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Old 06-17-2003, 11:25 PM   #1
waitandbleed92
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Default What are the ways to tell if you are running lean??

I don't have an EGT gauge so is there anyother way to tell? I have the cobb stg 2 plus upipe and perrin intake, I recently received a new restrictor from them and I spike to .11 mpa and it the settles to about .105 or so mpa, I think I have PTFB in 3 - 5 but I am not for sure how can I test this to see if I really am? I really love the extra power the restrictor gave me but I guess if worse comes to worse I will have to go back to just getting 14lbs of boost instead of the 15.5 lbs to have reliability back but I hope I don't have to. Any Suggestions?? I really Don't think I could be running to lean but you never know?
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Last edited by waitandbleed92; 06-17-2003 at 11:43 PM.
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Old 06-18-2003, 10:32 PM   #2
waitandbleed92
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ttt anyone have any way to indicate if you are lean?
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Old 06-19-2003, 01:03 AM   #3
MrSwede
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I know that this is not what you want to hear, but if you are afraid that you are running lean a $200 EGT probe is a lot cheaper than an engine.
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Old 06-19-2003, 01:13 AM   #4
PaulRex
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Quote:
Originally posted by MrSwede
I know that this is not what you want to hear, but if you are afraid that you are running lean a $200 EGT probe is a lot cheaper than an engine.
Right on, I just bought a UTEC with the intentions of learning how to use it, and it's not even installed yet but I am buying/installing an EGT gauge this Monday.
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Old 06-19-2003, 01:33 AM   #5
JayGold
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Pull your spark plugs and see if they show any signs of white colors. Your plugs when normal should be a color of reddish brown.
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Old 06-19-2003, 01:35 AM   #6
thng
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Well, what about those lean-rich diode displays? I think they're similarly priced and use the O2 sensor to read the stream instead of secondary information.
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Old 06-19-2003, 01:56 AM   #7
Gruppe-S
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For the A/f meters that rely on your factory 02 sensor (such as autometer), in our opinion those meters are fairly inaccurate for use with the WRX. Those meters just give a ballpark reading due to the limitations of the sensor, and for force-fed cars it probably won't give you an accurate enough reading to be useful (short of pig rich or completely lean!).

Your best bet is to really have your car tuned (or at least dynoed!) or to get either an EGT or a wideband 02 meter.

Pulling your spark plugs will also probably not give accurate enough indicitations, and is definately time consuming.

If you want to maintain the power level your best bet would probably just to run a higher octane fuel since in all likelihood those particular mods probably did not significantly lean out the car...

Gary
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