Engine/Transmission (1994 - 1998) AFC Spring & Kit Questions

[FATCAT]

OK, I lost my original instructions to the TST AFC Spring kit, but need to know how to reduce some of the smoke I am blowing these days.



I now have the #10 plate in and the softest spring in the AFC housing. I thought the softest spring was the one to allow the turbo to boost quicker, thus reducing smoke ... is that the way its suppost to be? Or do I have it backwards?



The two other springs I have are a short one that is really tight and a longer one (same size as the soft one I have installed now), but stiffer than the softer one (the medium spring).



The AFC is spun all the way forward and then backed off two clicks. So what else can I do to keep the smoke down. My neighbor said he was going to sue me for a new paint job on his Ranger after he was behind me coming out of the dump and I punched it up the hill ... he said it looked like a forest fire.

 

[vssman]

'Cat,



The medium spring holds the lever back longer (i. e. needs higher boost to overcome spring force) and thus controls smoke better than the light one. The only draw back is that it may feel like you've lost some bottom end when compared to your current set up. You can also try moving the AFC houing back slightly to have the light spring add some more pressure.

 

[Piston Slapper]

Originally posted by FATCAT

... he said it looked like a forest fire.

Did you tell him thanks!



The tighter the spring, the more tension on the Diaphram the better smoke control.

 

[Got Smoke?]

Re: Re: AFC Spring & Kit Questions

Originally posted by Piston Slapper

Did you tell him thanks!

My thoughts exactly! :-laf :-laf :-laf Oo.

 

[Cooker]

To reduce smoke you could also try backing off the AFC some. All the way forward = max smoke.

 

[98rammer]

the short, stiff spring is the stock one... don't use it. use the longer spring like the one currently in your truck, but stiffer. and then obviously play around with the star wheel until the smoke isn't coming out like thick clouds.



there comes a point where you can only go so far. after that point you're just wasting fuel. with clouds of smoke, you're at your max for spool up- adding more fuel (smoke) wont help it, and then there gets to a point where there's way too much low end fuel in which "bogs" the motor down.



Tom

 

[Joseph Donnelly]

Try the medium spring with 10-15 clicks. With the big injectors AND the #10, you may need to use the short heavy stock spring to get "complete" smoke control.

 

[98rammer]

the short/stock one would have to be pretty tight wouldn't it? at the higher elevations, i noticed that even with a the stock spring fairly tight, there was always a puff before the spring would start to tighten and clear up the smoke. i figured the longer one that puts tension right from the get-go would be better... but just use a stronger spring.



Tom

 

[FATCAT]

Guess I'll go back into the AFC this weekend and install the longer, stiffer spring and add some clicks to it. Hopfully it will reduce the smoke a little. Don't want to eliminate it completely though.

 

[Joseph Donnelly]

If the smoke is at zero boost, back off the stud (it takes the 3 mm Allen and has the 10 mm nut) 1/6 of a turn at a time until the zero fueling point is low enough to avoid smoke. Alternatively, those seeking best response without smoke will turn the stud into the housing 1/6 turn at a time until they just start to get smoke.