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Old 02-19-2010, 01:40 PM   #1
myk
Scooby Newbie
 
Member#: 223143
Join Date: Sep 2009
Chapter/Region: MWSOC
Vehicle:
2001 2.5rs Sedan
Brack

Default Accessport V2, MAF scaling questions

I have a 04 wrx, It will be running a catless uppipe/dp (3") and 3" exhaust. I was wondering since I have been on the hunt for stock airbox and it has been ELUSIVE AS HELL, if I would be safe to just run a 2.75in short ram intake or roughly 70mm. My understanding is it will lean out the A/F mixture slightly because the stock intake and SPT/Cobb short rams are roughly 65mm or slightly larger. Ive been reading about MAF scaling to compensate for the larger intake but have been trouble finding definitive answers.

I know what the OTS map notes say... its a 5mm if that difference from a cobb short ram/SPT short ram I dont think I will have any serious issues since I will go to the stock intake shortly (SELL ME ONE IN THE MILWAUKEE AREA!!!) though I still would like to know if I can do any slight tweak to compensate. Ideally I would be using a wideband o2 which I can get, but I would prefer not to go through the hassle since its mounted on a buddies car already.

Oh yeah it will be the 93 octane OTS stage 2 map that I will be attempting to run.
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Old 02-20-2010, 04:01 PM   #2
Ysidro
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Join Date: Dec 2008
Chapter/Region: NESIC
Location: New England
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07 WRX Ltd
The Mighty Evo;Fun CRZ

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Originally Posted by myk View Post
I have a 04 wrx, It will be running a catless uppipe/dp (3") and 3" exhaust. I was wondering since I have been on the hunt for stock airbox and it has been ELUSIVE AS HELL, if I would be safe to just run a 2.75in short ram intake or roughly 70mm. My understanding is it will lean out the A/F mixture slightly because the stock intake and SPT/Cobb short rams are roughly 65mm or slightly larger. Ive been reading about MAF scaling to compensate for the larger intake but have been trouble finding definitive answers.

I know what the OTS map notes say... its a 5mm if that difference from a cobb short ram/SPT short ram I dont think I will have any serious issues since I will go to the stock intake shortly (SELL ME ONE IN THE MILWAUKEE AREA!!!) though I still would like to know if I can do any slight tweak to compensate. Ideally I would be using a wideband o2 which I can get, but I would prefer not to go through the hassle since its mounted on a buddies car already.

Oh yeah it will be the 93 octane OTS stage 2 map that I will be attempting to run.
here you go.
http://cgi.ebay.com/ebaymotors/02-03...Q5fAccessories
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