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Old 12-06-18, 06:46 PM   #1
C4viper
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Default Max hp for build

Hey guys im planning a project and was wondering how much hp could reliably be hooked up to the sti tranny and drive train i know ill have to get stronger cvs and build my tranny but was seeing if 800 -900whp would be fine on it
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Old 12-06-18, 07:34 PM   #2
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Fine? What does that mean? What will you do with it? But “fine”? No. There is no 300hp production car that will be fine with three times that. You've already written as much! It might survive for a bit, even longer than it has any right too. But fine? Sure if your willing to fix whatever you break.

How much do you plan to spend?
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Old 12-06-18, 09:56 PM   #3
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Default Re: Max hp for build

Quote:
Originally Posted by C4viper View Post
Hey guys im planning a project and was wondering how much hp could reliably be hooked up to the sti tranny and drive train i know ill have to get stronger cvs and build my tranny but was seeing if 800 -900whp would be fine on it
Define, "reliably" and we'll be able to give you a better answer. What are you going to do with it?
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Old 12-07-18, 08:14 AM   #4
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Default Re: Max hp for build

How about torque and usage? Horsepower has no power here.
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Old 12-11-18, 03:37 AM   #5
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Default Re: Max hp for build

I mean if your building a car for 800-900hp why wouldnt you upgrade the trans.
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Old 12-11-18, 04:11 AM   #6
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Default Re: Max hp for build

you might also twist the drive shaft into two pieces on a good launch.
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Old 12-11-18, 07:32 AM   #7
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Default Re: Max hp for build

have you ever been in an AWD car with over 400 whp?

are you planning on tracking or taking to the drag strip?

I'm not trying to troll you but 800-900 whp/wtq in a Subaru is going to cost a lot and not be very street able. the STi 6 speed is known to be super strong, and anecdotally is "good" to about 800 whp/wtq in stock form. but at that power level you are going to be breaking a lot of stuff consistently.

what is your expectation?
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Old 12-11-18, 10:41 AM   #8
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Default Re: Max hp for build

Yep, it will be fine. Very reliable. You'l get many miles out of it. They've built many 1000HP STIs in the past. They're very reliable. Some have even been around for a couple years now. No sweat, gitter done.
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Old 12-11-18, 12:20 PM   #9
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Default Re: Max hp for build

That really depends on how you use it. CJ has broken he transmission a few times.
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Old 12-30-18, 07:25 PM   #10
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Default Re: Max hp for build

do you even realize how much its going to cost you to build 800hp sti? you can buy another sti, at that power level your car will never be reliable, no matter how good are the parts and how much money youre gonna dump into it, something will always keep on breakin, and repairs going to be costly too, i personally recommend buy a different build platform, i always liked boosted corvettes.
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