Quote:
Originally Posted by tomm.brz
Ok the only things i see wrong in the US tune you sent me are
fuel cut resume must be higher than 1.33, put 2
PI to DI% avoid 0% at full load, insert more PI like 20 or 25% at mid rpm high load
Cam timings are kept stock and are inadeguate, try stage2 OTS cam timing and remove 4 Degrees from both intake and exhaust at high load and you are more in the ballpark
Put fuel map lean closed loop the same as you main fuel map (stretch it eventually)
Make afr a bit richer from low rpm to mid rpm
Copy paste exactkly main fuel map into Power AFR maps but it s tricky as it wants under 12. 6 to go into open loop so then modify , over 1.1 of engine load, the cells that are over 12.6 afr and put the like 12.4
Modify Exhaust manifold temp threshold lowering overall of 300 degress, this way you could bypass the power afr maps
Enable ticks on all maps on "Closed loop fuel control options"
i would not use N10C cal with latest racerom, since it seems you re still able to convert calibrations, if you switch to euro rom you could use K00G as it doesn t have any power afr maps and quite free of bugs with 12.1 racerom
Also Q00G and S20G seem ok but they have the power afr maps
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Thanks for the insight and info, appreciate you taking a look. That explains my original issue. I can find almost no info about the power afr table, is there a place I can read up on it or do most tuners ignore it (opting for the K00G map). Also I tried flashing the K00G map, but Ecutek complained that it wasn't compatible - is there something I need to do? I'm currently using the Q00G map and all the suggestions you've had more or less fixed the AFR issue. Currently working through closed loop maf scaling and will take a stab at open loop scaling once I get past this next issue:
Despite my fueling now hitting the afr target, I was still having an issue with audible knocking. Even zeroing the advance table did not help. I thought the ignition table from the ecutek guide would get me in the ballpark, but I think they're way too aggressive for what I can do on 91 octane. I've opted to take the "vvt off" ignition base table from the OFT stage2+ tune and interpolate it out for the load I'm doing. Just doing a quick check, the total timing is 5 - 10 degrees retarded in the cells I was seeing knock. Haven't really tested yet, but some partial pulls have me feeling a bit more comfortable. My current goal is to keep fiddling with it until I can eliminate most serious knocking - after that I'll start adding timing back and finding more appropriate afr targets.
I've probably lowered the life expectancy of my engine, which is not what I wanted, but I'm not sure how else I was going to jump into software tuning. If you know of any other sources I can learn from, it'd be much appreciated.
