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Old 08-05-2013, 12:22 PM   #1
Scooby Specialist
Member#: 194062
Join Date: Nov 2008
Chapter/Region: MAIC
Location: Camp Hill PA
2003 Impreza WRX

Default Any way to adjust this?

So I had the car driving before on a kstech megamaf I scaled without really knowing injector size. Modded injectors I put 780 and adjusted the rest till it ran

Now I changed to real 1000cc's and am rescaling everything since I was clearly off on the injector size.

Also added cams. My big problem now is no matter what I do to the scaling it drops very lean coming to idle. Even if its scaled so rich that it idles rich. Any ideas why? No mechanical issues. 50/50 aps bpv/bov set stuff enough its fully recirc except high boost. I wouldn't mind the lean dip under no load but with the cams, lightweight flywheel and lightweight crank pulley it has a tendency of wanting to stall unless you feather the throttle a bit just above idle then it will catch and idle fine. Just cleaned the iacv hoping that would fix it and it helped some but still does it.
Any way to adjust it so when your cruising the push in the clutch to stop for a red light rpm drops and starts to catch it at 1000 then slowly comes down to 900 rather then dropping straight to 900 rpm base idle? I understand its not the ideal setup huge maf big injectors big cams and a 16 bit ecu with all the values halved to workaround the 300gs limit but I was hoping for something. For example the Evo/dsm guys have a base idle air bleed screw so they just crank that up so the base idle is higher and the computer runs most of the time with the iacv almost closed. That way on sharp throttle drop it has a lot more room to give it air with the iacv to catch it

I was thinking about bumping up the throttle stop screw for a similar defect but I wasn't sure how well that would work. Obviously I'd need to adj adjust the tps so closed throttle read correctly
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