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Old 04-08-2006, 05:26 PM   #1
Scooby Specialist
Member#: 92114
Join Date: Jul 2005
Chapter/Region: NESIC
Location: Westerly, RI
03 WRX (NAVY Camo)
in"Special Ed." Run Group

Impreza WRX How bad is NOS for the stock "03" Pistions & Rods

I have an 03 WRX with cat-free exhaust, VF-34, pinks / fuel pump upgrade, adjustable fuel pressure regulator, larger intercooler, CRY-02 spray system, ECUTek reflash, heavy duty clutch & lightweight flywheel, EGT, Oil pressure gauges, etc, etc..
The engine internals however, are essentially "STOCK". The car has never had any indicaion of running lean or detonating, however I've heard the stock piston's & rod's are a weak part of this breed.
I'm contemplating getting a NOS system hooked up. However I am in no hurry to blow up the damn thing. If properly installed, is this just an explosion waiting to happen or can the stock engine parts handle it???? Are the 03's strong enough to haldle it in the long haul or do I expect to be rebuilding the top end in 10k miles.?
Sorry for the NOOBEE question but I'm just contemplating cost vs performance here and could really use some sound input.
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Old 04-08-2006, 08:51 PM   #2
Scooby Specialist
Member#: 47145
Join Date: Nov 2003
Chapter/Region: MWSOC
Location: Henderson, KY
2012 Gas Saver


properly tuned/setup you'll be fine...
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Old 04-09-2006, 04:56 PM   #3
Scooby Specialist
Member#: 75129
Join Date: Nov 2004
Chapter/Region: MWSOC
Location: Marquette,mi area
09 WRX stg 2+
Lost the boxer rumble


If your talking about a 50 shot then that should be fine but You better make sure your fuel injectors support, Why not alky injection it's not hard on internals like nos would be .
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Old 04-10-2006, 02:13 PM   #4
Sharky NRK
Scooby Specialist
Member#: 29549
Join Date: Nov 2002
Chapter/Region: TXIC
Location: Hutto, TX
2003 WRX


205 pistons are cast and will not take nitrous assited knock, so be safe and careful, have adequate fuel and tune, then a reasonable shot will be fine
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