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wondering

This is a discussion on wondering within the General Help forums, part of the LSx Technical Help Section category; how much power loss between a 4L60E and T56????????????...

  1. #1
    Junior Member
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    wondering

    how much power loss between a 4L60E and T56????????????

  2. #2
    Slow SS
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    a lot, i think the estime we used when going from crank to wheels on my jeep after the build was 20% or so, but i may be wrong, it has been a year or so

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    Member jag42420's Avatar
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    Assuming stock vs stock and you're comparing the diffreence, I read a test somewhere in the numerous LS1 forums that showed 20 rwhp manual gain over A4. Everything changes when you change clutches, stalls, tune shift points/pressures, add shift kits, etc.. Rwhp isn't what counts, ETs are what counts. If you're talking about % loss from the crank HP, I'm not sure. Most posts I've seen claim 12-15% loss on the 4th generation generically.

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    Senior Member greatwhiteZ28's Avatar
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    i heard its also a bigger % when added a stall, i ll find out soon for you

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    Member jag42420's Avatar
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    Quote Originally Posted by greatwhiteZ28 View Post
    i heard its also a bigger % when added a stall, i ll find out soon for you
    Stalls drop both ETs and HP on the dyno. That's one of the many reasons that dyno numbers don't mean anything.

  6. #6
    Grand Imperial Wizard Sarge's Avatar
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    Rough rule of thumb is T56 loss is about 10% and the 4L60E is around 15%.

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