New Rotrex C38R Supercharger
 

Is anyone with a GTM/Gamma supercharger kit thinking about getting one of these? My C38-81 is still going strong but I'm tempted to build the motor and get one of these when they come out :stirthepot:

https://jacksonracing.com/product/c38r-pre-order/

I saw this a few weeks ago and posted. I had a similar idea and no one caught onto it.

Oh I'm sorry, I should have searched more! I'm excited about this though, it would be nice to have the option to go for more power with a built motor/e85

Wow that is pretty sweet...i may have to upgrade but my gtm 1.5 is doing well for now

I'm looking for someone who's parting ways with their kit.

Someone needs to take the gtm/gamma supercharger kit and re-engineer it for the masses again. Anyone with a CNC machine interested? :)

somewhere out there is a disgruntled ex employee with all the CAD files and a price in mind. I know because he called me anonymously a few years ago to offer.

Why you no respond

I did

Was the offer crazy bad? Can't you get someone with a kit to stop in to get jigs made?

I am not sure what they wanted, I declined interest in it.

Yes we could reverse engineer it, but I dont think its something we want to get involved with here.

if someone had a 3-d scanner you could simply turn each part into a 3-d solid model for fabrication. Just need someone to lone each component.

Charles maybe?

That's the sad part, the kit is great but their business practices ruined it. It'd be cool if someone remade it but I feel like theres too many good turbo kits available already for it to be worth it

Just comes down to price point and what people want out of their car. Between all the blowers and extra parts i bought for my sc kit im at the same price point of a twin turbo system. the reason i went sc route was the fact i can still work on the car. i dont have the tools or $$ to drop the motor if problems occur, and they will. imo i still think there is a market for sc systems

I’m planning on upgrading to the c38r ....should be a very competitive upgrade and yield 15lbs plus boost pretty easy. I wouldn’t think the price point would be over 9k which would be a good competitor to stillen kit ....for the money i still think the boosted performance kit is the best hp to money kit ....I currently have the GTM kit on my 2015 and the boosted performance kit on my 2017.... the BP kit is a beast ...but I think the c38r will close the gap if not equal it. Finger crossed lol

Dang, must be nice to have both! I just got a G37S sedan (6 speed manual) that I'd love to turbo, idk when that'll happen though

Is it a direct bolt on for the new SC?

Z

It is supposed to be same bracket locations for all the c38series....prolly same housing with upgraded impeller and internals.

If I did not just rip my broken SC out last year and do a replacement I would jump on this, might have to add it to my list when I do e85 now. That list keeps growing of things I want to do if I switch fuel....

This unit is an excellent reason to revisit supercharging instead of having to settle for Stillen, or old GTM kits. There is the RJ-M kit coming out, but it's not for everyone due to the hood clearance issue.

Having a hard time veiwing the link, is it legit?

Iam waiting to hear back if it will fit our existing location

Rotrex A/S


Says maintains all brackery locations for all c38 series for replacements

Do you guys think these blowers are much better than the ones Vortech offers?
The price is super low compared to the Vortech ones, and I havent heard much about rotrex SCs.
Like, if you had a choice:
V7-YSi / V7-YSi billet
vs
Rotrex c38R coming out this year

what would you guys choose and why?

This thing is tiny compared to a V7. Just look at their flow rates.

Another thing to consider other than size ....efficiency ...the v-7 is 78% while the rotrex is 97 % ....also decide how far you want to build the motor ...how much boost you want to run etc.... I’m using the c38 rotrex and running 12lbs boost and make decent hp/tq with it but it is maxed out ....the c38r would put me with all the boost I would be able to run without building the bottom end. ....

However....I don’t have any experience with the v-7 supercharger so my opinion may be a little off ...I have been using the rotrex with no issues and would choose efficiency for my application between the two.

I also can’t find the rotrex cfm..they spec it as .63 kg/s not sure how to convert that over to cfm

So... is efficiency or air flow rate more important when it comes to a blower?
I would guess the air flow rate because you can have 100% efficiency of a tiny blower that has a tiny air flow rate vs a giant blower with less efficiency but way more air flow rate. Am i right or nah?

here is the conversion from bing Convert kg/sec. to cu ft/min | kilogram (petrol) per second to cubic feet per minute :tup:

I may be wrong .. but I would say it depends on the application .. you want a blower that can flow enough CFM for the motor to maintain boost throughout the RPM and within the sweet spot of the blower without overspinning and generating excess heat .... anything after that in my opinion is a waste ... or overkill.... I would never use a small blower that couldn’t keep up...

Or...which blower will make more power. In this case the V7 would. Don't get me wrong, the c38r looks pretty sweet and has huge potential in the right application. For anyone with the gtm kit that can get it for under $700 it's the no brainerest of no brainers to me. I mean, used c38s sell for that. I can't imagine they will be sold at that price though.

Does anyone know what the final price is for the c38r? i just bought a c38-91 too :shakes head:

I would agree the v7 would be capable of more power .... but I wouldn’t say it would make more power at the same boost level. If both blowers are running 10 lbs boost I would say the c38 is a better choice .... more efficient 97% vs 78%... higher rpm 90k vs 66k ... now if you need more boost than 12pbs then the v7 would be the way to go .... the c38r should run higher than 12lbs ... I would say 16 ish.

around $2750 for the c38r unit not $700, if it was $700 I would have ordered 4 of them, iam waiting on more test results before I pull the trigger. but I do know my c38-91 is a great unit already, and jinnxx, we can get a few more pounds of boost out of them now to, ill let you know how it works out, iam gona be the guinee pig for this test and ill post how it goes.

Lets get a bracket CNC'd for the V7 now Topz and call it your stage 2 kit :bowrofl:

Hahahaha.
Do it!!!!!

He has most the items needed just need a v7 and a CNC guy now.

What!!!!
If I knew that I would have instead bought a v7 ysi head unit and sent it to him if he could find a CNC person xD and help him start up a v7 packaged kit T__T

Milkcow500 (Justin) was my second customer and on a G37 sedan. He is trying the V7. Havent got an update in a couple of weeks though.

Are you looking at trying to change the impeller on the c38 to get a few more lbs of boost ...I was looking at that myself ..but needed a backup plan if I trashed the unit....back up plan being a c38r lol

No, got 80mm pulley, 85mm is close to maxing our sc, but I did all the math and by bringing the cars redline to approx 7k I should be fine, that be close to 15lbs of boost or more, I don’t redline my car a lot And like to make as much torque as early as possible, with ecutek tuning it’s a simple trial, if not Just switch back to 85mm.

Some added jwt cams, flywheel, clutch etc etc will contribute also :yum:

And then wait for c38r result so cuz you all know I’ll get it know matter what :stirthepot: