Fw: [DeTomaso] Intake Manifolds

[Will Demelo]

<<Of course he was using CHI
heads so it was a better match than the Yates to begin with.>>
I purchased the 3V 218 CHI's and matching intake. The ports weren't even 
close.
My builder charged me some big $ to match port them. Needless to say I was a 
little pissed.
I contacted Jon at CHI and he told me there was no need to match port. Kaase 
got lower #'s after he matched them while testing.
I forwarded the info to my builder and he still said it was BS. I find it 
hard to beleive myself, but that's what CHI said.
Dan, your comments?
Will

----- Original Message ----- 
From: "Daniel C Jones" <daniel.c.jones2 at gmail.com>
To: <detomaso at realbig.com>
Sent: Thursday, November 02, 2006 4:11 PM
Subject: Re: [DeTomaso] Intake Manifolds


>> I'm just curious how much of a difference one intake will have over
>> another.
>
> It may not be all that much.  You're comparing several good intakes
> against each other on heads they aren't necessarily matched to.
> In a previous dyno test that I lent intakes too, we found a bigger
> difference in going from a stock Holley to a tuner Holley (stock Holley
> was too small).
>
> You may want to consider testing a plenum divider in the Edelbrock A331.
>
>> In addition to the A331's you already have, I have both B351 and D351
>> intakes here.  To my eye, there isn't much difference between the A331
>> and the B351 (both Roush versions).  The primary difference is the A331
>
>> Dan - on your intake writeup, you have a picture of a C351 intake.  It 
>> looks
>> very different from an A331.  The runners look larger, longer, and more
>> spider shaped.  In short, it looks more like a Strip Dominator.
>
> The runner slopes on the C351 are closer to a Strip Dominator than the
> A331's are.  Viewed from above, the exit angles are different.  The
> C351's end runners go straight before gently curving towards the head
> ports.
>
>> Also - the
>> plenum from the outside looks very different.  I realize that it's the
>> inside that matters, but I can only guess from the outside pics.
>
> The C351/D351 plenum is closer to a Strip Dominator than the
> A331/A351/B351.
>
>> The later intake looks powder coated in a gray/aluminum color.
>
> All the castings I've seen out of Australia have had excellent quality
> except for the Funnelweb.  It wasn't so nicely finished and it's fairly
> heavy for an aluminum intake.
>
>> I've also considered the TFC/CHI intake
>
> To this aero engineers eyes, the CHI intake looks very well designed in
> the plenum area.  I might be able to lay my hands on for a test.  The
> guy running the dyno has one from his Engine Masters entry.  When Kaase
> won with the EMC with his Cleveland, he tested a Yates intake against
> the CHI intake and the CHI part was better.  Of course he was using CHI
> heads so it was a better match than the Yates to begin with.
>
> Dan Jones
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