Good question. The TB/TC/early TD cam definitely has longer duration than
the late TD/TF cam. It's the late cam that has the noticeably pointier
lobes. I suspect Jarl wrote "later" when he meant "early". because the
rest of what he said is correct. You can't regrind a late cam to the
early specs.
On Mon, 9 Sep 2002, Bullwinkle wrote to mgt and mgtabc:
> Jarl:
>
> How does your response fit in with one from Skip from an
> earlier thread?
>
> <<<snip>>>
> Blake:
>
> One way to tell the difference is that the .012 cam has
> sharp "pointy"
> lobes. The others are more rounded.
>
> Skip Kelsey............................................
> <<<snip>>>
>
> Jarl or Carol wrote:
> >
> > Fuggeddaboudit!
> >
> > The later cam has a broader tip of the lobe (longer duration) and you
> > would either end up with a MUCH smaller lobe (and screw up the rocker
> > geometry) or have to weld up all 8 lobes - which doesn't work for more
> > than about 3000 miles!
> >
> > Jarl
> --
> Blake
--
Chip Old 1948 M.G. TC TC6710 XPAG7430 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO CT3479E
fold@bcpl.net
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