ej20 piston and rod limitations

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Mar 2, 2006 | 09:40 PM

rexman6

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Joined: Feb 2006

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From: Canada

Car Info: 02 White WRX

ej20 piston and rod limitations

Hi yal, wondering if anyone could tell me what the HP (crank or wheel) limitations are on OEM pistons and rods on a ej20 before they start breaking? Is it possible to run 350 whp on them?

Mar 3, 2006 | 01:58 PM

sigma pi

9 to 5 mod

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From: Chavez Ravine

Car Info: 03 Impreza WRX

i remember reading 300 is "safe" 350 is on the border

Last edited by sigma pi; Mar 3, 2006 at 02:01 PM.

Mar 7, 2006 | 01:28 PM

SubieStylez

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Joined: Dec 2004

Posts: 287

From: Saugus, MA

Car Info: 2001 WRB 2.5RS, Gold Prodrive P1's, Stromung Dual Tip, AEM SRI, Pink "i" fornt badge

what about a VF34 with the Cobb Accessport puts out 320hp, is that still pushing it or its alright but don't go any higher, becuase that's what I wanted was a daily driver VF34 but didn't want to have to upgrade the internals.

Mar 9, 2006 | 08:21 AM

ride5000

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From: 12.9 / 105+

Car Info: black my03 5mt wrx s/w

300whp is when the pistons will be mincemeat if the tune isn't spot on. if the tune is flawless (ie, NEVER knocks) then the rods will be the next point of failure. 400whp is when the rods get tossed out the block.

add about 100hp to the whp numbers for crank hp.