D
DAMN YANKEE
Guest
Had an interesting series of discussions with a very knowledgeable VCA member that I have pleaded with to post his most interesting tuning issues.
In short, after a very interesting SRT turbo build out he was having some considerable difficulty with a nasty case of hanging idle and more importantly roughness at 1,500 and 3,500 RPMs. THis would only happen in Closed Loop operations ,that being when the car was using the various feedback systems (think of it as everything we do other than WOT). During Wide Open Throttle, this person achieved a magnificent tune through logging and solid VEC2 (important here folks) tuning. But the idle hang and roughness plagued him.
He called to ask what I recommended, what followed next was so very interesting. He now has a perfectly tuned and running rig.
He still his his VEC2 as it was not the issue.
I'm hoping that like the piece on a Viper Engine Blowing up. The member will step forward and explain how he got it all together for the benefit of all those that may have a simular issue.
Hint.....
O2 sensors, brand of O2 sensors, location of O2 sensors.
Crank sensor and its proper adjustment....
Being able to log and knowing what to look for...
Great review of all the serious mods..
Great review of all the various steps....
Great review of all the proper logging....
Great review of what one can use to diagnose these issues...
Great review of all the possible culprits...
Few are as thorough and fewer still get a TURBO to run as sweet as this one.
How about it Pete?
In short, after a very interesting SRT turbo build out he was having some considerable difficulty with a nasty case of hanging idle and more importantly roughness at 1,500 and 3,500 RPMs. THis would only happen in Closed Loop operations ,that being when the car was using the various feedback systems (think of it as everything we do other than WOT). During Wide Open Throttle, this person achieved a magnificent tune through logging and solid VEC2 (important here folks) tuning. But the idle hang and roughness plagued him.
He called to ask what I recommended, what followed next was so very interesting. He now has a perfectly tuned and running rig.
He still his his VEC2 as it was not the issue.
I'm hoping that like the piece on a Viper Engine Blowing up. The member will step forward and explain how he got it all together for the benefit of all those that may have a simular issue.
Hint.....
O2 sensors, brand of O2 sensors, location of O2 sensors.
Crank sensor and its proper adjustment....
Being able to log and knowing what to look for...
Great review of all the serious mods..
Great review of all the various steps....
Great review of all the proper logging....
Great review of what one can use to diagnose these issues...
Great review of all the possible culprits...
Few are as thorough and fewer still get a TURBO to run as sweet as this one.
How about it Pete?
Last edited by a moderator:
