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Landracing Forum Home > Tech Information > Technical Discussion (Moderator: Seldom Seen Slim) > New Rotrex C38-91 Supercharger
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Author Topic: New Rotrex C38-91 Supercharger  (Read 2841 times)
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hombre
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« on: January 03, 2011, 04:47:05 PM »
I thought some of you might like first peek at the flow chart for the new Rotrex C38-91 supercharger. It's not yet published on their website.   cool



I can post the PDF for a larger view... but can't figure out how to attach it to my post!  huh
« Last Edit: January 03, 2011, 04:48:59 PM by hombre » Logged
hombre
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« Reply #1 on: March 11, 2011, 08:19:15 PM »
The new blower:
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38flattie
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« Reply #2 on: March 11, 2011, 09:00:18 PM »
Can you email me the PDF?

What's that little baby cost?
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hombre
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« Reply #3 on: March 11, 2011, 09:14:27 PM »
PDF sent.

I believe Rotrex dealers in USA are quoting $2595 retail. Email me back if you're interested, and maybe I can hook you up with a better price.

Note: I'm not a Rotrex dealer and this thread is not an ad... just helping out LSR where I can.
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hombre
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« Reply #4 on: November 29, 2011, 12:40:56 PM »
Where o' where is that C38-91?







If only I'd known it was so much work.  rolleyes
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hombre
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« Reply #5 on: September 06, 2012, 04:40:24 AM »
Please note that the C39-91 and -92 blowers require an 8 rib belt. If you try to get away with a 6 rib belt (as can used on the smaller Rotrex C-30 series) you will get belt slippage at higher blower pressures, leading to erratic engine torque... leading to failure of your dyno torque cell.  embarassed
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hombre
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« Reply #6 on: December 13, 2012, 11:31:40 AM »
Personally, I can't imagine trying to set-up and tune this blower without a state-of-the-art ECU (Motec or Haltec). Invaluable features:

•Fully user-definable 32 x 32 mapping (1024 points)
•TPS tuning with manifold pressure correction
•Wideband closed loop lambda control
•Wideband “auto tuning” with user definable target lambda
•EGT fuel correction
•Soft and hard cut rev limiter
•Dual map switching for fuel/ignition/boost
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jl222
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« Reply #7 on: December 13, 2012, 12:19:46 PM »
Quote from: hombre on January 03, 2011, 04:47:05 PM
I thought some of you might like first peek at the flow chart for the new Rotrex C38-91 supercharger. It's not yet published on their website.   cool



I can post the PDF for a larger view... but can't figure out how to attach it to my post!  huh

  Hard to see chart, but looks like 75% efficiency at 2.0 pressure ratio [aprox 15 lb boost] but what's the
CFM ? Looks small for a large engine.

            JL222
« Last Edit: December 13, 2012, 12:23:08 PM by jl222 » Logged
hombre
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« Reply #8 on: December 13, 2012, 12:54:50 PM »
Rotrex gives air flow in units of mass, not CFM (which varies with temp). The C38-91/92 max output is .63 kg/second, max pressure ratio 2.94.

Link to data sheet: http://rotrex.com/Home/Technology/Product_Technical_Data.aspx with temp conversion for CFM.
« Last Edit: December 13, 2012, 12:56:23 PM by hombre » Logged
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