[DeTomaso] Fw: Re: Intake gaskets

[Will Demelo]

Hi Dan.
I'm building a cold air intake system for my IR setup. I got intake temp 
readings of ~175 deg on a 75 deg day.
I've read that rule of thumb is 1% HP increase for every 10 deg of intake 
temp reduction.
True?
Will
----- Original Message ----- 
From: "Daniel C Jones" <daniel.c.jones2 at gmail.com>
To: "Pantera REALBIG forum" <detomaso at realbig.com>
Sent: Friday, December 03, 2010 3:00 PM
Subject: Re: [DeTomaso] Fw: Re: Intake gaskets


>> A while ago Ken Green and I were speculating that the turkey tray
>> would keep a non-airgap intake cooler (and the charge happier) even
>> with the exhaust crossovers blocked?
>
> Possibly but there are other places you'll want to address to
> keep heat transfer to a minimum.  Vizard's latest book (an
> entirely new version of "How to Build Horsepower") has a good
> example of the effect of cold air induction.  The engine tested
> is an EFI 5.0L Ford.  The runners were Extrude Honed (smooth
> surfaces transfer less heat, not necessarily a good move for
> a wet flow carb intake) and a C&L cold-air kit with K&N filter
> drawing air from the fender was fitted.  The outside was coated
> with zirconium oxide and the inside of the runners were coated
> with a thermal barrier. A splash tray was fitted and filled with
> structural foam and the heat passage in the throttle body spacer
> eliminated.  Baseline was with the C&L cold air intake system
> and the Mustang ran the 1/4 mile in 13.67 seconds @ 99.62 MPH.
> After Extrude Hone, that improved to 13.51 seconds @ 101.01 MPH.
> With the thermal management applied, the results were 13.07
> seconds @ 104.31 MPH.  On the dyno, the improvement was 44 HP
> and 35 ft-lbs.  That's quite an improvement.
>
> Cold intakes made better power on the dyno 351C compared to
> heat soaked ones.  Keep in mind this is open air dyno which
> keeps the engine cooler than a vehicle's engine compartment.
>
> Dan Jones
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