I have had a few issues with my kit, which have been addressed by CJ at Kraftwerks. I was missing the 4-bar map sensor, which didn't affect the car at 4,000 to 5,000 feet in elevation where I live. I was also missing the final connector between the intake manifold and last charge pipe. KW supplied me with those items when asked.

Also, the cogged belt and belt tension has been an issue. As KW said to me verbally, you have to adjust belt tension to 75hz on the longest unsupported length of belt when not running. I used the Conti Tension 2 Go smart phone app to adjust the tension. This is about 3/8" clearance between the mounting plate and tension pulley slide block.

Lastly, apparently the supercharger and crank pulleys were machined with a profile that did not exactly match the Gates Twinpower double-sided cogged belt cogs (teeth). KW sent me newly machined pulleys, which have the correct cog profile to match the belt (I checked it myself) and I will install these newly machined pulleys tomorrow.

Other than these issues, the kit is running very well on the car. I am hoping to dyno the car in April when my weekend schedules are more slack.

I was only hoping for 400 rear whp on this setup, as I do not want to beef up any other components on the car. I think KW has worked out all of the bugs at this point, and I will be happy if the new pulleys work properly.

 

Funny you say that, KW told me new pulleys are re-invented to make them lighter. As if anyone would believe that a company that ships incomplete and haphazardly engineered products will spend time to shave a milligram of metal here and there. You seem to be the only one that was told the truth, either that or you figured it out yourself. As you can see, KW neglected to say so themselves even when I prompted them above.

 

For the record the dealer never offered me a refund and you know that very well as you've been talking back and forth in the last 2 weeks. In the same paragraph you are talking about transparency and you are fabricating a story.
How can you even say that? Why would I go through my credit card company if a refund was available? It makes absolutely no sense. You don't want to take responsibility for shipping incomplete and misengineered product. The dealer doesn't want to accept returns. No one wants to pay the cost for the shortcomings of the kit. The customer is stuck absorbing your R&D expense and inventory shortage costs. We should all drive around with a tool set and spare belts until you decide to complete the work on this kit. I asked for a return address and you said you'd kick the kit back if it showed up at your doorstep. This kit is the dealer's problem because I bought it from him is what you said.

 

They still never answered my original question either. Can you get a pulley that offers more boost? If you guys think the F-series can't handle more than 11psi, you are wrong. If you offer a 91 as an option, +11 psi is needed to take advantage of the bigger blower.

 

@Redline S2k, at this exact moment there are two pulleys that have been machined for S2000 kits, a 70mm and a 80mm. If you are looking to purchase an 00-03 AP1 kit, you will have the option of getting a 75mm pulley or a 70mm pulley, both of which will require you to lower you engine redline. If you have an 04-05 AP1 or a 06-09 AP2 there will be a 67mm pulley available also.

There has been a lot said in this thread, we weren't ignoring or dodging your question "Redline S2K"...

 

Incorrect, you were told not to just haphazardly ship the kit back to us without an RMA and when an RMA# was established we would issue a call tag and even ship it back for free, then you requested that we send you the parts to complete the kit, however you wouldn't cancel the chargeback. Not to mention you proceeded to admit that you would keep the kit even if you were issued the chargeback... Are we supposed to give you parts for a free kit?

 

Incorrect, you were told not to just haphazardly ship the kit back to us without an RMA and when an RMA# was established we would issue a call tag and even ship it back for free, then you requested that we send you the parts to complete the kit, however you wouldn't cancel the chargeback. Not to mention you proceeded to admit that you would keep the kit even if you were issued the chargeback... Are we supposed to give you parts for a free kit?
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There's always two sides to every story. Well I applaud you KW for trying to make things right.

Sent from my SAMSUNG-SGH-I337 using Tapatalk

 

Is the blower at max rpm out of the box?

 

considering what was said above with needing to lower redline to run the smaller pulleys, I would assume so. This wouldn't be worth the trade off though if people recognize the way a centrifugal delivers on this engine, making its peak performance in the top 500rpm of the power band as well as the boost building progressively through the rpm range, again netting the most boost offset in the top end vs the lower and mid range. So the net result would be for example say dropping 30whp at peak to gain 10whp at a lower rpm somewhere in the mid range.

Its my conclusion that most would not find this a worthy option, the motor needs to rev high to be in its efficiency range and make the most out of the sc, with the ap1 being the highest example of this as its the "peakyiest" motor. NOW if you were say running one of the 2.4/2.7 stroker kits, THEN running a smaller mated pulley to that displacement/rev limit would make sense becuase the motor already demands a lower rev limit, shifting its efficiency down in the powerband, so MATCHING the blowers peak efficiency to that engines redline would make sense in this case, and that's what its all about with any of these F motors, matching the blowers efficiency/rpm peak to the engines natural power curve peak.

 

Didn't mean to make it sound like you were dodging me, just wanted an answer. Will these pulleys work on the c38-91 blower and still require lowering redline?