Engine/Transmission (1994 - 1998) Afc Starwheel

[RJ2]

Could someone please explain what the starwheel does.

 

[Piers]

You use the star wheel to adjust the preload on the afc spring. The tighter the spring, the less smoke/ slower you build boost and power, loosen up the tension & the power comes on quicker.

 

[RHARVEY]

I clicked mine 20 toward engine to add more fuel on the bottom end to help when starting of with the trailer. I did help alot, but now when I am setting at an idle and bump the throttle there is a POOF of black smoke and then it clears up.





Rick

 

[BFaoro]

milage

By clicking the starwheel , for more fuel, how will it affect fuel milage ? That is if a person will keep their foot out of it, and attempt to drive like a normal person

 

[SLang]

When mine was stock and a adjusted the star wheel, my MPG went up. I attribute this to the engine using more of it HP. Before the adjustment on long grades I would drop MPH and my boost would slowly rise. After I would not loose MPH and my boost would rise according to load.



If I didn't live in the city right now my AFC spring would be in with the spare parts istead of the light spring I'm running. I think the amount of smoke, power, and acceleration should be controlled by your right foot. When I need fuel I want fuel. I don't want to wait for the truck to catch up to what I'm doing.

 

[RJ2]

Thanks for the info . The reason for asking is I just got the truck ,it's fun to drive, the boost goes to 38 pretty quick but it puts out a LARGE cloud when you nail it. Should I be looking for a happy medium and also is this extra fuel detrimental to reasonable longevity.

 

[The patriot]

RJ2, the engines are way de-tuned in these trucks. I dont think any adjustment you could do on the AFC could effect the longevity.

If you always got your foot in it, a stock drivetrain will not out last a well warmed over one that's driven "normal". Just my . 02

Eric

 

[Stranger]

Originally posted by RJ2

Thanks for the info . The reason for asking is I just got the truck ,it's fun to drive, the boost goes to 38 pretty quick but it puts out a LARGE cloud when you nail it.

And your problem is ? ? ?

 

[RJ2]

Stranger , Have you got a picture of your 3500 slammed.

I assume you switched to bags. What else? Can you still haul a load?

 

[Stranger]

No bags, yet

Chisholm Suspensions Upper and Lower control arms. Not sure if the springs are stock, truck was done before I got it.

Here's a picture that will answer your second question.

 

[Schlen]

how far back?

how far back can one safely move the starwheel? as far as it will go?

 

[RBratby]

you can move it as far backwards or foward as you want to.

 

[Howard Durand]

RJ2,



It is my understanding that the AFC controls fueling prior to the time that the governor takes over and begins to follow the contour of the cam plate.



When I started trying to get more out of the 94, I adjusted the star wheel forward and did gain some low end response.

After putting in the TST #5, I moved the AFC housing all the way forward as instructed. I got lots of smoke but didn't see much change in response. At first I thought I was running away from the pack but later decided they were just dropping back to avoid the fallout.

I finally moved the AFC housing back to the stock location and left about 20 clicks on the wheel. That got rid of most of the smoke and the response was still good.

Following that, I adjusted the governor lever to touch the nose of the #5 plate just above the radius. That has given me much better response that comes on strong following the initial help from the AFC.

Now I am trying to figure out how to deal with the high egt at WOT, Maybe move the plate to the rea a little or invest in a #10.