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Top 2GNT Technical Performance/Engine Auto Trans- A604 topic #4679
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douglaslovinOct-14-10 01:02 PM
Member since Oct 07th 2010
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#4679, "How much HP can the auto tranny hold?"


          

I got the 99 eclipse RS automatic tranny 420a engine. How much HP can it hold reliably for a DD. I won't be power brake launching or anything stupid. I really just want to put a basic turbo on it at this point just for a little UMPFFF on the highway

  

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dalesmitsuNov-07-10 02:57 PM
Member since May 13th 2006
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#4680, "RE: How much HP can the auto tranny hold?"
In response to Reply # 0
Nov-07-10 02:58 PM by dalesmitsu



          

Originally posted by douglaslovin
I got the 99 eclipse RS automatic tranny 420a engine. How much HP can it hold reliably for a DD. I won't be power brake launching or anything stupid. I really just want to put a basic turbo on it at this point just for a little UMPFFF on the highway


There's wealth of good information, on here Search. Then ask questions second.

__
1995 gs Saved from the crusher
1998 RS gone to(Dsm Heaven)
1997 gs gone to Dsm heaven

  

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jesus420aApr-29-11 11:31 AM
Member since Aug 12th 2009
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#4689, "RE: How much HP can the auto tranny hold?"
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The A604 tranny won't hold as much. If you do boost it, it will hold about 8psi tops. if you go over the clutches will start to slip.

DSM FTW

  

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420agreenvilleSCApr-29-11 02:54 PM
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#4690, "RE: How much HP can the auto tranny hold?"
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Apr-29-11 02:59 PM by 420agreenvilleSC



          

Originally posted by jesus420a
The A604 tranny won't hold as much. If you do boost it, it will hold about 8psi tops. if you go over the clutches will start to slip.


first, use the search function. this has been discussed numerous times throughout the years.

next, that's a strong statement and false. although not recommended daily, they'll hold upwards of around 15psi (giving into accnt the condition of the clutch packs and overall trans). If you don't have a trans cooler, GET ONE. DO NOT boost w/out it. I boosted for years from 6 to 10psi on a worn ATX and never slipped once.there's some people that I've read in the past that have gone as high as 18psi with no slips.

My recomendation?
if you're not built, you'll break the motor before the trans, so boost away.
if you ARE built, don't go over 12psi. also, stay away from long pulls. This will bring up the temps of the ATX fluid to very high levels. Heat is what kills A604's mostly, not power.

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Outside of Corona: "That sucks, peace out..." (jamie walks away)... "Sweeet, what we doin?" -Zac
Tim's garage (prior to motor install): "Im gonna smoke real quick, that way if you fuck up I am already nicotined up" -Tim

  

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