Barn motor and tranny swap

[larrym]

Middle for mine.

[Steve Wood]

probably end up at the short one for the best launch...maybe not

[good2win22]

Made my first little road trip today after the swap. Went into Nitrous Outlet in Waco to meet a friend to wanted a set of headers that I had.  35 miles one way. Changed the oil and filter before leaving and reset the ECM before leaving on the trip. Some observations I had while ECM is in blm learning mode and viewing the wideband guage. Cruising at 65, blm at 131 so it's adding a bit of fuel but wideband is showing a bit on the rich side of stoich at 14 - 14.3. CC's we're counting at an acceptable speed.


After staying for a while in Waco, I head home. ECM is now not stuck in learning mode as much and crushing at 65 on the way home I noticed that BLM has now come down to 127 and wideband is at 14.2 - 14.6. CC's still counting same as before.  Only difference is that the ambient temp has dropped a few degrees. 


Thoughts?  Can the SD chip allow fueling changes at cruise?


BTW, car did great, not a single hiccup.  (The proverbial knock on wood sign)

[Scoobum]

I know zero about the SD chip. Steve should be able to help you with it.

[Steve Wood]

Yes, it can.  I'm running the SD1

[larrym]

If what? Would you not log the the VE table and then adjust it at that load point and rpm? I don't run a SD chip I have been researching them. Would you have too adjust the AFR table as well in those cells? What triggers the WB correction?

[Steve Wood]

No ifs, that was Google keyboard helping me out

[larrym]

Lol

[motorhead]

Made my first little road trip today after the swap. Went into Nitrous Outlet in Waco to meet a friend to wanted a set of headers that I had.  35 miles one way. Changed the oil and filter before leaving and reset the ECM before leaving on the trip. Some observations I had while ECM is in blm learning mode and viewing the wideband guage. Cruising at 65, blm at 131 so it's adding a bit of fuel but wideband is showing a bit on the rich side of stoich at 14 - 14.3. CC's we're counting at an acceptable speed.


After staying for a while in Waco, I head home. ECM is now not stuck in learning mode as much and crushing at 65 on the way home I noticed that BLM has now come down to 127 and wideband is at 14.2 - 14.6. CC's still counting same as before.  Only difference is that the ambient temp has dropped a few degrees. 


Thoughts?  Can the SD chip allow fueling changes at cruise?


BTW, car did great, not a single hiccup.  (The proverbial knock on wood sign)

Was there a shift in temperature or barometric pressure?  Hell, it could have just been the engine breaking in/getting comfortable.  I have seen as much as 15% difference in the fuel trims (both VE and MAF) from -40*C to 18*C in my TBSS, so whatever the % range from 131 to 127 is could be pretty normal deviation from day to day.  Obviously BLM and INT being short and long term adjustments.

And yes, you can chase the VE table up and down to compensate for the trims if they get way out of line.

[good2win22]

About a 3% difference between the numbers Mike.  Temp drop was the only significant difference in weather conditions and it wasn't that much.  Went from 84 on the way over down to about 75 on the way back. 

My observation was more directed at the difference in readings between the 2 sensors.  NB wanting to add fuel when WB says a little on the rich side and the opposite on the way home.  With the 5.7 chip, there is no option to tune cruise conditions

[good2win22]

Installed the TA rear diff girdle this evening. Man! Real estate is at a premium back there with the Helwig bar and RJC muffler. Going to have to reposition the muffler this weekend and adjust the position of the bar on the axle tube

[larrym]

The cross flow muffler? That would be tight!

[Scoobum]

Tight...but lighter than my ATR dual exhaust.

[TexasT]

The cross flow muffler? That would be tight!

It sounds pretty good too.

[Scoobum]

Sounds good in the vid on RJC's site. Was about to order one myself when it first came out...but this ATR unit came up from my engine builder in Montreal.