Custer County Mud Draggers Forum

So is msd allowed in stock class, or is it considered aftermarket? Thanks

getrhythm Wrote:unless u are running the distributor that is msd with the rev limiter built into it.

The above quote from getrythm is not true. It has to be a factory distributor. You can however add a rev limiter to it.

Floating valves ain't good. The idea is to limit the rpm so you don't float the valves and end up running one into the piston or bend a push rod. Stock EFI engines in these classes have rev limiters built into the PCM for this purpose. So if a guy wants to add a rev limiter to protect his carbureted engine, we let him. Rest of the ignition system better be stock though.

If you're like me and you've ever had a driveline let go or xfer case jump out when your racing, it seems to take forever for your brain to tell your butt cheeks to unpucker and let go of the foot pedal you've got planted to the floor. Rev limiters are handy in such a case.

;-)