dammit, Now I have to go and open up mine too!!!
your making me wish I didn't sale my W/M kit

I wonder if your added power could also be that you are now providing more fuel too. IE running richer then 11.2 is more power

 

So now W/M should be used!? Or is it someone (brettus) figured out how to tune with it?

 

Well - there is a lot going on .

Firstly the VDI thing - I was experimenting the other day with opening the vdi at the same time as the SSV (don't ask why) and noticed a bit of extra power up top than i was used to seeing , so thought i would switch it back on .

Secondly - the water/meth

Thirdly - bit more timing

Fourth - bit less fuel

Fifth - more boost lower in range


So all up ............ I dunno where the extra power came from ................LOL

 

I think it's a case of using it once you go past a certain level of boost . Most guys in the past have fitted it and only ran 10 psi in which case it just saps power .
Only reason I fitted it was because I was noticing an increased tendency to ping at 15psi with AFRs that were still quite rich.

 

so you hit 5v on the MAF. I'm assuming it just extrapolates...
you're scaring me brett. experimenting with no wideband...ekkk

 

so now your car depends on W/M
congrats brett, seems you reached your 400whp goal!!!

 

How do you mean ?

Still have the stock sensor ... showing a flat line . So I still know it isn't getting lean .

 

Well - i don't have it tuned to be dependent on W/M ................... Yet . I want to make a safety circuit that dumps boost if there is no water pressure . Just need a pressure switch that works with water .

Then I would feel safe to tune it to be dependent.

Thanks
Goal is 350 and that is where I think it is about at in reality.

 

So you are saying/thinking anything greater than 1 bar use W/M? I'm running 10-12 psi depending where I am in the RPM range. What do you think?

 

Somewhere around there yes . At 10-12 i wouldn't bother with it , just get your AFRs in the high 10s and you are good . I'm not even switching my W/M on till 12 psi .

 

did you go past tthe 5v max is what I should have asked.

 

check out the mazdaedit thread,

he hit 5volts but his g/s read slightly lower then what was called for at that point.
although the image doesn't go past 4800rpms the maf must have stayed around the 400g/s or even declined because like brettus said he is peaking boost then it tapers down.

he would have to increase the boost a few more psi to see what happens behyond the measurable airflow of the maf

 

Hard to say if I flowed enough to go much past 5v but the fact that it was exactly 5.00V and not 5.01 or something like that should be an indicator that 5 is the max. the ECU will input.

 

If I had hit 400g/s at 4800rpm I think I would have spun the earth off it's axis ...... log was vs time not RPM .





True - but I would bet that we will just see 5V and the ECU will dispense the fuel based on whatever load that produces at that rpm.

 

I agree. I think it will stay at 5volts too, but based on a log I have, I beleive the G/S value will continue to increase with rpm. at the same trend/rate as if it was going to 6volts.

 

isn't the trend broken down into sections? Any way it goes, I think it's time to look for a larger maf Brett.

 

that would be a neat trick .................

 

Nice work Brett, you removed some fuel also?? I still haven't got my potiemeter's so I bought one today and did some playing. The funny thing Is my Duralast MAF, I just replaced, only puts out a max of 5 Volts when measured with a volt meter. My previous MAF was going as high as 5.6 Volts. At 5.6 Volts My cobb only saw 5 Volts. My fuel trims did not change with teh change of the MAF sensor.

With the MAF unpluged the car will still show g/sec. With the stock Max calc load the car drove okay. With the Max calc load or the Max bario load tables raised it would show some really high g/sec numbers and have rich missfires. That is on the ACdelco D 585 coils with the Dwell just about maxed out.

I'm thinking the Car will go to a calculated g/sec after you cross 5 volts. If your max calc load is set close to reality it will probably give a good number and fuel corectly. If your max calc tables are set high then It is going to calc g/sec high and overfuel. If it's low then boom.

 

So ...................... go back to the stock maf !




This sit nicely with the theory I have about what the max. calc. load table does . IE manages fueling if there is a fault . Which protects the Cat.



I think it will just sit at whatever number you set for 5V and max calc load map will do nothing so long as you have it set so it can't interfere.

 

I traded it in for the duralast. I'll just try swaping it out later. The Voltage divider does work, but it's useless if your MAF doesn't go over 5 volts.





I'm thinking it sees 5V as a fault.

 

Were you able to get an AP readout of g/s when you were maxing out the maf with compressed air ?

 

No it reads 0 g/sec

 

oh that's right . that's why everyone thought the wormhole would open up .


So lemme get this straight ...... you applied air down the hole and gradually were able to see g/s rise as per the maf table until it got to 5v when it suddenly dropped to 0g/s ?

 

Tofu just found this :

AEM Water Methanol FAILSAFE Device 1/4" SAE


looks like a great idea !

 

No there were no g/sec at all when the car is not running.

Here's the log. Around 480 and 590 you can see max voltages with the divider on. I built in an on off switch so I could switch between stock and the divider.

The whole log shows me varing the voltage to get Idle volts down to zero and back to standard 0.7

Also I don't have winzip and my trial is up. So this file is actually a .XLSM file. Just change the .ZIP to .XLSM and it will open in excell.