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Old 08-20-2003, 03:21 AM   #1
whtlegacy
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Member#: 38400
Join Date: Jun 2003
Chapter/Region: MWSOC
Location: Cleveland
Vehicle:
2004 WRX Wagon
DRZ400SM

Default Should I get an A/F meter?

I have a rallitek intake and MRT full headerback exhaust on my '99 DOHC 2.5. I've heard that intakes can really mess up the A/F ratio on MAF's and I'm really curious to see how my engine is running before I think about getting an S-AFC or ProECM chip to change my A/F ratio. I'm looking at a Split Second ARM 1 Meter - Part# SPOAFCM from rallitek.com. Is this what I'm looking for to determine whether my A/F ratio has been messed up by my mods? Do I need this? I'm just worried that my mods aren't performing as well as they could.
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Last edited by whtlegacy; 08-20-2003 at 02:16 PM.
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Old 08-20-2003, 09:37 PM   #2
ciper
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AWD 946 Rio Red Jpn built

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Borrow a high accuracy volt meter and print out the voltage to A/F ratio chart. No reason to buy it just yet. Wire it up so you can watch it while driving (mount it somewhere, zip ties and double stick tape works great).
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Old 08-20-2003, 10:57 PM   #3
Poppa smurf
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IIRC the rallitek intake was one of the few that actually worked well with the MAF? Do you have a lean spot around 5.5K?
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Old 08-20-2003, 11:45 PM   #4
whtlegacy
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2004 WRX Wagon
DRZ400SM

Default

Yeah I actually heard that too. I'm not sure if I have a lean spot. How can I tell? Would my exhaust radically change the A/F ratio? It would make sense that an intake would change it a lot more I guess.
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