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Idle w/1000cc injectors and 280 cams

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Old Jan 25, 2007 | 04:12 PM
  #16  
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From: h town
All he needs is an o2 simulator.
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Old Jan 25, 2007 | 05:19 PM
  #17  
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From: sc
And a serious garage cleaning
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Old Jan 26, 2007 | 05:37 AM
  #18  
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From: Royse City, TX
You haven't seen my garage since My son was born, I havent had time to get in there since the last big job I did on my car, my car is still apart, and I have tools and parts laying around everywhere. Not to mention boxes from when I moved into my house that I haven't had the time to get through yet.

On a side note, his 280/1000cc idle video is pretty typical of what the car should look/sound like, as long as you can keep the airflow up so the MAF sensor signal doesnt stall, it should run very smoothly as you can see in the video. The only way to get it smoother is to use either an ECU+ to lock the idle frequency or an aftermarket blowthrough MAF setup.
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Old Jan 26, 2007 | 05:50 AM
  #19  
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How are your AFR's at idle (if you have a wideband)? For some reason, i've brought my car to 2 differnt tuners and they can't get the car to idle above the 10.5-11 range. Is this normal it seems really rich at idle. The car idles perfect just like yours did in the video, but it's just rich.
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Old Jan 26, 2007 | 06:00 AM
  #20  
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Sounds awsome bro really good
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Old Jan 26, 2007 | 10:04 AM
  #21  
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From: Royse City, TX
Originally Posted by Dynofrk666
How are your AFR's at idle (if you have a wideband)? For some reason, i've brought my car to 2 differnt tuners and they can't get the car to idle above the 10.5-11 range. Is this normal it seems really rich at idle. The car idles perfect just like yours did in the video, but it's just rich.
Assuming your car is running properly in closed loop, and your O2 sensor is working right, it usually means your fuel trims are out of range.

To be completely honest, I'd question the tuners skills and credability if they cannot get the car to idle properly at the proper 14.7 AFR in closed loop, it should only take about 15 minutes or trial and error to rough it in with the Injector scale and Voltage Latency, then a bit of driving on the road to get the fuel trims at cruise in check.. Then the rest of the tune can be done on a dyno.

10.5/11 is what you would see if you put in big injectors and did nothing to adjust them for idle as your fuel trims would be so far out of range they won't be able to correct..
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