Another carb related possibility is that one of the carb
pistons isn't raising when the throttle is opened.
That's easy to check with the airfilters off just by reving
engine and watching the carb pistons raise when the
throttle is opened. They should raise equally
and in unison for any particular rpm.
Let us all know what you find.
Cheers,
Bill Sohl
> From: "Roger Beasley" <beeline@iline.com>
> Matt,
> I once had a similar problem. It turned out that the linkage was slipping
> so that only one carb was opening. The manifold balance pipe was allowing
> the back two cylinders to get some mixture so low RPM torque was fine, it
> just didn't want to rev much. Have someone step on the throttle pedal while
> you look into the carbs to make sure the butterflys are opening.
>
> Just a possibility.
>
> Roger Beasley
> #75 Vintage TR4 Racecar
>
> ----- Original Message -----
> From: Matthew Wilder <mwilder@top.monad.net>
> To: <fot@autox.team.net>
> Sent: Tuesday, April 11, 2000 1:40 PM
> Subject: Seeking technical advice and thanks
>
>
> > Last Sunday was my first auto-x with my recently finished TR4a and it
> > functioned resonably well for having been finished the day before. I'd
> > like to thank this list and expecially Bob Lang for your help and
> > inspiration. (where's that tr6 Bob?)
> >
> > Now the question. When taking a run the motor seems to run out of go
> > above 3000 or so rpm's. I'm runing SU carbs and Bob L. who was helping
> > noticed there was no oil in them (the one job I left to my brother) The
> > plugs are light tan to a little to white for comfort. I'm running the
> > "D" cam and an ignitor ignition with MSD box (6000 rpm rev limit) Facet
> > cheapo fuel pump, ll to 1 or so compresion.
> >
> > Any sugestions of where to start? Seems to run great of the line then
> > quickly goes into slow mode.
> >
> > Matt W.
> > 67 TR4a E-prepared auto-xer
>
>
|