how much boost is safe on auto

tcavenger99 · 06-28-2008, 05:07 PM

as stated how much boost is safe on a automatic tranny?

murray1 · 06-28-2008, 06:47 PM

Why are you boosting the tranny?

I am by no means a professional on this subject but since when does boost have any effect on the transmission? Unless you mean by producing more power and therefore increases strain...

Chunk182 · 06-28-2008, 06:59 PM

Quote:

Originally Posted by murray1

Unless you mean by producing more power and therefore increases strain...

Im pretty sure thats what he wants to know.

murray1 · 06-28-2008, 07:56 PM

Quote:

Originally Posted by Chunk182

Im pretty sure thats what he wants to know.

Then he should probably ask how much power... boost isn't directly related to power.

Even power isn't directly related to transmission behavior. It will all depend on how it is driven, if he is launching etc.

There may be a max power number for the torque converter(not sure about this though).

Other then that drive it nice and it should last, push it hard and it might break.

TalonESIT · 06-28-2008, 11:33 PM

Quote:

Originally Posted by murray1

Then he should probably ask how much power... boost isn't directly related to power.

Even power isn't directly related to transmission behavior. It will all depend on how it is driven, if he is launching etc.

There may be a max power number for the torque converter(not sure about this though).

Other then that drive it nice and it should last, push it hard and it might break.

C'mon guys you know what he meant, even if it wasn't stated correctly. Boost provides power and in turn thats what he meant, I wish I could tell you but I honestly don't know... Anyone with a boosted automatic have any idea?

red97tib · 06-28-2008, 11:38 PM

I have seen this issue pop around the forums quiet a bit, but never a straight answer come of it. Everybody always lays out how much boost they want to run and the supporting mods and such then like 5 people pop in and talk about the auto tranny not being able to hold up. I have never seen a solid number but it's above 18 psi, I know that much.

RallyEclipse98 · 06-28-2008, 11:43 PM

I take it your engine is built and now your just wondering what your tranny can take? I would slap a tranny cooler on and worry about your engine setup breaking, not your tranny. If your transmission does give out, beef up the new auto transmission you replace it with or do a 5-spd swap.

tcavenger99 · 06-29-2008, 06:34 AM

yes my engine is fully built. I plan to do a 5 speed swap this winter yet till then i am automatic lol.i am presently running 10 psi and the motor feels great yet the tranny is kind of iffy. just thought i would ask this question because i want to drive my car all summer then swap in winter lol

psycho · 06-29-2008, 08:30 AM

Personally, every auto that I have seen boosted has failed with less than moderate power levels. If you plan on keeping it for a while, I would suggest a decent sized transmission cooler. And don't do burn outs.

91tizzy · 06-29-2008, 11:42 AM

I know the only problem with the auto awd tranny's is the endclutches will go with too many abusive launches...other than that there actually pretty beefy auto's...converter can hold up suprisingly well...Im boosting on a stock auto awd setup with 153,xxx miles....all you can do is drive it and use your best judgement and see what happens....maintenance maintenance maintenance

twack · 06-29-2008, 01:40 PM

I run 28psi daily on a 50trim pte turbo on a stock auto tranny with 120k miles on it. holding up great.

91tizzy · 06-30-2008, 01:28 PM

Quote:

Originally Posted by twack

I run 28psi daily on a 50trim pte turbo on a stock auto tranny with 120k miles on it. holding up great.

haha

this right here is freakin killer to hear

.....tell all the naysayers to shove it

TSIMonsteR · 06-30-2008, 03:44 PM

Quote:

Originally Posted by twack

I run 28psi daily on a 50trim pte turbo on a stock auto tranny with 120k miles on it. holding up great.

The OP is a 420a car... different transmission