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Lets Talk about EFI tuning...

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Old 11-11-2006, 04:04 AM
  #21  
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thanks for the info I will definetly check that out. I'm finishing up my single setup and plan on takng a it to a 20b maybe in a year or two so yea the tuning should be done by a professional but I wanted to do slight changes and maybe work my way up to a reputable level sometime in the future.
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Old 11-13-2006, 11:27 AM
  #22  
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Originally Posted by Sivart_R1' post='844686' date='Nov 9 2006, 12:44 PM

Not to derail the class based derailment...



Question for everyone with the Power FC and just the keypad. I'll probably be picking up the datalogger soonish, but for now looking for a little advice to try to pass emissions.



The car will almost pass on the default maps dumped in by SR Motorsports when I bought the computer. Unfortunately I'm running 2-3 PPM too high on the hydrocarbons. Yes. 2-3 PPM. Legal limit around here is 150 PPM, and the closest non-passing test was 151 PPM.



Washington emissions put the car on a roller, and you have to accelerate and hold at a certain speed - been a while since I did the test, want to say it's 25 mph. I know it was right near 3k on the tach, close enough that I began to wonder if closed loop or open loop would be better - I could probably go just over 3k if needed, or stay under 3k and stay in the speed window requested by the test.



I'm fairly certain that if I'm running into higher HC readings, I should lean out the a/f ratio some, to drop the amount of unburned gas. Any other suggestions? (beyond the normal clean air filter, new plugs, etc)



Just looking for ideas. Probably going to be pulling the FD out of the garage for the first time in over a year soon, which will mean getting emissions done, so that I can get current tabs.


if its only out by 3 ppms i dunno if id even touch the map, it depends on the co a little too. but new plugs/air filter/oil make sure the thing is HOT (beat the snot out of it for 20minutes or so), and that should be your 3 ppm's. if you need more, find out what cell that is on the map, and lean it just a little.



cats are wierd, and the engine interacts with them, sometimes the cat works better with a richer mixture, but it sound like 3ppms, you want to lean it just a bit...
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