Wow!Thank you for sharing this! Can't wait to to get it on my laptop.
Wow!Thank you for sharing this! Can't wait to to get it on my laptop.
Incredible work LRT.
Dimented24x7 and you don't give yourselves enough credit. Frankly, I wouldn't be taking on my project now if it wasn't for Dimented24x7 and you.
This is probably the wrong place to ask this but i'm wondering what table(s) defined in these XDFs one would use to adjust how fast the RPMs drop off in between shifts on a manual car? i'm using a 2001 f-body LS1 OS to drive an LS4 in my MGB. I have a Ford V8 T5 behind it. The RPMs drop off just a little faster than I'd like.Thank you
Too funny ... a common complaint on a conversion project is the RPM "hanging", or taking too long to return to idle ... you are having the opposite experience.
OK ... couple of assumptions ... that you are using a tune for a manual transmission vehicle, and that you have a clutch switch wired to the PCM (so it knows when you are clutch in / out while changing gears).
If so, then go to the "Idle" folder in the XDF. Take a look at the Rolling Idle and Throttle Follower parameters. You may want to add a small amount of airflow, or slow the decay rate of the removal of Throttle Follower air (extra airflow).
If this does not cause the RPMs to settle more slowly to idle (your goal), then take a look at the Throttle Cracker parameters.
Generally, a small change in airflow may make a significant difference. Proceed slowly, and be prepared for the RPM to "hang" if you go too far.
Thank you for the response, I really appreciate it!Yes, it is manual transmission tune but I don't have a switch on the clutch. I'm right in the middle of installing factory cruise in the car so maybe i can double purpose the clutch switch I'll be installing. Would I wire that to pin 79 on the blue connector? I wonder if just doing that would make a change?Thanks againScott
C1 (Blue) pin 79 is the Skip Shift Solenoid Control; which can cause the first to fourth shift with the T56 transmission.
Clutch Switch(es)
These were used by the OEM for Starting, Cruise Control Release, and Clutch Anticipate.
The Clutch Pedal Position (CPP) Switch or Clutch Anticipate Switch is a normally closed circuit (foot off of the clutch pedal). When the clutch is applied (pedal depressed) this circuit opens (i.e. no current flow).
One side of this switch is wired to ground. The other side of this switch is wired to PCM C1 (Blue) pin 32. The PCM outputs voltage on this circuit.
Cruise Control Module (DBC style)
Camaro versions use a Cruise Control Inhibit Signal, between the PCM and the Cruise Control Module. Truck versions do not.
If you use a Camaro module, then Cruise Control could be inhibited by the PCM for various reasons. I would recommend using a Truck Cruise Control Module.
Both of these modules (Camaro or Truck) use a Cruise Control Release Signal (normally closed 12 volt) and a Brake / Stoplamp Signal (normally open 12 volt). You must use both of these, and the module must "see" the simultaneous reverse logic, or it will inhibit Cruise Control.
The DBC style Cruise Control Modules also require a 4K PPM VSS signal. You can splice into the signal from the PCM to the Speedometer (this is what the OEM did), or repurpose the 128K PPM VSS signal from the PCM (normally connected to the ABS brake system), and change the output to 4K PPM with tuning software.
Just an overview ...
Posting Permissions
Reply With Quote
Bookmarks