New Rotrex C38R Supercharger

jefftang04 · 04-25-2019, 08:29 PM

Quote:

Originally Posted by scope22

What did the SC cost you? i see they're about 3K here and there...

Yes that's about right.

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tiller · 04-26-2019, 09:24 AM

Quote:

Originally Posted by jefftang04

Hi guys. Final numbers are out.

471whp on mainline Dyno
HP gain is about 50whp throughout from 5k rpm to 7.5k rpm. Below that is about 20 to 30whp.
14psi of boost at 7500rpm
IAT at peak is 54 DegC
DW 1000cc injectors at 85% duty cycle at peak
No fuel return.......YET........
Fuel pressure at peak is 40PSI. Too low in my books

Cheers guys.

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Are you putting your car back on the dyno after fuel system upgrade? also did the new sc unit bolt up to existing sc bracket without any mods?

jefftang04 · 05-08-2019, 02:31 AM

Quote:

Originally Posted by tiller

Are you putting your car back on the dyno after fuel system upgrade? also did the new sc unit bolt up to existing sc bracket without any mods?

Yes it bolts up the same. But the intake is 3.5" instead of 3"

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tiller · 06-05-2019, 06:24 AM

Quote:

Originally Posted by jefftang04

Yes it bolts up the same. But the intake is 3.5" instead of 3"

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have you put the car back on the dyno yet after fuel upgrade ?

fryzia23 · 02-04-2023, 08:49 AM

bump an old thread, I need to to replace my charger and on the fence whether to go with the R or stick with C38-81 or 91

Averying · 02-04-2023, 12:54 PM

Quote:

Originally Posted by fryzia23

bump an old thread, I need to to replace my charger and on the fence whether to go with the R or stick with C38-81 or 91

Which kit do you have? If it’s stage 1 u prob won’t get more boost out of a better supercharger unit.

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fryzia23 · 02-04-2023, 03:00 PM

Stage 1.5

fryzia23 · 02-04-2023, 03:19 PM

The only thing that’s stopping me from going c38r is the need of custom intake pipe. It’s tight as it is and adding another half inch thicker pipe, it would require a lot of custom welding and compensate for the bends around the engine mount. I think I’m just gonna upgrade to c38-91. Stage 1.5 has c38-81.

Elmo370z · 02-05-2023, 12:25 AM

Quote:

Originally Posted by fryzia23

The only thing that’s stopping me from going c38r is the need of custom intake pipe. It’s tight as it is and adding another half inch thicker pipe, it would require a lot of custom welding and compensate for the bends around the engine mount. I think I’m just gonna upgrade to c38-91. Stage 1.5 has c38-81.

Then get a smaller engine mount lol it’s not rocket science.

fryzia23 · 02-05-2023, 07:26 AM

It’s not that simple, those who have GTM kit know what I’m talking about. Modified mount already came with the kit to make room for the charger.

Elmo370z · 02-05-2023, 09:37 AM

Quote:

Originally Posted by fryzia23

It’s not that simple, those who have GTM kit know what I’m talking about. Modified mount already came with the kit to make room for the charger.

Fair enough. That’s a different animal.

02-04-2023, 08:49 AM	#140 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	bump an old thread, I need to to replace my charger and on the fence whether to go with the R or stick with C38-81 or 91 Noahpalermo likes this.

02-05-2023, 07:26 AM	#145 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	It’s not that simple, those who have GTM kit know what I’m talking about. Modified mount already came with the kit to make room for the charger. Averying likes this.

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02-04-2023, 03:00 PM	#142 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	Stage 1.5

02-04-2023, 03:19 PM	#143 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	The only thing that’s stopping me from going c38r is the need of custom intake pipe. It’s tight as it is and adding another half inch thicker pipe, it would require a lot of custom welding and compensate for the bends around the engine mount. I think I’m just gonna upgrade to c38-91. Stage 1.5 has c38-81.