LT1-LT4 Modifications 1993-97 Gen II Small Block V8

auto/manual hp difference

Old 09-10-2006, 09:00 PM
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Default auto/manual hp difference

I was told i would get less wheel hp from modding my auto lt1, than i would if it were manual. True or bull
Old 09-10-2006, 09:01 PM
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autos have a little bit more powertrain loss as opposed to standards. i'm not sure how much differecnce tho, off-hand. someone else will reply with exact numbers, i'm sure.
Old 09-10-2006, 09:08 PM
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i think its like 13-14% loss thru manual and upwards of 18-20% on autos.
Old 09-10-2006, 09:45 PM
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The 4L60E is not as power hungry as the old TH400s and stuff so 18-20% is a good number for them.

You get the same HP increase from mods you just wont see as much at the tires on the dyno, on the track though it takes a great driver to make a M6 out perform a well setup stalled auto.
Old 09-11-2006, 04:23 AM
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a manual with put more hp to the wheels, but an auto will almost always take a manual (if it is stalled right) due to consistancy, and with a manual it does take more skill.
Old 09-11-2006, 06:53 AM
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From Friends of mine cars to my car On 2 didfferent cars I seen a difference of 11hp tq was about 18ft lbs. This was on 2 different LS1 cars but pretty similar for LT1's from some of the dyno results i seen posted


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