Rotrex C38 Kraftwerks log
Joined: Dec 2007
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From: Midwest
Originally Posted by KraftWerks' timestamp='1395791048' post='23081104
@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"...
There has been a lot said in this thread, we weren't ignoring or dodging your question "Redline S2K"...
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Originally Posted by cvjoint' timestamp='1395740923' post='23079827
[quote name='KraftWerks' timestamp='1395677630' post='23078293']We've been very transparent in the process of helping the few customers that have had issues. We made "cvjoint" numerous offers and he refused all of them and proceeded to contact his credit card company, rather than getting a refund from the dealer he purchased it from. Again, we all enjoy cars here at Kraftwerks, so we recognize how much of "bummer" it can be when you don't have everything you need.
[/quote]
When Amazon ships something incorrectly they issue an RMA in a day. I gave you and the distributor over a week to figure out the return logistics and then contracted my credit card when it was clear you had no intentions on making good on your promise. I made my intentions clear and you still didn't budge.
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Great question, no it is not at max RPM out of the box, depending on what the vehicle customers will have 200-500 more RPM to play with, which will cause boost to increase also.
As for the pulley's, yes they will work on the C38-91. The pulleys will still work on the 91 blower, The psi will still be the same as the 38-81. Yes the 91 has more potential but the restriction with this kit is the piping and intercooler. If you want more power you need to go with the TTS kit, or run this kit with better piping and intercooler.
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200-500rpm more can be had 
So yeah basically the blower is maxed out of the box. Roughly 1psi or one size smaller pulley isnt exactly room for much improvement. and which is it 200 or 500rpm?
The best way to answer this question though Krafworks, without creating any confusion, is to say for example the blower we are using maxes out at say 110k rpm, and the pulley we provide in the ap1/ap2 S2000 kits gets the blower up to 100k rpm. If you want to max out the blower on your kit then "XX size pulley is required at xx engine rpm". This however has not been broken down yet, no max blower rpm, no pulley size related to rpm to reach that, yet is the only way to be specific about what the capabilities and expectations of the blower.
A novi 1200 max rpm is 52,000 rpm, it produces 1150cfm. With a 3.2" pulley it reaches this rpm/cfm on an s2000 at 8350 rpm. This is crucial information if you are trying to maximize the set up or at least understand what pulley to use for a given limitation. Your answers are very vague. Why?
So yeah basically the blower is maxed out of the box. Roughly 1psi or one size smaller pulley isnt exactly room for much improvement. and which is it 200 or 500rpm?The best way to answer this question though Krafworks, without creating any confusion, is to say for example the blower we are using maxes out at say 110k rpm, and the pulley we provide in the ap1/ap2 S2000 kits gets the blower up to 100k rpm. If you want to max out the blower on your kit then "XX size pulley is required at xx engine rpm". This however has not been broken down yet, no max blower rpm, no pulley size related to rpm to reach that, yet is the only way to be specific about what the capabilities and expectations of the blower.
A novi 1200 max rpm is 52,000 rpm, it produces 1150cfm. With a 3.2" pulley it reaches this rpm/cfm on an s2000 at 8350 rpm. This is crucial information if you are trying to maximize the set up or at least understand what pulley to use for a given limitation. Your answers are very vague. Why?
Joined: Sep 2005
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From: Baraboo, WI
Originally Posted by s2000Junky
200-500rpm more can be had So yeah basically the blower is maxed out of the box. Roughly 1psi or one size smaller pulley isnt exactly room for much improvement. and which is it 200 or 500rpm?
The best way to answer this question though Krafworks, without creating any confusion, is to say for example the blower we are using maxes out at say 110k rpm, and the pulley we provide in the ap1/ap2 S2000 kits gets the blower up to 100k rpm. If you want to max out the blower on your kit then "XX size pulley is required at xx engine rpm". This however has not been broken down yet, no max blower rpm, no pulley size related to rpm to reach that, yet is the only way to be specific about what the capabilities and expectations of the blower.
A novi 1200 max rpm is 52,000 rpm, it produces 1150cfm. With a 3.2" pulley it reaches this rpm/cfm on an s2000 at 8350 rpm. This is crucial information if you are trying to maximize the set up or at least understand what pulley to use for a given limitation. Your answers are very vague. Why?
So yeah basically the blower is maxed out of the box. Roughly 1psi or one size smaller pulley isnt exactly room for much improvement. and which is it 200 or 500rpm?The best way to answer this question though Krafworks, without creating any confusion, is to say for example the blower we are using maxes out at say 110k rpm, and the pulley we provide in the ap1/ap2 S2000 kits gets the blower up to 100k rpm. If you want to max out the blower on your kit then "XX size pulley is required at xx engine rpm". This however has not been broken down yet, no max blower rpm, no pulley size related to rpm to reach that, yet is the only way to be specific about what the capabilities and expectations of the blower.
A novi 1200 max rpm is 52,000 rpm, it produces 1150cfm. With a 3.2" pulley it reaches this rpm/cfm on an s2000 at 8350 rpm. This is crucial information if you are trying to maximize the set up or at least understand what pulley to use for a given limitation. Your answers are very vague. Why?
Quote
Opened up the KW kit boxes. Crank pulley is 40 teeth/100mm and blower pulley is 28 teeth/70mm. 8300 rpm red line and 1.428 ratio through the pulleys gives 11,850 rpm on the C38-81 input shaft. Rotrex site says 12,000 rpm is peak input shaft speed.
If this info is correct it is truthfully only 150rpm from the Rotrex's max speed.
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Stock pulley on 2.2L(100mm/70mm), engine max speed must be 8400rpm engine = 12000rpm blower.
Stock pulley on 2.0L(100mm/80mm), engine max speed must be 9600rpm engine = 12000rpm blower.
Joined: Sep 2005
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From: Baraboo, WI
Originally Posted by dduaime
Engine rpm
Stock pulley on 2.2L(100mm/70mm), engine max speed must be 8400rpm engine = 12000rpm blower.
Stock pulley on 2.0L(100mm/80mm), engine max speed must be 9600rpm engine = 12000rpm blower.
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Regardless, if its 150-200-500rpm, it isn't crap when you consider how much boost/cfm that equates to. Its basically maxed out of the box. So what ever people are seeing on the dyno, that should be your expectation.
Joined: Sep 2005
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From: Baraboo, WI
For those interested...
Rotrex C38 info here:
http://www.rotrex.com/media/2422dbda...38%20Range_pdf
Technical handbook:
http://www.rotrex.com/media/5fd67e23...20Handbook_pdf
Rotrex C38 info here:
http://www.rotrex.com/media/2422dbda...38%20Range_pdf
Technical handbook:
http://www.rotrex.com/media/5fd67e23...20Handbook_pdf