mark458 Posted May 15, 2009 Share Posted May 15, 2009 My dad ans I are looking to make 800 HP out of a LS1 with the auto tranny. We have been told that theres no way in hell. Does anyone know of a rebuild shop that does performance builds that can make this tranny handle that kind of power? Quote Link to comment Share on other sites More sharing options...
Bigdeezs Posted May 16, 2009 Share Posted May 16, 2009 Usually the max I see touted is 600 flywheel or ~500RWHP...800 sounds like a stretch but maybe on these light weight cars it will hold . My built 4L60E is holding 500whp on my daily 3800# Blazer with drag radials...no problems for the past two years but I havent been squeezing as much as I used to now that I have my Datsun . Quote Link to comment Share on other sites More sharing options...
mark458 Posted May 16, 2009 Author Share Posted May 16, 2009 We found an upgrade kit for the tranny to hold 750hp. Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted May 16, 2009 Share Posted May 16, 2009 IMO the 4l80e would be a better choice. That's alot of HP and TQ, but the z is light also. Quote Link to comment Share on other sites More sharing options...
rytherwr Posted May 16, 2009 Share Posted May 16, 2009 Doc is right...4L80E is better choice, however, TCI is advertising the "6-X" six speed automatic transmission rated as being capable of handling 850 hp (based on the 4L80E). Package includes trans, converter, control unit, paddle shifter, complete wiring harness, trans cooler and dipstick. I haven't seen prices, however, I suspect a wheelbarrow of shekals will be in order. ) http://www.tciauto.com Looked at the web site...price for the package is $6,064.35...a bargain if that is what you need for your hotrod... Wayne Quote Link to comment Share on other sites More sharing options...
Bigdeezs Posted May 16, 2009 Share Posted May 16, 2009 Doc is right...4L80E is better choice, however, TCI is advertising the "6-X" six speed automatic transmission rated as being capable of handling 850 hp (based on the 4L80E). Package includes trans, converter, control unit, paddle shifter, complete wiring harness, trans cooler and dipstick. I haven't seen prices, however, I suspect a wheelbarrow of shekals will be in order. ) www.tciauto.com Looked at the web site...price for the package is $6,064.35...a bargain if that is what you need for your hotrod... Wayne really great info...thanks Wayne! Quote Link to comment Share on other sites More sharing options...
mark458 Posted May 17, 2009 Author Share Posted May 17, 2009 4L80E is too big to fit with out making the tunnel larger... Quote Link to comment Share on other sites More sharing options...
Bigdeezs Posted May 17, 2009 Share Posted May 17, 2009 I'm pretty sure I saw somewhere that the 6l80 is very close dimension wise to the 4l60. Quote Link to comment Share on other sites More sharing options...
rytherwr Posted May 17, 2009 Share Posted May 17, 2009 I had a 4L80E in my 71 240Z...the only thing I had to do was make room near the left bottom of the tunnel for the electronic plug that goes to the controller. pretty easy stuff...I use the JTR setup. Am using a TH 400 at the moment, same size casing and I actually have a full trans shield on it...still have room. Wayne 1 Quote Link to comment Share on other sites More sharing options...
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