View Full Version : M6 to TH400 yes/no? help me out


98mysticZ
06-14-2011, 08:18 PM
just debating on if i should do it or not... car will be a 408 ls3 headed nitrous car as soon as i get the motor back together... probably weighing 3200-3300 lbs.. and like a 4500 converter... going through a 9in...... right now with the m6 its a mutha to launch.. and i am tired of it not running a number.. SO.... should i trade for a th400?

studderin
06-14-2011, 08:23 PM
autos are :wrist:

98mysticZ
06-14-2011, 08:27 PM
autos are :wrist:

i hear ya... i dont think there gay.. but i think its more of a driver thing if u can row the gears... once i am MOVING i am great at rowing.. BUT i cant get this thing to launch worth a shit... probably cause i am being a pussy lol....

DTB_LS1
06-14-2011, 08:51 PM
I've debated the same thing. What's your car run now? Have you thought about running a "slipper style" clutch. I know it might not be the greatest to drive on the street but it can be done.

98mysticZ
06-14-2011, 09:00 PM
I've debated the same thing. What's your car run now? Have you thought about running a "slipper style" clutch. I know it might not be the greatest to drive on the street but it can be done.

2.2x short times ran 11.24@128 7 times in a row :( and that was on a 335/35/17 hoosier drag radial.... i know not on a slick i have them now but had a lifter get trashed.. so its all out and on the ground... so why not

SmokedOutZ28
06-14-2011, 09:07 PM
I've debated the same thing and actually was going to pull the trigger on a Th400 a month ago. How often will you be at the track vs on the street? If your going to build it to run at the track then go with the auto if you still plan on toying on the street keep the T56 you will miss the gear rowing.

Getting down the launch and 60' on a M6 is going to be a PITA but it keeps it interesting at the track. Unless your shifting slow as hell seat time will help you get better on any setup.

Sounds like you need a slick and some suspension tuning. Shit my 60' foots arent that back and there lousy for what i'm trying to accomplish.

dschmittie1
06-14-2011, 09:11 PM
I made the switch from M6 to auto about 2 years ago. Went from running 10.3@138 with a 1.5 short time to a 9.8@142 first pass out(had a few minor engine/boost changes also)

The kicker to me was a $1000 clutch lasting 8000 miles. I really didn't want to be buying a clutch every year. That and I came across an amazing deal on a Rossler th400 with Tbrake.

I will admit the m6 was more fun on the street. But the RMVB and T brake are lots of run at the track. Not to mention how much faster it is.

I would love to have another m6 car to track drive just not one I am trying to run low 9s in. low 11 to mid 10 second m6 car would be fun

98mysticZ
06-14-2011, 09:38 PM
i drive it to car show's ect... but i dont have to drive it to the track i can get a friends trailer BUT idk... i love rowing gears but i want it to run low 10's n/a and 9.XX on bottle...

SuperSlow02
06-14-2011, 10:14 PM
It's this simple. If your trying to be competetive, switch. If the car is just to get a number then I wouldn't do it, the rmvb is fun but isn't the same. As someone else mentioned....the damn cost of a t56 for drag racing is just too much for me

StreetSilverado
06-15-2011, 05:25 PM
Switch.

I made very similar power as you with my 370ci and went 10.70s on motor and 9.90's on a 150 hit with my TH400. My converter was too loose for spray and the 4.33's didn't like the 1/4 though.

I don't think you'd regret it.

BADD SS
06-15-2011, 07:32 PM
autos are :wrist:

Agreed! But I think we are the minority here....

Honestly with that power, you will break ALOT of stuff if you try to launch hard with a 6 speed. And youre going to spend alot of time trying to get it dialed in.

Auto's are pretty easy to go fast. If you want a challenge, keep it a 6 sp.

ls1curt
06-15-2011, 07:44 PM
go auto. i switched and am very happy i did. dead consistent and less breakage.

03 BUSA
06-15-2011, 07:47 PM
Look into faceplating the trans?? I agree with everyone else though. Any street use I would keep the M6. Track only car go auto.

tording99Z28
06-15-2011, 07:54 PM
If you want to go fast go with an auto. If you want to continue to not be a "pussy" and row gears but go slower doing it then keep the manual. Autos will turn better ET's than a manual everytime.

MUSTANGBRKR02
06-15-2011, 08:11 PM
Go to a 80e if you drive it on the street.

nicentech
06-15-2011, 08:23 PM
So what about Lencos or brunos? Any ls guys running them? You get the manual shift, clutch, and less power loss... Just an idea

mike c.
06-16-2011, 04:37 PM
You can't run a number cuz you suck at driving i'm gussing? Get the auto and leave the manuals to the men..lol Fact is,i have raced many stalled autos at the track and 60 foot as good or better them all i have raced. My 60's is only a low 1.4 but thats good for a 3,700lbs car,i hope to hit 1.3 this year n/a. I don't break shit at all anymore and run close to mid 10's..I don't want to give up the
street driving and lose a mess of gas mi for a few tenths.

HSESWS6
06-16-2011, 05:00 PM
I like my manual and I think I am fairly competitive with it. I may faceplate it eventually to help shift quicker

studderin
06-16-2011, 09:33 PM
If you want to go fast go with an auto. If you want to continue to not be a "pussy" and row gears but go slower doing it then keep the manual. Autos will turn better ET's than a manual everytime.

haha
some guys are doing it wrong then.:gtfo:

99TransAmLS16Spd
06-16-2011, 10:28 PM
Auto will be more fun at the track, the M6 is more fun on the street. I still have the M6, and have thought about an auto MANY times. But I am not a good driver...waiting an hour or whatever to make a run and miss a shift or fuzz up the launch sucks...worse is the accidental downshift and hearing the motor rev to 5 digit rpms for that split second.

With that said, you have to make the decision. I street drive mine too much, so a three speed no lock up was def out of the question. At that point, the initial investment to an auto w/ OD is big money (for a worth while trans). So the happy medium has been the 28"bias plys and an MSD launch controller. Still not the et I would have with an auto, but way better 60's than on a 26" radial

DTB_LS1
06-17-2011, 12:24 PM
i drive it to car show's ect... but i dont have to drive it to the track i can get a friends trailer BUT idk... i love rowing gears but i want it to run low 10's n/a and 9.XX on bottle...

Mystic are you from Plano, IL? If so do you go Byron? I had a lot of help from Rob (98blueSScamaro) and Chris (Chrs1313) last year and we got my m6 cam only car into the 10s consistently so it can be done. Hit those guys up, Rob especially has some great info on running good numbers with an m6.

Mattsv8
06-17-2011, 12:38 PM
just built a th400 for my friends turbo camaro kept breaking the input on the t56 and some other issues with them over its life so far he loves the th400 but dosent like the 3000 rpm cruise speed on the freeway. lol cant win them all. gas mileage deff suffers. but like my turbo truck the th400 can hold what ever and usually for a lot longer than evan a built t56. there is some cost though. im building a turbo kit for my 2001 tha keeps ac and is a driver with a 70mm and im fully plannin on launching the car under boost so im shure my m6 will test me. but im willing to try will have a ball bearing 76 in the final setup want 750 whp. wich will be about 200 less than the s10

98mysticZ
06-17-2011, 09:38 PM
Mystic are you from Plano, IL? If so do you go Byron? I had a lot of help from Rob (98blueSScamaro) and Chris (Chrs1313) last year and we got my m6 cam only car into the 10s consistently so it can be done. Hit those guys up, Rob especially has some great info on running good numbers with an m6.

no sir i am down here in good ole texas.... thanks yall i belive if i can find a full swap i am in... if not i will probably build one and then sell the t56 stuff

Lightning john
06-20-2011, 04:36 PM
I have a 510 rwhp s/c ls1 with a m6 just got the car what should I launch it at on a set of mt 26.10 .15 slicks ????

JRracing
06-20-2011, 10:58 PM
Th400 for a track car. M6 for a street car. Two different worlds as far as driving on street. But no M6 is going to be able to cut killer 60's and work the same every time. Or be consistent like a th400 can be.

I had both and enjoy both for there intent.