Evolution Dynamics Built - Acree's 2.4L/Black - 615hp/589ftlbs
Apr 29, 2011, 11:33 PM
#18
stock maf and ecu been down the track at 9.3 and lower at over 146mph! (by awd motorsports)
Apr 29, 2011, 11:42 PM
#22
-Acree
Apr 29, 2011, 11:48 PM
#23
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I was just using my car as an example that Ive been there with the maf, and his rom had critical cap limits still in place.. if you play with it again now i bet the issues gone. im just trying to help out. and i also have a sweet spot for maf still as well.. so i tend to defend it when its being underestimated. the maf is still a bad ****.. and will support more hp then the community thinks. but of course SD will make more power no doubt about it, which is why i spent the time learning it.
stock maf and ecu been down the track at 9.3 and lower at over 146mph! (by awd motorsports)
stock maf and ecu been down the track at 9.3 and lower at over 146mph! (by awd motorsports)
AWDs cars are all SD tuned on stock ecu. i haven't seen any of their maf cars run a 9, heck i didn't even think they tuned MAF cars at all
Apr 29, 2011, 11:48 PM
#24
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Sorry to thread jack you (
). Back on topic, that much WTQ must be a handful on the streets!
-Jesse
Apr 30, 2011, 12:01 AM
#25
Tip in lean was the only issue the evo 9 really had jitters are apparently not an issue on that rom reasons unknown really. I think I'm very close to solving the issue with the evo 8's although the fixes seem to be car specific.
Now that SD has the 3d mapping all tip in lean issues can easily be solved by curving the VE mix up as kPA rises in the manifold. I've estimated the changes in the rom modeling my curve after what i thought would happen as I do not own an evo anymore i just code for them.. heh.
Apr 30, 2011, 12:02 AM
#26
Thanks bud. I'm really torn between the 1450s or the high z 1680s. Almost double the cost, but not sure if I'll ever need that much. Considering your running @ 33psi with 92% IDC, just not sure if they'll be enough for my 35r at 35+ psi.
Sorry to thread jack you ().
Back on topic, that much WTQ must be a handful on the streets!
-Jesse
Sorry to thread jack you (
). Back on topic, that much WTQ must be a handful on the streets!
-Jesse
And that torque makes the car squirrely for sure. New wheels tires and suspension mods are definitely a requirement.
-Acree
Apr 30, 2011, 12:20 AM
#28
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Acree, I measure injector pulse width and calculate Idc manually. It's 92% out of 100. At 8000rpm two revolutions of the engine take 15ms. If you reach 15ms, the injectors will be static open. The one good thing is, your running very rich at 8000, so that will reduce the duty cycle at that boost level once it is leaned out.
Mr road spike, Can you do anything about the closed loop o2 sensor feedback gain with larger injectors with sd? Every car I've seen with large injectors the closed loop operation has way to much feedback gain. The afr will bounce back and forth over the stoic range, you can feel the cars hesitate when it swings lean. I've found it smoother to just run them in open loop.
Mr road spike, Can you do anything about the closed loop o2 sensor feedback gain with larger injectors with sd? Every car I've seen with large injectors the closed loop operation has way to much feedback gain. The afr will bounce back and forth over the stoic range, you can feel the cars hesitate when it swings lean. I've found it smoother to just run them in open loop.
Apr 30, 2011, 12:23 AM
#29
Mr road spike, Can you do anything about the closed loop o2 sensor feedback gain with larger injectors with sd? Every car I've seen with large injectors the closed loop operation has way to much feedback gain. The afr will bounce back and forth over the stoic range, you can feel the cars hesitate when it swings lean. I've found it smoother to just run them in open loop.
Apr 30, 2011, 12:26 AM
#30
thanks for all your hostility though after i helped your customer.