what upper for pump gas tune?

[chipmonk]

currently im on e85 with a 2.75 upper and 6lb lower making about 24-25psi, im going to put a pump tune on the car since im selling it and everyone does not have access to the corn. I want to get back to about 18psi for pump with the 6lb lower, i was thinking around a 3.5 but what do you guys think? Its a gen I whipple.

 

[Danno44]

I believe 3.5 is the largest you can get. That should be around 19 lbs with your lower. So without swapping the lower youd just have to make do with the 3.5 with less timing most likely.

 

[KINGCOBRA86]

Reichard Racing makes a 4" one might put you at 17?

 

[chipmonk]

Reichard Racing makes a 4" one might put you at 17?

I will never put another rr pulley on my car, my last one exploded on the dyno and put a hole in my radiator.