Shift light for 5 cyl?

[Huw Powell]

> I've been wanting a 'shift light' for my CGT, since the Momo steering
> wheel effectively blocks the view of the most important portion of the
> tach. Autometer makes a nice, unobtrusive little one I could stick
> somewhere for my track days and solo events. The problem, as always, is
> they are made for "4, 6 or 8 cyl".  Since they are triggered by ignition
> impulse for a single plug, I'm wondering if I can't just set it for 4cyl
> and add 25% to get the rpm limit I'm looking for?  (i.e. 4 cylinders =
> 100%, therefore one more would be another 25%).

well... if they are triggered by one plug pulse, the 4/5/6/8 thing
doesn't even matter - since one pulse = one revolution, right?  If it
runs off a coil signal, however, it must do the dividing and your theory
sounds correct.  In fact the one with the adjustable knob could just be
set  empirically, who cares how many cylinders it thinks you have, just
set it go off at whatever tach indication you like.

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/