Ok guys, I took my bottomed out fuel screw out of the pump & extended it. . .
man what a rush! The boost at peak rpm jumped from 16 psi into the 22 - 24 psi range. The truck also can be made to smoke like a freight train at will now.

Does this sound right for a truck with stock governor spring, stock converter & an Auto Stoned replacement lift pump (diaphragm)??

 

That's it, I'm doing mine!

 

not to steal the thread but is there any way to idle it down further once you have backed the idle screw out as far as it will go, the pad the idle screw sets on is against the pump and not touching the screw, mine wont idle down any more.

 

that is a good question . . .mine is almost there . . .

 

I have no idea how to do what you are talking about, but I'm gonna figure it out.

 

Ok, great job on not messing up the threads like me

To get the idle down, the throttle linkage has 2 ball joints on a threaded rod. Loosen the lock nuts and twist the rod with a wrench or a pair of pliers.

HTH,

Jo

 

When you really turn up the fuel screw you end up with the throttle lever resting against the casting & can't turn down the idle any further. That is what the is asking about . .

 

there is nothing that ive tried that will let it idle any further down, its impossible unless there is an internal mod i can do.

 

I got mine set to 600 rpm in drive with ac on . . .

 

I pulled the throttle lever apart and skipped a tooth on the shaft. If you look at the 3200 spring threads you will see the part I'm talking about. I just can't remember which way to go. Hope that helps.

Jeremy

 

How bout re-indexing the throttle shaft?

 

That there post above mine wersn't there when I was typing mine. Beat me to it.

 

I concur, just reindex the throttle shaft.

 

Speaking of that 3200 rpm spring . . .
I take it one would make my truck with the stock converter run like a scalded ape??

 

You will have to play with the shift points for maximum benefit, but if yours is a non-intercooled '91 you will notice the extra top end the first time you hit the highway.