Anyone running Whipple 140ax with 3" upper

[Redfirecobra04]

I am curious to know what you guys get for numbers. Boost, power and torque with just the Whipple 140 and 3" upper pulley. Is there a benefit of getting the 4lb lower? I am thinking of getting rid of the 3" upper for 3.5" and adding the lower pulley.

 

[utfan98]

3"/4 lb lower here. I have not had this combo dialed in yet. Seeing 22 pounds of boost through a 9" filter JLT RAM air setup, 26 degrees timing on 110 race gas fuel. Low assumption of 640/610.

With a 3.25" and a 4 lbs lower I put 622/598 to the wheel seeing about 20.5 of boost on a 70 degree day.

 

[Redfirecobra04]

Thanks a lot for the info. Sure helps in figuring out what to run.