Nissan 370Z Forum
Page 4 of 4 « First 23 4
Show 40 post(s) from this thread on one page

Nissan 370Z Forum (http://www.the370z.com/)
-   Forced Induction (http://www.the370z.com/forced-induction/)
-   -   New Rotrex C38R Supercharger (http://www.the370z.com/forced-induction/125906-new-rotrex-c38r-supercharger.html)

tiller 03-27-2019 08:19 AM
Quote:
Originally Posted by phunk (Post 3837299)
We made the first returns for the 370z and make frequent improvements any time we can. The kits are very comprehensive, please take a look at our website. As mentioned, the billet top hat is a very desirable upgrade as well. If you have any questions about it please email me at sales@cj-motorsports.com
hey phunk, iam gona need the flex fuel adapter set for my hat i think, switching to e85 this season, are they in stock?

phunk 03-27-2019 09:11 AM
Quote:
Originally Posted by tiller (Post 3837766)
hey phunk, iam gona need the flex fuel adapter set for my hat i think, switching to e85 this season, are they in stock?
Yup they are always in stock

jefftang04 04-07-2019 09:29 PM
Quote:
Originally Posted by jefftang04 (Post 3836692)
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.

Sent from my ONEPLUS A5000 using Tapatalk
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 (Post 3841245)
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 (Post 3841261)
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 (Post 3841245)
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 ?

SS_Firehawk 04-08-2019 06:57 AM
Fuel needs to be at 51psi. Your stock fuel pressure regulator isn't keeping up. Definitely need to switch to a return style. I highly recommend you buy a complete fuel return kit and not piece it together. It's an *** pain. Charles (Phunk) at CJM is my lone recommendation

Elmo370z 04-08-2019 10:42 AM
Quote:
Originally Posted by SS_Firehawk (Post 3841412)
Fuel needs to be at 51psi. Your stock fuel pressure regulator isn't keeping up. Definitely need to switch to a return style. I highly recommend you buy a complete fuel return kit and not piece it together. It's an *** pain. Charles (Phunk) at CJM is my lone recommendation
Mmmm... no one ever listen to me

Jinxx 04-08-2019 12:12 PM
Quote:
Originally Posted by SS_Firehawk (Post 3841412)
Fuel needs to be at 51psi. Your stock fuel pressure regulator isn't keeping up. Definitely need to switch to a return style. I highly recommend you buy a complete fuel return kit and not piece it together. It's an *** pain. Charles (Phunk) at CJM is my lone recommendation
Stock fuel pressure is at 51 ... but any kit that isn’t using a fuel return will see pressure drop .. and is made up with duty cycle ... and I agree a return system should be installed but 40 psi with 1000cc injectors at 85-90% duty cycle should still support 14-15 lbs boost

tiller 04-17-2019 08:08 AM
Quote:
Originally Posted by jefftang04 (Post 3841245)
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?

Z eliminator 04-18-2019 10:19 AM
is this with the upgrades SC?

Z

tiller 04-20-2019 09:11 PM
Quote:
Originally Posted by Z eliminator (Post 3844700)
is this with the upgrades SC?

Z
Yes this is with the new rotrex c38R

jefftang04 04-24-2019 03:25 AM
Quote:
Originally Posted by tiller (Post 3844298)
hey, what was your torque # at 14 psi on the dyno?
50kgm

scope22 04-24-2019 07:14 AM
What did the SC cost you? i see they're about 3K here and there...

jefftang04 04-25-2019 07:29 PM
Quote:
Originally Posted by scope22 (Post 3846153)
What did the SC cost you? i see they're about 3K here and there...
Yes that's about right.

Sent from my ONEPLUS A5000 using Tapatalk

tiller 04-26-2019 08:24 AM
Quote:
Originally Posted by jefftang04 (Post 3841245)
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 (Post 3846839)
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"

Sent from my ONEPLUS A5000 using Tapatalk

tiller 06-05-2019 05:24 AM
Quote:
Originally Posted by jefftang04 (Post 3850516)
Yes it bolts up the same. But the intake is 3.5" instead of 3"

Sent from my ONEPLUS A5000 using Tapatalk
have you put the car back on the dyno yet after fuel upgrade ?

fryzia23 02-04-2023 07:49 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 11:54 AM
Quote:
Originally Posted by fryzia23 (Post 4034594)
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.


Sent from my iPhone using Tapatalk

fryzia23 02-04-2023 02:00 PM
Stage 1.5

fryzia23 02-04-2023 02:19 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 02-04-2023 11:25 PM
Quote:
Originally Posted by fryzia23 (Post 4034607)
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 06:26 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 08:37 AM
Quote:
Originally Posted by fryzia23 (Post 4034615)
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.


All times are GMT -5. The time now is 03:21 AM.
Page 4 of 4 « First 23 4
Show 40 post(s) from this thread on one page

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2