New Rotrex C38R Supercharger

Originally Posted by tiller

guess we will see, it sure was a big difference between the 90mm and the 85mm after installed, it brought the boost in earlier but I think a little bit earlier would be even better, but that's just me and where I like my power and boost to come in, I think roughly a 7100k redline wont bother me to much, I reviewed my logs from last summer and they show a redline of 7587k redline with the 85mm while tuning with seb, if I don like it then its only 6 bolts to put the 85mm back on.

Originally Posted by Jinxx

I agree with the boost sooner ..that’s why I went with the 85mm ....the 80mm would be another notable difference early in the boost range which is what’s we are wanting ....that’s why the c38r should be a big improvement for our platform

Originally Posted by tiller

Ya for sure, extremely curious to see c38r results

Originally Posted by Jinxx

I would expect at least 3-4 lbs increase for the whole rpm range .. which would be huge difference

Originally Posted by tiller

Yes, rotrex already decimates all other sc units as it is in overall performance, I have had 0 issues so far and complaints, but sure will be interesting to see what this c38r can do

I’ll get my car on a dyno with the 80mm when I can and if it’s worth it to show some results, if not I’ll be waiting in the wings on c38r results.

Originally Posted by Jinxx

What boost are you seeing with your 85mm pulley

Originally Posted by tiller

I wasn’t able to get my car on a dyno last summer, bought another car in August so I didn’t get a chance, but I will try this summer once the snow melts to get it on dyno with both pulleys,85 & 80

Seat of my pants feeling with the 85mm was great, 1st gear is absolutely useless,that’s why iam rethinking gearing, only issue is the crash bar in front of intercooler, I think it hinders our cars a lot, gonna install FI crash bar this summer.