hey all - first time posting on this site. im always on over on tdr under the same name -wdimig - anyway i just recently got my truck dynoed at kauffman motorsports at the fall brawl,and i studied my dyno charts and they indicated that my truck was defueling alot at about 2700rpm. is that a good defuel rpm with the 3k springs, or should it be more? also can i go back in the pump and tighten the springs one, may two clicks, and will that raise the defuel rpm? any thoughts? thanks in advance

wes

 

I think you need to tighten them a little more with the 3K kit it should not defuel until 3k.

 

Spring for the AFC kit and install the light spring if you want a lot of low end snap and a better balance on the pump. If you tow a heavy load, then use the medium spring to avoid popping a head gasket or stretching the headbolts. After you complete the AFC spring conversion back your governor screws off until they just touch the spacers, and tighten them 4 clicks. That will get you real close to 3,200 rpm before the fueling starts dropping out. Also make sure you have the same number of weights (washers) under each governor screw.