[DeTomaso] Speciality Windsor exhaust gaskets?

[Göran Malmberg]

Presumed the heads are proffessionally ported and flow accordingly 
(concidering the cost), it would be very wrong not to use heders
to match, or else the heads wont work any better, or worse,  than suitable 
"header heads". If he can not afford specially built headers
I suggest modifying the first part, say 3 inches, of the header for a 
conical-taper shape. If not finding a suitable head gasket, the only
thing to do is buying gasket sheet and fabricate them, but you know that 
allready, dont you?
Goran.
----- Original Message ----- 
From: <MikeLDrew at aol.com>
To: <DeTomaso at realbig.com>
Sent: Sunday, January 28, 2007 6:28 AM
Subject: [Norton AntiSpam] [DeTomaso] Speciality Windsor exhaust gaskets?


> Hey guys (and especially Dan Jones),
>
> More parts-chasing for Stephane Bergeron.  He has a 550 hp 427-inch 
> stroker
> Windsor with a big fat roller cam, and heavily ported AFR heads.  He has 
> PI
> Motorsports headers.
>
> Here's the problem.  His heads have been heavily, extensively ported, so 
> that
> they measure 40mm wide and 38mm high, but the opening in the headers 
> measures
> 30 mm wide and 45mm high.  The cylider head ports are virtually square, 
> while
> the headers are very rectangular, and most notably, they are considerably
> narrower than the opening in the cylinder head.
>
> I am presuming that he can probably go to town with his grinder and open 
> up
> the headers a little bit, but I suspect he will hit air before he gets to 
> 40mm
> wide.  That may therefore require some extensive welding, filling, and 
> etc.
> and so forth.
>
> But here's the real question.  Conventional 351W header gaskets are
> rectangular, and roughly correspond to the size of the opening on the 
> header side,
> nowhere near that of the cylinder head.  My presumption is that the gasket 
> would
> therefore quickly blow out.  (see photo at:
> http://members.aol.com/mikeldrew/portedhead.jpg)
>
> Does anybody know of a specialized gasket formulated to match the contour 
> of
> his deeply ported heads?  From the photo it's evident that if the existing
> gasket was enlarged to match the width of the port, it would be 
> dangerously thin
> at the corners.
>
> What advice would you offer given his current situation?
>
> Mike
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