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72 corvette heads, manifold, and camshaft questions

General engine tech -- Drag Racing to Circle Track

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Tuner
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Re: 72 corvette heads, manifold, and camshaft questions

Post by Tuner » Fri Nov 22, 2019 10:40 am

sowen57 wrote:
Fri Nov 22, 2019 9:47 am
I have the stock dual snorkel air cleaner, I may try to route cold air to the snorkels, also it has the tach drive distributor, which I will rebuild and convert to electronic ignition, any favorites Hays, Pertronix?
Pertronix 1181, the one with the magnets in the ring below the mechanical advance and rotor. The new 1181LS, LS = lobe sensing, is easier to install but has less dwell, so the regular 1181 is better at high RPM.
https://www.speedwaymotors.com/PerTroni ... ,5399.html

autogear
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Re: 72 corvette heads, manifold, and camshaft questions

Post by autogear » Fri Nov 22, 2019 11:30 am

Aren't the house-brand heads by either Jegs or Summit produced by Profiler? They should have a 180 head if you were willing to go that small. Buy em bare and have em loaded up with parts from competition products if you like; or just take the complete heads to your favorite engine builder to check the guides,seats, etc. Just make sure that the springs you use are appropriate for the cam you decide on. At your RPM, there won't be much gain or loss with any low-rise QJ manifold.

sowen57
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Re: 72 corvette heads, manifold, and camshaft questions

Post by sowen57 » Thu Nov 28, 2019 1:52 pm

Can anyone tell me about the house brand Jeg's or Summit heads? What cross section size and valve size heads do I need, for this build to rev to 5800 to 6000 RPM? What about some cam recommendations for the 3.08 gears and TH400 I will buy whatever converter is needed for it. Do you guys have a favorite street converter builder? Not fond of TCI as they screwed me before and I won't spend money with a company that won't stand behind their products. I was wondering if the AFR heads would leave me some room to grow or would they really be too big for a mild 383?

BillK
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Re: 72 corvette heads, manifold, and camshaft questions

Post by BillK » Sat Nov 30, 2019 9:31 am

Belgian1979 wrote:
Thu Nov 21, 2019 4:50 am

What is the problem with an oil ring support on a street engine ?
Cant say for sure that there is but I prefer not to use them if at all possible. One more thing to move around and affect ring sealing even though the oil ring is not as critical as the others. Simply personal preference like I said.
Bill Koustenis
Advanced Automotive Machine
Waldorf Md

www.enginerepairshop.com

sowen57
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Re: 72 corvette heads, manifold, and camshaft questions

Post by sowen57 » Sat Nov 30, 2019 12:30 pm

Bill K, I agree as
Forrest Gump would say "one less thing."

sowen57
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Re: 72 corvette heads, manifold, and camshaft questions

Post by sowen57 » Sat Nov 30, 2019 12:35 pm

Thanks tuner, 1181 Pertronix line along with their coil. Anyone ever use the crane unit and is it still available?

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Re: 72 corvette heads, manifold, and camshaft questions

Post by 77cruiser » Sat Nov 30, 2019 2:41 pm

I thought Jegs was selling Profilers with the Jegs brand on them. Used to be Canfield but they've been gone for a long time.
Jim

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