Edelbrock CJ heads

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Edelbrock CJ heads

Post  Scott Foxwell on September 14th 2017, 5:11 pm

Will a 2.30 intake valve fit in the Edelbrock CJ heads?

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Re: Edelbrock CJ heads

Post  rmcomprandy on September 14th 2017, 7:00 pm

Scott Foxwell wrote:Will a 2.30 intake valve fit in the Edelbrock CJ heads?

As long as you downsize the exhaust valve diameter slightly.

The intake seat inserts in the heads I had a while ago were 2 5/16" O.D.

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Re: Edelbrock CJ heads

Post  Scott Foxwell on September 15th 2017, 8:23 am

rmcomprandy wrote:
Scott Foxwell wrote:Will a 2.30 intake valve fit in the Edelbrock CJ heads?

As long as you downsize the exhaust valve diameter slightly.

The intake seat inserts in the heads I had a while ago were 2 5/16" O.D.
Thanks Randy. Is there a better "conventional" head that I could get a 2.30 intake valve in?

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Re: Edelbrock CJ heads

Post  rmcomprandy on September 15th 2017, 9:59 am

Scott Foxwell wrote:
rmcomprandy wrote:
Scott Foxwell wrote:Will a 2.30 intake valve fit in the Edelbrock CJ heads?

As long as you downsize the exhaust valve diameter slightly.

The intake seat inserts in the heads I had a while ago were 2 5/16" O.D.
Thanks Randy. Is there a better "conventional" head that I could get a 2.30 intake valve in?

Maybe the Trick Flow 325 but, I know you can put even a 2.350" valve in a Blue Thunder.

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Re: Edelbrock CJ heads

Post  torino501 on September 16th 2017, 3:06 pm

can I ask why... I didn't think the e-heads had enough port volume too use a valve that size... just curious

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Re: Edelbrock CJ heads

Post  rmcomprandy on September 16th 2017, 5:40 pm

torino501 wrote:can I ask why... I didn't think the e-heads had enough port volume too use a valve that size... just curious

I will say that valving the size cylinder and RPM range for the velocity going past the valve seat is just as important so, just let the port size fall wherever it may and don't spend time worrying about whatever things you have no control over.

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Re: Edelbrock CJ heads

Post  Lem Evans on September 16th 2017, 9:42 pm

Scott Foxwell wrote:Will a 2.30 intake valve fit in the Edelbrock CJ heads?

Why would one?

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Re: Edelbrock CJ heads

Post  IDT-572 on September 17th 2017, 1:48 am

Valve area, bowl, and short turn are the hardest place to get air through. The port velocity will pick up and flow what it needs too. So long as it doesn't choke.
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Re: Edelbrock CJ heads

Post  torino501 on September 17th 2017, 10:30 am

Since we are on the subject of the CJ e- head why in the hell do 2 of the 4 intake port have that hedious bulge by the push rod pinch area? Only 2 of the 4.. looks is would affect flow on those 2 ports

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Re: Edelbrock CJ heads

Post  Scott Foxwell on September 17th 2017, 12:12 pm

torino501 wrote:can I ask why... I didn't think the e-heads had enough port volume too use a valve that size... just curious
These heads have been worked pretty extensively, from what I've been told. Customer already has a fair amount invested, he just needs more valve area for the combination. It has nothing to do with port volume, it's about cross sectional area and for the combination, the port has enough, just needs more valve. It may not be the most practical answer. Just gathering information at this point.

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