Shawn,
I think you're right on. At least in my case metal fatigue was in play with
the diff crossmember as the split in the "arm" toward the top of the
crossmember looks like a combination of rust/corrosion and constant added
stress on the thin metal, like bending metal back and forth to break it.
The new crossmember is heavy guage steel box 2" x 2" and should outlast the
rest of the frame. Maybe eventually I'll be able to do a frame off and by a
new frame from my friend Tony at RATCO
Regards,
Seth
----- Original Message -----
From: "Shawn J. Loseke" <sloseke@holly.colostate.edu>
To: "Foster, Stan" <stan.foster@hp.com>; "6pack" <6pack@autox.team.net>;
"Seth Glassman" <superchargedtr6@gmail.com>
Sent: Saturday, October 21, 2006 5:09 PM
Subject: RE: Engine upgrade vs supercharging
> >===== Original Message From "Foster, Stan" <stan.foster@hp.com> =====
>>Seth, thanks for the insight. I'm surprised that adding the supercharger
>>is
> having such a dramatic affect on the chassis. I know these are
> traditionally
> weak areas anyway but I was expecting that adding the SC would bring the
> unit
> up to the same level that the early PI TR6 was (150hp) and no major mods
> would
> be needed to an otherwise intact frame. I may have to reconsider that as I
> plan to take the diff out for a refurb this winter..
>>
>>Stan
>>
>
> Stan, remember that the newest factory chassis is now thirty years old.
> Metal
> fatigue can be coming into play here as well as thirty years of exposure
> to
> moisture etc... So even if the frame looks solid, its probably not as
> strong
> as the day it left the factory. Many shops in England that uprate the
> power of
> TR6's and build 'fast road' cars, are finding that they also have to
> reinforce
> the chassis in the differential area. Not just the mounts for the diff but
> also the crossmember tube shock conversions. Something more and more
> people
> are finding necesarry here in the states as well. The extra barcing isn't
> much, and if you already have the diff out then it's even easier to
> accomplish. The frames do not have to be seperated from the body to
> accomplish
> these re-enforcements.
>
> Shawn J. Loseke
> Fort Collins, CO
> http://www.triumphowners.com/79 (1972 TR6)
> http://www.triumphowners.com/690 (1978 TR8)
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