If the tach is a Smith's, similar to your TR3, then a Stag tachometer looks
much the same and is calibrated for an 8 cylinder.
8 cylinder engines weren't exactly common among british vehicles during the
years Smith's instruments were in common use.
TeriAnn Wakeman wrote:
> I currently have a car with a four cylinder engine. I have a neg. earth
> MGB tach counting the revs.
> The engine will very soon be replaced by an 8 cylinder engine ("Dr. X
> will build a creature"). I'm assuming that the MGB tach would read twice
> the actual RPMs. How hard would it be for a gauge shop to convert the 4
> cyl tach to an 8 cyl tach?
> Alternativly. Where might I source a Smiths/Jager 8 cyl tack that is the
> same size and looks similar to the MGB tach?
> Dr X
> (No this will NOT be going into a TR3)
The Wyvern - '57 TR3, TS15559L - http://www.merlingroupinc.com/tr3.htm
The Hippogrif - '71 Stag MKI, LE8176E - soon to get a site of it's own