LNF drivetrain loss #'s
#1
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LNF drivetrain loss #'s
REALLY I'm looking for modded % losses. DO modded LNF cars have less/more drivetrain loss than a stock LNF? Have not seen it an any threads.....(other than some stock dynos pulling around 230-236 WHP which equalls 9-11% loss)
Most FWD cars in general of roughly our HP/TQ #'s seem to lose 12-18%. AWD cars seem to be consistantly 25-30%. RWD I've seen is somewhere in between. Do these LNF engines or other parts of the drivetrain/tranny somehow reduce drivetrain loss??? 9-11% seems pretty good. I'm curious who's dyno'd modded LNF's and what kind of losses or gains they have seen. I know the answer is useless as the loss will be there no matter what, but I've been learning a lil more about DT loss and just lookin for some more answers. Learn me. :P
Most FWD cars in general of roughly our HP/TQ #'s seem to lose 12-18%. AWD cars seem to be consistantly 25-30%. RWD I've seen is somewhere in between. Do these LNF engines or other parts of the drivetrain/tranny somehow reduce drivetrain loss??? 9-11% seems pretty good. I'm curious who's dyno'd modded LNF's and what kind of losses or gains they have seen. I know the answer is useless as the loss will be there no matter what, but I've been learning a lil more about DT loss and just lookin for some more answers. Learn me. :P
#3
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If you could just get a % loss even on a stock LNF the percentage shouldn't change THAT much from stock to modded. Getting a modded loss % would involve someone modding the motor and pulling it out of the car, then hooking it back up to the chassis and dynoing again. I don't know that you'll find too many people on here with the resources for that.
#4
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14% average. Calculated from baseline dynos pulls using the estimated 260bhp as the denominator.
It's 24.5% on the automatic LNFs like HHR, Solstice, Sky using the same method.
It's 24.5% on the automatic LNFs like HHR, Solstice, Sky using the same method.
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So 14% average on the LNF's huh? Not too bad I guess. Sorry if that seems newB but ya gotta learn somehow. Here's how I got those #'s of 9-11%.
260 stock with most pulls I'VE seen on CSS.net getting 230-236 WHP:
Take 260 X .89 = 231+WHP. That's 11% loss
Take 260 X .91 = 236+WHP. That's 9% loss
As far as getting modded #'s vs stock I figured they would have had stock %'s first then having being modded they could easily calculate the new HP #'s to see the loss % vs stock.
I guess FWD>RWD>AWD in this case. YAY for us.
#9
Thats pertty much what I suspected... % staying the same....but it just SEEMS that more aggressive parts and or higher quality parts.....lighter parts etc would make a difference and maybe significantly in some cases.
So 14% average on the LNF's huh? Not too bad I guess. Sorry if that seems newB but ya gotta learn somehow. Here's how I got those #'s of 9-11%.
260 stock with most pulls I'VE seen on CSS.net getting 230-236 WHP:
Take 260 X .89 = 231+WHP. That's 11% loss
Take 260 X .91 = 236+WHP. That's 9% loss
As far as getting modded #'s vs stock I figured they would have had stock %'s first then having being modded they could easily calculate the new HP #'s to see the loss % vs stock.
I guess FWD>RWD>AWD in this case. YAY for us.
So 14% average on the LNF's huh? Not too bad I guess. Sorry if that seems newB but ya gotta learn somehow. Here's how I got those #'s of 9-11%.
260 stock with most pulls I'VE seen on CSS.net getting 230-236 WHP:
Take 260 X .89 = 231+WHP. That's 11% loss
Take 260 X .91 = 236+WHP. That's 9% loss
As far as getting modded #'s vs stock I figured they would have had stock %'s first then having being modded they could easily calculate the new HP #'s to see the loss % vs stock.
I guess FWD>RWD>AWD in this case. YAY for us.
#15
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It just seems like an absurdly high drivetrain loss
not always and autos w/ higher stall converters can complete w/ manuals
not always and autos w/ higher stall converters can complete w/ manuals
Last edited by krispy; 12-09-2008 at 07:17 PM. Reason: Automerged Doublepost
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SO glad we're manual! Could you imagine buying an auto SS HHR advertised at 260/260 and getting 3/4 of what ur payin for???? Sucker born every minute. LOL
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