As I mentioned in my previous posts, I need to make some adjustments to my existing FAST B2B/WBO2 configuration, and would welcome some input. The motor is a turbo 2.4l four cylinder that has recently been rebuilt. Prior to rebuilding the motor the FAST system had been professionally tuned by a very good local tuner.
When we rebuilt we decided to open the combustion chambers by 4cc, which lowered compression to ~8.25:1, so that I can ultimately run more timing. We also changed to a more radical cam. To get the engine running with these changes, my tuner suggested increasing the value for the injector size by about 10%, which leaned things out and seemed to make the existing values fall in line.
While I plan on taking the motor back to the same tuner for a full retune, I need to do some touch up on these tables first so I can finish breaking in the new motor.
The link below contains the current .gct file and a 90 second log file from this morning (street driving up a fairly steep hill near where I live, max boost currently limited to ~5 psi). I would welcome whatever comments or suggestions anyone might care to offer.
In looking at the overlays on the VE table, there are a few instances where I'm maxing out the AF correction (some -25%, others +25%), and more instances where I'm off by more than +/- 10%. Overall, however, the engine feels like its running well, so I think the AF table is still pretty close, and I would like to try working on the VE table to reduce the AF correction swings. Does this sound like the right approach?
I'm still climbing the learning curve on this, so I would welcome any feedback anyone would care to give on possible changes. My files can be downloaded from this link:
http://www.well.com/user/mosk/images/jeffs_ccom_files.zip
Thanks, and sorry for the novel.
Jeff
When we rebuilt we decided to open the combustion chambers by 4cc, which lowered compression to ~8.25:1, so that I can ultimately run more timing. We also changed to a more radical cam. To get the engine running with these changes, my tuner suggested increasing the value for the injector size by about 10%, which leaned things out and seemed to make the existing values fall in line.
While I plan on taking the motor back to the same tuner for a full retune, I need to do some touch up on these tables first so I can finish breaking in the new motor.
The link below contains the current .gct file and a 90 second log file from this morning (street driving up a fairly steep hill near where I live, max boost currently limited to ~5 psi). I would welcome whatever comments or suggestions anyone might care to offer.
In looking at the overlays on the VE table, there are a few instances where I'm maxing out the AF correction (some -25%, others +25%), and more instances where I'm off by more than +/- 10%. Overall, however, the engine feels like its running well, so I think the AF table is still pretty close, and I would like to try working on the VE table to reduce the AF correction swings. Does this sound like the right approach?
I'm still climbing the learning curve on this, so I would welcome any feedback anyone would care to give on possible changes. My files can be downloaded from this link:
http://www.well.com/user/mosk/images/jeffs_ccom_files.zip
Thanks, and sorry for the novel.
Jeff
