Cobb AccessPORT Discussion
ahh...... 
03-19-2008, 04:16 PM
#505
I may crank the OMP up even more in future calibrations ( raised the minmum everywhere from step 8 to step 11 and an equal 20% or so everywhere else), but I need to verify that it won't smoke or cause a lot of nastiness to accumulate.
03-19-2008, 04:53 PM
#507
LTFT is reporting 5 meow...STFT still fluxes +/- 2 around 0...AFR from 20->13 with 14.2 being avg...the catless stink is almost gone finally...leaning things out soon should make things right as rain...
Last edited by eviltwinkie; 03-19-2008 at 04:59 PM.
03-19-2008, 05:29 PM
#508
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Just got my AP... so far so good
- Connected and flashed without any problems
- Car started with the groggy idle it always has after a dealer reflash
- Drove it around a little bit in the low to mid rpms with loads under 60% and it drives wonderfully
- On 2 occasions at stop signs it idled so damn smooth and quietly I kept looking at the tach to make sure it was running yet... and this was with the radio off
So as i said so far so good. It flashed fine. It runs fine. I scrolled through all the AP live data stuff without a hitch. Currently the LTFT is still between 0 and -1 so I will monitor after my commute back and forth to work tomorrow and see where it settles.... hopefully then the monsoon will be over and i can open her up a bit more
- Connected and flashed without any problems
- Car started with the groggy idle it always has after a dealer reflash
- Drove it around a little bit in the low to mid rpms with loads under 60% and it drives wonderfully
- On 2 occasions at stop signs it idled so damn smooth and quietly I kept looking at the tach to make sure it was running yet... and this was with the radio off
So as i said so far so good. It flashed fine. It runs fine. I scrolled through all the AP live data stuff without a hitch. Currently the LTFT is still between 0 and -1 so I will monitor after my commute back and forth to work tomorrow and see where it settles.... hopefully then the monsoon will be over and i can open her up a bit more
03-19-2008, 06:10 PM
#509
Got my 1 1/4" to 3/4" reducer hose today. Just installed it on my BOV. Tomorrow I'll report back with my findings.
I would have liked the hose to be black, but given how hard it was to find a single reducer between those sizes, I am not going to be picky.
I would have liked the hose to be black, but given how hard it was to find a single reducer between those sizes, I am not going to be picky.
03-19-2008, 06:26 PM
#510
That's a really evil looking assembly you have there!
I'm still waiting on the filter. FedEX says it will be here today.
I'll have your intake fitted tonight and I'll ship it tomorrow if they show up today.
BTW - I have 3 AccessPORTs unspoken for if anyone wants one for next week delivery.
I'm still waiting on the filter. FedEX says it will be here today.
I'll have your intake fitted tonight and I'll ship it tomorrow if they show up today.
BTW - I have 3 AccessPORTs unspoken for if anyone wants one for next week delivery.
03-19-2008, 06:31 PM
#511
I played around a bit today on the drive home. I think the biggest advantage for the AccessPort is that the car doesn't hit any thresh hold that activates a boost map. It just measures air, and adds the appropriate fuel. There is also no course map that can sometimes toggle an on/off response with the fueling or idling. It just works, and it's seamless. It's really quite refreshing.
03-19-2008, 06:33 PM
#512
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r0tor,
good news indeed! glad to see a positive "no issues" post. now, i'm watching for my FI amigos to post their experiences. i hope they are just as successful.
Double D
good news indeed! glad to see a positive "no issues" post. now, i'm watching for my FI amigos to post their experiences. i hope they are just as successful.
Double D
03-19-2008, 06:36 PM
#513
there is no doubt this works. I felt like my car was "naked" running around without an additional system to manage fuel, but it runs great.
It's still a little rough from the crappy intake, but it's perfectly drivable. The bov not being circulated caused most of my issues since it's so sensitive. Slight throttle lift causes it to open up and stay open for a few seconds. That rich condition causes the car to bog down. As I said, this issue is unique to the synchronic BOV since every other BOV that I know of would not be able to respond to such slight throttle input. Synchronic BOV ships with a recirculate fitting, so there's nothing to buy, just grab a hose and hook it up.
It's still a little rough from the crappy intake, but it's perfectly drivable. The bov not being circulated caused most of my issues since it's so sensitive. Slight throttle lift causes it to open up and stay open for a few seconds. That rich condition causes the car to bog down. As I said, this issue is unique to the synchronic BOV since every other BOV that I know of would not be able to respond to such slight throttle input. Synchronic BOV ships with a recirculate fitting, so there's nothing to buy, just grab a hose and hook it up.
03-19-2008, 06:39 PM
#514
I can't explain it adequately, but I always had a "waiting for the other shoe to drop" sensation when I drove my turbo RX-8.
The AccessPORT has almost completely eliminated that.
03-19-2008, 06:44 PM
#515
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J,
Great to hear this as well! I have the Mazsport CAI and I remember reading somewhere on here that it would actually be a good choice. I'll be watching your results and others before I jump aboard.
Double D sends...
Great to hear this as well! I have the Mazsport CAI and I remember reading somewhere on here that it would actually be a good choice. I'll be watching your results and others before I jump aboard.
Double D sends...
03-19-2008, 06:49 PM
#517
Jeff, is it true that the larger the maf housing, the more granular you'll be able to fine tune the fuel vs airflow? It seems like you can get a better idea what's going on if you're looking at inches, instead of millimeters. So small changes in airflow will be easier/more apparent to the MAF when the area being read is larger.
Maybe that's why the 2 5/8" maf housing sucked so badly.
Maybe that's why the 2 5/8" maf housing sucked so badly.
03-19-2008, 07:02 PM
#518
No, its the opposite - the smaller the MAF housing, the more granular.
However, the range goes down.
We need to be able to accurately measure from 5 g/sec to 330 g/sec or so on a turbo car.
On our 5v MAF in the OE tube, that is 1.2v to 4.69v. The MAF tends to run out of accuracy beyond 4.79v and is way too sensitive below 1v.
With a 3" MAF tube, you are maxing out the MAF at only 293 g/sec or so and at idle, where it expects to see 1.2v, it is looking more like 1.35v.
So, with a ton of scaling (about 15%) we can make the MAF look OK on the bottom end.
However, we have no effectively made it unsafe to drive into full boost.
Fortunately, the response curve of the MAF is more or less exponential, so the granularity suffers very little at the bottom end when the MAF tube goes up in size 10% - 15%.
However, the range goes down.
We need to be able to accurately measure from 5 g/sec to 330 g/sec or so on a turbo car.
On our 5v MAF in the OE tube, that is 1.2v to 4.69v. The MAF tends to run out of accuracy beyond 4.79v and is way too sensitive below 1v.
With a 3" MAF tube, you are maxing out the MAF at only 293 g/sec or so and at idle, where it expects to see 1.2v, it is looking more like 1.35v.
So, with a ton of scaling (about 15%) we can make the MAF look OK on the bottom end.
However, we have no effectively made it unsafe to drive into full boost.
Fortunately, the response curve of the MAF is more or less exponential, so the granularity suffers very little at the bottom end when the MAF tube goes up in size 10% - 15%.
03-19-2008, 07:12 PM
#519
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I've put that complaint in for review.
It seems everyone has an issue with the dongle.
Putting them here is useful because others might experience the same issues.
What is your MAF situation? I don't remember the specifics of your intake. Is it the stock GReddy stuff?
The P0456 is weird. Its usually the gas cap, but that is one of the DTCs that should be masked.
If you uninstall the AP and drive the car around the block (NOT IN BOOST), are the STFT/LTFT still strange?
It sounds to me like there is something "open" in your setup, like a hose off somewhere or a BOV.
It seems everyone has an issue with the dongle.
Putting them here is useful because others might experience the same issues.
What is your MAF situation? I don't remember the specifics of your intake. Is it the stock GReddy stuff?
The P0456 is weird. Its usually the gas cap, but that is one of the DTCs that should be masked.
If you uninstall the AP and drive the car around the block (NOT IN BOOST), are the STFT/LTFT still strange?
It sounds to me like there is something "open" in your setup, like a hose off somewhere or a BOV.
Ok, uninstalled the AP, and it doesn't let me do live data so I'm guessing you meant stock map so I reinstalled it and ran the Cobb "stock style" map, and after warm up, at idle, stft was pinned at -25. So right now it seems that of all of the ones i have up to 3.5b, which is on now again, this one, at idle, seems to average closest to zero, but still fluctuates quite a bit from -8 to 8. I still have all the problems I mentioned in my previous post though. Should I leave it here for now still after all the drive cycles already or does something need to be changed or is there any other data you need me to collect?
Last edited by Grouch; 03-19-2008 at 07:15 PM.
03-19-2008, 07:20 PM
#521
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Yup, it's the stock greddy turbo kit stuff. I didn't get the BOV welded in yet because I wasn't sure if keeping the greddy tubes were a good idea in the long run. What do you recommend? I can get the BOV flanges welded in maybe tomorrow.
Ok, uninstalled the AP, and it doesn't let me do live data so I'm guessing you meant stock map so I reinstalled it and ran the Cobb "stock style" map, and after warm up, at idle, stft was pinned at -25. So right now it seems that of all of the ones i have up to 3.5b, which is on now again, this one, at idle, seems to average closest to zero, but still fluctuates quite a bit from -8 to 8. I still have all the problems I mentioned in my previous post though. Should I leave it here for now still after all the drive cycles already or does something need to be changed or is there any other data you need me to collect?
Ok, uninstalled the AP, and it doesn't let me do live data so I'm guessing you meant stock map so I reinstalled it and ran the Cobb "stock style" map, and after warm up, at idle, stft was pinned at -25. So right now it seems that of all of the ones i have up to 3.5b, which is on now again, this one, at idle, seems to average closest to zero, but still fluctuates quite a bit from -8 to 8. I still have all the problems I mentioned in my previous post though. Should I leave it here for now still after all the drive cycles already or does something need to be changed or is there any other data you need me to collect?
stock style map on FI
03-19-2008, 07:27 PM
#522
Well, I left my scanalyser cable at home today, so on the way home from work I could not do any logging. But on another note, the car drives wonderfully, and I'm still playing with stage 1. third gear on the highway puts a smile on my face!
When my Mazsport ignition and catless midpipe get here, then I will try something more aggressive.
When my Mazsport ignition and catless midpipe get here, then I will try something more aggressive.
03-19-2008, 07:52 PM
#525
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What would the AP or any other device (Hymee, etc) need to have in order for MM to say, "The device has completely eliminated that."
This maybe as good as it gets, but I'm just curious what a true expert would recommend to manufacturers based on his experiences.
Double D
This maybe as good as it gets, but I'm just curious what a true expert would recommend to manufacturers based on his experiences.
Double D