[DeTomaso] Fw: Aluminum Exhaust Gaskets

[Dan Mixon]

Summit Racing carries them. Percy's High Performance.

http://store.summitracing.com/partdetail.asp?autofilter=1&part=PHP%2D66052&N
=700+400251+4294908331+4294886211+115&autoview=sku 

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Will Demelo
Sent: Friday, December 26, 2008 3:14 PM
To: detomaso at realbig.com
Subject: [DeTomaso] Fw: Aluminum Exhaust Gaskets

Chris,
Where did you get your header gaskets? How long have they lasted for you?
Will
----- Original Message ----- 
From: "Chris Difani" <cdifani at pacbell.net>
To: "Bob Timma" <ddbt10 at msn.com>; "detomaso" <detomaso at realbig.com>
Sent: Friday, December 26, 2008 3:24 PM
Subject: Re: [DeTomaso] Aluminum Exhaust Gaskets


> Bob:
>
> There's two ways (that I'm aware of) that aluminum has been used for 
> gaskets in that application. In both instances, the aluminum is pure 
> aluminum, not any of the alloys like 6061, or 2024, and so forth. Not only

> does it need to be pure aluminum, it also has to be what's called "dead 
> soft", or fully annealed.
>
> The first way has been as a single layer of aluminum. This application 
> requires that both surfaces be machined such that they're flat, and 
> smooth. That's "flat" in the machinist point of view, like flat to within 
> one half of a thousandth of an inch across 12 inches of surface. Smooth 
> needs to be to the same definition. Since aluminum, even pure, and "dead 
> soft" isn't nearly as pliable as the usual gasket material, the user must 
> take unusual care not to exceed the gasket's 'sealing' capabilities.
>
> The second way I've used aluminum gaskets, is as a series of layers of 
> aluminum. Almost like aluminum foil. My header gaskets are made up of 20 
> layers of formed pure, "dead soft" aluminum sheets. Each of the layers are

> formed to the exact outline, and profile, then all the foils are attached 
> together at 3 or 4 points across the entire gasket. The idea is that as 
> the bolts are tightened up, the aluminum will pressure-form to fit the two

> faces (header flange, and head).
>
> The header gaskets that I have are labeled "the last header gaskets you'll

> ever have to buy", and from my experience, I've got to agree with their 
> advertising. The collector gaskets I'm using are copper, rather than 
> aluminum... so I can't speak to that particular application.
>
> Hope this helps,
>
> Chris
>
> Chris Difani
> '73 L #5829 "LITNNG"
> The Electric Pantera
> Sacramento, CA
> Email: cdifani at pacbell.net
>
>
>
----------------------------------------------------------------------------
----
>
>
> ----- Original Message ----- 
> From: "Bob Timma" <ddbt10 at msn.com>
> To: "detomaso" <detomaso at realbig.com>
> Sent: Friday, December 26, 2008 12:06 PM
> Subject: [DeTomaso] Aluminum Exhaust Gaskets
>
>
>>
>> Anybody have any expirence with aluminum exhaust gaskets? I'm looking at 
>> making some for the headers to block and colectores to exhaust pipe. I 
>> have a surplus of .090" thich aluminum.Bob T.#3952
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