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TR6 brake booster in race car

To: "FOT LIST" <fot@autox.team.net>
Subject: TR6 brake booster in race car
From: "BOB KRAMER" <rkramer3@austin.rr.com>
Date: Sat, 18 Oct 2003 18:31:22 -0500
Amici,
My TR4 came with H6 SU's on a long branch manifold. The PO even went so far as
to make a divet in the RF inner frenderwell to fit the longer H6's. I recently
replaced the manifold with an early short runner version and had a bung welded
in the middle of the cross tube for the connection to the TR6 vacuum booster
this car also has. I have never had a brake problem, but 2 weeks ago at Hallet
I found myself losing confidence in my brakes. I'm wondering if the reason the
PO used the long branch manifold is that he had the same problem with a short
one. Anyone have any experience with this combo of parts?

I also had some grease escape out of a rear seal on my Southwick axle and get
on the shoes. Nice brake lock up. I cleaned it up and it didn't recur.
Speaking of the axle conversion, I had an interesting problem. I was unhappy
with the performance of the Dunlop 205-60 D84J's so I switched to my Hoosier
TD's. The are mounted on Minilite type mag wheels. After torquing them down, I
had a session where I felt like I was floating. Not the best for lap times. I
found that the center hole in the wheels was too small to fit in the Southwick
axle and the wheels were not all the way on. They stayed tight, but flexed. I
guess it protrudes a little more than the stock axle.

Bob Kramer
rkramer3@austin.rr.com

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