ClassA4x4

I have the 366 (3200rpm) spring installed. At no load, I can rev it up to 3200RPM (my accelerator linkage is already hitting the cam stop) when I floor it. However, when accelerating in the freeway, from crusing speed, like from 65mph at 2300 rpm, when I floor it, it only goes up to 2500rpm, and never beyond. What's the deal?

maybe368

There are many factors that go into determining max RPM's, like weight, grade, gear ratio, general condition of truck, fuel supply,air supply , tire size to name a few. If you can get 3200 with no load, I would say it's working...Mark

ofcmarc

Back the high RPM stop screw out a bit and you can get more RPM under load.

ClassA4x4

I have done that, but the cam stop is preventing the accelerator rod to go back any further. And if I shorten the rod, my low idle cam stop will engage and the idle will be too high. Seems there's something wrong with my setup?

I tried to fix the problem by modifying the throttle index; however, one tick mark amounts to 700 rpm difference, and the idle screw has to be moved forward about an inch to for proper idle - that's way far off from how it was in the donor vehicle.

BigblackDodge21

Hi guys im new here and im looking for some advise. I want to make more power but i dont want to spend a bunch more. Here a list of what has been done
injection pump modifide
DDP stage 4 injectors
B1 turbo
4 inch exhaust
ASE intake
exhaust manifold has been ported
Im about to get a South Bend Clutch but after that i dont know what to do iv thought about a camshaft or maybe stepping up to the 3600 RPM govener spring or maybe having my head ported and polished

Richie O

Move the linkage on the pump to the next hole in.





.

ClassA4x4

[QUOTE=Richie O;2925672]Move the linkage on the pump to the next hole in.





.[/QUOTE

I think that only applies to trucks with manual transmissions. If I use that hole, where will I hook the return spring for the throttle valve cable?

Richie O

I have it that way on all 3 of my trucks. 89 with and auto and the 92 and 93 with a stick. That picture is not of my truck, just one I stole somewhere. I just moved the spring like above I think. My trucks are covered in 2 feet of snow so I can't go look.

DLittle

I've got a 92 auto and I've got mine the same way. Just move the spring. I removed the high rpm screw altogether .

KD93

I didn't remove my screw, but it's backed out far enough that the throttle is at full travel with a nice gap between the stop and the end of the screw. Mine is set up the same as in the pic', and I have an auto.

ClassA4x4

OK, so where do you hook the return spring for the throttle valve cable for the transmission? It's at the pump side of the lever. Here's a pic from the FSM. At the end of the slot there is a spring whose other end is attached to the hole that you're recommending. Wiithout the spring it'd just flop around causing problems.

KD93

When I get home, and if I remember, , I'll take a photo of my mess.

92betsy

My spring for the tv cable is hooked up to the hole in the throttle lever that you can see the other spring in the picture hooked up to. It won't hurt anything.

ClassA4x4

But the spring would then cross over to the other side of the rod, I'm sure it'd cause some interference. I think a piece of metal with a hole can be inserted with the ball nut of the accelerator rod or a small hole drilled beside it, and that could be used for the other end of the TV cable spring.

92betsy

Yeah it crosses under the rod but never had any problem been like that for a while now. It barley touches the rod and moves freely.