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Old 05-13-2012, 01:28 PM   #1
Scooby Newbie
Member#: 317065
Join Date: Apr 2012
Default CAI, use it or not ?

Hi I'm currently modding my edm bugeye wrx
I'm going o/s and doing it myself , it's very new to me at the moment
I'm starting right at the beginning and doing some logging with learning view
The thing is it had one of those horrible eBay cai pipes on (s shaped ) I was gonna remove it but I've cut it up and modded it so the afm sits on a nice straight section instead of trying to read off air bouncing around off bends ( low / high pressure and all that )
I've started logging with a view to scaling the maf but the results are not what I thought here's one of a few logs for Af
The Af learning is IAM 16
0<5.60. 5.60<10.0. 10.0<50 50.00+
0.68. 0.68. 1.17. -0.10
Now to me these figures don't seem a million miles out maybe the 10<50 could have a tweak
So I'm thinking I could run with this maf scale , it seems closer than some
Also it's pulling a little timing in the odd spot 1.05 in a couple of spots and a 2.11 in one area (Im running on 97 and should run 99 so that could help plus I can sort that I think when I come to mapping it )
Would you guys be happy with these figures as a starting point for maf or can you work to get it to 0
Sorry I can't post the snap shot it won't let me
Like I've said it's all very new to me ( I could be totally wrong )
So any opinions or advice is very welcome
Cheers tony
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Old 05-16-2012, 03:25 PM   #2
Scooby Specialist
Member#: 232458
Join Date: Dec 2009
Chapter/Region: SWIC
Location: Las Cruces/El Paso
2005 & 2008 STi
Cobb 20g & EFR 7670


That's actually very good. Most people say +/- 5% is good. However it would be better for the trims to be all lean or all rich. Seems like the D range is rich but not by much at all. If there are no drive-ability issues (stumbles, hesitations) from the C range to the D range (lean spot to rich spot) then I'd say your scaling is good.
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Old 05-16-2012, 03:47 PM   #3
Scooby Newbie
Member#: 317065
Join Date: Apr 2012

Thanks for the reply , I thought they looked ok but like I say it's very new to me and don't really want to start off wrong from the beginning or im gonna hit trouble later on
I'm gonna keep logging for a while longer and get some more detailed stuff (romraider logger)and gather as much as I can and check I've consistent results , maybe I'm being a little optsmstic trying to get things perfect ,, I think that's gonna take more time and practice
Any advice or handy tips that help out are very welcome,
Cheers tony
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