Sheefa Posted January 20, 2007 Share Posted January 20, 2007 Found this in book of receipts, but before the new hybrids were fitted. The car had a SH engine fitted in late 2005 with only a certified 37,000km covered so she's going pretty strong. Just wondered if there are any 'strange' figures in the readings and if they can be 'relied' upon? Cheers Greg Quote Link to comment Share on other sites More sharing options...
SUPRALOOPY Posted January 20, 2007 Share Posted January 20, 2007 auto? if so knock 40 hp off and then 25% thats what they told me when i had mine done there Quote Link to comment Share on other sites More sharing options...
Sheefa Posted January 20, 2007 Author Share Posted January 20, 2007 LOL really? I'd of thought my car would be running more than 300bhp! Quote Link to comment Share on other sites More sharing options...
Jake Posted January 20, 2007 Share Posted January 20, 2007 285rwhp = 421.5 flywheel ? That's 32% drivetrain losses! Quote Link to comment Share on other sites More sharing options...
Sheefa Posted January 20, 2007 Author Share Posted January 20, 2007 Jake, what does that mean mate???! Quote Link to comment Share on other sites More sharing options...
Jake Posted January 20, 2007 Share Posted January 20, 2007 The power at the engine is higher than the power at the wheels because some power is lost in the drivetrain. (gearbox, diff, wheels, etc). The rolling road can only measure the power (well the torque really) at the wheels. So the flywheel power is pretty much guessed at by allowing a certain percentage loss. Usually folks allow 15-18% for manuals and 20-22% for autos. Quote Link to comment Share on other sites More sharing options...
Sheefa Posted January 20, 2007 Author Share Posted January 20, 2007 OK mate, but in a word, is there a problem with the car putting the power down, or is the the RR measurement techniques? Thanks. Greg Quote Link to comment Share on other sites More sharing options...
Sheefa Posted January 21, 2007 Author Share Posted January 21, 2007 Bump - anyone else have any comments please? Would like to know more and about any potential blips. Quote Link to comment Share on other sites More sharing options...
Alex Posted January 21, 2007 Share Posted January 21, 2007 I'd say the car is fine and the dyno is over compensating for drivetrain losses. Quote Link to comment Share on other sites More sharing options...
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