New Rotrex C38R Supercharger

jefftang04 · 04-07-2019, 09:29 PM

Quote:

Originally Posted by jefftang04

Hi Guys.

Latest updates. I maxed out my fuel injectors (550cc) at 400whp mainline at 5200rpm. Because of the increase in boost (7psi to 12 psi at 5200rpm) and my fuel pressure dropping to 40psi, injectors are max out. I'm going to get DW 1000cc in.

Also I'm thinking of getting a fuel return system on the car. What do you guys think. It's troublesome but I'm not sure if I can get away without one.

Thanks.

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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.

Sent from my ONEPLUS A5000 using Tapatalk

batboyvaj · 04-07-2019, 09:44 PM

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.

Sent from my ONEPLUS A5000 using Tapatalk

What kind of dyno are you using? The numbers seem really low. Do you have baseline numbers from that dyno?

Spooler · 04-07-2019, 10:24 PM

Quote:

Originally Posted by batboyvaj

What kind of dyno are you using? The numbers seem really low. Do you have baseline numbers from that dyno?

That is a mainline dyno. Multiply by at least 1.1 to get dynojet numbers. Some are even off as high as 1.17. So between 518hp/551hp for dynojet numbers that you are use to.

Spooler · 04-07-2019, 10:26 PM

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.

Sent from my ONEPLUS A5000 using Tapatalk

Get a fuel return system quick before something bad happens.

Jinxx · 04-07-2019, 10:37 PM

Those numbers are very very low ..even without the fuel return ..40psi with 1000cc injectors is still a lot of flow for 14lbs of boost ......I was at 522whp at 12.5 lbs with 93 oct fuel with the stage 2 kit with 650cc ...I was planning to add the methanol kit and would have been around 575whp ish ....what fuel are you running ...91oct?....93oct?.... or e85 ?

tiller · 04-17-2019, 08:08 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

Sent from my ONEPLUS A5000 using Tapatalk

hey, what was your torque # at 14 psi on the dyno?

jefftang04 · 04-24-2019, 03:25 AM

Quote:

Originally Posted by tiller

hey, what was your torque # at 14 psi on the dyno?

50kgm

tiller · 04-26-2019, 08:24 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.

Sent from my ONEPLUS A5000 using Tapatalk

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, 01:31 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, 05:24 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 ?

04-07-2019, 10:37 PM	#5 (permalink)
Jinxx Track Member Join Date: Dec 2015 Location: South Carolina Posts: 699 Drives: 2017 nismo 370z Rep Power: 3377	Those numbers are very very low ..even without the fuel return ..40psi with 1000cc injectors is still a lot of flow for 14lbs of boost ......I was at 522whp at 12.5 lbs with 93 oct fuel with the stage 2 kit with 650cc ...I was planning to add the methanol kit and would have been around 575whp ish ....what fuel are you running ...91oct?....93oct?.... or e85 ? Last edited by Jinxx; 04-07-2019 at 10:54 PM.

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