Scott, when these cars were made and timing specs were calibrated, we had almost
pure natural gas, now we additives for this and emission controls for this, and
carb cleaners and also = east coast & west coast specs for gas, so I think
timing
has to be done by running adjustments and whats good for "your" in your area,
and
leave the manual on the shelf. Also I think the manufactures spell it =pinking=
"FT"
scott suhring wrote:
> John:
>
> On my '70 TR6, if I set the timing at the recommended 12 degrees
> BTDC I get terrible "pinging" under heavey load. I get the best results
> if I retard the timing to 4 degrees BTDC. At this setting the engine
> pulls strong and little if any pinging (I use 93 octane).
>
> Has anyone else experienced this?
>
> Scott Suhring
> Elizabethtown, PA
> '70 TR6
>
> Johntr6@aol.com wrote:
> >
> > This i don't understand ( not only this....):
> > I've had trouble timing my engine to specs since I replaced cam several
>years
> > ago (along with a valve job). Today I tried again, starting by timing
> > statically to -12 degrees by the test lamp method described in Bentley.
>When
> > I then put timing light on the marks, it still reads -12. Whats up with
>that?
> > Idle remains rough, but at higher revs things seem pretty good.
> > Furthermore, I'm still chasing an apparent vacuum leak. I just replaced the
> > manifold
> > gasget and retorqued all carb bolts. I still don't get enough vacuum to
> > operate the vacuum retard device, although now I can feel some under the
>rear
> > carb where the vacuum hose connects. The hose appears clear...at least i can
> > blow through it. Any ideas on this?
> > Thanks, John
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