Marshall]

Going to freshen up my 402 67 camaro street strip car with turbo 400 411 with locker it has a set of 3872702 heads and torker intake with hydraulic cam i don't know the spec until its apart. The guide says these heads are 66 oval port 396 427 98cc are these heads worth using ? Also would a 359 intake be a better choice then the existing Torker? Any suggestions on a stout cam for this combo since it will be apart anyway

any info would be appreciated as i dont know anything about BB chevs

cheers
greg

[Doug McCue]

You have a PM

[Alan Roehrich]

This thread should probably be in the tech section.

A 359 is a rectangle port intake. These days, with the number of quality oval port intake manifolds, there is no real reason to use a rectangle port intake with oval port heads. An Edelbrock Performer RPM Oval Port Air Gap intake would be a good choice.

Those heads are fine. They will likely be closer to 101 or 102cc, if not a little bigger. You could upgrade to 2.19" intake valves, with some bowl blending and decent porting if you wanted, for most street cars, putting the 1.88" exhaust valves in often isn't worth it, given the small bore and closed chamber. In fact, the 1.725" valve and smaller port usually helps velocity, and there are a lot of Stock Eliminator cars making 600+ HP with 1.725" exhaust valves.

Provided you have the right converter, I'd probably be looking at Comp Extreme lobes, and a custom grind 224 to 232 @ 0.050" on the intake, and about 8 degrees more duration on the exhaust than the intake, on a 108 or 110 LSA. You can run solid, hydraulic, solid roller, or hydraulic roller.

It's not a problem to get over 500HP out of a 402 like that on pump gas, even with a hydraulic flat tappet cam.

[Greg Marshall]

Thanks Alan for the information, i now know the heads will work with a good bump stick and intake. Thanks for the PM Doug

[Alan Roehrich]

Originally Posted by Greg Marshall

Thanks Alan for the information, i now know the heads will work with a good bump stick and intake. Thanks for the PM Doug

They will, provided the right person does the right work on them. You cannot take them just anywhere. You need 10.5:1 compression to make a good cam work well in that combination. I suggest setting the deck clearance to 0.00", using a 0.042" thick 4.200" bore head gasket and milling those heads around 0.020".