I've been searching these forums for a while and I've still yet to find a solid answer to my questions. What do I need to tune my greddy turbo'd 8 correctly? Do I need a wideband o2 sensor since the factory one is wideband? Do I just need a program like CanScan or http://cgi.ebay.com/Windows-PC-Auter...QQcmdZViewItem to play with the AFR? I'm just wanting to know what all I need to tune this thing correctly with as little $$ as it takes. I was going to have it dyno tuned but I want to make sure I have everything I need to do it right.

Sry if this information is all over the forums, but I'm tired of searching for an answer.

Jamie

 

The shop you take it to should have everything you need to tune it .but it cost money something like 200 an hr were iam at. Its not cheap hope that helps

 

You can get close with the factory wideband, but it is not as accurate as an aftermarket WB like the one the dyno shop will have. If you know what you're doing, try to get it close on your own, then take it to the dyno for some final tweaks.

 

Actually, Mazdamaniac verfied that the stock Wideband was very close to his LM1 wideband for A/F above 11. The canscan does not show A/F below 11 although the WB O2 does measure them. If someone made a device to read directly from the factory wideband, then it should work great for tuning. I know Mazsport was working on it, but they haven't cracked it yet.

 

That's what I plan on doing. I was going to upload some of the maps that are on here to just get an idea of what works and what everyone else is doing, then I'm going to tune them to run at a higher level boost (8 or so). After I get it running alright, I'm going to go pay about $175/hour to dyno tune it. Hopefully it wont take too long if I already get it close. So the dyno shop has the WBo2 that'll hook up to the 8? I wasn't sure what all I needed before I go and tune it....The main problem I'm having is that the E-01 will not control the boost like I think it should. I guess I still haven't got it figured out. Will the dyno guy be able to tune the E-01 to the correct boost? Thanks for all the info.

 

What about the Hymee Scan thing? Does it do that?

 

Yep, we've had the same experiences with sCANalyser... the stock WBO2 sensor and PCM are accurate in the range it reads. The PCM won't give you any readings below about .76 lambda and above about 1.38 lambda - see my graph here:
https://www.rx8club.com/showpost.php...9&postcount=18

There's some interesting tidbits in that thread... if you can wade past the lambda vs AFR debate.

 

The dynoshop will have the WB02 sensor but you will need to have an O2 bung welded in for them to thread into. It needs to be pre-cat in order to get the most accurate readings.
My shop welded it in for $70, then I came in a different day for the dynotune.

I had it tuned back in July on the M-flash and they took out lots of fuel. The difference was night and day. Increased power above 6k rpms. It was running good for about a month, then I noticed a slight powerloss and learned that the stock ecu was gradually changing the fuel trims over time and the emanage couldn't adapt to it. I tried resetting the battery which helped alittle.
After getting the heatshield recall done, the dealership also upgraded me to the R flash; which has made my tuned map worthless and it hasn't been running good at all. Very rich in some areas and noticeable powerloss.

If your still on the M flash, I suggest you upload my map thats around here somewhere (filename: 070705.gsc).

I've given up on the emanage blue and have an Interceptor X on order. Its look to be the solution to bypass the longterm stock ecu fuel adjustments and also it won't be affected by future flashes.

I also had the same problem trying to set the E-01 to increase boost automatically. I believe it's due to the fluctuating peak boost. I'll look into after getting the interceptor X.
The last thing is be careful if your using the E-01 to change the fuel maps on the emanage. Many other members have had their maps get corrupted when using the E-01. I've been using the laptop and support tool.

 

I'm not planning on using the E-01 to tune, only the boost level. I'm going to use the support tool.

I'm now on the 'R' flash, so would it still work or not? Are there any maps that use this flash floating around here?

I dont have a cat , so can I use the one that the stock one goes in?

 

It will run, but it'll be rich. Shortly after the R flash, I got a CEL that keeps popping up "bank1 too rich".
I do not know of any tuned maps that were on a R flash car.

No. The stock one needs to stay in for feedback to the stock computer. They'll weld one into the midpipe.

 

I keep seeing this mentioned but have no idea where this information came from. I have used Canscan several times. It definintely does read below 11:1 unless people mean that it just isn't as accurate in this range. There really isn't any reason to go any lower anyways, not even for forced induction so this is irrelevant. I use the Canscan to look at a/f ratio and then make adjustments in Megasquirt based off of those readings. It works fine. Unfortunately the stock wideband can't be made to work with the MS like aftermarket ones can but the readings through Canscan are very easy to tune off of.

 

please, please, please! get a Innovate LC-1 WB02 and run it to the e-01. I have found that having the AFR reading right there in front of me save me A LOT of worrying! For example, when my car stuttered a little last week, I was able to diagnose it right away as misfires, not detonation, because the AFR was at about 8.5. It turns out that my cold plugs just misfire occasionally before they are warmed-up. Without that info, i'd be freaking out thinking I might be too lean. Having the AFR at my fingertips has also given me the information that the emanage blue works perfectly for me. The AFR is not drifiting over time for my car. Plus, being able to log the AFRs on street runs will be priceless. Its only $150 and wiring it to the e-01 is a snap.

 

Rotary God, why can't the stock wideband be used with the Megasquirt? Are the voltage levels just different from aftermarket ones?

 

Yes, but not everyone has the E-01. That's an extra $450-$500.

 

I have Canscan (version 3.80) and I'm running the Greddy turbo. It bottoms out at 12.05, check this datalog.
When your target AFR is 11.5-12.0, the 12.05 lower limit sucks. I don't know how your getting readings below 11.0, do you have an older software/hardware version?

I have an LC-1 now and I haven't logged both to see if the Canscan is accurate. I'll do that this weekend.

 

where can I get the LC-1 for $150? Since I have the E-01 I guess that'll be the best thing right?

 

I believe the stock unit varies to amperage rather than its voltage in relation to AFR.

 

www.jegs.com P/N 540-3744

 

That is correct; the stock wideband O2 sensor delivers varing current to determing the Lambda value.

All this speak of AFR in :1 speak... The stock system doesn't know anything about 12.0:1 or 11.0:1 or even 14.7:1 for that matter. It only knows about Lambda. And Lambda is not variable like AFR's can be based on the exact stoich value for the fuel.

The "other" product mentioned displays AFR's based on an assumed stoich value. In fact, from our research it uses different stoich values at different places. Perhaps it has changed since.

sCANalyser primarily reports the Lambda value, and the O2 Sensor current reading. With respect, that (lambda) is what experienced tuners should be tuning to. sCANalyser allows the AFR to be displayed as a ratio (i.e. 11.3:1) via a simple calculation, but the user needs to ensure the configurable stoich value is correct for the particular fuel being used for the value to be accurate. That is why Lambda is better. It is invariant.

sco posted the limits of the 02 sensor in the car. It is not a limit of the sCANalysers software - it is reporting the Lambda value as determined by the factory computer / sensor. It's operational range is well within the target lambda values required for full power.

Cheers,
Hymee.

 

Do you have any idea if it is the sensor or the computer that is limiting the O2 sensor's range? If it is the computer, than we should be able to tie in directly to the sensor and read the values there. It is fairly easy to convert current values into voltages.

 

Computer. If you have a look at the graph I posted the straight lines at either end of the graph show that the PCM maps current readings at either end of the range to the same lambda.

If someone has the specs for the stock O2 sensor I might be able to work around that.

 

Since we can read the current values directly (like sco hinted to) then we can get around that if it is a problem I guess.

Cheers,
Hymee.

 

So can we tap into the stock o2 senser's signal and read it through the E-01?

 

I guess the answer to that depends on if having two "things" attached to the signal/sensor affects the signal. Like resistance, impedances etc.

Cheers,
Hymee.

 

PCM software most probably is the limiting factor here.

Fabrice