Brettus

iTrader: (2)

Excellent

FazdaRX_8

iTrader: (1)

so the next question is, did you log this?
did the log stop at 5v?
what is your max maf voltage set at on your maf scale?

because of what happened to me I am thinking the ECU can see past the 5volts just fine....

logalinipoo

My logs are not downloading right for some reason. I just reinstalled ATR so hopefully that will solve the problem. I'll try it tomorrow.

Since the cobb showed a max of 5 I would be really suprised if it would log higher.
My MAF scale is stock. 4.69 at 365 g/sec

slash128

Since your log showed g/s off the chart, but logalinipoo sees the Cobb voltage max out at 5V, maybe the ECU can read higher but not the Cobb. This might not be a show stopper. As long as the ECU sees the higher voltage and calculates the correct g/s then this can still work.

logalinipoo, can you run the same tests and see what the Cobb shows for g/s even when it doesn't read higher than 5V? Or did you already do this?

logalinipoo

Good Idea, I'll get it done. But It might be an arbitrary number not an actual calculated number.

Even with the MAF sensor disconnected the Cobb stlll shows g/sec.

Also I thought about it some more and when you rescale your MAF if your g/sec is lower then actual you are going lean and it's going to be very risky. I would start out with a High g/sec and work my way down to keep it rich.

slash128

This seems odd. Is it a static or dynamic value? If static it could just be some artifact of the ECU defaulting to a value with the sensor disconnected.

logalinipoo

It changes with pedal position.

slash128

Hmm so I wonder if it has a default scale based on TPS when the sensor is disconnected. Any chance you can report the values?

Thanks for your help!

FazdaRX_8

iTrader: (1)

you know I think brettus mentioned a second maf sensor scale in ME.......

Brettus

iTrader: (2)

Wasn' me !

logalinipoo

I'll have to try it again and see if my cobb is logging right now. I just ordered the MAF extension cable that 9k pointed out so I'll see if it is right or not. I'm waiting on parts now for the Voltage Divider.

I contacted auto wiring solutions that do the ignition wires for sale on ebay and they do not have the denso connectors.

logalinipoo

Well I tried this again and the engine would not stay running. When it died the cobb would show 0g/sec even though I was showing up to 5 Volts on the cobb.

logalinipoo

Well I figured out the accessport does not like usb 3.0. Now I have some good logs.

This is with my max calc load table set to 2 and my bario and IAT set to stock. The MAF sensor is disconected.

wcs

iTrader: (2)

I'm confused.
What's the point again?

TeamRX8

iTrader: (25)

you could at least edit out out all the pointless data from your log first

logalinipoo

Team, I'm guessing you mean the time at 0 throttle. If not then what else? I didn't realize there was that much in there.

slash128

Hi logalinipoo, have you had a chance to verify what g/s shows up when exceeding 5V on the MAF? Does it really drop to zero? I still plan to swap my injectors this weekend, but very Leary of attempting any more logs if g/s falls to zero after exceeding 5V. In my 2'nd gear 15psi log I hit 4.98V. Not a whole lot of cushion before certain death. I would test myself, but I am still out of town. Thanks!

slash128

Does anyone have an MBC they would recommend for a temporary test scenario? I am looking around but if anyone has a quick suggestion I think I might order one just so I can back off from the brink a tad...

logalinipoo

Well it logged 0g/sec for the whole test.

It will not show g/sec if the engine is not running, and the engine won't stay running to do the test.

MazdaEdit and cobb will not allow you to raise the MAF scale above 5 Volts so I personally would not go over 5 Volts. 4.98 is closer then I would try.

On the plus side. It appears that the MAF is just a variable voltage divider itself and I am feeling really confident that it will work. Just let me get the parts in and Ill confirm it for you. I'll even send you one with directions. Although It would be nice to have someone else confirm the max voltage out they get. Since mine was 5.63(every MAF may e diffferent)

slash128

Gotcha, thanks for letting me know. Appreciate your help!

yomomspimp06

slash, just order an EBC. There is probably profec spec b around. They go for rather cheap used.

slash128

Ok I will look around...

FazdaRX_8

iTrader: (1)

I got mine on CS after a guy blew up his DSM using it lol

Brettus

iTrader: (2)

Sounds like a 10% voltage reduction will do the trick . Should take us to 400whp no problem.

logalinipoo

I'd say at least. I'm working on a recalculated baseline MAF scale now. Now if we can just keep an engine togther at those levels.