Max Supercharger RPM's
 

Guys does anyone know whats the max the s/c can take in terms of RPMS?

I'm planning on running my code 3 stacked with a 178 crank pulley which will put the supercharger at 16,440 RPMS @ 6,000RPMS (engine).

I know it wont handle it for long periods of time, but should it be okay if I dont go to hard for to long?

Would extra cooling e.g. water/meth help the cause?

Re: Max Supercharger RPM's
 

dude im not sure on your topic as i have a N/A however i have read a post on this site that said something obout 6200RPM (motor) being darn close to max attchieved. i fail to se the need to red line the Xfire as you will be way over your power and torque curves which in real terms equate to speed the thing we all like.

ps my sister is on the gold coast and loves aus. me i love it here is SA. how do you think we are going to do against each other in the 20/20 cricket world cup ??

Re: Max Supercharger RPM's
 

I have been running stacked (C3 + 181) for quite a while now. You are correct in stating, "I know it won't handle it for long periods of time" as I did have a problem after an extend run at upper RPM levels over a 30 mile or so run. But around town, light to light driving shouldn't be a problem.
Somewhere there's a list of pulleys and rpm levels. I don't think that stacked C3 + 178 is any worse than running a 185 alone.
A A/F ratio gauge is cheap insurance to ensure you aren't running too lean. Get one.

Re: Max Supercharger RPM's
 

Here's part of the info I have in my notes. I don't remember who the original author is though...

"The MAX RPM our SC can spin is 20K but that will distroy it quickly.
MAX safe SC RPM is 15.5K to have any chance of a long life.

Let's calculate SC RPM.

Crank / SC = (Ratio) * Engine RPM = SC RPM

155 / 74 = (2.10) * 5.8K = 12,180 SC RPM (Factory)

178 / 74 = (2.41) * 6K = 14,460 SC RPM

181 / 74 = (2.45) * 6K = 14,700 SC RPM

185 / 74 = (2.50) * 6K = 15,000 SC RPM

Code 3 pulley = 65mm (so I've read)

155 / 65 = (2.38) * 6K = 14,280 SC RPM

178 / 65 = (2.74) * 6K = 16,440 SC RPM

Raise your rev-limiter over 6K when you tune and then re-do the math."

I'm pretty sure anything over 15k RPM is considered maxing out the supercharger. Anything over 16k I'd say you'll burn it up pretty quick from what I've read (the danger zone, if you will).

Re: Max Supercharger RPM's
 

well, the maximum rpm is irrelevant.

you guys need to find the compressor map for your supercharger and plot out the points...
you could spin the supercharger to 20psi, but it wouldnt matter if it was just pumping out superheated air

Re: Max Supercharger RPM's
 

Hey don't forget the 192mm pulley guys!

192mm : 74mm = 2.60 Ratio
192mm : 65mm = 2.95 Ratio

Here's Brian's original post.

Re: Max Supercharger RPM's
 

I found the thread where this was discussed. It's full of information, and the compressor maps.

https://www.crossfireforum.org/forum...rchargers.html

Les

Re: Max Supercharger RPM's
 

She picked a great place to live, so nice and warm there. I'm in Victoria it's always cold here :rolleyes:

My dad's into the cricket, he cant see Australia loosing but you never know :p

Re: Max Supercharger RPM's
 

Running them both have you found the car to be faster? or does the heat hold you back? I'm thinking if new injectors are needed :(

Re: Max Supercharger RPM's
 

Great find Les, it was a good read. But we never found out if the C32 injectors are larger then our SRT-6 injectors?

I wonder if say SL55 Injectors would be a straight fit without any modifications.

Re: Max Supercharger RPM's
 

What I distilled from the thread is that the supercharger is a blessing and a curse. It makes huge power and at the same time limits how much more power we can add. I think that's the reason the real power hungry owners are selling and moving on. But hey, I'm happy with a mid 12 6 cylinder. I'm working on getting the car faster in the curves and stopping. That's where I'm hungry.

Les

Re: Max Supercharger RPM's
 

Haven't been to the strip to measure time wise but in stop and go acceleration on the street there is a difference. No regrets here.
Using stock injectors and all is fine. Keep in mind that I'm at 4700 ft elevation so there may be some difference at sea level.