4L60E Trannies...How Much Horsepower Do They Use?
09-17-2005, 01:28 PM
#1
4L60E Trannies...How Much Horsepower Do They Use? Is there a specification listed somewhere, as to, how much horsepower a 4L60E transmission uses at a given R.P.M.? Or...what exactly is the parisitic loss in power? Is the same specification also available on your typical stock factory 10-bolt differential? Does GM print this anywhere? Thanks, Gar
Gar
09-21-2005, 10:56 AM
#3
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that is a parasitic loss of power from motor through the trans. there is no set "this is how much the trans will take up.' it's based on a percentage rather... on a 400 horse motor you might loose 30 h.p. through the trans, then on an 800 horse motor you'll see a 60h.p. loss through the trans. (just an example NOT factual)
09-21-2005, 04:02 PM
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We messured HP loss in deacceleration when we dynoed oure previous setup and acourding to the dyno we lost 105hp true the a4 and strange 12bolt, 590rwhp at 5500rpm the dyno calculated the engine hp to 695hp at 5500rpm....
cant help you widh the loss from the 4l60e only, sorry
cant help you widh the loss from the 4l60e only, sorry
09-21-2005, 06:03 PM
#5
Lisa33... [QUOTE=lisa33]We messured HP loss in deacceleration when we dynoed oure previous setup and acourding to the dyno we lost 105hp true the a4 and strange 12bolt, 590rwhp at 5500rpm the dyno calculated the engine hp to 695hp at 5500rpm....
cant help you widh the loss from the 4l60e only, sorry[/QUOT Now were getting somewhere! I am thinking also, that, as the gross crankshaft horsepower goes up, the percentage lost would increase slightly also. In other words, it would not be a straight, across the board, percentage loss. Is your 105 H.P. loss through a stock, or modified 4L60E? How to reduce some of this parisitic H.P. loss would be the next logical question. Thanks for the input. Gar
cant help you widh the loss from the 4l60e only, sorry[/QUOT Now were getting somewhere! I am thinking also, that, as the gross crankshaft horsepower goes up, the percentage lost would increase slightly also. In other words, it would not be a straight, across the board, percentage loss. Is your 105 H.P. loss through a stock, or modified 4L60E? How to reduce some of this parisitic H.P. loss would be the next logical question. Thanks for the input. Gar
09-21-2005, 07:39 PM
#6
I remember a few years ago a guy swapped from an M6 to an A4. he dynoed before and after. The A4 (converter locked) used about 4% power than the M6. If you come across the power loss for an M6, now you have a conversion factor.
Unlocking the converter will eat another 3 - 8% depending upon the stall's design, with 4 - 6% being typical. These factors come from back to back locked and unlocked dynos of LS1 f-bodies typically making between 330 - 400 rwhp. The amount of loss was unrelated to stall speed. A number of high stall converters tested, including a 4000 stall, were more efficent (i.e. less HP loss at 6000 rpm) than the stock converter.
Unlocking the converter will eat another 3 - 8% depending upon the stall's design, with 4 - 6% being typical. These factors come from back to back locked and unlocked dynos of LS1 f-bodies typically making between 330 - 400 rwhp. The amount of loss was unrelated to stall speed. A number of high stall converters tested, including a 4000 stall, were more efficent (i.e. less HP loss at 6000 rpm) than the stock converter.
