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07-24-2007, 09:58 AM | #1 |
Scooby Newbie
Member#: 128985
Join Date: Oct 2006
Chapter/Region:
MAIC
Location: Alexandria, VA
Vehicle:2002 bugeye STi-ish MBP |
1 step colder
hey guys im currently running hydra v2.17, i was wondering what would be a benefit of running 1 step colder iridium plugs in my 02 WRX.
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07-24-2007, 10:19 AM | #2 |
Scooby Guru
Member#: 113734
Join Date: Apr 2006
Chapter/Region:
South East
Location: Charleston SC
Vehicle:2023 FL5 Type R Subaruless |
any other mods?
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07-24-2007, 11:27 AM | #3 |
Scooby Newbie
Member#: 128985
Join Date: Oct 2006
Chapter/Region:
MAIC
Location: Alexandria, VA
Vehicle:2002 bugeye STi-ish MBP |
vf22
external WG setup TBE Intake FMIC greddy profec B 550CC Inj. walbro 255 Last edited by Chino1; 07-24-2007 at 01:52 PM. |
07-24-2007, 12:36 PM | #4 |
Scooby Specialist
Member#: 56468
Join Date: Mar 2004
Chapter/Region:
NWIC
Location: Seattle, WA
Vehicle:04 Improved STI Dirty White |
None. The one step colder thing really doesn't apply to a street car. If you are constantly in boost, it could make a difference. If not, you are just going to foul your plugs sooner.
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07-30-2007, 07:33 PM | #5 |
Sammo Hung
Moderator Member#: 10613
Join Date: Sep 2001
Chapter/Region:
South East
Location: N Fla / S Ga
Vehicle:2002 USDM WRX WRB |
have had 1 step colder for the past 5 years.
they have not fouled.. when you run more than stock boost it is a safety precaution. |
08-01-2007, 12:54 PM | #6 |
Former Vendor
Member#: 54918
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:673 WHP Element Tuning Pro Comp Engine |
From my experience one step colder works OK on the EJ20x but not on the EJ257 unless raced. It really doesn't have much to do with the boost pressure but the ability to reach the spark plugs cleaning temperature. For street use going too cold can actually hurt performance since you don't spend much time at high rpm or load therefore it pulls too much heat out of the combustion process. Like I had mentioned though, one step colder works fine for the EJ20x but not so hot on the EJ257 used for street. Colder spark plugs were used in the past as a band-aid to reduce detonation but with proper engine management they aren't really necessary for factory turbocharged cars.
I used OEM heat range plugs in our Time Attack car but now I'm running 10:1 and have bumped up to 1 step colder. Thanks, Phil www.elementtuning.com |
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