msd box and tac
Thread Starter
Staging Lane
Joined: Jul 2003
Posts: 54
Likes: 0
msd box and tac anyone have any problems hooking up a tac and a msd rpm box...just did one and the rpms on the tac (autometer) and the rpm box dont match the stock one. Not even near eachother. Stock one reads 800-900 autometer and msd box read 300-400
My experience It seems our LS1's put out a 4 cylinder tach signal. set the MSD box to the 4cyl setting and like on my autometer tach, you have to snip the 2 small looped wires in half to get the tach to read as a 4 cylinder vehicle. Your RPM's should match then
