|01-23-2003, 12:54 AM||#1|
Join Date: Apr 2001
Location: Chicago, IL, USAVehicle:
2002 fake STi
silver and pink
Dyno tuning the UTEC and/or ems in general
I am bringing my car in for dynoing...4wd dyno. for my stage 3 UTEC setup
How should I start to tune?
I am calling TXS tomorrow but would like to soon you guys out first.
step 1: do a baseline run in 3rd gear to make sure that everything is ok with the engine...check HP, torque, boost, wideband A/F ratios and IDCs....
step2: assuming everything in step 1 is ok. start reducing fuel across fuel map (rpm range) by the smallest increments keeping the values constant across the MAF % readings. when knock is detected at any point in the rpm range start adding back fuel. My question is this way I am basically tuning for WOT and assuming that the fuel settings are safe for part throttle (>60% but <100%)condition. Don't we all drive at WOT?
Or do I do the above fuel reductions and keep an eye on A/F ratios...once it goes above 11, stop and add back fuel at that particular rpm? Better yet, monitor both simutaneously?
step3: start increasing timing across the rpm range evenly by 1 degree. no knock ...proceed by another degree. once knock is detected... note rpm where knock occurred??? Is that possible since I am flooring it?
Is my approach correct? I am assuming the shape of the fuel map and the timing map to be optimal and this may be a wrong assumption. If so How do I tune at specific rpm points? Wouldn't that require an inordinate amount of runs?
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|01-23-2003, 11:07 AM||#2|
Join Date: Dec 2001
Location: Chester Springs, PAVehicle:
2006 EVO MR
I would do the same...
UTEC logs do not provide AFR data enough to tune.. So, I would check and adjust the FUEL map.. (But, you should have a specific boost curve in mine so that AFR will be consistant).
I would not run more than 16 PSI with the STOCK turbo. So, I would create FUEL map for 16 psi and another one for 18 PSI (for drag racing and stuff).
As you said, I would do TIMING next to see if you can advance a little with the help from TMIC...
After you are done! Can you send me a copy of map to my email address? : )
Dan from PA.
|01-24-2003, 11:58 PM||#4|
Join Date: Jun 2002
Chapter/Region: South East
Location: Charlotte, NCVehicle:
2010 Impreza with no
Actually... when you get that mapped tuned stop by my website if you wouldn't mind and upload it. =) We've had quite a few people looking for a stage 3 map. Gluck to you. I'll be tuning my stage 2 + headers map tomorrow down in Atlanta on the dyno.
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