New generation.

You're right, I have a BIG overspin of 93rpm on 12k rpm!! If the blower is destroyed for a 93rpm, is that it was not good part.

A lot of people run K20 with Rotrex unit in overspining of 3% - 10% with no problem after several years. I am not saying that this is the thing to do but we must be realistic.

I have a friend who run a C30-94 with 16psi-17psi with a K20. No noise or lost boost since 4 years...
Lucky, I do not know but it is not the only and still works!

 

Awesome! I hope to spin mine to oblivion @ 10-11K rpm.

 

All thing equal psi can nearly double with just IC and charge pipe swap? This combo requires removal of AC?

 

Seems like an odd contraption. The input shaft speed is just as high for a lower boost level. Not sure why you wouldnt just run full boost but rev less. Short shifting seems like a smarter way to stay low on boost for the blower and the motor.

 

Amazing amount of misinformation and lack of understanding here.

Boost is not ONLY determined by blower speed. There are several other factors. C38 series blowers have a maximum factory specified speed of 12,000rpm input shaft speed which equates to 90,000rpm impeller speed. Exceeding this specification is NOT recommended by Rotrex. This does not mean it can't be spun faster for a lessened lifespan. Lessening the rev limit on an F20c or F22c engine is in most cases not the best for performance. These motors make power all the way to redline and in some cases beyond redline...lowering the rev limit simply chokes off available power...but will that work?...sure...not ideal though.

 

Nearly double? Absolutely not. From 10-12psi to 16 is not double...on a C38-81...a C38-91/92 is good for 2-4 psi more in the "ideal situation". This is NOT a 1+1=2 scenario...it doesn't work like that. Just like every F22 engine that rolls off the assembly line does not make exactly the same power.

 

This combo requires removal of AC?


No...please read carefully...3 different kits

From my earlier post...

"To be clear there is the base kit known as the Supersport kit, the bottom mount kit (which removes the ac compressor and is suggested for racing purposes) and the Race kit which has a higher flowing I/C and 3" charge piping (capable of 16-18psi with the C38-81 or 18-20psi with the C38-91). This should clear everything up"

 

12k rpm is the input shaft blower. No the engine rpm!!

12093 rpm blower @ 9000 rpm engine

 

I couldn't agree more with this one sentence for the entire thread. No doubt this will be detrimental to potential TTS buyers or information gatherers in the future. Guess we'll have to wait for actual results to be released for both kits as opposed to perceived to make sense of what is trying to be achieved here. As of now, there are specs of TTS' kits (both their supersport and full race kits) which are nothing short of impressive to say the least. As for KW, there seems to be little if no reviews as of yet.

 

What is the difference between a kit designed for racing purposes and a race kit?


Where does it say in your paragraph whether the race kit requires or does not require the removal of ac?