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Old 03-22-2006, 04:13 PM   #1
snarlingbeast
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Member#: 100356
Join Date: Nov 2005
Location: SoCal
Default Any problems w/ STi bottom end on '02 WRX?

Hey guys,

I just developed a rod knock on my '02 WRX. Only 78k on the clock, too. Very sad. Anyway, I'm basically looking at a short block replacement. I called the parts department of the dealership where my car is just to compare the price with an STi short block, and the STi is - get this - $100 cheaper! The labor is the same, so I'd love to do this swap.

The final motor would have the 2.5 STi bottom end, '02 WRX top end, Injen CAI, Borla header, Borla UP, Helix catted DP, and Borla catback exhaust. I would also have it Ecutek custom-tuned when all is said and done.

Have any of you had any problems / issues with such a bottom-end swap (reliability, driveability, etc.)?

And I know about the unstable A/F ratio issues with CAI's. Will it matter if I get the Ecutek tune?

Thanks!
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Old 03-22-2006, 04:25 PM   #2
ejsportcom
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just use the sti stock head gasket and they will have to tune for a slightly higher compression but it shouldn't make that much of a difference seeing as its mostly stock.....
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Old 03-22-2006, 07:20 PM   #3
snarlingbeast
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bump...
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Old 03-23-2006, 12:30 AM   #4
snarlingbeast
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And... any recommendations on plugs for this config.? Some say one step colder, some say stock.
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Old 03-23-2006, 12:40 AM   #5
MrH00nel2
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Chapter/Region: South East
Location: La Vergne,TN
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2002 Z06
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just get the stock ngk at the dealership, there just fine

make sure you use the plugs for the wrx because thats the heads you are using
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Old 03-23-2006, 01:54 AM   #6
Kostamojen
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Old 03-24-2006, 02:07 PM   #7
Element Tuning
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Normally I would agree and the stock WRX plugs would be fine but since you are bumping compression quite a bit I would recommend a 7 heat range plug instead. This should offer you a little better knock resistance and will be easier to tune for someone who isn't familiar with tuning higher compression.

Thanks,
Phil
www.elementtuning.com
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