New Rotrex C38R Supercharger

Jinxx · 03-13-2018, 06:57 PM

Quote:

Originally Posted by tiller

Jinxx are you on the pre order list for c38r?

No I’m not .... I wanted to see the final specs before buying ... had they released the specs first I would have been... I did call Jackson racing and talked to them about it ... they said that the c38r will have 30% more output over the c38 throughout the rpm range ... all good news to hear lol

tiller · 03-15-2018, 08:26 AM

Quote:

Originally Posted by Jinxx

No I’m not .... I wanted to see the final specs before buying ... had they released the specs first I would have been... I did call Jackson racing and talked to them about it ... they said that the c38r will have 30% more output over the c38 throughout the rpm range ... all good news to hear lol

ya iam waiting on the specs to, sounds promising so far. I spoke with Jackson and kraftwerks also.

batboyvaj · 05-30-2018, 12:46 PM

The c38r was suppose to start shipping in Apr. Did anyone purchase one to test?

R3drckt09 · 05-30-2018, 01:41 PM

I wanted to but it wasn’t quite the right time for me. I called Jackson Racing this morning and they said the pre order is closed but those units will ship in June, and then more will be available for purchase in July

Amaterazu · 05-31-2018, 03:37 AM

Is it possible to put a rotrex supercharger and an FI twin turbo in the same vehicle?
I think that would be crazy if it lasted!

I'd do that too....just to see how it feels!!!

kentmo280z · 05-31-2018, 12:40 PM

sub'd

daveb91 · 05-31-2018, 04:16 PM

Quote:

Originally Posted by Amaterazu

Is it possible to put a rotrex supercharger and an FI twin turbo in the same vehicle?
I think that would be crazy if it lasted!

I'd do that too....just to see how it feels!!!

And why?
Yes you could but why...unicorns could also fart raindows....

Zingston · 05-31-2018, 05:09 PM

Quote:

Originally Posted by Amaterazu

Is it possible to put a rotrex supercharger and an FI twin turbo in the same vehicle?
I think that would be crazy if it lasted!

I'd do that too....just to see how it feels!!!

Keep us posted!!!

tiller · 06-04-2018, 06:54 AM

Quote:

Originally Posted by batboyvaj

The c38r was suppose to start shipping in Apr. Did anyone purchase one to test?

I contacted a rep that was on there US sales board, nothing as of yet, I’ll post in here as soon as there’s news.

pokeyl · 06-06-2018, 07:35 AM

Quote:

Originally Posted by Jinxx

88mm supercharger pulley

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

The 84mm is at 91280 at 7k rpm......a 80 mm would put you over 100k ...
Also TOPGUN is correct ..if you blow the supercharger you could damage much more than just the bottom end .. we all take that risk when boosting but ....I wouldn’t go that far over specs on a blower

I might be reading the charts wrong soooo ......im still not sure

It's my chart and you are reading it correct.

jefftang04 · 01-16-2019, 12:33 AM

Hi All,

I just recieved My C38R unit. Will be replacing the C38-81 on my GTM Stage 1.5 kit in February.

Currently I'm doing 450whp and 380lbft at 10PSI. Will update with results once the system is running.

a few points:
1) The inlet is 3.5" as compared to 2.5' for the C38-81
2) From my calculations current C38-81 is drawing 80+ HP at peak (85mm pulley)
3) If you were to run the C38R at peak rpm it will draw up to 130hp. This will affect the pulley system requirements. currently my system is running 8PK instead of the
stock 7pk. Still, it barely meets the needs of 130hp. i believe 10pk would be needed to maintain the same belt change interval.
4) The C38R (7:1) has a different gear ratio as compared to the C38-81 (6:1) ratio so the pulley size will definitely change.
5) Because of the pressure ratio (assuming rest of the system is the same) IAT will increase by about 25degC so upgrading IC might be unavoidable.

Thanks all

R3drckt09 · 01-18-2019, 12:08 PM

I’m stoked someone actually got one, I was starting to wonder if these were ever gonna ship! I didn’t realize the inlet was larger though, I’m guessing you’ll have to get a new intake tube?

jefftang04 · 01-18-2019, 07:12 PM

Quote:

Originally Posted by R3drckt09

I’m stoked someone actually got one, I was starting to wonder if these were ever gonna ship! I didn’t realize the inlet was larger though, I’m guessing you’ll have to get a new intake tube?

Will have to custom the intake tube.

tiller · 02-16-2019, 05:14 PM

Quote:

Originally Posted by jefftang04

Hi All,

I just recieved My C38R unit. Will be replacing the C38-81 on my GTM Stage 1.5 kit in February.

Currently I'm doing 450whp and 380lbft at 10PSI. Will update with results once the system is running.

a few points:
1) The inlet is 3" as compared to 2.5' for the C38-81
2) From my calculations current C38-81 is drawing 80+ HP at peak (85mm pulley)
3) If you were to run the C38R at peak rpm it will draw up to 130hp. This will affect the pulley system requirements. currently my system is running 8PK instead of the
stock 7pk. Still, it barely meets the needs of 130hp. i believe 10pk would be needed to maintain the same belt change interval.
4) The C38R (7:1) has a different gear ratio as compared to the C38-81 (6:1) ratio so the pulley size will definitely change.
5) Because of the pressure ratio (assuming rest of the system is the same) IAT will increase by about 25degC so upgrading IC might be unavoidable.

Thanks all

Good to hear there actually getting out to customers, have they said when there gona be available for anyone to purchase?I’ve been waiting on info for awhile as iam thinking about upgrading my rotrex on my gtm stage 2 kit.

What was the final cost if you don’t mind me asking? I believe the c38-91 that is on my car is already 3” inlet.

Keep me posted thanks

Jinxx · 02-16-2019, 08:50 PM

Quote:

Originally Posted by tiller

Good to hear there actually getting out to customers, have they said when there gona be available for anyone to purchase?I’ve been waiting on info for awhile as iam thinking about upgrading my rotrex on my gtm stage 2 kit.

What was the final cost if you don’t mind me asking? I believe the c38-91 that is on my car is already 3” inlet.

Keep me posted thanks

The gtm stage 2 kit has a 3 inch pipe with a 4 inch velocity stack

01-16-2019, 12:33 AM	#86 (permalink)
jefftang04 Base Member Join Date: Apr 2018 Location: Singapore Posts: 18 Drives: 350z Rep Power: 7	Hi All, I just recieved My C38R unit. Will be replacing the C38-81 on my GTM Stage 1.5 kit in February. Currently I'm doing 450whp and 380lbft at 10PSI. Will update with results once the system is running. a few points: 1) The inlet is 3.5" as compared to 2.5' for the C38-81 2) From my calculations current C38-81 is drawing 80+ HP at peak (85mm pulley) 3) If you were to run the C38R at peak rpm it will draw up to 130hp. This will affect the pulley system requirements. currently my system is running 8PK instead of the stock 7pk. Still, it barely meets the needs of 130hp. i believe 10pk would be needed to maintain the same belt change interval. 4) The C38R (7:1) has a different gear ratio as compared to the C38-81 (6:1) ratio so the pulley size will definitely change. 5) Because of the pressure ratio (assuming rest of the system is the same) IAT will increase by about 25degC so upgrading IC might be unavoidable. Thanks all scope22 likes this. Last edited by jefftang04; 02-25-2019 at 05:08 PM.

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05-30-2018, 12:46 PM	#78 (permalink)
batboyvaj Base Member Join Date: Jun 2011 Location: mn Posts: 111 Drives: 2011 370z Rep Power: 13	The c38r was suppose to start shipping in Apr. Did anyone purchase one to test?

05-30-2018, 01:41 PM	#79 (permalink)
R3drckt09 Base Member Join Date: Jul 2013 Location: Texas Posts: 143 Drives: 09 Nissan 370Z Base Rep Power: 11	I wanted to but it wasn’t quite the right time for me. I called Jackson Racing this morning and they said the pre order is closed but those units will ship in June, and then more will be available for purchase in July

05-31-2018, 03:37 AM	#80 (permalink)
Amaterazu Base Member Join Date: Oct 2017 Location: America Posts: 16 Drives: 2016 MT 370z Rep Power: 498	Is it possible to put a rotrex supercharger and an FI twin turbo in the same vehicle? I think that would be crazy if it lasted! I'd do that too....just to see how it feels!!!

05-31-2018, 12:40 PM	#81 (permalink)
kentmo280z Base Member Join Date: Sep 2014 Location: Akron , Ohio Posts: 199 Drives: '10 370Z Roadster Rep Power: 10	sub'd

01-18-2019, 12:08 PM	#87 (permalink)
R3drckt09 Base Member Join Date: Jul 2013 Location: Texas Posts: 143 Drives: 09 Nissan 370Z Base Rep Power: 11	I’m stoked someone actually got one, I was starting to wonder if these were ever gonna ship! I didn’t realize the inlet was larger though, I’m guessing you’ll have to get a new intake tube?