??? Hay guys&gt; like I said I'm new to this CTD an the bombing part so can some one tell me what this AFC spring kit is for. I'm ordering a cam plate an gauges from TST an they also have this spring kit, what is it an will it help with more power in the longrun.<br> I guess I read to many of your posts on here an now the Bombing starts on my truck. Told the wife I'm going to Bomb the truck an she looked at me like I was NUTS.<br> Hay thanks for all the help so far you guys have been great. ;D

 

I think all it does is lmit smoke when you run higher HP. that means when you put your foot to the floor you don't get as mich smoke.<br>Aaron

 

The afc controls (holds back/regulates) fueling until boost level comes up to support a clean burn. This is why you have the power/turbo lag if you goose the go pedal from idle. The afc has a small boost line connected that feeds pressure to the unit. The afc spring setting controls the boost point at where it allows power fueling to take place. In stock form you will have the lag and no smoke. Reduce the spring setting and you will have quicker acceleration and smoke. Amount of smoke will depend on spring tension and applied throttle/fueling. The afc adjustments applies to both stock and after market plates.

The spring kit is recommended for certain size fuel plates to aid in tuning afc to desired level. My TST #8 is doing ok without the optional kit.

Jerry

 

Ditto. The kit is really for when your stock spring no longer allows the adjustment you're looking for. No problem for me with stock spring and #6 plate.

 

Unless the AFC kit has gotten real pricey, I would do it when you do the plate because you already have the housing off. No need to pull it again if you happen to need it.

 

The 215 HP engines use a very stiff AFC spring. It may take 34+ Lbs of boost to get the AFC arm fully forward. I would get the spring kit for this application.