Re: 3.9L cylinder head work

From: Bernd D. Ratsch (bernd@dodgetrucks.org)
Date: Sun Apr 01 2007 - 19:41:55 EDT


Ah yes...those little "anti-reversion" HP gaining grooves you put into
the manifold or exhaust ports. It's a nice idea...but unless someone
has done some serious dyno testing with them for each specific engine
combination...i'd stay away.

I remember some of the LS1 people talking about them claiming 10-20HP
more...but that was after also porting work and milling on the same
heads...no proof that the grooves actually worked.

- Bernd

Josh Battles wrote:
> Do you have any experience with the Singh grooves?
>
>



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