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Old 04-27-2009, 06:47 AM   #1
Sammo Hung
Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: S Ga / N Fla

OMGHi2U aps 70 mm & DW 850..

so a friend of mine has the aps 70 mm intake along with dw 850 inectors.
tried to get maf scaling dialed in but had a few issues.

dw 850's are modded stockers so injector latency is the same.
but flow is bumped up from ~500 to 850cc.

so now with larger injectors & intake maf scaling is the issue.
tried injector flow rates from 680cc to 850cc to
get the afr's at idle close to 14.7, so i could then "adjust"
maf table..

anyone encounter same issues?

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Old 04-27-2009, 08:33 AM   #2
Scooby Specialist
Member#: 85905
Join Date: Apr 2005
Chapter/Region: Tri-State
Location: Staten Island
2004 WRX


Latency should be adjusted to bring the idle fuel trims in line.

The best option would be to revert back to the stock air box and tune the injectors than swap out for the APS intake.
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Old 04-27-2009, 08:15 PM   #3
Scooby Guru
Member#: 36033
Join Date: Apr 2003
Chapter/Region: SCIC
Location: Tuning Lab
CEO PhatBottiTuning
2006 STi GTX3582 + Meth


I can send you my 70mm scale to try.

I am running the 70mm and DW740's.

just give me your email.
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