Cobb AcessPORT with TURBO Discussion
05-14-2008, 12:36 PM
#378
Yea, I was gonna start over but on the other thread, you told me to stay with this one and you will make adjustment on it...
Not quite. You were too rich no matter what. Misfires are misfires. I wouldn't go above my normal tuning range - I tune to the proper AF and then address the next set of issues.
Putting a screen in front of the MAF is a major change.
Its a good change, but its a huge improvement to the sensor's accuracy.
You need to start over with the base calibrations.
Putting a screen in front of the MAF is a major change.
Its a good change, but its a huge improvement to the sensor's accuracy.
You need to start over with the base calibrations.
Not worth mine or Jeff's headaches...
05-14-2008, 12:57 PM
#382
The turbo upgrade won't change anything.
I was being facetious. The change to the MAF when you add a screen is so massive, its like completely changing the airflow through the motor (as far as the PCM is concerned).
The turbo upgrade just makes the motor ask for more air.
If the MAF is setup correctly, the PCM will just make changes on its own.
I was being facetious. The change to the MAF when you add a screen is so massive, its like completely changing the airflow through the motor (as far as the PCM is concerned).
The turbo upgrade just makes the motor ask for more air.
If the MAF is setup correctly, the PCM will just make changes on its own.
05-14-2008, 02:25 PM
#384
My calibrations assume that the intake and MAF are functioning correctly, by whatever means.
For some, that requires an entire re-design of their intake plumbing.
For others, just a 3.375" straight pipe does the trick.
Some need screens, some do not.
All that matters to me is that the MAF is properly calibrated.
I can tell from the very first feedback I get from someone that has installed their AccessPORT whether or not their intake is properly set up.
For some, that requires an entire re-design of their intake plumbing.
For others, just a 3.375" straight pipe does the trick.
Some need screens, some do not.
All that matters to me is that the MAF is properly calibrated.
I can tell from the very first feedback I get from someone that has installed their AccessPORT whether or not their intake is properly set up.
05-14-2008, 02:57 PM
#385
So the 3.375 is ID, not OD... OD is 3.5 in the Vibrant brand, correct?
I'm trying to get everything I need before I start playing with it again. I have a 3.5 ID already, the 3.5 OD also. I have both original screens as well. Any other suggestions before I start playing with all of this? (yeah, I know, I should connect my LM-01 for datalogging, but it's got a lot of connections and I don't feel like doing all those...)
I'm trying to get everything I need before I start playing with it again. I have a 3.5 ID already, the 3.5 OD also. I have both original screens as well. Any other suggestions before I start playing with all of this? (yeah, I know, I should connect my LM-01 for datalogging, but it's got a lot of connections and I don't feel like doing all those...)
05-14-2008, 03:01 PM
#386
Well, i did mentioned that i added the screen and request for V3 series map with dwell adjusted to start fresh on the other thread...
so... anyway, I'll try to find the best matched map tonight and you can change the dwell setting on that one.
so... anyway, I'll try to find the best matched map tonight and you can change the dwell setting on that one.
05-14-2008, 03:09 PM
#389
yes, you need ID as close to 3.375 as possible. and remeber to add at least one screen~! leaern from my mistake, hehe
So the 3.375 is ID, not OD... OD is 3.5 in the Vibrant brand, correct?
I'm trying to get everything I need before I start playing with it again. I have a 3.5 ID already, the 3.5 OD also. I have both original screens as well. Any other suggestions before I start playing with all of this? (yeah, I know, I should connect my LM-01 for datalogging, but it's got a lot of connections and I don't feel like doing all those...)
I'm trying to get everything I need before I start playing with it again. I have a 3.5 ID already, the 3.5 OD also. I have both original screens as well. Any other suggestions before I start playing with all of this? (yeah, I know, I should connect my LM-01 for datalogging, but it's got a lot of connections and I don't feel like doing all those...)
05-14-2008, 03:12 PM
#390
btw, I didn't notice much change going from no screen to screen. the afrs are consistent both ways. Maybe the maf tubing / intake setup that I have channels the air smoothly enough.
05-14-2008, 03:39 PM
#394
Finally Boosted!!!!!!!
My car is a great example of what the screens do. At first I had no screens. My car would start and then die with the v3_0 calibration. Next, I added a nylon mesh window screen before and after the maf. This caused my car to really hunt for the proper AFR. Then I added a metal mesh screen before and after the maf. The car would run and idle correctly but under decel it would die. Tonight I am going to try a screen before and after the MAF and one at the turbo inlet.
I reset the ECU between each change. With no screens there were no fuel trims because the car would just die. With the nylon screens the fuel trims were negative because the screens were restricting the airflow. With the 2 metal screens the fuel trims were positive.
I reset the ECU between each change. With no screens there were no fuel trims because the car would just die. With the nylon screens the fuel trims were negative because the screens were restricting the airflow. With the 2 metal screens the fuel trims were positive.
05-14-2008, 03:50 PM
#396
I had erratic idle problem and a little rich in boost without the screen.
My car is a great example of what the screens do. At first I had no screens. My car would start and then die with the v3_0 calibration. Next, I added a nylon mesh window screen before and after the maf. This caused my car to really hunt for the proper AFR. Then I added a metal mesh screen before and after the maf. The car would run and idle correctly but under decel it would die. Tonight I am going to try a screen before and after the MAF and one at the turbo inlet.
I reset the ECU between each change. With no screens there were no fuel trims because the car would just die. With the nylon screens the fuel trims were negative because the screens were restricting the airflow. With the 2 metal screens the fuel trims were positive.
I reset the ECU between each change. With no screens there were no fuel trims because the car would just die. With the nylon screens the fuel trims were negative because the screens were restricting the airflow. With the 2 metal screens the fuel trims were positive.