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Mar 21, 2008 | 07:17 AM

#626

eviltwinkie

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From: everywherez...

Quote:

Originally Posted by r0tor

I'm starting to winder if my lean condition was just a problem with lag in reporting....

I switched to the Cobb Stage 1 map yesterday and my car is running pretty good. Its pulling no LTFT. So i romp on it in 2nd gear this morning and watch the AP display for the afr's. I'm getting up to speed and by 7k again i'm seeing 14's again! I'm thinking WTF! Right at the time I leave completely off the gas around 8k, i see 13.6, 13.1, 12.6 flash quickly on the display and then it goes to the 20.3 ratio i would expect with my being off the gas and engine braking.

So it looked like that I didn't get the afr displayed I expected (the 20.3) for a good 2 sec or so... which in 2nd gear 2 sec can be a pretty large amount of rpms at WOT. So i'm wondering if the problem is just in reality lag in the AP display. Perhaps I will risk melting my cat tonight and log with the CANScan.

Yes...its simply LAG in reporting...I have "adjusted" my perception to compensate for the lag time...

On a WOT run for example, the AFR displayed was/is probably the AFR from 1-2 seconds prior...

Mar 21, 2008 | 07:21 AM

#627

r0tor

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From: PA

It makes sense as any digital readout needs to take a number and hold it for a second to allow a human to understand it... just depends on the programming how it decides what to display and what not to display with the data changing 10 or more times a second

Just can be a bit scary though...

Mar 21, 2008 | 07:37 AM

#628

Flashwing

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From: Phoenix

I know everyone has been using the accessport to display AFR's. I wanted to remind everyone that the MSD Dashhawk is a product that plugs into your OBD II port and is capable of reading the O2 sensor AFR reading in real time as well as STFT and LTFT.

It can display up to 7 different types of information as well as perform logging capability.

Check it out at www.dashhawk.com

Just as a means of helping everyone out!

Mar 21, 2008 | 07:44 AM

#629

mysql

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From: Florida

should be able to do the same with the scangauge2 (assuming the xcodes are available for o2 and trims) for $170

I had been assuming everyone here had a real wideband.

Mar 21, 2008 | 07:47 AM

#630

Flashwing

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From: Phoenix

For N/A applications the stock wide band should be just fine. Your assumptions for having an aftermarket wide band are no doubt correct for FI people. I'd be scared to have a turbo/SC without one.

Mar 21, 2008 | 08:36 AM

#631

Derex'8

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From: Norfolk, VA

Quote:

Originally Posted by Flashwing

Or you can get the Efidude Prologger dongle and have a true Datalogging ability for only $150, something I'm really considering doing in conjuction w/my AP unit.

Mar 21, 2008 | 08:39 AM

#632

mysql

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From: Florida

or wait for the AP software so you can log from the AP, or wait for them to put logging into the AP firmware so you can log without a computer.

Mar 21, 2008 | 08:47 AM

#633

mysql

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From: Florida

Quote:

Originally Posted by MazdaManiac

Actually, its probably the scaling of your P2 injectors.
The scaling algorythm is not perfect and since your P2s are bigger than those in my car, I had to take an educated guess at the value and scale it slightly rich for safety's sake.

I think you might be right about that. As I go higher into boost the afr gets more and more rich till the engine chokes. So if it's pushing more and more through the 730cc injectors and they're setup too rich, that would be logical. Then I retract everything I said about the greddy MAF housing.

I grabbed my video camera today. Will take a little bit of video tonight on the way home. Stuff like how the car starts up, how it cruises, transition into boost, etc. Let me know if there's any requests. Unfortunately I still haven't found my camera mount, so I'm stuck holding the camera with one hand and steering/shifting with the other.

Mar 21, 2008 | 08:57 AM

#634

Derex'8

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Quote:

Originally Posted by mysql

or wait for the AP software so you can log from the AP, or wait for them to put logging into the AP firmware so you can log without a computer.

Yeah wish they had a timeframe of when they were to release. I hope they release it seperate as this would be really convient for end users who just the wanted the datalogging capability w/out the tuning.

I want both and guess just a lil impatient.

Xcodes??? I can't read afrs w/mine

Last edited by Derex'8; Mar 21, 2008 at 09:01 AM.

Mar 21, 2008 | 09:16 AM

#635

r0tor

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I haven't had time to play with it yet to see if it works on our cars, but there is an open source OBD-II reader/logger that Cobb supports for datalogging if you have an AP and a laptop

http://forums.cobbtuning.com/forums/...ad.php?t=36743

Mar 21, 2008 | 09:35 AM

#636

Derex'8

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Yeah I was goint to give that software a try when my AP arrived, looks like they also updated it but some are still having some issues

Mar 21, 2008 | 10:10 AM

#637

Nemesis8

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From: Missouri

Everyone's basing these findings off the live data screens on the AP, correct? I'm going to do data logging this weekend with my scanalyser. I am not seeing the lean conditions you guys are seeing on the AP, and I don't have the answer why. I'm seeing AFR's around 13 to 12.5 at WOT.

Mar 21, 2008 | 10:13 AM

#638

Astral

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From: Worcester, MA

Quote:

Originally Posted by Nemesis8

Could w0rm be seeing so much lean due to the RB intake & the straight pipe?

Mar 21, 2008 | 10:16 AM

#639

Nemesis8

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From: Missouri

I have the RB REVi, Unorthodox Underdrive Pulleys, RP Supercat, and RB REV8 currently. Next week I'll have the Mazsport ignition and catless midpipe to add to the equation. Maybe then I can make that comparison.

Mar 21, 2008 | 10:16 AM

#640

mysql

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Quote:

Originally Posted by w0rm

From what I've read the ODB2 port really isnt difficult, it's similar to an RS232 port, building a connector shouldnt be very hard and I might even be able to (ab)use the COBB connector. If this is the case we are getting severely ripped off on datalogging hardware as there are plenty of open source software readers out there!

Did you read the AP thread linked above? Cobb released their datalogging source code (ecuExplorer) open source:

http://www.accessecu.com/support/ecu...plorer-src.zip

Mar 21, 2008 | 10:48 AM

#641

Jedi54

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From: The Dark Side

I'm hoping to do some logging on Ngo's car with my scanalyzer this weekend and see what we can come up with.

Jeff: I'll get to work on a dyno day, just let me know what weekends are not good for you in April / Early May.

Mar 21, 2008 | 11:11 AM

#642

MazdaManiac

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From: Under my car

It does seem like the AP display is really laggy.
To tell the truth, I hadn't hardly used it. The software has logging built in, so I use that on my EeePC (or the CarPC).

Mar 21, 2008 | 11:15 AM

#643

jackhain

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From: Lake County, Illinois

Quote:

Originally Posted by MazdaManiac

Actually, now that your trims are stabilizing, you add up the LTFT and STFT and use the calibrations that corrects the result.

If you have a sum that is, say -4, go to the calibration that is 2 values up in the "b" series.

I'm a little bit confused. Here's what I've got...I'm on 1_1b flash right now. My STFT has stabilized and it hovers around zero +/- 2 at idle. My LTFT at idle or coasting (no load) will stay anywhere between 18 and 22. My LTFT under load during accelleration drops to 1 and will stay that way until I let off the gas.

I initially flashed MM's 1_0 map and after a little while my STFT dropped to 0, but my LTFT during acceleration was around 8, IIRC. It seemed to run just fine with 1_0 map, but the trims were a little off. I guess what I'm getting at is...is this normal?? Am I going in the right direction?? Should I quit messing with it?

Mar 21, 2008 | 11:23 AM

#644

OnRails

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Quote:

Originally Posted by jackhain

I thought positive LTFT and STFT numbers meant go up the "a" map scale? Maybe I have been doing it backwards. I started with the 1_0 map at first of course and now am using the 1_2a map since my LTFT at idle ended up around +5. Haven't driven enough on that one yet to see if I need to make another change but it does seem a little rough occasionally at idle at the moment. I'm runing a MS CAI and a midpipe. BTW I've resorted to using my canscan to monitor trims and AFR.

Mar 21, 2008 | 11:30 AM

#645

morkusyambo

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From: Away from the fruits of my labor

This question is for AP owners who are using an aftermarket scan/logging tool and,or a wideband O2 sensor. Are you seeing the A/F ratios you should be seeing??

Mar 21, 2008 | 11:31 AM

#646

jackhain

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From: Lake County, Illinois

Quote:

Originally Posted by OnRails

You could be right. I flashed mine on the way home last night. I figured that 2% wouldn't be a big deal either way, so I gave it a shot. Now my LTFT is looking better, but I have to admit that I don't know precisely what I'm looking for. I'm trying to learn, but I also don't want to damage my car.

Mar 21, 2008 | 11:49 AM

#647

Jedi54

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From: The Dark Side

question: if someone were to get the new flash that Mazda just released, THEN flash with the AP, is it pretty easy to revert back?

Mar 21, 2008 | 12:01 PM

#648

Nemesis8

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Yes - upon installing the AP, the first thing it does is copies the current flash to it's memory in case you ever want to go back to stock.

Mar 21, 2008 | 12:09 PM

#649

MazdaManiac

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From: Under my car

Quote:

Originally Posted by Jedi54

question: if someone were to get the new flash that Mazda just released, THEN flash with the AP, is it pretty easy to revert back?

Yes - uninstall the AP first (otherwise Mazda can't re-flash you!) and then when you re-install, it will save the flash that Mazda put in there.

Clarification -

If your fuel trims are POSITIVE, you go with the "a" series to lower them.
If your trims are NEGATIVE, you use the "b" series to raise them.

Mar 21, 2008 | 12:13 PM

#650

SkyLee

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From: Mukilteo, WA

THanks JEFF for the e-mail!!!