Best way to set timing

[JSchlachta]

What is the best way to set timing advance. ?? I set it the 1/8" for a while and then bumped it another 1/8 inch and runs much better top end. Anyone no how far to go??



Thanks,

Jim

 

[dpuckett]

It depends on your pump. Your best bet is to set it with a dial indicator. I have had trucks in which moving 1/8" went from 1. 4 to 2. 0; others, the 1/8" took it right to 1. 5mm, so its really a crapshoot.



Daniel

 

[NIsaacs]

Make sure your KSB is working, then advance until you get a faint rattle on light acceleration when engine is cold. The rattle will go away when the engine warms up and KSB kicks off.





"NICK"

 

[csnider]

Don't rely on the Timming pin as TDC . . like others have said . it all depends on the pump. . I used a dial indicator to find TDC by dropping the exhaust valve and marking the Harmonic balancer right at the peak TDC. . Both my 92 and 93 were too advanced using the timing pin. . My 93 is 1. 4mm with the pump set right were the factory marks are (supposed to be 1. 25mm there). . I always though it ran better before I bumped it . . once I got a timming kit I figured out why.

My 92 was supposedly "timed" at 1. 5mm when I bought it but . I knew by how rough it was running that it was too far advanced. I retarded the pump by hand to get it a bit smoother. . Later on when I got my dial indicator I measured 1. 78. this is after I pulled it down at least a 16th" from it's "advanced " adjustment. . I find these two trucks to run their smoothest , coolest and most responsive at true 1. 4mm. . I'm sure the timing pin positioning may be slightly different from engine to engine but both mine are too advance to rely on for true TDC. . They certainly are OK to use for valve adjusting purposes... .

As said before some trucks might run better with more or less advance ,, this is just my experience... ... . Carry on...

 

[Sri Ram]

There is some timing info in the FAQ section of this forum, here. You'll probably find something useful…