I looked into TT when researching TACHS. Go ahead! Find a tach for a three cylinder diesel that won't cost near the price
of the engine
. Options are limited to sending units, alternator mods to gain control wire and mechanical connections; if available.All rather pricey.
Apparently, the TT has issues with weather
, moisture and longevity..; besides being small and guard to read from half a 'pit away..
I ended up purchasing
a laser "timing light" type on sale
at HF and checking the RPM
at a couple of sweet spots. While not specifically accurate; not worse than reports of other types being off some
I'll eventually get 'round to a proper attach in the panel; but not while other stuff needs doing.