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Old 01-11-2010, 02:08 AM   #1
rexblake
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Default AP won't log, power dropping off after 6800rpm

Two issues, heavily modified 02 WRX. Mod list here: http://forums.nasioc.com/forums/show....php?t=1883576

First, every time I go full throttle the AP says it lost connection with ECU. Therefore, I can't log. This is not launching the car, rolling into boost it does the same thing.






Also, the power drops off after 6800rpm. I'm told thats where the stock ecu timing tables end and am curious if the AP allows changing this table. Specifically by elongating the timing to higher rpms. If you can change that, how do you go about it. If you can't change it, can you simply add in massive amounts of timing up top to compensate?

Dyno plot in question:



Clearly boost holds the whole way, even upping boost in the problem area doesn't help.
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Last edited by rexblake; 01-11-2010 at 12:21 PM.
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Old 01-11-2010, 09:13 AM   #2
MRX WRX
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post your setup, why are the tq curves so different on thse pulls? could be alot of things a stock TMIC will do that too, especially on a dyno. bumping up the timing will help alot but without knowing your complete setup i am just guessing.
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Old 01-11-2010, 12:23 PM   #3
rexblake
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ej207 short block:
JE pistons
Eagle Rods
crank drilled
balanced
nitride coated crank

ej205 heads with BC:
Valves +1mm over
Springs
Retainers
272 Cams

Perrin Big maf, APS 525, grimmspeed everything, tial 38mm ewg, invidia dp, borla hush, zeitronix map, samco turbo inlet, DW 1000, walbro 255, APS 50/50 bov, ATI damper, hta68

The first graph is tq curve, the second is PSI.
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Old 01-11-2010, 05:44 PM   #4
Cobb Tuning
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Quote:
Originally Posted by rexblake View Post
Also, the power drops off after 6800rpm. I'm told thats where the stock ecu timing tables end and am curious if the AP allows changing this table. Specifically by elongating the timing to higher rpms. If you can change that, how do you go about it. If you can't change it, can you simply add in massive amounts of timing up top to compensate?
Yes, you can scale the tables to accomodate a higher-revving engine so you can adjust timing at higher-than-stock rev-ranges. It would appear that your timing tables have not been scaled to accomodate these higher rev-limits.

Travis
COBB Tuning
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Old 01-11-2010, 06:08 PM   #5
rexblake
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That's what I needed to know, thank you Travis.

edit: I talked to my tuner and he did rescale the timing/rpm table so that's not issue. Any other ideas?

Last edited by rexblake; 01-11-2010 at 06:17 PM.
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