v-6 tach with V-8 AND MSD 6AL
Guest
Posts: n/a
v-6 tach with V-8 AND MSD 6AL
ok i know that when you use the v-6 tach on a v-8 motor the tach will be off... but when you install a MSD 6AL box you have to plug the tach into the box its self not into the HEI unit... so will this make the V-6 tach give me the right reading?
PS this was done to a 91 Firebird... stock was a 3.1L MPFI with a 120mph spedo i swaped in a carbed 350 non computer controled
PS this was done to a 91 Firebird... stock was a 3.1L MPFI with a 120mph spedo i swaped in a carbed 350 non computer controled
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
No. It will read wrong.
The 6-cyl distributor gives 3 pulses per crank rev, and that's what the tach is calibrated for. The V8 dist gives 4 pulses per rev. So no matter what box you have or where you hook it or whatever, a 6-cyl tach will still read 33% higher than reality when hooked to a V8.
The 6-cyl distributor gives 3 pulses per crank rev, and that's what the tach is calibrated for. The V8 dist gives 4 pulses per rev. So no matter what box you have or where you hook it or whatever, a 6-cyl tach will still read 33% higher than reality when hooked to a V8.
Thread
Thread Starter
Forum
Replies
Last Post
RedLeader289
Tech / General Engine
10
May 28, 2019 01:47 PM