Rotrex C38 Kraftwerks log

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Apr 12, 2014 | 05:51 AM

#181

iLLap2

Registered User

Joined: Dec 2013

Posts: 89

Likes: 0

Thanks guys! I was hoping people here would respond positively. I was rly happy. Hopefully I can get better fuel and retune. Man the small town I live in doesn't have E-85 for 1.5hrs away.. So I'm going to have to get a barrel..

Apr 12, 2014 | 06:09 AM

#182

Nik2k

Registered User

Joined: Mar 2013

Posts: 436

Likes: 1

From: Cordoba

AMAZING! results with 91 OCT BRO! congratulations!! yo put BC CAMS and the manifold? or not ? NICE CURVE!!

Apr 12, 2014 | 06:17 AM

#183

06S2k07Si

Joined: Sep 2005

Posts: 1,941

Likes: 47

From: Baraboo, WI

Hmm...I've seen the same 417whp before on another car with this kit. The kit seem repeatable. Were you logging about 11psi? Not too bad.

Apr 12, 2014 | 06:23 AM

#184

xLostx

Registered User

Joined: Jul 2007

Posts: 113

Likes: 0

From: Calgary

Nice power, how many psi?

Apr 12, 2014 | 07:14 AM

#185

beechx1

Registered User

Joined: Aug 2009

Posts: 230

Likes: 6

From: Kansas City

Great numbers. Was that 417 WHP on 91 octane with stock exhaust and completely stock engine?

Apr 12, 2014 | 08:38 AM

#186

camuman

Joined: Oct 2002

Posts: 8,044

Likes: 6

From: South Florida

Quote:

Originally Posted by iLLap2

Quote:

Originally Posted by iLLap2

http://imageshack.com/a/img849/8673/aul7.jpg

This was a conservative tune. I had 91oc fuel. Had alittle more left in it if I had better fuel.

After summer I'm going back at it with a high flow cylender head, use my Magnus, E-85... Those will be much bigger numbers.

Flame suit on. Numbers are nice. But don't expect massive increase with fuel change unless you raise the boost.

Apr 12, 2014 | 09:07 AM

#187

Redline S2K

Joined: May 2010

Posts: 3,422

Likes: 2

Nice numbers lilap2. How much boost and what mods (besides KW kit) do you have?

Apr 12, 2014 | 09:42 AM

#188

xLostx

Registered User

Joined: Jul 2007

Posts: 113

Likes: 0

From: Calgary

Quote:

Originally Posted by iLLap2

Quote:

Originally Posted by s2000442

Details about setup like blower model, race kit?, fuel used, injectors, intake restrictor etc. Look forward to results. Sent from my SAMSUNG-SGH-I337 using Tapatalk

Kraftwerks high boost race kit c38-81
BC Stage 2 cams
Supertech Dual titanium valve springs
1000cc injec / 320lph pump
ASP Custom made big tube header
Magnus high flow intake mani
Skunk2 72mm throttle body
Hondata 4bar map sensor
Clutch masters clutch
Clutch masters Lighter flywheel
Invidia Titanium exhaust
Invidia 70mm test pipe
Stoptech Rotors
Hawk pads
Defi gauges
Prolly more I can't remember

Here's his parts list.

If he has the 81, can he even up the boost or is it maxed now? Switching to e85 even worth?

Apr 12, 2014 | 11:56 AM

#189

iLLap2

Registered User

Joined: Dec 2013

Posts: 89

Likes: 0

Quote:

Originally Posted by xLostx

Here's his parts list. If he has the 81, can he even up the boost or is it maxed now? Switching to e85 even worth?

I didn't get to install my Magnus. I'm on 12lbs.

Apr 12, 2014 | 12:04 PM

#190

Redline S2K

Joined: May 2010

Posts: 3,422

Likes: 2

Quote:

Originally Posted by xLostx

Quote:

Originally Posted by iLLap2' timestamp='1396354783' post='23091143

Quote:

Originally Posted by s2000442

Details about setup like blower model, race kit?, fuel used, injectors, intake restrictor etc. Look forward to results. Sent from my SAMSUNG-SGH-I337 using Tapatalk

Here's his parts list.

If he has the 81, can he even up the boost or is it maxed now? Switching to e85 even worth?

According to the math and pulley sizes used with this kit, not by much.

(crank pulley)/(blower pulley) * (drive ratio) * (redline) = (impeller speed)

100mm / 70mm * 7.5 * 8 (don't know his redline) = 85,714 impeller speed.

Max speed for the c38 units is 90,000. He could up his redline to 8400 (I'd go 8300), which would put impeller speed at 90,000 and increase boost. I'm really curious about the amount of boost coming out of the rotrex unit outlet.

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