3V heads (was Re: [DeTomaso] 2V heads0

[adin at frontier.net]

Thanks for taking the time - I'm just trying to learn some stuff.

cheers,


Quoting Daniel C Jones <daniel.c.jones2 at gmail.com>:

>> The CHIs are winning the goodies @ EMC, but not producing lower
>> ETs.  Why?
>
> I don't know for sure but my guess is the guys not improving with
> the CHI heads are starting off with well sorted 4V combinations.
> They slap on a set of CHI heads and matching intake with no other
> changes and don't go any faster.  It may be that the combination
> isn't as well suited.  Also, realize that 4V heads with a little
> short side radius work and good valve job flow about the same as
> the CHI's out of the box.  The smaller port areas of the CHI's
> should help at lower RPM but drag racers may never operate below
> 5000 RPM.  It's also possible their combinations are being limited
> by some other factor, say fuel pump flow or carb CFM or any of a
> number of things, so the potential of the CHI heads are not being
> realized.
>
> Dan Jones
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