p pump conversion done, onto gsk tune

[stothew]

well i just drove my 4bt p pump conversion for the first time. i have a set of pac brake 4k gsk's. it idles fine and free revs fine. but when i went for a test drive up a hill around the corner from my house it barely wanted to make the hill it would not gain any rpm. at first i was thinking i needed to tune some more fuel to it, but now think maybe the gsk is too tight? on flat ground it takes a long time to build any rpm as well. could it be gsk too tight or loose? or should i just mess with fuel? thanks

 

[L6powered]

How much boost are you making. Are you getting any black smoke from the exhaust.

 

[OrangeNV]

dude, i told ya on CF. ya need some preboost to get things movin. sounds to me like the pre boost screw is backed all the way out.

gsk have nothing to do with fueling down low. they only cut it off at a certain rpm.