Topgunz ROTREX C38R Supercharger Kit

theDreamer · 03-08-2021, 12:36 PM

Quote:

Originally Posted by redondoaveb

I guess I should have worded it differently. I should have said "big" power. Both my V3 Si and V2 Si made 680whp. I have confidence in Aaron and I don't think he would be developing the rotrex kit unless he knew of the capabilities. And Elmo said that he could have told me to wait. The problem is, I don't think he knew Aaron had a kit in development. I know Aaron well and he didn't even tell me what was in the works. Had I known, I may have dumped my Vortech kit and gone with the Rotrex but I decided to dump the Vortech and am going with FI tt's.

The problem with ‘big numbers’ in a SC build is you won’t really see the same results as a TT build. The twin turbo kits are amazing and provide some great head room if you get into a built engine, where the SC kits can do solid numbers but once you start down the engine building route you realize a TT kit just gets you more.

My view, or opinion, was always the SC was a solid power plant and delivery for folks who did not want to get into the power race. You can get solid numbers and have an amazing car, but if you want to play at the top of the power scale you are better off investing in a TT kit (and of course the engine).

TopgunZ · 03-08-2021, 01:50 PM

Quote:

Originally Posted by theDreamer

I will be curious how you are going to be ‘completely’ different, mounting a SC with a belt and running pipe in our engine bay is very limited. Even with most TT kits the design is fairly similar you really just get option between turbo type & intercooler. The big changes come in fuel delivery, tuning, and engine build.

I think the 350z guys got the C38R into a few builds and saw some fairly positive builds, I think with the 370z you either had the GTM kit already and not much sense in an upgrade or waiting to see if someone builds a new kit with Rotrex.

Overall this should do wonders for the 370z FI folks, now we have a real viable SC option with some modern updates, with plenty of TT, and of course BP for T.

GTM used the C38-91 as a max blower. They mounted the SC down under the manifolds with the filter so close it would actually melt, meaning it would ingest a ton of heat. The improved version which moved the filter away took some harsh bends in order to do so which as we all know restricts power.

How many 350z guys can you show me that made the swap to a C38R-112? I know of one and he gained 5psi with the same belt setup and harsh charge piping. He was running a pulley setup that was initially designed around an 81 and not a 112. They designed their kits with looking stock before performance so they had to smash a small intercooler inbetween the factory crash bar and the radiator shroud so it is undersized for these newer power levels....etc..

TopgunZ · 03-08-2021, 01:59 PM

Quote:

Originally Posted by theDreamer

The problem with ‘big numbers’ in a SC build is you won’t really see the same results as a TT build. The twin turbo kits are amazing and provide some great head room if you get into a built engine, where the SC kits can do solid numbers but once you start down the engine building route you realize a TT kit just gets you more.

My view, or opinion, was always the SC was a solid power plant and delivery for folks who did not want to get into the power race. You can get solid numbers and have an amazing car, but if you want to play at the top of the power scale you are better off investing in a TT kit (and of course the engine).

The question here is what is considered "built motor" range? When I first bought my Z, 12 psi was considered the max amount of boost you could throw at it with it being safe. That was in 2014. Now we have guys pushing all sorts of numbers and the "whats safe" is very arbitrary. How long will it last? How hard do you drive it? What supporting mods do you have?..etc.
There are guys stating to make 800whp on the stock block.

That is not the point here. I am not introducing this kit to be the most powerful kit on the market. The point is that there will be a supercharger option which will be $6250 for a tuner kit that will make the most power out of the box available for our platforms and it has the ability to realize minimal loss if you prefer to run a filter. A lot of guys like superchargers (for numerous reasons) and this kit will just make sense compared to anything available for dollar per hp fun.

Most sensible guys would be happy with fully filtered air while still having 550+whp on a supercharger and having a reliable setup.

Right now there isnt a single supercharger kit on the market that can bring the VQ to its limits without stressing the supercharger by way overspinning it and without stressing the engine by running a turboguard, which filters nothing but a gigantic rock.

And of course there are numerous other benefits as described on the first post.

theDreamer · 03-08-2021, 03:23 PM

Quote:

Originally Posted by TopgunZ

GTM used the C38-91 as a max blower. They mounted the SC down under the manifolds with the filter so close it would actually melt, meaning it would ingest a ton of heat. The improved version which moved the filter away took some harsh bends in order to do so which as we all know restricts power.

How many 350z guys can you show me that made the swap to a C38R-112? I know of one and he gained 5psi with the same belt setup and harsh charge piping. He was running a pulley setup that was initially designed around an 81 and not a 112. They designed their kits with looking stock before performance so they had to smash a small intercooler inbetween the factory crash bar and the radiator shroud so it is undersized for these newer power levels....etc..

Actually, the terrible bends were part of the stage 1 kit, I had the original and it was a terrible design. The move away from that into a straighter pipe and the filter under the exhaust manifold was the compromise so higher boost to be reached. Not sure who has had a melted filter or intake issues but curious on that one, been running the 1.5 kit with the straighter pipe for many years with intake temps 5-8 above ambient in Texas summer with no issues.

Just like this forum I keep an eye on the 350z side and read up on all the builds I can find, not saying they were magical numbers made, just that the 350z guys got into the C38R already.

I never said you were producing this for high numbers, that was directed at another user here. I am happy to see another shot with a supercharger with the Rotrex because I think it provides the best power band for our car and real gains. The original response was with someone saying the 370z has not seen a Rotrex tested on this car, which it has for many builds with high success. Just as you said, in the early 2010 days 500whp was crazy high so the early SC folks hit 400-450whp and stopped and very few went after the high numbers until you brought a real kit (Stillen with A2A) to market.

TopgunZ · 03-08-2021, 04:04 PM

Quote:

Originally Posted by theDreamer

Actually, the terrible bends were part of the stage 1 kit, I had the original and it was a terrible design. The move away from that into a straighter pipe and the filter under the exhaust manifold was the compromise so higher boost to be reached. Not sure who has had a melted filter or intake issues but curious on that one, been running the 1.5 kit with the straighter pipe for many years with intake temps 5-8 above ambient in Texas summer with no issues.

Just like this forum I keep an eye on the 350z side and read up on all the builds I can find, not saying they were magical numbers made, just that the 350z guys got into the C38R already.

I never said you were producing this for high numbers, that was directed at another user here. I am happy to see another shot with a supercharger with the Rotrex because I think it provides the best power band for our car and real gains. The original response was with someone saying the 370z has not seen a Rotrex tested on this car, which it has for many builds with high success. Just as you said, in the early 2010 days 500whp was crazy high so the early SC folks hit 400-450whp and stopped and very few went after the high numbers until you brought a real kit (Stillen with A2A) to market.

Here is one instance of a melted filter which you replied to.
Supercharger air filter replacement

Again, there is only one guy (that I have ever seen) that tried the C38R on the 350Z and he seen a 5.2psi gain on a pulley and intercooled system designed for a much smaller head unit. It was goatofrafin.

theDreamer · 03-08-2021, 04:26 PM

Quote:

Originally Posted by TopgunZ

Here is one instance of a melted filter which you replied to.
Supercharger air filter replacement

Again, there is only one guy (that I have ever seen) that tried the C38R on the 350Z and he seen a 5.2psi gain on a pulley and intercooled system designed for a much smaller head unit. It was goatofrafin.

I am looking forward to your results.

kromberg · 03-09-2021, 03:56 AM

Subscribed. Definitely interested. What do you think the timeframe will be for production?

TopgunZ · 03-09-2021, 09:10 AM

Quote:

Originally Posted by kromberg

Subscribed. Definitely interested. What do you think the timeframe will be for production?

We are planning to be on the Dyno next week. Then we will release it on our site. It will kind of depend on first come first serve basis at that point. I will update the site with expected ship dates as we go. I have a pretty good amount of parts showing up so I am hoping to minimize the waiting list.

SS_Firehawk · 03-09-2021, 12:36 PM

I had to clean the kit I bought because there was melted filter in the housing. I've been thinking of using some form off heat shield or reflective tape or something to prevent it.

TopgunZ · 03-09-2021, 01:28 PM

Quote:

Originally Posted by SS_Firehawk

I had to clean the kit I bought because there was melted filter in the housing. I've been thinking of using some form off heat shield or reflective tape or something to prevent it.

Facts....

Last time I checked, engines like cold air.

HapaZ · 03-12-2021, 11:54 AM

Can't wait Aaron! Thanks for continuing to develop your kit and looking forward to purchasing for my 40th birthday!

TopgunZ · 03-13-2021, 10:35 PM

Soon!

HOODEY · 03-20-2021, 10:32 AM

Its amazing it took so long for someone to come up with this solution. The key is the jack shaft pulley. Where can these be pulleys be sourced?

edub370 · 03-21-2021, 11:44 PM

Did this kit ever hit the rollers??

TopgunZ · 03-22-2021, 07:59 AM

Quote:

Originally Posted by edub370

Did this kit ever hit the rollers??

Still perfecting the casted aluminum section. I thought this would have been done a couple of weeks ago. I am now scheduled for next week.

03-09-2021, 12:36 PM	#54 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	I had to clean the kit I bought because there was melted filter in the housing. I've been thinking of using some form off heat shield or reflective tape or something to prevent it. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

03-12-2021, 11:54 AM	#56 (permalink)
HapaZ Base Member Join Date: Sep 2014 Location: NorCal Posts: 245 Drives: 2012 370z Base Coupe Rep Power: 11	Can't wait Aaron! Thanks for continuing to develop your kit and looking forward to purchasing for my 40th birthday! TopgunZ likes this.

03-13-2021, 10:35 PM	#57 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	Soon! scratchdvinyl, Rusty, Optimiser and 5 others like this. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

03-21-2021, 11:44 PM	#59 (permalink)
edub370 A True Z Fanatic Join Date: May 2011 Location: KCMO Posts: 3,458 Drives: 09 370z S/T 6MT Rep Power: 20	Did this kit ever hit the rollers?? __________________ 09 370Z ST 6MT//Injen CAI//Greddy CBE//TP//TSW's//Swifts//Stillen lip//Whiteline sways 326whp/268tq

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03-09-2021, 03:56 AM	#52 (permalink)
kromberg Base Member Join Date: Apr 2012 Location: Colorado Posts: 93 Drives: 2013 Nismo Rep Power: 13	Subscribed. Definitely interested. What do you think the timeframe will be for production?

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HOODEY Base Member Join Date: Aug 2013 Location: Barbados Posts: 41 Drives: Uk spec 08 350z gt Rep Power: 12	Its amazing it took so long for someone to come up with this solution. The key is the jack shaft pulley. Where can these be pulleys be sourced?

***Topgunz ROTREX C38R Supercharger Kit***

Topgunz ROTREX C38R Supercharger Kit