[Fot] Headers

[Barr, Scott]

Based on my conversations with Susan's crew chief and head backhoe
operator, the use of a Stahl in a Spitfire also requires some pretty
good changes to the frame and right-side suspension upright.  The frame
lip on the right side of the engine has to be cut almost entirely away,
as well as much of the rear lip on the inner portion of the suspension
upright.  The frame may also need notching at the collector depending on
what collector you're using.

Scott (B.)
Headed for VSCDA's "Spring Break" weekend at Gingerman in 10 hours and
26 minutes.


-----Original Message-----
From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
Behalf Of spitfiresuz at 141.com
Sent: Thursday, May 03, 2012 2:15 PM
To: harmug at us.ibm.com; fot at autox.team.net
Subject: Re: [Fot] Headers

The Stahl is supposed to provide better flow but the bell housing needs
to be modified (ground down) to let it pass. We're running a Stahl right
now, and I have no quarrels with it. Just don't wrap it with header
tape--if you feel the need to do something to it for heat issues,
ceramic coating would probably be the way to go.

Keep Triumphing,

Susan     :)


Original Message:
-----------------
From: George Harmuth harmug at us.ibm.com
Date: Thu, 3 May 2012 12:42:45 -0400
To: fot at autox.team.net
Subject: [Fot] Headers


I was looking at the various Spit engines in the paddock but I forgot to
ask what kind of headers people were using. My car came with a set of
Tri-Y and I replaced them with a new set two years ago. My understanding
is these style help with low to mid range power. After getting passed,
at a very good clip, on the RA straights last weekend, I'm looking at
ways to get more power and still have the car SCCA H-Prod legal. Headers
/ exhaust system are one of the few areas where Prep level 2 engines are
given free range.

I'm thinking about a 4->1 style, like a Stahl, which I heard is better
for top end. Any input is appreciated.

thanks
mike

G. Michael Harmuth
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