On a gibbs truck you cant change the pulley because it is pressed on. It is different than a standard magnacharger setup that is held on with a nut.

 

yeah but all you have to do is change the blower snout with a keyed shaft one and a bigger fuel pump and new tune so that would be no problem

 

I think they have a 3.6 pulley on it also so it would have lower boost than a regular magnacharger. Magnachargers come with a 3.4 pulley right. I could be wrong thought.

 

JG's should come with an adequate fuel pump, the regular Radix pump

mine came with the 3.4 pulley, but I think its different for other motors....?

 

does anyone here have any idea what my truck would run in the 1/4 mile with the 3.1 pulley and a set of the jba shorty headers?

 

i've seen one run 13.83 with out the 20's and a different program the pumps are not the magnacharger fuel pumps they are just stock ones with a voltage increase to pump a little more fuel one of my friends works at the chevroltet place here and we drive all of them the extended cabs regular cabs and tahoes the tahoes are the funnest to drive they will cut donuts like a mug but i have never heard of one in the 12's the transmissions dont last to long either they are having a lot of propblems with them

 

I read an article about them putting down 395 rwhp. Is this correct ?
I could see them running 12's with that much HP.

 

that is not correct my truck would probably make about 370-380 on a Dynojet.....I would guess 350 for a JG


I forgot the 04's dont use the inline fuel pump

 

390rwhp at 5200, reported in Super Chevy/August issue.

 

Yea i thought that was wrong. Thats alot of Hp from a supercharger at the tire.