RodsINTOMG wrote:
>
> In a message dated 98-04-15 12:25:33 EDT, you write:
>
> <<
> According to Butch Gilbert who has raced MGBs for donkey's
> years, the 3-synchro MGB gearbox is good for about 10 extra
> peak HP at the rear wheels compared to 4-synchro boxes.
> Rich Gordon at Trafalger spares speculated that the reverse
> should be true due to the 4-synchro box's bearing and shaft
> size. Could it be the size and weight of the flywheel
> that's really making the difference?
>
> I'm inclined to trust Butch, but am seeking more opinions
> before I pull the engine and start swapping gearboxes.
>
> Thanks,
>
> Andy
> --
>
> Andy,
>
> I have never heard the above before but I am inclined to agree with Trevor.
> Ten HP at the rear wheels is just too much. I can tell you a few things from
> my own experience with the 3 syncro vs. the 4 syncro. The 4 syncro is about
> 40 lbs heaver than the 3 or so I'm told. My experience with the 4 is that it
> is rather mushy and hard to shift in a hurry. The 3 syncro is very slick to
> shift and while not as bullet-proff as the 4 is easier to race. IAC both are
> easy to rebuild and there are parts.
>
> Rod Schweiger
>
Weight of flywheel will not make a hp difference since hp is measured at
steady rpm. Lighter flywheels make a difference on acceleration because
of less rotational mass to accelerate.
--
uncle jack the carfrek
TR4 Rallye Replica vintage racer
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