T-56 to TH-400 loss??
Thread Starter
10 Second Club
iTrader: (16)
Joined: Jan 2006
Posts: 1,013
Likes: 1
From: Wichita Falls, TX
T-56 to TH-400 loss?? I'm putting a Rossler built TH-400 with an ATI 8" coverter in here shortly, going from the T-56. The car dynoed at right around 380rwhp/372rwtq through the T-56 and a 12-bolt with 3.90's. How much rwhp can I expect to lose through the new tranny?
I made about 400rwhp with a 4l60 and a 4400 stall and went to a th400 with a 4000 stall and went down to 362rwhp but went from running a 11.60 on motor to a 11.20, it wasnt a t56 but i hope that helps a little 
Thread Starter
10 Second Club
iTrader: (16)
Joined: Jan 2006
Posts: 1,013
Likes: 1
From: Wichita Falls, TX
I knew I was going to lose rwhp, but I am also fully aware that the dyno is for tuning purposes...and thats about it. I'm hoping to drop .5 seconds off my ET going from the T-56 to leaving at 4000 off the T-braked TH400. Then I'm hoping to drop another .5-.7 from a 100 wet shot through an 85mm plate. Am I hoping too much?? Or do you guys think these numbers are feasable?
friend of mine made the swap last year, he was running a M6 on his 383 powered ta... he made 497 thru the M6, did a th400 swap with a 4800 converter, and now makes about 435. Plan on a 70 hp loss +/-
Don't wory about it though, just go run it at the track and go a 1/2 second faster, never have to worry about another clutch, missed shift hurting the motor, etc.etc. Just please tell me you put a scatershield on teh tranny before you put it in... if you didn't please get the 5 lb csr carbon fiber shield and put it on.
Don't wory about it though, just go run it at the track and go a 1/2 second faster, never have to worry about another clutch, missed shift hurting the motor, etc.etc. Just please tell me you put a scatershield on teh tranny before you put it in... if you didn't please get the 5 lb csr carbon fiber shield and put it on.
Trending Topics
Thread Starter
10 Second Club
iTrader: (16)
Joined: Jan 2006
Posts: 1,013
Likes: 1
From: Wichita Falls, TX
Originally Posted by JL ws-6
friend of mine made the swap last year, he was running a M6 on his 383 powered ta... he made 497 thru the M6, did a th400 swap with a 4800 converter, and now makes about 435. Plan on a 70 hp loss +/-
Don't wory about it though, just go run it at the track and go a 1/2 second faster, never have to worry about another clutch, missed shift hurting the motor, etc.etc. Just please tell me you put a scatershield on teh tranny before you put it in... if you didn't please get the 5 lb csr carbon fiber shield and put it on.
Don't wory about it though, just go run it at the track and go a 1/2 second faster, never have to worry about another clutch, missed shift hurting the motor, etc.etc. Just please tell me you put a scatershield on teh tranny before you put it in... if you didn't please get the 5 lb csr carbon fiber shield and put it on.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo The drum can explode... but it's really rare, you have to do somethign dumb like downshift it manually at high speeds.
The shield is just a relaly good idea, they aren't that expensive, will fit without too much work (will rub the floor a little, but not enough so you have to hammer anything) and it's just a good idea.
IMO, if you're putting a th400 in a 4th gen car, you're probably into the 11's and will need it noce you are in the 10's, so why not take care of it now.
The shield is just a relaly good idea, they aren't that expensive, will fit without too much work (will rub the floor a little, but not enough so you have to hammer anything) and it's just a good idea.
IMO, if you're putting a th400 in a 4th gen car, you're probably into the 11's and will need it noce you are in the 10's, so why not take care of it now.
Launching!
Joined: Jan 2004
Posts: 235
Likes: 0
From: Illinois
Originally Posted by 02SS:ZEUS
I knew I was going to lose rwhp, but I am also fully aware that the dyno is for tuning purposes...and thats about it. I'm hoping to drop .5 seconds off my ET going from the T-56 to leaving at 4000 off the T-braked TH400. Then I'm hoping to drop another .5-.7 from a 100 wet shot through an 85mm plate. Am I hoping too much?? Or do you guys think these numbers are feasable?
I agree, .7 is probably the most you'll get with only a 100 shot, but I wouldn't be suprised to see a .8 drop or .9 at the most. Alot depends on how your car reacts to the t-brake. I've seen cars that can't do any better on the brake vs. stalling. I personaly did better off the brake. I am assuming your talking quarter mile.
