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So I swaped out my stock afc spring w/ my stock middle gov. spring. I did it just how everyone was saying to do, and now my truck has alot less power on the top end, and doesnt smoke at all(not that I care about the smoke). anyone done this with success?
Fist, check to make sure the air line to the AFC is connected and not leaking.
How much boost does it make? the governor spring takes almost twice as much boost to get full fuel as the stock spring.
The spring is also a good amount longer than stock so you may have to adjust the starwheel to avoid coil bind.
pretty sure the air lines are tight.
its makin about 27 lbs right now, takes ahwile to get there, use to make 38 lbs in a hurry no problem.
Im assuming I put in the right spring, the one that is smaller then the stock afc spring right?
With a gsk in it, it takes 22-27psi to start advancing, and takes 55-60 psi to get full travel, I use this in my setup don't really see it working well with your setup. ..
ok wasnt sure, think I might get an actual afc spring kit or just put it back to stock. Any one have an aftermarket afc spring? btw, wheres the screw on the back of the afc supposed to be set at? I didnt even touch it yet.
I've tried TST's spring kit. They are long like the governor spring, which is nice, but softer than the stock springs which is good for a stock truck, bad for a heavily fueled one.
One of the springs is softer than the 215 spring but stiffer than the stock spring in the other pumps, you would probably like this one.
The other is softer than any of the stock springs and probably wouldn't work well for anything but a almost completely stock truck.
My pre-boost screw is backed all the way out to limit the amount of fuel available before the turbo lights. You may like yours in a different position, experiment and find what you like.
10 4 thanks. Ya I was guna get a spring kit today, but the local diesel shop sold out, so im guna get one next week. But I did however get some power back by replacing the stock gov spring with the afc spring. and playing witht the pre boost screw, I have it so it just touches the rod when the motor is off
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