350 cc306 AFR PCM tuning thread
06-01-2012, 09:45 PM
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350 cc306 AFR PCM tuning thread Ok I'm going to tune!
First question: I searched wideband o2 datamaster to find a how-to on installing to log with A/C input but could not find the thread. I'd like to know how and what's the best sensor to run? Placement in my collector? Two sensors or one?
Thank you!
First question: I searched wideband o2 datamaster to find a how-to on installing to log with A/C input but could not find the thread. I'd like to know how and what's the best sensor to run? Placement in my collector? Two sensors or one?
Thank you!
06-01-2012, 11:58 PM
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i found the thread a few years ago on camaroz28.com
it is called: Logging wideband O2 with stock PCM and Datamaster – WRITEUP
one of the requirements is a wideband that provides linear 0-5V analog output. the AEM wideband is popular
you should have the sensor as close as possible. several friends run it in the collector near the O2 bung and having only one side is fine. personally mine is run at the merge in the Y-pipe as i was more concerned about WOT. i dont know anyone ballin enough to run 2 sensors.
it is called: Logging wideband O2 with stock PCM and Datamaster – WRITEUP
one of the requirements is a wideband that provides linear 0-5V analog output. the AEM wideband is popular
you should have the sensor as close as possible. several friends run it in the collector near the O2 bung and having only one side is fine. personally mine is run at the merge in the Y-pipe as i was more concerned about WOT. i dont know anyone ballin enough to run 2 sensors.
06-02-2012, 12:08 AM
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I am using a Dynojet Wideband Commander and here is a link to the instructions I used to get it working. http://www.camaroz28.com/forums/comp...riteup-535603/
06-12-2012, 03:50 AM
#5
Remember that the o2 feedback is just a tool. Listening to the motor, and feeling the response from tuning changes are also important tools. Overlap does funky things to an o2 sensor, and it will indicate a leaner condition than the cylinder is actually seeing. I run 14.2:1 indicated at idle, who knows what the "actual" a/f is, but that's what the motor likes. I like to make a big change in A/F in each direction to see how the motor responds. Then go back to your original setting and creep in the direction of the "better" big change. I dunno if that makes sense, but it has helped me tuning large cams. Sometimes you get caught giving the motor what you think it wants, instead of going against better judgment and experimenting with "backwards" changes. Watch your MAP values closely, more vacuum (smaller kpa value) is the goal with spark and a/f changes.
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06-22-2012, 12:37 PM
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Remember that the o2 feedback is just a tool. Listening to the motor, and feeling the response from tuning changes are also important tools. Overlap does funky things to an o2 sensor, and it will indicate a leaner condition than the cylinder is actually seeing. I run 14.2:1 indicated at idle, who knows what the "actual" a/f is, but that's what the motor likes. I like to make a big change in A/F in each direction to see how the motor responds. Then go back to your original setting and creep in the direction of the "better" big change. I dunno if that makes sense, but it has helped me tuning large cams. Sometimes you get caught giving the motor what you think it wants, instead of going against better judgment and experimenting with "backwards" changes. Watch your MAP values closely, more vacuum (smaller kpa value) is the goal with spark and a/f changes.
