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GT40FIED · 09-23-2003, 04:05 PM

*DING DING DING* V8killimports' got it. Generally speaking you can expect a 10%-15% loss through a manual transmission and 20%-25% through an automatic. So 20% is a good average number. It also depends slightly on the efficiency of your transmission. That percentage can also go up and down depending on your power level and parts. Take my last dyno...it read 657hp at the wheels. Using a loss of 20% (657 x 0.2) that means I'm loosing 131.4hp through my transmission and rear end and making 788.4hp at the engine. There's no way this is correct cuz my block would fly apart. But I've got a wide ratio gear set in the transmission and a really good converter so it lessens the loss probably a lot closer to that of a manual tranny. and cuts the actual hp loss in half. Still in danger of ripping my block apart...but not nearly as bad.

09-23-2003, 04:05 PM	#6
GT40FIED Best...mod...ever Join Date: Sep 2001 Location: At the end of the longest line Age: 43 Posts: 7,451	DING DING DING V8killimports' got it. Generally speaking you can expect a 10%-15% loss through a manual transmission and 20%-25% through an automatic. So 20% is a good average number. It also depends slightly on the efficiency of your transmission. That percentage can also go up and down depending on your power level and parts. Take my last dyno...it read 657hp at the wheels. Using a loss of 20% (657 x 0.2) that means I'm loosing 131.4hp through my transmission and rear end and making 788.4hp at the engine. There's no way this is correct cuz my block would fly apart. But I've got a wide ratio gear set in the transmission and a really good converter so it lessens the loss probably a lot closer to that of a manual tranny. and cuts the actual hp loss in half. Still in danger of ripping my block apart...but not nearly as bad. __________________ 1984 1/2 Mustang GT350 #842, Faster than you...nuff said Anna Fan Club President/Dictator Someday, in the event that mankind actually figures out what it is that this world actually revoles around, thousands of people are going to be shocked and perplexed that it was not them. Sometimes this includes me. "If you want a vision of the future, imagine a boot stamping on a human face - forever." - George Orwell Welcome to the new Amerika