Originally Posted by TopgunZ (Post 3737110)

The down side could be contamination. If your supercharger chews itself up and metal debris and shavings get into the oil system you could have big problems. This unit is direct fed and not self contained, correct?

Just like the guys that say.. Well if my engine goes then Ill just rebuild the bottom end with new pistons and rods so Its not that bad. Well, my engine went when I was Turbo'ed back in the day and took out the crank, both heads and left a window in the block so I needed an entire new Long block. Cost went way up.

Originally Posted by Jinxx (Post 3737145)

http://www.the370z.com/forced-induct...-pulley-3.html



This is a chart on impeller speed calculation...last time I talked to rotrex they confirmed the calculation as well .....and that is why GTM wouldn’t sell a pulley under 86mm

Originally Posted by Jinxx (Post 3737145)

http://www.the370z.com/forced-induct...-pulley-3.html



This is a chart on impeller speed calculation...last time I talked to rotrex they confirmed the calculation as well .....and that is why GTM wouldn’t sell a pulley under 86mm

Originally Posted by Elmo370z (Post 3737151)

When is the car going to up and running

Originally Posted by tiller (Post 3737150)

Ya I have all that, don’t you have the 85mm installed on yours?

Originally Posted by Jinxx (Post 3737247)

The 85 mm pulley is running 96k impeller speed at 7.5 k rpm and 90k at 7k rpm

Using a 80mm would be running 102k impeller speed at 7.5k rpm and 95k at 7k rpm

That might be stressing the rotrex pretty hard

Originally Posted by tiller (Post 3737290)

Yes, I ran mine all last summer with 85mm at 7.5k with no issues as of yet, I’ll retune n try the 80mm at a 7k redline, like I said I usually don’t redline the car often I’d like to see what type of power differences there is lower in the rpm range where I like it, also may even try some different rear gear ratios as well

Originally Posted by Jinxx (Post 3737175)

Mine is running with the 85mm pulley ...12 lbs boost

Originally Posted by Jinxx (Post 3737336)

I think it will be a wash in difference....what you gain from smaller pulley will be lost from lower rpm
And I have different gearing as well .. the nismos came with I think. 3.96 gear...non nismo was a little lower ... 3.69 if I remember right

Originally Posted by TopgunZ (Post 3737337)

What are your whp/wtq numbers on 12psi? What fuel are you tuned on?

Originally Posted by tiller (Post 3737345)

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 (Post 3737483)

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 (Post 3737490)

Ya for sure, extremely curious to see c38r results