Ljbtvr@aol.com wrote:
>
> RE: Header on 6 cylinder, JET HOT, hot starter
>
> When I was autocrossing my GT6 after a couple of runs the starter got so much
> heat off the header (which ran right under it) that it wouldn't turn over. I
> solved
> the problem by getting a small piece of what we in the construction industry
> call
> "ductboard". It's metal foil on one side and fiberglass insulation on the
> other. It
> is used in forming air duct without sheetmetal.
>
> I cut a length of it as long as the starter and wide enough to go all the way
> around. Then I made V grooves in the fiberglass (it's stiff and can be cut
> with a
> sharp knife) so the board would bend around the starter. It was only about
> 3/4"
> thick so it would slide around the starter body, reflective side out. I tied
> it on
> with a piece of stranded copper wire stripped of its insulation. A notch was
> cut
> in to keep the foil away from the positive cable.
>
> All of this was before I discovered header wrap. I used the wrap on my TVR's
> header- mainly to cut down on under-bonnet heat. It was a lot more expensive
> than the ductboard though. I think I used more than one roll of the stuff
> and
> wrapped it back to the first pipe connection. If I was to do the job today I
> probably would go for the JET HOT treatment even with the higher cost
> because I hear the wrap will shorten the header life.
>
> At least the ductboard job can be done on a GT6 with the header in the car- I
> don't know if this could be done on a TR6 though. Both the JET HOT and
> wrap are best done with the header off (although I did the wrap job with my
> header on, the engine on a stand, and the intake on.
>
> Larry Bickel
> ljbtvr@aol.com
> Lancaster, PA
> '68 GT6, my sleeping racer
> '71 TVR 2500, my street car and sometimes racer
> '85 Dodge Van
> '83 Chevy S10
> '80 Yamaha 650
>
This sounds like a good idea for the TR3 generator also. Since it sits
so close to the exhaust manifold, the rear bearings tend to have a
shorter life.
George Richardson
'57 TR3, TS15559L
(still in the works)
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