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Registered
Join Date: Oct 2006
Location: Colorado, USA
Posts: 8,279
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How much power is lost through a 915 transaxle? (for dyno run)
Does anyone have an accurate number? Trying to convert chassis dyno rear wheel hp into crank hp.
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11-14-2007, 02:44 PM
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Monkey Butt Forespin
Join Date: Jul 2007
Location: Cumberland, RI
Posts: 474
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I have always guesstimated 15% losses on a manual gearbox, 17% for a FWD w/ Quaife, and 22-25% for automatics as a rule of thumb.
I would also be thrilled to know a definitive number for losses with the 915 if anyone's done engine dyno then chassis dyno...
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Fred Hurder Jr For Tech Questions: '84 911 Carrera Cabriolet (US) Weltmeister Chip, Fabspeed Euro Pre-Muffler, M&K 1-in / 1-out Muffler 22 ERP /29 Sander Hollow T-Bars, Bilstein HD Struts / Sport Shocks ERP Poly-Bronze Bearings (A-Arms & Spring Plates), Stock Swaybars Turbo Tie Rods, '92 C2 5-Spoke wheels w/ 1" adapters, Drilled Zimmermans Yes, I drive mine as much as possible. If it's >32° & sunny, I've got the top down. 
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11-14-2007, 02:47 PM
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Registered
Join Date: Aug 2004
Location: San Antonio, TX
Posts: 1,814
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I thought once an automatic locked up, it did not lose much more than a manual?
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Paul 1980 911SC Targa - Sold 1972 914 - Sold |
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11-14-2007, 02:50 PM
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THE IRONMAN
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From 911 chips website...
http://www.911chips.com/dyno.html
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1984 911 CARRERA RUBY RED TARGA SW CHIPPED-BURSCH CATBYPASS MONTY FREE FLOW EXHAUST <IN GAS WE TRUST> |
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11-14-2007, 04:34 PM
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Registered
Join Date: Oct 2006
Location: Colorado, USA
Posts: 8,279
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Thanks. 15% seems about right from what I've seen.
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11-14-2007, 07:17 PM
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Registered
Join Date: Oct 2007
Posts: 595
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Quote:
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11-15-2007, 06:08 AM
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Porsche 914
Porsche 911 Carrera
THE ROADSTER
