02 Sensor/ SERT HELP!!
Road Captain
Joined: Mar 2006
Posts: 741
Likes: 11
From: West Central WI
RE: 02 Sensor/ SERT HELP!!
ORIGINAL: Shovelhead Bob
Wow.... joj.... Start off with this map.... #67 (176AE104)... That is the closest you have to establish a base map... Next step is to max out the Closed Loop Bias table(s) and set your Rev Limit to 6500 (No higher, "B" motors don't handle higher revs than that well, counter balancers and all can get out of sync)....And I see that you are using the "Heavy Breather".. if so, you will also need to increase your engine displacement by 10 inches.... that will help to compensate for the extra air being introduced into the combustion chamber... that 10 inches will fatten it up 1 AFR point, if you are using the SE Air Cleaner with the stock cover, leave the Tuning constants where they are.....
Depending on the baffles (if you could call them that, cheese graters is all they are), you will notice a pop on decel... if this becomes annoying, you need to seek out a knowledgeable SERT TRAINED TUNER....
Understand this, the SERT is a TOOL, which allows the operator to get into the ECM and manipulate the various data tables to optimize performance, power and rideability...
FWIW, at our shop, we charge $250 for a full tune, and our Winter special was purchase a SERT, get a free tune...
And if you need any references for me... I think Doc 1 will vouch for me, and I definitely will for his knowledge...
You made a good choice in retaining the stock ECM and o2's, and utilizing the SERT...
Ping Doc 1 or myself with questions, concerns, etc....
Wow.... joj.... Start off with this map.... #67 (176AE104)... That is the closest you have to establish a base map... Next step is to max out the Closed Loop Bias table(s) and set your Rev Limit to 6500 (No higher, "B" motors don't handle higher revs than that well, counter balancers and all can get out of sync)....And I see that you are using the "Heavy Breather".. if so, you will also need to increase your engine displacement by 10 inches.... that will help to compensate for the extra air being introduced into the combustion chamber... that 10 inches will fatten it up 1 AFR point, if you are using the SE Air Cleaner with the stock cover, leave the Tuning constants where they are.....
Depending on the baffles (if you could call them that, cheese graters is all they are), you will notice a pop on decel... if this becomes annoying, you need to seek out a knowledgeable SERT TRAINED TUNER....
Understand this, the SERT is a TOOL, which allows the operator to get into the ECM and manipulate the various data tables to optimize performance, power and rideability...
FWIW, at our shop, we charge $250 for a full tune, and our Winter special was purchase a SERT, get a free tune...
And if you need any references for me... I think Doc 1 will vouch for me, and I definitely will for his knowledge...
You made a good choice in retaining the stock ECM and o2's, and utilizing the SERT...
Ping Doc 1 or myself with questions, concerns, etc....
Outstanding HDF Member
Joined: Apr 2006
Posts: 2,537
Likes: 21
RE: 02 Sensor/ SERT HELP!!
Since he is planning on using the SE Heavy Breather, that increases the amount of free air introduced into the Intake tract. It come out to about 1 whole AFR point....
By increasing the displacement by 10 inches (to a 106"), you are richening the AFR 1 whole point. It does not affect anything but the VE's (No, they do not DIRECTLY CHANGE), but they are now computed for a bigger motor. 10 inches of displacement +/- is proportional to the AFR requirements.
Adaptive fuel is a constant, and will always be there and always operational as long as there is a Closed Loop section in the Desired AFR table.
By increasing the displacement by 10 inches (to a 106"), you are richening the AFR 1 whole point. It does not affect anything but the VE's (No, they do not DIRECTLY CHANGE), but they are now computed for a bigger motor. 10 inches of displacement +/- is proportional to the AFR requirements.
Adaptive fuel is a constant, and will always be there and always operational as long as there is a Closed Loop section in the Desired AFR table.
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