[Fot] Spitfire Clutch

[Mike Harmuth]

Hi Bob, I missed the original post. I run an Aluminium flywheel with a
stock clutch and modified pressure plate from Ted at TSI 72 MK4 spit on my
small journal MK3 engine (10 spline).  I have a highly modified early Spit
gearbox with TR8 gears inside (a Quantum Mechanics special). I use the
later clutch because the flywheel for a MK3 isn't available but it is a
larger diameter (7.25"  vs 6.5" ). I do 6- 8 weekends a year and normally
pull the engine at the end of the season for a refresh. The clutch disks
look OK after a season but I change them anyway, they aren't expensive.

I did buy a Tilton based clutch and flywheel set up from Joe Siam
(Checkered Flag Racing) before he closed up shop but I haven't put it in
yet. My big concern with the Tilton is it's a solid center disk and that's
not the best setup for vintage parade laps (at least one event a year) but
I wanted to have Plan B ready if I start blowing up disks. Again, that
hasn't been a problem with road racing, unlike the abuse off the line you
AutoX guys put on the drive train.

mike h
Tilton Set up
[image: P1015092.JPG]
[image: P1015093.JPG]


On Fri, Oct 2, 2026 at 11:39 PM robertten1 at aol.com <robertten1 at aol.com>
wrote:

> Good evening members,
>
> I am having an issue with the clutch on my Triumph Spitfire.  Slippage.
> It's a stock pressure plate and disc in a 1500 engine mated to a GT6
> transmission.
> My quest is acquire a heavy duty pressure plate or info for a company that
> can rebuild modify my pressure plate.  Company I have used in the past has
> long gone out of business.  Our parts suppliers seem to of stopped offering
> performance clutches over the years.  Unless anyone or more of our members
> can offer suggestions of help ?
> I have tried asking Spitfire racers their sources but have not received an
> answer.
>
> Curious,
> Bob Totten
> Autocrosser
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage <http://www.team.net/pipermail/fotUnsubscribe/Manage>:
> http://autox.team.net/mailman/options/fot/ofracer@gmail.com
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/fot/attachments/20261008/e9765394/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: P1015092.JPG
Type: image/jpeg
Size: 2541646 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/fot/attachments/20261008/e9765394/attachment-0002.jpe>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: P1015093.JPG
Type: image/jpeg
Size: 2269390 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/fot/attachments/20261008/e9765394/attachment-0003.jpe>