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Old 03-23-2006, 10:39 AM   #1
kheff46
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Cool V4 sti weakpoints?

what is the weak link in the v4 sti motor? pistons first? then rods, bearings? something like that?
i wondered what the stock motor will handle internally? 300-350whp~? and built with a great durable tune? any ideas are cool, lets have 'em! -keith
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Old 03-23-2006, 10:46 AM   #2
Matt Monson
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Rod bearings and the center thrust main bearing. After that it depends on if your motor has cast or forged pistons. The v4 is known to have come both way. Regardless, if the engine is fresh, 300-350whp shouldn't be an issue. If it's not fresh, well...
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Old 03-23-2006, 12:59 PM   #3
jamesfacts
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Get an oil cooler.
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Old 03-23-2006, 02:48 PM   #4
kheff46
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hey matt!
who makes good replacement rod and main bearings? 500whp ones!
how do i tell if they are cast or forged pistons w/o tearing apart?
i'd like to realistically look at what my new motor is capable of, now and after a good rebuild. id like 500whp reliably after a rebuild with an ej257 bottom end, and tons of other bits. but thats a ways away. before that id like to daily drive it and look at upgrades that im not tossing away when i rebuild or something (good EM thats versatile). any ideas?

Oil cooler is in the works as we speak. good idea tho! thanks!
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Old 03-23-2006, 02:52 PM   #5
Hurley 2.5 WRS
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Quote:
Originally Posted by Matt Monson
Rod bearings and the center thrust main bearing. After that it depends on if your motor has cast or forged pistons. The v4 is known to have come both way. Regardless, if the engine is fresh, 300-350whp shouldn't be an issue. If it's not fresh, well...
1234freaking5


but what are you wanting to do? id run it till it breaks, but have an exit plan!
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Old 03-23-2006, 07:10 PM   #6
kheff46
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run it till it pops is right! then exit plan A.

PLAN A: depends on what broke and needs replaced. but id like more power (400 whp) reliably on v4 block for daily driving. if it wont handle it with supporting mods, ej257 it'll have to be. i guess thats plan B!

if i gotta go big(ej257), or go home(not drive), i'll go big! easy choice as you an see
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Old 03-25-2006, 11:02 PM   #7
Spilner
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I would just go with the ej257 if you're spending the money anyway not only can it handle the power but it's usdm motor so the replacement parts are easily available as opposed to the jdmv4 motor
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Old 03-26-2006, 10:14 AM   #8
kheff46
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thats where im at. availability is first factor in considering replacement stuff. plus its a hell of a strong block! thanks for all your opinions guys! -keith
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