***Topgunz ROTREX C38R Supercharger Kit***

Originally Posted by TopgunZ

This is great to hear. Glad the 100s of hours getting this system dialed in and fitting 10lbs of shiz in a 5lb bucket is worth it. These imports are hell in the bay. My turbo raptor was like working around an empty pool.

Did you guys know I have to remove and machine every Rotrex compressor cover just to get it to fit? That's the kind of spacial constraints I was against here. I also machine/bore out every inlet to make sure the intake is as capable as possible. It's hard to explain but it's the little things that matter.

Originally Posted by Mr.K

Seriously man your kit is living up to the hype . And that's so true, the engine bays are super cramped, another reason why going TT would've been a nightmare for servicing . That's the type of dedication and determination that we as a community appreciate . Would love to hear all the little changes that went into this kit!

Originally Posted by TopgunZ

That's lots of little secrets but can't spill them all.

One I'd like to point out that again people don't consider is we send a brand new machined ribbed idler pulley with the kits where the "other" SC kits require you to reuse pulleys from the car. If you have a high mileage car that bearing set is already stressed. Then there's the belt wrap that eliminated belt slip. Do you know how many anti slip pulleys I sell off my site to stillen and Soho kit owners? Alot. No need to purchase additional add ons to this Rotrex setup. It was designed with 800whp in mind from the beginning.

We are actually creating 3 different pulley setups now. You will be able to select the standard set, race set or Max set. We need to test these still but the max setup will come with Carbonite coated pulleys and cost more but will be reserved for built motors only.

Check out Carbonite coatings if you haven't seen or heard of it. There's also a high grip option called reichard.

We will always strive to improve. Most of the time I'm not even sure what that is until it happens. Lol .

Originally Posted by TopgunZ

We are actually creating 3 different pulley setups now. You will be able to select the standard set, race set or Max set.

Originally Posted by 14Q60awdSPORT

This isn't 100% exact, but still a good illustration of what is happening and comparing the different boost "maps" Also added a typical TT for comparison.

A traditional "normal" centrifugal SC setup will choose a pulley for desired max psi IE 10 psi pulley will make 10 psi at 7500rpm, but only about 4.5psi at 3.5k rpm.

The topgunz kit will make about 23psi at 7500rpm, letting it make 10psi at 3.5k rpm. if you targeted 10psi the entire time you would bleed off through the BOV the excess boost over 10psi, so at 7500rpm you would be bleeding off about 13psi. your boost would follow the orange line until it hit the green line then follow the green line to redline.

at 3.5k rpm you are making 5.5psi more vs a traditional centrifugal SC setup which will result in a lot more torque/power in the mid range.

or compare orange to green following green vs the blue line, all the area in between those lines is the extra boost you are making through the entire curve despite both setups making 10psi peak.

and then you obviously have way more headroom to turn up the topgunz kit if desired without needing pulling changes.

Originally Posted by 14Q60awdSPORT

This is what I'm really interested in.

What would the psi of the "Standard" pulley be?

With my current setup/tune I could keep my map exactly same on a 16psi pulley and not be spinning the SC as much all the time.

Originally Posted by TopgunZ

That's lots of little secrets but can't spill them all.

We are actually creating 3 different pulley setups now. You will be able to select the standard set, race set or Max set. We need to test these still but the max setup will come with Carbonite coated pulleys and cost more but will be reserved for built motors only.

Check out Carbonite coatings if you haven't seen or heard of it. There's also a high grip option called reichard.

We will always strive to improve. Most of the time I'm not even sure what that is until it happens. Lol .

Originally Posted by osmosizzz

Have you looked into grip-tec? I had a buddy run Carbonite and he was going through belts often. I went the griptec route and change belts once every 8-10 months. This is a 6 rib powering the rotrex C38R. Currently it holds 17psi with a wastegate duty set at 45

Love what you've done with the C38R on this platform btw. Uploaded is a dynongraph on what the C38R does on a 3.7L Honda single cam V6 for comparison. The C38R is a beast in such a small package

Originally Posted by TopgunZ

That's what I wanted to use but they won't process my custom pulleys. They only sell the application on their pre made pulleys. At least that's the story i got from a guy that works there.