The MSD Enhancer CD Ignition has a built-in user
adjustable rev limiter which offers an adjustable rpm
range from approximately 6,300-8,500 rpm. This rev
limiter has a MSD factory pre-set of approximately 8,000
rpm. However, before mounting the ignition into the
electrical box, you may adjust the rev limiter to your
desired rpm.
1. Using an 8mm wrench, back off the lock-down nut
on the potentiometer shaft. With a small flat blade
screwdriver you will now be able to turn the pot shaft
freely.
2. To increase the rpm of the rev limiter, turn the
potentiometer shaft clockwise. One full clockwise
rotation will give you the maximum rev limit available,
approximately 8,500 rpm.
3. To decrease the rpm of the rev limiter turn the pot shaft counter-clockwise. One full rotation will
give you the minimum rpm limit of approximately 6,300 rpm.
4. Once you have set the rpm limiter to your desired setting, tighten the lock-down nut on the
potentiometer shaft (using the 8mm wrench and the screwdriver to hold the shaft in place).
This will prevent the rev limiter from changing rpm.