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16-04-2008, 08:14 PM | #1 | ||
FF.Com.Au Hardcore
Join Date: Apr 2006
Posts: 784
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i was reading through the thread that just got closed,so please no dyno arguments.
but...on the topic of how high should the rpm limit be set /verses peak hp rpm i wouldn't mind knowing . lets just say stav set his limiter @ 6500.can a dyno measure what hp/torque he's pulling in 1st gear @6500rpm? now,if stav changes to 2nd after hitting 6500 in 1st = X rpm in second,can a dyno read how much hp/torque he is now getting in 2nd gear. what i'm getting at is even though a cars peak hp/ torque is dropping off @high rpm ,can a dyno measure wether you better off holding 1st gear longer to keep the cars momentom going rather than changing gears just after the power peaks? i hope this makes sense..
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16-04-2008, 08:38 PM | #2 | ||
Two > One
Join Date: Dec 2004
Location: Adelaide
Posts: 7,063
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Yes.
Undertake a dyno run in 3rd gear. Then interpolate the shift point RPM drops onto the graph. Easy
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1978 LTD - 408ci - 11.5@120.6mph - 2004 S4 - 4.2 - M6 - quattro - |
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16-04-2008, 08:39 PM | #3 | |||
Clevo Mafia Inc.
Join Date: Dec 2004
Location: Melbourne
Posts: 10,496
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Quote:
Agreed, no guess work. The engine makes max power at the same rpm regardless of what gear it's in. Last edited by Falcon Coupe; 16-04-2008 at 08:58 PM. |
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16-04-2008, 09:04 PM | #4 | ||
FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Pit Lane
Posts: 11,867
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Gear ratio changes between gears and where the torque peaks, can also be a consideration,
when changing gears you will want the revs to fall around your torque peak so it will pull harder in the next gear, the torque can also be measured to see what rpm this would occur at, so by over revving engine past the peak horsepower can sometimes make the car quicker because it may make it closer to the peak torque
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17-04-2008, 07:24 AM | #5 | |||
RIP...
Join Date: Dec 2004
Posts: 15,524
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Quote:
Rick.
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