In the pic it looks like the rotors "screws" are cone shaped?? It would be one way to compress the air.

you've been saying this for over 3 years :party-smiley-004: the PSI is avail and PROVEN by Ch!ps kick azz speeds .no belts coming off or bearing & snout problems :evilb:

I also agree with fountain42. I have not had any experience with the Whipples but I did run a pair of PSI's for over 10 years on my 38 Cigarette with absolutely no trouble. No bearing failure nor throwing any belts, just outstanding performance and reliability.

same here...496/whipple,and very satisfied

yah 2 yrs in a row Dan didn't finish the borden light pokerrun with his 40 skater running sterlings1350/1550 whipples cause of the pulley shaft or pulley:(:( I caught this second hand but was there there to see it towed in twice. I need to drop off pics to him and fined out. I think he had computer issues up at loto too which would suck real bad since its a 30 to 35 hour tow.I like the old school psi and am happy with my 1071 and dyno #s . Dean Gellner builds nice stuff and he is the one working on your junk, not someone who has a bunch of guys building under his name and your paying big funds for there name.

3 years? Lets not exagerate quite so much. Its been about a year now and something this big and with all the new technology it features, takes some time to develop. As for belt issues, 99% of them are from incorrect setups. You ever see how many belt issues customers with PSI's have when they try to make power? Almost all had to go to kevlar belts. Ask any drag racer how belts live with there PSI's.

Actually not true, especially since I was there. They had a pulley issue, as they had bolts 1-2mm too long. That was fixed, they had other issues. When they had drive issues before, they were not our drives, they were built by someone else and they were a mess. Any part can have a problem when its not installed properly or not used properly, but when its used as designed and intended, failures are rare.

PSI's rotors are an old, out of patent design that cannot maintain the efficency or flow levels of the later profile shapes, thats not fiction, thats fact. Many later technologies have come out in the last 50 years since those rotors were designed. Time will tell whats superior.

hows is wipples customer service after the sale??????????????

Whipple. Most efficient blower out there

Art, not true as I was there as well.