Resolution for broken KW C38 blower pulley bolt that breaks?

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Jul 3, 2015 | 11:24 AM

#81

leo520

Joined: May 2007

Posts: 5,491

Likes: 12

Quote:

Originally Posted by michaelnyden

Quote:

Originally Posted by leo520

questions:
what psi r we looking for ap2
c38-91 90mm @8000 rpm
c38-91 85mm @8000 rpm

thx.

and have u shipped out the father's day order yet, i had been waiting for almost 2 weeks now

From my understanding as explained to me by a vendor on here, the C38 can spin to maximum of 90K rpm. The kit comes with a 90 or 100mm pulley and has these options as upgrades from Kraftwerks:

AP1 Comes with 128mm Crank + 100mm S/C Pulley for 9150Rpm Redline @ 12.5psi
Option 1. AP1 128mm Crank + 95mm S/C Pulley for 8900Rpm Redline @ Approx 14.5Psi
Option 2. AP1 128mm Crank + 90mm S/C Pulley for 8450Rpm Redline @Approx 16.5Psi

AP2 Comes with 128mm Crank + 90mm S/C Pulley for 8200Rpm Redline @ 13psi
Option 1. AP2 128mm Crank + 85mm S/C Pulley for 8000Rpm Redline @ Approx 14.5Psi
Option 2. AP2 128mm Crank + 80mm S/C Pulley for 7600Rpm Redline @Approx 16.5Psi

Obviously there are many other atmospheric/climate factors and accuracy of boost guages that can effect what people are seeing. I'm sure if someone went with something like a pwr intercooler or after cooler on this kit, even more boost can be picked up.

thx

Jul 3, 2015 | 11:33 AM

#82

Habitforming

Joined: Apr 2003

Posts: 3,244

Likes: 4

From: Northern KY

Fwiw my ap2 has seen as high as 17 psi. This is in my ecu logs for 3rd gear tuning pulls, and on a very cool evening. 8400rpm redline, c38-81 and 90mm pulley.

Now that it's warmer, I'm peaking around 15.

Jul 3, 2015 | 01:38 PM

#83

leo520

Joined: May 2007

Posts: 5,491

Likes: 12

Quote:

Originally Posted by Habitforming

n whats the numbers u r pushing?

Jul 3, 2015 | 02:29 PM

#84

Habitforming

Joined: Apr 2003

Posts: 3,244

Likes: 4

From: Northern KY

Etuned, so I have no numbers...

Going to try to get it on a local dyno this summer, but didn't have anyone here I wanted to work with on tuning it

Jul 3, 2015 | 02:51 PM

#85

06S2k07Si

Joined: Sep 2005

Posts: 1,941

Likes: 47

From: Baraboo, WI

Quote:

Originally Posted by Habitforming

Etuned, so I have no numbers...

Going to try to get it on a local dyno this summer, but didn't have anyone here I wanted to work with on tuning it

If you want to you could read your map sensor with this adapter and the Torque app...it works quite well.

http://www.amazon.com/gp/aw/d/B005NL...Y8ABAJFAV2SAGG

https://play.google.com/store/apps/d...Cs_KogSHwaqABQ

Jul 3, 2015 | 05:44 PM

#86

Habitforming

Joined: Apr 2003

Posts: 3,244

Likes: 4

From: Northern KY

Quote:

Originally Posted by 06S2k07Si

Quote:

Originally Posted by Habitforming

Etuned, so I have no numbers...

Going to try to get it on a local dyno this summer, but didn't have anyone here I wanted to work with on tuning it

I actually already have that adaptor and torque pro... But I thought aem v2 doesn't output any data to obd2. To be honest, I've never tried though.

I have a boost gauge on a separate sensor, and though it's hard to keep an eye on when at the the top of 3rd, I know I've seen 16 a couple times.

Jul 3, 2015 | 09:31 PM

#87

Habitforming

Joined: Apr 2003

Posts: 3,244

Likes: 4

From: Northern KY

well guys you insisted on numbers, so here are some REALLY ACCURATE

ones:

That's right, 438 dyno proven HP

and the datalog used:

Jul 3, 2015 | 09:42 PM

#88

soulicious

Joined: Sep 2008

Posts: 1,126

Likes: 7

From: Bay Area, CA

Take it to a real dyno, lol. I've seen 550whp for my virtual dyno and just took it as a grain of salt.

Jul 3, 2015 | 10:46 PM

#89

Habitforming

Joined: Apr 2003

Posts: 3,244

Likes: 4

From: Northern KY

Quote:

Originally Posted by soulicious

Take it to a real dyno, lol. I've seen 550whp for my virtual dyno and just took it as a grain of salt.

Yeah I'm looking into it... eventually

Jul 7, 2015 | 10:06 AM

#90

KraftWerks

Former Sponsor

Joined: Nov 2008

Posts: 73

Likes: 0

Quote:

Originally Posted by michaelnyden

I thought the AP2 only dynoed 15whp higher on the same dyno and same kit? You are saying the AP1 would require a header, exhaust would require the 95mm pulley and E85 to just reach 425-435whp? I would think the AP1 could reach that without E85 and much higher with.

Not too much have been reported back and most that are have been AP2... early on the numbers were that close, yes but it seems the average numbers are significantly higher than originally established. The guy below is seeing 460whp on his AP1 so you're definitely correct in saying they should be much higher than what I previously mentioned - maybe just used to seeing lower reading dynos like our Rototest.

Quote:

Originally Posted by gfresh86

Honestly save your money on a header and just do the c38 91 upgrade which is only 300 bucks. Stock 100mm pulley on ap1 and i was pushing 16psi and 460whp. Stock header and 70mm exhaust.everytjing else stock.

Any sort of graphs on that? We'd love to share. Very nice figures!

Quote:

Originally Posted by leo520

questions:
what psi r we looking for ap2
c38-91 90mm @8000 rpm
c38-91 85mm @8000 rpm

thx.

and have u shipped out the father's day order yet, i had been waiting for almost 2 weeks now

I believe the PSI question was established already but if you want to PM me the name that would've been on your order and whether you ordered directly or via distributor, I will look into this and see what's going on with the shipment.

- CJ

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