How to calculate my Whipple rpm's???
#2
11 Second Truck Club
iTrader: (2)
I have always did it like this-somebody correct me if I am wrong......Divide your lower pulley by the upper then multiply that times max rpm you are gonna turn. I think the lower pulley is 7.5 so divide that by your 3.5= 2.14 times say 6000 rpm = 12,840 blower rpm.
With that being said, I am running a 2.75 on my Whipple and shifting at 6200 rpm. That figures up to 16,900 blower speed. No problems yet and I have been running it that way almost a year.
With that being said, I am running a 2.75 on my Whipple and shifting at 6200 rpm. That figures up to 16,900 blower speed. No problems yet and I have been running it that way almost a year.
#3
TECH Fanatic
iTrader: (1)
The way L-Eater does it is how I figure it too.
My truck has a 7.5" crank pulley and a 2.5" Whipple pulley. It's a factor of exactly 3 times.
I'm shifting at about 5100RPM, that's a blower input speed of 15,300RPM. That's wll over the 13K constant limit and I have absolutely ZERO problems with the compressor. Last week I hit 50K miles on the supercharger to. The unit on mine is the tiny 1.6L one, not the 2.3L like you guys have. They have the same RPM specs.
What's really mind-boggling with these things is that the second rotor is overdriven by the first one 3 to 5. On my setup that second rotor reaches 25,500! It's a wonder the oil doesn't turn to froth. Just think about how far parts would fly should it ever come undone. lol
My truck has a 7.5" crank pulley and a 2.5" Whipple pulley. It's a factor of exactly 3 times.
I'm shifting at about 5100RPM, that's a blower input speed of 15,300RPM. That's wll over the 13K constant limit and I have absolutely ZERO problems with the compressor. Last week I hit 50K miles on the supercharger to. The unit on mine is the tiny 1.6L one, not the 2.3L like you guys have. They have the same RPM specs.
What's really mind-boggling with these things is that the second rotor is overdriven by the first one 3 to 5. On my setup that second rotor reaches 25,500! It's a wonder the oil doesn't turn to froth. Just think about how far parts would fly should it ever come undone. lol
#4
TECH Regular
Join Date: Dec 2002
Location: Pensacola, FL
Posts: 486
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by L-EATER
I am running a 2.75 on my Whipple
As far as Ranwalk's question, what L and James said is how I have learned to measure it as well. Although I believe that the max sustained RPMs are 14500. How long the Whipple could last at 13k or 14.5k RPMs is the real question since we only see max RPM at the shift points for relatively short durations of time.
Trending Topics
#8
TECH Fanatic
iTrader: (1)
Originally Posted by Yellowsierra
Were did you guys get that small of a pully at. I thought 3.5 was as small as whipple made.
There are two versions of the Gen-III motor Whipple it. The dual-belt kit will accept the small pullies. The single belt kit is limited by the fact that the pulley has to fit over the drive hub on the supercharger. That hub is over 3" in diameter.
Anybody who sells Whipple can get Whipple pullies.
Thread
Thread Starter
Forum
Replies
Last Post
BROKE-aSS-BLAZER
GM Parts Classifieds
7
10-13-2017 03:50 PM