do rpm switches like msd turn back off when the rpm goes back down and what kind do you guys recommmend thnx

 

yes, RPM switches only activate so long as the set rpm is reached and/or passed. I use Harlan Engineering products in my car (rpm switch for VI, rpm switch for shift light, and I have a RPM window switch on order). I like em but he takes forever to get them to you. I think the MSD and others have to be modified to work on our ignitions. Good luck w/ your search.

 

The MSD switch must be modified for our cars. It will only allow nitrous to flow uring a set window of RPM"S i.e. 3000 to 6200 by the use of lills which are inserted into the switch.

Big Cracker