WTB: Whipple Pulley 3.875

If anyone has a 3.875 Whipple Pulley please let me know. Id like to buy one.

Thanks

I've got a 3.75 and 4.00. Only 1psi difference either way.

Ill take the 3.75. On a 3.4 Whipple crusher with longtubes and cams, what would the boost be with a 3.75 upper and 10% lower? Estimate.

Thanks

Email me at [email protected]. I'm out of town till Wednesday. As for what boost, my swag would be 23-24 psi I guess. It's hard to guess what it would be with mods. Have your tuner give you a fat AF tune with little timing and go do a short 4th gear pull with a boost gauge. That's what I had to do. I have ported shit, cams, 2" LTs on a 4.0 Whipple and it was a crap shoot until I finally did the 4th gear pull and verified it on the dyno.