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Old 04-29-2001, 09:48 AM   #1
Hondaslayer
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Location: Auburn, WA
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1998 Forester, lifted.

Post Safe horsepower level's with stock tranny (5spd)

What could I do to my scooby without blowing my transmission up? I was considering keeping it N/A but a small turbo could be in the future or a supercharger perhaps.
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Old 04-29-2001, 10:41 AM   #2
Longshot
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210 ft-lbs of torque is a general consensus of what the stock clutch can take, after that getting an ACT clutch will keep the car going for a bit longer, if you're planning on going past 300 ft-lbs.. you may wanna think about a better transmission anyways.

This is all stuff on the RS which you have I dunno what the WRX can handle.

Korey
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Old 04-29-2001, 02:41 PM   #3
Tony
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Clutch holding torque aside, most tranny problems with big horsepower are due to poor shifting techniques by the driver. The tranny can take a lot but even at stock power levels a ham-fisted (or rather footed) driver can blow it up. Do a search on "shifting techniques", there's plenty of info out there on double-clutching, heel-toeing, etc.

Tony
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Old 04-29-2001, 02:50 PM   #4
Jon Bogert
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Post

Great stuff here: www.spdusa.com/shifting.htm
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Old 04-29-2001, 02:52 PM   #5
tom@kartboy
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huh.. i guess i need to learn how to drive then
Quote:
most tranny problems with big horsepower are due to poor shifting techniques by the driver.
tom@kartyboy.com
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Old 04-29-2001, 03:19 PM   #6
Tony
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Maybe, how did your's go? Very few tranny failures I've seen/heard about were from the tranny just "letting go" while in gear. Most failed while shifting into second and are a shock failure rather than a torque failure. I bet if people didn't hurry the 1-2 shift (also the largest % gear change) there wouldn't be 90% of the failures out there.

Tony
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Old 04-29-2001, 03:25 PM   #7
Rivenoak
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Post

Depending on how much time and money you're willing to invest, and how long you intend to keep your car would be the best starting info to answering your question.

You don't sound serious about real power. I suggest two courses of action based on your post.
1.) Minor bolt-ons, tires, and lie alot.
2.) Decide you may need 3x the proposed
budget & 3x the maintenance and go for
real power.
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Old 04-29-2001, 03:33 PM   #8
Tats
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From what I hear, trannies have problems when there is too much torque. You can have 400+hp and honda like torque figures and still be totally safe. But as soon as you seriously up the torque the tranny has problems holding together. And as we all know.....us scooby owners LOVE our torque!

Tats.
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Old 04-29-2001, 03:51 PM   #9
Thug
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Post

RalliSpec even said that almost all turbo'd RS tranny failures were due to shock, not too much HP. So just dont slam 2nd and you should be OK. If you're blowing 3rd gear, you've got more problems than we need to get into.
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Old 04-29-2001, 09:10 PM   #10
Hondaslayer
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So from what you guy's are saying I can keep the stock tranny safe as long as I don't abuse it (rarely do I abuse it) also would wrx like power be O.K ?
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