***Topgunz ROTREX C38R Supercharger Kit***

DrBacon

To be fair the old kit is easily possible to hit 15psi with that tiny filter, seems most people can't figure out proper belt tension to save their lives. I was at 15psi with a fresh filter, now after a year of almost daily driving the car without cleaning the filter it's only down to 14psi.

Anyways, the new kit looks amazing, good job. Love seeing the constant progress being made with this platform.

Optimiser

Can you prove/validate your 15psi? Pulleys, SC rpm, SC trim, SC bearing upgrade, accuracey of boost gauge, etc? How do you know people making less than 15psi is due to belt slip? How did you figure out and know "proper belt tension"?

DrBacon

Sure do. I can grab datalogs from my laptop tomorrow if you are still interested (rather do this via PM's though, just remind me). The big thing was swapping the supercharger to the RPM belt, the "normal" one is a constant losing battle between trying to tension it just for it to stretch and be loose again. Not one problem since.

TopgunZ

I wouldnt say "easily possible" since I have never seen anyone make 15psi with it. Not saying you didnt but there have been many of these kits sold and I have never seen one make any decent power with that filter on.

What is considered almost daily driving? 10,000 miles? That means every year you have to remove the entire supercharger and reinstall it to clean your filter. Also, I see that filter gets completely smashed from engine movement. Even after cleaning it I am pretty sure it will not bring in the same psi as it did when it was new. It physically loses surface area, something it cant afford.

Plus just the fact that knowing every time you drive your car it is losing psi/power is kind of strange.

I know I am calling the kettle black here since this was my design and I appreciate the feedback to help the community understand facts. (unlike facebook)

In your below comment you have stated you had to modify the kit in order to gain boost. When I say 12 psi that is because that is what the competition sends out to the customer. Yes its possible to modify it to make more boost. You could have done this by overdriving the head unit even further also.

The point is "here is what you get when you order a Rotrex kit Vs. here is what you get if you order the competitor kit". Nothing needs to be done to the Rotrex kit at all in order to make more power than most people know what to do with instead of constantly modifying and trying to figure out how to make these Vortech kits make more power.

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ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

DrBacon

Don't get me wrong, I am in no way trying to diminish the new kits capabilities. I know it will be superior to the previous kit(s) in virtually every way. I despise that stupid filter, I have offered several shops good money to come up with a custom solution to it and none of them even wanted to try.

INFmstrTech

Stillin plenum with A2A setup....15.2 psi with a v3 SCi trim 2.87 serpentine pulley, 3.47 jackshaft pulley, 2.95 supercharger pulley, K&N filter. Validated through EcuTek data log. I’m sure if I had an Si or upgraded Ti trim and no filter it may be more...but that v3 can’t take that abuse for long before the oil slinger is destroyed and is eaten by the gears-trust me on that.

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‘08 coupe w/Stillen SC, Custom A2A, SD, ID1050x, e85, eagle rods, high temp coated pistons, P&P heads, JWT C2, manual swap, stage 2 clutch. EcuTek(Eugene)

Optimiser

I have also have Stillin plenum with A2A setup but about 2000rpm slower with my pulley sizes (checked with Vortex calculator), but with upgraded Si trim and only get 10psi. I'm also running the "standard" belts on serp and SC. Are you using the Gates "RPM" belt(s)?
I have ordered these to see if they will help with boost, otherwise I have no idea how you could get 50% more boost than me, but would love to know.

DrBacon

It does happen. I have nothing more than a stock v3 SI and an RPM belt on the supercharger side (planning on trying to add one to the serp side as well as an experiment in the near future). I really can't stress enough how much of a difference that RPM belt makes. That normal belt stretches VERY quickly and begins to slip as a result. The last dyno run I did with the "normal" belt was at 10.5psi because of how bad it got.

I don't think we should continue to derail Topgunz topic with this old kit talk though.

INFmstrTech

[QUOTE= I don't think we should continue to derail Topgunz topic with this old kit talk though.[/QUOTE]

Agreed, just wanted to relay how it was achieved. That being said...I would MUCH MUCH rather move to the rotrex setup. Much easier to reach HP #’s(if your chasing that), the efficiency of the supercharger to me is one of the biggest pros; plus I HATE the Stillen manifold...I have the jx/qx60/maxima(whatever you want to go with there) T/B’s and adapters that absolutely do not fit because of the location of the Stillen mounting for the stock t/b. Having the stock manifold would just be that much better, especially with the bigger t/b’s. Super impressive Topgunz-keep up the fantastic work!

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‘08 coupe w/Stillen SC, Custom A2A, SD, ID1050x, e85, eagle rods, high temp coated pistons, P&P heads, JWT C2, manual swap, stage 2 clutch. EcuTek(Eugene)