Cobb AccessPORT Discussion
04-10-2008, 08:30 AM
#1601
Registered
Join Date: Sep 2006
Location: Madison, WI
Posts: 1,202
Likes: 0
Received 0 Likes
on
0 Posts
Well after a few days on 1b_1b my LTFT has settled at -1[ I'm not checking my trims Jeff 
] Idle AFR is at 15.2, WOT AFR is 11.0 and high load but not WOT AFR is 12.2 - 13.5. I'll stay with this map until Jeff gets back and I get my stage 2 since I think that may lean out my WOT AFR.
] Idle AFR is at 15.2, WOT AFR is 11.0 and high load but not WOT AFR is 12.2 - 13.5. I'll stay with this map until Jeff gets back and I get my stage 2 since I think that may lean out my WOT AFR.
04-10-2008, 10:45 AM
#1603
Unregistered User
iTrader: (1)
Join Date: Oct 2004
Location: Spring/The Woodlands
Posts: 235
Likes: 0
Received 0 Likes
on
0 Posts
I did some logging yesterday on MM1b.3b. Here are second and third gear runs. AFR's look good, but they differ from what the AP shows me real time. My AP is typically showing 11.5 AFR's above 6k RPM's. I still haven't figured that out.
Dan said the Canscan USB should be real close. He told me the software takes the value from the can and multiplies it by 14.63 for the output. I'm waiting to find someone local who has logging capabilities so I can do back to back logging.
Cel
Dan said the Canscan USB should be real close. He told me the software takes the value from the can and multiplies it by 14.63 for the output. I'm waiting to find someone local who has logging capabilities so I can do back to back logging.
Cel
04-10-2008, 12:34 PM
#1605
Administrator
iTrader: (7)
Razz: sending you a PM...
04-10-2008, 02:19 PM
#1607
Registered
Join Date: Sep 2003
Location: Diamond Bar, Ca
Posts: 1,473
Likes: 0
Received 0 Likes
on
0 Posts
I did some logging yesterday on MM1b.3b. Here are second and third gear runs. AFR's look good, but they differ from what the AP shows me real time. My AP is typically showing 11.5 AFR's above 6k RPM's. I still haven't figured that out.
Dan said the Canscan USB should be real close. He told me the software takes the value from the can and multiplies it by 14.63 for the output. I'm waiting to find someone local who has logging capabilities so I can do back to back logging.
Cel
Dan said the Canscan USB should be real close. He told me the software takes the value from the can and multiplies it by 14.63 for the output. I'm waiting to find someone local who has logging capabilities so I can do back to back logging.
Cel
04-10-2008, 05:05 PM
#1613
Dongbag extrordinare
Join Date: Nov 2004
Location: Away from the fruits of my labor
Posts: 1,090
Likes: 0
Received 0 Likes
on
0 Posts
04-10-2008, 08:04 PM
#1616
The car runs fantastic now, but at high load (with more than 8 psi) it does some kind of bogging thing with a weird noise. Jeff says he knows what it is. It sounds similar to how my car sounded like on the dyno when the int-x was getting tuned with the larger injectors (see video at 1:00 min in http://youtube.com/watch?v=v5YDqSnvpwo ), but in this case the AFR isn't <10.
I data logged a quick acceleration run on the drive to work. I was in either 4th or 5th gear. As soon as the bogging thing takes place, I let off the throttle and stopped the logging.
You can see how quickly the car accelerates. The AFR logged is dead solid at 11 for some reason and doesn't even slightly deviate -- is this even possible?
Anyway, check it out.
I data logged a quick acceleration run on the drive to work. I was in either 4th or 5th gear. As soon as the bogging thing takes place, I let off the throttle and stopped the logging.
You can see how quickly the car accelerates. The AFR logged is dead solid at 11 for some reason and doesn't even slightly deviate -- is this even possible?
Anyway, check it out.
04-10-2008, 08:19 PM
#1617
Finally Boosted!!!!!!!
Could you be maxing out the OEM wideband? Your lamda value is about 0.758169. I think that is about as rich as mine goes but I have never data logged anything that rich trough the OBDII.
04-10-2008, 08:21 PM
#1618
it's recorded as 0.76 during that entire range. I wasn't looking at my wideband gauge so I can't compare for that specific situation. However if it is too rich, then that would explain why it sounds and acts like my car when it was too rich with the int-x.
04-10-2008, 08:29 PM
#1620
When the throttle wasn't as extreme, here's what it looked like:
It goes right to 11 AFR in boost. Pretty good considering the injectors are not standard and the staging was all done with some math calculations and they turned out this nicely.
Big kudos to Jeff
Code:
Throttle % vs AFR 40.78 12.08 42.35 11.56 45.49 11.52 47.84 11.69 49.02 11.58 49.02 11.53 50.59 11.42 50.59 11.39 50.59 11.32 50.59 11.32 50.59 11.32 50.59 11.31 51.37 11.3 52.16 11.3 52.94 11.31 54.9 11.31 56.08 11.25 56.47 11.22 56.47 11.21 56.47 11.22 57.25 11.28 57.65 11.27 57.25 11.27 57.25 11.27 56.86 11.28 56.86 11.24 56.86 11.2 56.86 11.19 56.86 11.24 56.47 11.22 54.9 11.2 54.9 11.26 54.9 11.33 53.73 11.33 53.33 11.32 53.33 11.25 51.37 11.31 50.59 11.25 49.02 11.26 45.1 11.2 43.53 11.12 41.57 11.21 44.31 12.46 46.27 11.86 47.06 11.7 47.84 11.94 48.63 11.88 50.2 11.7 51.37 11.44 51.37 11.25 52.16 11.19 53.73 11.28 54.9 11.36 55.69 11.35 56.08 11.3 56.08 11.25 56.08 11.22 54.9 11.28 54.12 11.27 50.59 11.22 47.06 11.2 44.31 11.09 And here's some regular driving: 16.86 14.36 16.47 14.16 16.08 14.23 16.08 14.36 16.08 15.36 16.86 14.66 16.86 14.37 16.86 15.02 16.47 15.04 16.08 14.61 16.47 14.22 16.47 14.54 16.08 14.45 16.47 14.13 16.47 14.04 16.47 14.72 16.08 14.64 16.08 15.05 15.69 14.94 15.69 14.62 16.08 14.61 16.08 14.27 15.69 14.07 15.29 14.36 15.69 14.31 15.29 14.54 15.29 14.93 15.29 14.71 15.29 15.03 15.29 14.57 15.29 14.73 15.29 14.44 15.29 14.38 15.29 14.08 15.29 14.58 15.29 14.89 15.69 15.1 15.69 15.1 16.08 14.56 16.08 14.34 16.47 14.51 16.86 14.68 16.86 14.75 16.86 14.65 16.86 14.45 16.47 14 16.47 14.16 16.08 14.85 16.08 14.67 16.47 14.67 16.47 14.34 16.47 14.28 16.47 14.74 16.08 14.6 15.29 14.71 13.73 14.58 13.33 14.56 12.94 14.45 12.94 14.21 12.94 14.24 12.55 14.17 12.55 14.31 12.55 14.85 12.55 14.27 12.55 14.35 12.55 14.26 12.55 14.68 12.55 15.1 12.55 14.33 12.55 14.37 12.55 14.29 12.55 14.73 12.55 14.67 12.94 14.9 12.94 14.31 13.33 14.33 12.94 14.33 12.94 14.44 12.94 14.79 12.94 14.88 12.94 14.54 12.94 14.55 12.94 14.57 12.94 14.75 13.33 14.54 16.08 15.02 17.25 14.7 18.04 14.51 19.22 14.2 21.57 14.68 22.35 14.8 23.14 13.93 23.14 13.69 23.53 13.59 23.53 13.98 23.53 14.15 23.53 14.32 23.53 14.54 23.14 14.69 22.75 14.74 23.14 14.74 22.75 14.72 22.35 14.43 21.96 14.53 20.78 14.53 20 14.44 18.82 14.46 18.43 14.4 18.82 14.88 19.22 16.45 19.22 16.43 19.22 14.85 19.61 13.8 19.22 14.14 19.22 14.55 19.22 14.17 19.22 14.37 19.22 14.59 19.22 14.8 18.82 14.71 18.82 14.31 18.82 14.11 18.82 14.29 18.82 14.62 18.43 14.58 18.43 14.85 18.43 14.83 18.43 14.4 18.82 14.47 18.82 14.59 19.22 14.84 18.82 14.92 18.43 14.06 18.04 14.95 17.25 15 16.47 14.54 16.08 15 15.69 14.99 14.9 15.23 13.73 15.12 12.94 14.7 12.55 14.28 12.55 14.38 12.16 14.54 11.76 14.35 11.76 13.9 11.37 13.82 11.37 14.07 11.37 14.29
Big kudos to Jeff
04-10-2008, 08:52 PM
#1623
the afrs were too lean not too long ago. I redid the intake pipes with ceramic coating and removed the screen before the maf. The couplers for the maf tube are at a better angle too. I am running the same tuned map, and now the AFRs are good. So this is the only thing about the AP so far that has me scratching my head.
The AFRs are consistent though - so as long as I don't change anything I expect it to continue to run this way.
The AFRs are consistent though - so as long as I don't change anything I expect it to continue to run this way.