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-   -   Thoughts on accepted aftermarket heads for 350? (https://classracer.com/classforum/showthread.php?t=69084)

Bobby Lundholm 02-22-2018 04:52 PM
Re: Thoughts on accepted aftermarket heads for 350?
 
Quote:
Originally Posted by 5389stk (Post 556830)
Stock runner must be same size as head it is replacing. According to stock head cc guide sub notes on replacement heads
That's what the question is on how to get there without it being illegal.

terry1 02-22-2018 04:58 PM
Re: Thoughts on accepted aftermarket heads for 350?
 
I figured that that would be the case.
So, if I have a set of aluminum heads that are 168 CC's on the intake;
that says that NHAR does not care how it is done as long as it is
"stock in appearance"!
That says to me that NHRA are saying "go at it boys" and see how good
you are!
Terry K

Bobby Lundholm 02-22-2018 05:10 PM
Re: Thoughts on accepted aftermarket heads for 350?
 
Quote:
Originally Posted by terry1 (Post 556833)
I figured that that would be the case.
So, if I have a set of aluminum heads that are 168 CC's on the intake;
that says that NHAR does not care how it is done as long as it is
"stock in appearance"!
That says to me that NHRA are saying "go at it boys" and see how good
you are!
Terry K
Right or run it as it is with the 185cc runners. Either way it's technically illegal.

Mark Faul 02-22-2018 05:25 PM
Re: Thoughts on accepted aftermarket heads for 350?
 
Quote:
Originally Posted by Chris Hardy (Post 556820)
Wouldn't it be easier for everyone, if NHRA just calls it: Every SBC head must be Less than or equal to 185CC's, have stock diameter valves? Then they just inspect for grinding and pour? We all make a ton of power, and inspection is easy. (FYI, the pinch cross section on the Dart 185cc heads are smaller than the stock intake manifold cross section) Thus, the heads will be a substantial gain once a good valve job and flowing is completed.
They already have a class where they pour the heads and have stock valve diameter. It's called Super Stock.
Sure glad I decided to quit running Stock. Getting more screwed up every year...

Dan Fahey 02-22-2018 06:25 PM
Re: Thoughts on accepted aftermarket heads for 350?
 
Quote:
Originally Posted by Mark Faul (Post 556836)
They already have a class where they pour the heads and have stock valve diameter. It's called Super Stock.
Sure glad I decided to quit running Stock. Getting more screwed up every year...

Holy Crate Motor Batman !! :D

We just had this conversation.

D

Barry Polley 02-22-2018 08:57 PM
Re: Thoughts on accepted aftermarket heads for 350?
 
Quote:
Originally Posted by Mark Faul (Post 556836)
They already have a class where they pour the heads and have stock valve diameter. It's called Super Stock.
Sure glad I decided to quit running Stock. Getting more screwed up every year...

My partner Jeff said; its like comp 25 years ago!

FLEMING 02-23-2018 07:31 AM
Re: Thoughts on accepted aftermarket heads for 350?
 
Quote:
Originally Posted by Greg Hill (Post 556756)
The Edlebrock heads are 185 cc’s on the intake runner. Who approves this stuff?

I saw that! I think i will just look for some 993 I just want to fix a legal motor lol


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