i was wondering about overspinning this charger and what it would take

 

eh, you don't spend much time at that rpm

 

well considering that anything past 6400 rpms overspins the blower...

i just dont know if the bearings are what fails or the impeller itself explodes. Other sites seems to insinuate the impeller comes apart.

either way, hes running with zero problems, so maybe those impeller speeds dont mean much anyhow

 

I way overspun a roots style blower on my 03 cobra for 2 years......and the guy who bought it from me still runs the same setup I had. I think the manu's are pretty conservative.

 

don't roots blowers spin at like 1/2 or 1/3 as fast as centrifugal SC's though?

 

They do spin slower, but are subject to the same problems with overspinning (lots more tq on the bearings due to length of rotors).

Tom

 

Innovate wide band and Aux Box

 

No worries, You can not calculate blower rpm with pulley dia only. With a Serp Belt there will Always be some belt slip, I don't know how much, but the faster you try to spin it, and the higher the Boost, the more it will slip.

The car pulls hard all the way to 7100, but I don't seem to be making more boost. Maybe a very small amount. What does that tell you.........

Also the Max Impeller speed Rating of the Blower is just a calculated Number, and Warranty is part of it.

Anyway, 38,000 miles on the blower with 6600 RL, about 1000 miles with 7100 RL, 4 runs, and a hell of a lot of Tuning in the higher rpm range, so far so good.

 

I am not the one who said a touring z weighs 3450lbs. You should have known you're opening up a new can of worms with a ridiculously false statement like that.


Once again, good times

 

Come and get Me............

 

Interesting...............

kleefton ???

 

Don't forget they have a full cage, parachute, and the TT setup so that adds quite a bit of weight.....and thats weight with driver.

Chris what are you now 450, 475? lol JK

Tom

 

I had my Vortech on for little less than a year, but never took it to the track. On a stock clutch/flywheel whats the "ideal" rpm to launch to minimize spin? Sorry for the noob question.

 

Awsome times!!

 

You still need that cam info??

 

Thanks for your input, ended up going with the jwt s1.

 

Why does your car weigh so much? I have a 03 Touring with nav etc and it only weighs 3360 with spare tire, jack etc and a half tank of gas...and big *** heavy 19's.
I have weighed it on a certified scale.

Very nice run!!!

EDIT..did not know there was a debate about weight..I was just curious and hadn't read all the posts.

 

intercooler, piping, supercharger, supercharger bracket with pulleys, oil pan spacer with an extra quart of oil, gauges and all the wiring, engine management with all the extra cabling etc, etc...

 

Great job Tim! Was this on 93 octane?

 

100 octane......... still only 13 runs on the car and still has a bit more left in it, just don't want to screw up my car so I'm not pushing it 100% yet.

Have you been back to the Drags?

Thanks..........

Tim