Really bad experience with Kraftwerks C30 supercharger - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

King Tut · 06-23-2015, 10:47 AM

Shouldn't all the pulleys be cogged? That seems to me like it would be the obvious answer.

John92 · 06-23-2015, 11:13 AM

I drove from WA to FL no oil cooler and the only problem I had my whole trip was due to bad fuel. I have not snapped a belt yet, and you should run clogged idler pulleys just saying.

Cheeseballs · 06-23-2015, 12:41 PM

Quote:

Originally Posted by themajesticone

This doesn't happen on the JR kit as far as I have read, no?

lolololol......No. This does not happen with the JR kit. The JR kit actually has good quality and support behind it.

themajesticone · 06-23-2015, 01:55 PM

Quote:

Originally Posted by Cheeseballs

lolololol......No. This does not happen with the JR kit. The JR kit actually has good quality and support behind it.

That is what I understood as well

ATL BRZ · 06-23-2015, 02:23 PM

The KW belts may not regularly break with light street usage, but the cogged design means that they will experience shock when transferring power to the pulleys and when that energy repeats in intense fashion (track abuse) they can only take that shock so many times before giving out.

Quote:

Originally Posted by CSG Mike

Here's an analogy. When drag racing, if you bog your engine and the tires hook.... you'll probably break something. But, if you get wheelspin, all that excess energy, instead of being absorbed by the drivetrain (transmission, driveshaft, differential, axles), gets burned up as tire smoke.

No play = something has to take the force when you do a hard shift. Normal belt systems are intentionally designed to momentarily slip to release the energy. With Kraftwerks, the belt has to take all that load, and it can only do it so many times...

This is why Rotrex doesn't recommend cogged belts/pulleys to drive their superchargers.

KraftWerks · 06-23-2015, 02:55 PM

Quote:

Originally Posted by D K

There is a reason why Rotrex doesnt recommend cogged belt for this application.
Call Jackson Racing and see if they will sell you just the bracket and piping?

Please show us where Rotrex doesn't recommend the cogged system?

Quote:

Originally Posted by Cheeseballs

lolololol......No. This does not happen with the JR kit. The JR kit actually has good quality and support behind it.

Where does a belt failure show poor quality of the kit or poor quality it service?

Quote:

Originally Posted by ATL BRZ

The KW belts may not regularly break with light street usage, but the cogged design means that they will experience shock when transferring power to the pulleys and when that energy repeats in intense fashion (track abuse) they can only take that shock so many times before giving out.
This is why Rotrex doesn't recommend cogged belts/pulleys to drive their superchargers.

Again, please show us where Rotrex has stated the recommendation against a cogged system.

There are plenty of users, some even here, without issues. Rotrex representatives themselves have given many compliments and praise to both the cogged design and divorced belt drive-system that we offer.

ATL BRZ · 06-23-2015, 03:01 PM

Quote:

Originally Posted by KraftWerks

Again, please show us where Rotrex has stated the recommendation against a cogged system.

From http://www.rotrex.com/media/5fd67e23...20Handbook_pdf

Ribbed are the standard as the handbook states. Cogged is non-standard so it's insinuated that they do not recommend them.

D K · 06-23-2015, 03:04 PM

I have an email trail....

Quote:

Originally Posted by KraftWerks

Please show us where Rotrex doesn't recommend the cogged system?

Where does a belt failure show poor quality of the kit or poor quality it service?

Again, please show us where Rotrex has stated the recommendation against a cogged system.

There are plenty of users, some even here, without issues. Rotrex representatives themselves have given many compliments and praise to both the cogged design and divorced belt drive-system that we offer.

D K · 06-23-2015, 03:06 PM

Looks like Atlanta beat me to it....

Anyway, thats the PG13 version.

My conversation was considerably more direct.

slipdog · 06-23-2015, 03:41 PM

Quote:

Originally Posted by ATL BRZ

From http://www.rotrex.com/media/5fd67e23...20Handbook_pdf

Ribbed are the standard as the handbook states. Cogged is non-standard so it's insinuated that they do not recommend them.

Nowhere in that paragraph or in the design specifications in 6.1 or 6.2 does it say to not used cogged pulleys.

ATL BRZ · 06-23-2015, 03:51 PM

Quote:

Originally Posted by slipdog

Nowhere in that paragraph or in the design specifications in 6.1 or 6.2 does it say to not used cogged pulleys.

That insinuation in the user manual that I highlighted along with all the evidence of broken belts from the end users who are tracking KW kits is enough for me to understand that it's not a good idea to use a cogged system regardless of it being explicitly stated.

themajesticone · 06-23-2015, 04:34 PM

Quote:

Originally Posted by ATL BRZ

That insinuation in the user manual that I highlighted along with all the evidence of broken belts from the end users who are tracking KW kits is enough for me to understand that it's not a good idea to use a cogged system regardless of it being explicitly stated.

@slipdog

You can also argue that the fact they specifically put,

"Not following these specifications voids warranty and may result in permanent damage of the supercharger system and/or other systems in the vehicle/application"

...explicitly states it is highly not recommended as well as discouraged because of the above said repercussions.

Andrew025 · 06-23-2015, 06:11 PM

Quote:

Originally Posted by D K

Looks like Atlanta beat me to it....

Anyway, thats the PG13 version.

My conversation was considerably more direct.

I want to see it

Cheeseballs · 06-23-2015, 06:22 PM

Quote:

Originally Posted by KraftWerks

Where does a belt failure show poor quality of the kit or poor quality it service?

One belt failure doesn't do that. Multiple and repeated failures does.

I cannot comment about your service since I have never, nor will ever, buy a Kraftwerks product. Hell, I won't even abbreviate your name because I feel like I am somehow sullying the people who I humbly consider the real KW (the suspension company) by doing so.

I can speak with high regard for Jackson's quality of service since I have experience with them though.

Anyway good luck luck OP. I hope you get all these issues sorted out for the better.

06-23-2015, 10:47 AM	#15
King Tut NASA SpecE30 Racer Join Date: May 2012 Drives: 2006 Honda S2000 Location: Gulf Breeze, FL Posts: 7,279 Thanks: 607 Thanked 5,759 Times in 3,055 Posts Mentioned: 274 Post(s) Tagged: 10 Thread(s)	Shouldn't all the pulleys be cogged? That seems to me like it would be the obvious answer. __________________ - King Tut Street/Track Car: 2006 Honda S2000 TT3 \|\| Race Car: 1987 BMW 325is SpecE30 \|\| Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 \|\| 2013 Subaru BRZ \|\| 2012 Porsche Cayman R \|\| 2009 Chevrolet Z06 \|\| 2009 BMW M3 \|\| 2004 BMW M3 \|\| 2004 Nissan 350Z

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06-23-2015, 03:06 PM	#23
D K Stig's dark passenger Join Date: Dec 2013 Drives: FR-S Location: I work abroad Posts: 724 Thanks: 60 Thanked 316 Times in 186 Posts Mentioned: 20 Post(s) Tagged: 1 Thread(s)	Looks like Atlanta beat me to it.... Anyway, thats the PG13 version. My conversation was considerably more direct.

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