Setting up a bin for modified engine.

[EagleMark]

Lot's of modified engines and swaps going around and tuning issues I thought we could put together what would you do to bin file before you even started the motor?

Motor:
Built 357 ci..500 lift on int. and .ex 218 and 228 dur. at .050 112 ls 4 deg. built in adv. stock heads? ,flattop pist.roller cam and roller rockers ,ground down tbi body.adj fpr,cop car injectors running 14 lbs fuel press.

Trans:
Maybe we cover all?

ECM:
1227747 $42-1227747-V5.xdf and $42-1227747-V5.adx

Vehicle:
Maybe we cover all?


This started in another thread but thought it would be a better separate topic. I'm sure there will be a lot and in the end will can have them in order.

How about finding the closest bin to your application...454, 350, 305, 4.3, whatever, along with the the right trans? Non-PCM automatic, PCM automatic, or manual?

What's the estimated HP? Have you calculated the fuel pressure needed to support this with your injectors? Calculated BPW? Have injectors serviced!

That cam is not too much bigger than mine. To get the idle inline, I would lock it in Open Loop and tweak the 6 or 9 VE and spark cells right around where it idles until you get it right. That is what I did, a Wideband is very helpful with that, but a Narrowband should work OK, just shoot for a steady-ish 0.450 V from the O2.

Where is the O2 sensor now compared to when it was stock? How far a difference? Convert it to percent and adjust "Integrator Delay Vs. Airflow"

Proportional Gains vs O2 Error - "PRP - Gain vs. O2 Error" and the multiplier " PRP - Gain vs. Air Flow" need to be reduced 25% to 50% depending on cam and the bin, some bins are 4 times as much as others.

Add 2-5 degrees of idle timing, cams love timing at idle and will often smooth out a "hunting" idle. Increase idle speeds by 100-150RPM depending upon how aggressive cam is. More airflow as well, again depends upon how aggressive the cam is. Don't even both trying to tune for partial throttle/WOT without getting the idle squared away first.

What about turning off EGR? Or other items not on motor?

[EagleMark]

Come on, someone has ideas?

1. Where is the O2 sensor now compared to when it was stock? How far a difference? Convert it to percent and adjust "Integrator Delay Vs. Airflow"

2. Proportional Gains vs O2 Error - "PRP - Gain vs. O2 Error" and the multiplier " PRP - Gain vs. Air Flow" need to be reduced 25% to 50% depending on cam.

[brianko]

Add 2-5 degrees of idle timing, cams love timing at idle and will often smooth out a "hunting" idle. Increase idle speeds by 100-150RPM depending upon how aggressive cam is. More airflow as well, again depends upon how aggressive the cam is. Don't even both trying to tune for partial throttle/WOT without getting the idle squared away first.

[dyeager535]

What about turning off EGR? Doesn't EGR potentially cause issues? As I recall it's requested far more often than just at cruise. I guess AIR doesn't matter on the '7747?

Turning off ALDL spark advance?

[EagleMark]

That is more for data logging but good point to turn off items no longer on motor. You made it to first post as edited quote.

Some 7747 do have AIR and AIR enabled, but that's it, everything is handled mechanically.
EDIT: Wrong! Looking through the hack there is more but no one ever put them in the mask/XDF.

[dyeager535]

How about finding the closest bin to your application...454, 350, 305, 4.3, whatever, along with the the right trans? Non-PCM automatic, PCM automatic, or manual?