Kraftwerks Supercharger Owners Thread

[pgranberg11]

Originally Posted by Calbee

Hi guys,

I just put on my C30 Blower kit last month, and finally tuned it. As some of you guys might know, the gas up here in Canada is much worse than stateside, and we tend to make less power. From experience, my tuner used to tune Kraftwerk C30 kits for roughly 225-230WHP (235-240 on dynojet), on Canadian Chevron 94 Octane.

I tuned mine last week, and had it all the way up to 255 (268 WHP on Dynojet), which was quite alot more than we expected, with 13.3 PSI up on the top end. Up to 255 WHP there was slight knock, so we tuned it done to 250 with 0 knock everywhere.

I am a little bit iffy on the high PSI number, in terms of reliability. I have called Kraftwerks and asked if it was abnormal to have a C30 making around 13 lb of boost, and they said its a bit high but not abnormal based on the modifications I have.

I just want to hear what other people think, and if I should try to lower the boost (which I do not know how)

My mods that can effect this is as follows:

C30 Blower Kit (I believe it has the standard pulleys but upgraded version)
HKS Equal Length Catted Header
T1R Overpipe
Stock Front Pipe
Tomei 80R
HKS Spark Plugs (1 step colder)
Koyorad Race Radiator

What pulley setup do you have? the only way to make less boost that I am aware of is changing the pulley size to a larger SC pulley. 13 does seem a little high.. but I have seen mine fluctuate. I have a c38 with a standard boost pulley. I've seen it vary from 11-14 depending on temperature and elevation level.

[ST-A]

yes here kits are normally around 11-12.5psi (780-850 grams) with stock pulley and open exhaust.

remember kraftwerks state to limit engine rpm to 7400 in your tune to not overspeed the SC.

[pgranberg11]

new belt, new pulleys to accommodate the wider belt...

[bfrank1972]

Originally Posted by pgranberg11

new belt, new pulleys to accommodate the wider belt...

Do tell - is this something home grown or a new offering by KW?

Edit: duh the pic didn't load for me at first lol

[pgranberg11]

Originally Posted by bfrank1972

Do tell - is this something home grown or a new offering by KW?

Edit: duh the pic didn't load for me at first lol

Sorry I guess I can see where the confusion comes in. The picture is actually from Kraftwerks Instagram account.. I already emailed them asking for info.. still waiting for a reply though. They are basically using the same exact pulley diameter so no re-tune is required. The pulleys and the belt are actually wider. The original belt being 20mm wide, and the new one being 30mm. 30mm ~ .39 inches. It's definitely wider too just looking at the picture. I'm just curious as to how this work since one of the pulleys are a few mm away from the oil filter... My only thing I can think of is that they pushed out the adapter plate further with long brackets attaching the adapter plate to the block... But then that would push the intake further into the bumper, unless there's enough room for the extra 10mm to be pushed out towards the front of the car.

[pgranberg11]

Originally Posted by pgranberg11

new belt, new pulleys to accommodate the wider belt...

So I found the part number for the new belt after doing my own research:

TP1280-8MGT-30 instead of TP1280-8MGT-20... the new belt has an increase in cost of about 20-30 dollars more or less. I'll have to see and keep digging for pulleys.

[pgranberg11]

No new info on pulleys. Kraftwerks got back to me and this is what they stated:

"I believe we finally have these available for actual sale.
$399 is the retail price that I see within the system… so original owners (with proof) would receive the upgrade for $279.99 + Shipping."

I replied asking for a parts list, as in what exactly is included. Just the pulleys and the belt wouldn't cut it since there's barely enough room to begin with. So I'm guessing they have modified the brackets or added spacers to the original ones to push the adapter plate out further to accommodate the wider design. Then pushing the adapter plate out, the intake is also pushed out as well, so I'm curious how they have that worked out.

[Freeman]

Hopefully someone upgrades and tracks the crap out of it. I want to see if the new design is worth the upgrade.

Any news on an autotensioner for the belt?

[pgranberg11]

Originally Posted by Freeman

Hopefully someone upgrades and tracks the crap out of it. I want to see if the new design is worth the upgrade.

Any news on an autotensioner for the belt?

I'm debating on jumping for it. Issue is I have already bought spare belts after my belts snapped on me three times. So I have two extras. So far the last belt I replaced has almost lasted me a year with multiple track events... with two brand new belts left over it's hard for me to switch. I don't think there's an autotensioner. I had this in email from an earlier one from kraftwerks.

"While the same attention should be paid towards monitoring the belt tension, the added surface area and overall strength of the belt allow for a little extra leeway in that regards so you can get away with missing a check or two, etc. and still not have the belt just snap for the sake of snapping."

[Yoda]

So is this their fix for the belt snapping problem?

[Freeman]

Originally Posted by Yoda

So is this their fix for the belt snapping problem?

Might not be a permanent fix likely something to reduce the chances if it happening. Never had a belt snap on mine, but I baby mine and rarely drive it.

[pgranberg11]

Originally Posted by Yoda

So is this their fix for the belt snapping problem?

I don't necessarily think this will be a "set it and forget it" sort of fix. Any supercharger belt in general needs to be paid attention to. But with what kraftwerks was implying in their email is that because of the wider belt it is more forgiving in case you do forget to check it as often as you should. In my opinion, now that I look back on it, their belt snapping problem was the lack of communication, not the design/drive system itself. The instructions that they had were very poor in describing how tight the belt should be as the 21mm rule would change every time the belt would stretch. I've used the half a belt twist method now, and I'm almost on a year with my replaced belt with multiple track events last year, with more coming this year. I still recommend keeping a spare belt or two just in case anything does happen. I've been in the edelbrock thread and even jackson racing's thread (not trying to start which one is better etc, etc), but just to show that any supercharger a belt will get shredded or snapped their too, but not as often due to us having the lack of an auto tensioner.

[Calbee]

Originally Posted by pgranberg11

What pulley setup do you have? the only way to make less boost that I am aware of is changing the pulley size to a larger SC pulley. 13 does seem a little high.. but I have seen mine fluctuate. I have a c38 with a standard boost pulley. I've seen it vary from 11-14 depending on temperature and elevation level.

I actually bought it from someone, but from what I was told it was "upgraded standard pulleys" which I assume are 95mm?

The boost measurement was seen while my tuner was tuning the kit

[pgranberg11]

Originally Posted by Calbee

I actually bought it from someone, but from what I was told it was "upgraded standard pulleys" which I assume are 95mm?

The boost measurement was seen while my tuner was tuning the kit

95mm = standard boost
90mm = high boost pulley
85mm = higher boost pulley

each pulley swap should be around 2-3lbs of boost in jump according to a conversation I had with moto-east since I was debating on upgrading my pulley. Decided to stick normal though. Maybe you are actually running the 90mm pulley. Hard to say though unless you actually look at it, but there's not much room to look once it's mounted.

Actually... I just re-read your original post. You have a cat in your system. I remember the first year I was on track with my stock front pipe with my cat I was getting about 14psi. standard boost pulley c38. fast forward to last track season, I was only reading 11-12psi. Fast forward to a few months ago, I replaced my whole exhaust when I looked at my downpipe, no cat was there. The reason why boost is showing higher is because there is more pressure caused by the cat. Really nothing you should worry about other than your cat eventually melting/blowing out.