2000RATA

I've finally swallowed the jagged pill and decided to go automatic. My setup now works. I've got a clutch that hold, the Tick TR6060 trans, it works awesome. Car runs high 9's at 10-11 psi (data logged) through the exhaust, no 2 step just a 6800 rpm clutch dump. 1.43 60' with a 141.x mph. 4000 lbs car.
So I've decided to put a TH400 in it. At the same boost level what can I expect? Everyone says auto so....

SM105K

iTrader: (3)

When you clutch drop it, does it leave on boost?

2000RATA

Data log showed 5-6 psi at launch.

SM105K

iTrader: (3)

Where you using a 2 step?

There is a few variables. With the correct spec'd converter and trans brake you can leave in the boost and it should pull a similar sixty. Maybe a bit better, maybe a bit worse. Also remember each time you shift it takes 1 to 2 tenths of a sec. It will be more consistent over a manual.

"I out shifted that automatic" - said no one ever.

denmah

iTrader: (2)

in a trans am? why not go 80e and a good converter
then install the stock auto shifter console and setup the computer to shift, lock, and have overdrive

2000RATA

No 2 step. Just drove it like it was N/A. I've got AFCO shocks out back. I should have no trouble repeating the 60' with an auto like you pointed out, if all is right.

SM105K

iTrader: (3)

So in theory it should be faster.

2000RATA

I would but that requires modification to the trans tunnel. The TH400 is a direct swap and I don't have to mess anything up to go back to stick.

Cool28

iTrader: (2)

4l80e trans mod is you just need to make room for the plug. 5 min job at most.

I have a 4l80 in mine and just have to cut or hammer the area that sticks out there

rotary1307cc

iTrader: (5)

Its not gonna mph the same that I'd put the money on.

2000RATA

I wouldn't expect the mph to be the same. Not with a mechanical lock (clutch) vs. a hydraulic lock (converter and no lock up) but how about et? I read guys making the change but they don't seem to post results.

rotary1307cc

iTrader: (5)

Your et looks decent for mph and 60. I doubt it will be a huge difference on the same power unless you really improve the 60ft imo

The manual is working for you. I'd keep it

"MAC"

iTrader: (1)

You'll run faster with the built auto.

2000RATA

That's what I was afraid of is same 60' would yield very similar results. I'm getting talked into an auto. Seems the consensus is the auto is easier on the car.
I had been thinking put a wide open throttle box and a 2 step on then leave on 10 lbs boost. I feel that's all it will hook.
My considering the auto is also coupled with I will switch to an aftermarket computer for engine, boost, 2 step and all the other control they provide. I need more boost control which is why I only have low boost ET numbers. I just got AFCO shocks on the rear and I have only made 2 passes with them. I'm sure I need to work with them more.

DEFYANT

I agree with rotary, it works, keep it. You can imorove on those times, maybe not go 8's like an auto(better chance at least), but it will be more fun. I love that you car is a stick, it gives it a cool factor.

oscs

iTrader: (19)

^^^ This

2000RATA

Thanks guys. I love driving the stick shift. I see a low 9 (9.20's-9.30's) pass with this but not likely an 8. And that's turning the boost up getting a couple other things in order, dropping the exhaust, pull the air cleaners and piping, and so on. The problems are pig heavy car, and 26" tire. The 28" slick rubs my wheel openings front and back. Seems like the right boost control (progressive) with an auto would get the job done.

2000RATA

This is what I'm afraid of. Your a whole .10+ quicker at 60' but your really not much quicker ET (and the quicker 60' time should have shown more in ET)and mph is down. Only up side is your not breaking parts. However it sounds like some rear shock adjustments would have fixed what I read is a 1st to 2nd gear shift wiggle. Gotta be suspension setting for an auto to do that.

93camaro_zzz

iTrader: (13)

These might be unusual results, but check this out:

https://ls1tech.com/forums/forced-in...4l80-swap.html

oscs

iTrader: (19)

I think you should start with what you know can be/needs to be improved first. Swapping from a 6spd to auto isn't exactly an overnight thing.