That's the thing. When I logged back to back today the reported load didn't change like before. I think what Brettus said makes sense. We were just uncovering what the actual load should have been reporting. At least for the loads over 200%. I am trying to sort out what was happening below 200%.

 

That was my bad, I sidetracked you...

 

The reason your max came down below 200 is your elevation . This is what switched on the light for me about how it all worked .
It's hard to believe that something so simple kept us all guessing for so long but that
is often the way of things .

 

So no more elastic ruler voodoo?

 

I had hard time trying top override it and still got no success..this thing sucks.

 

Geee ummm maybe you've posted in the wrong thread?

 

https://www.rx8club.com/series-i-maj...5/#post4460567

So if we move the sensor reading post turbo, but pre throttle body then we can possiably rescale it to account for boost. And still have the origional safety it was designed for.

 

That idea wont work .

The "original safety" can be retained leaving it where it is so long as you understand what you are doing and carefully regulate boost. But you might actually be setting yourself up for an engine failure if you have an accidental overboost.

 

No more elastic ruler , no more edges of bits of paper , no more Einsteinian space ......... Just the plain simple truth .

 

Ok, I know i don't word things in the best manor. They make perfect sense in my head but it doesn't transulte to others the way I intend it to.

I read it and reread it.I think I might understand it also.

There is zero reason why it would not work. The sensor will scale high enough to provide 20PSI of boost. I have tested that much. Now if the PCM will take it is another thing all togther. I guess I can test that also.

I am largely agreeing with you on the idea. Using the additional pressure to multiply the Calc load max was one of my origional intentions with this. I remember asking about adjusting that table before. and You said there was no reason to adjust it.

If all the sensor does is help to protect the cat then it is not worth the trouble of doing.


I Think this is right. It is designed to detect atsmopheric pressure and your engine has an atrifical atsmopheric pressure level which makes the sensor useless.

If the sensor does anything more or other then what you propose then the sensor could be negatively affecting your tune. Of course with enough time and knowledge you can tune around it. Or you can expose it to the artifical pressure and scale the tables to accept it.

Now you do have an advantage of Mazdaedit and the knowledge of any more tables that might use a pressure signal. I will be using ME soon, but I have not decided to buy the personal or the pro. I want to edit table names, but have no other reason to buy pro. So I haven't decided if it's worth the extra money.

 

Sorry for being an *** in my first response to you - I toned it down in my edit .



But ....what good is that . What do you hope to achieve ? Based on what I know about how it interacts with the tune I see no useful purpose .

 

Actually ........................ I just thought of one . You might be able to use it to monitor and log boost !

hmmmmmmmmmm

 

I wore my big girl panties today so it's no big deal.

I was hoping to achieve a higher max calc load when I first thought of it. Second a more stable tune that requires less playing with. I've managed to get my command afr pretty close to actual.

Boost moniter interesting. Does me record baro sensor?

 

getting a stable tune is not hard - once you understand the process.

Yes it does.

 

Tested it . Several issues

* got a CEL - p0108 baro sensor circuit high .

*had the traction lost light come on ??????

*Sensor itself leaks vacuum and probably boost as well

*only goes up to 18.13psi absolute ( 3.5ish psi gauge) before it tops out in the ECU

So ...... no good for a boost gauge ( or what you were proposing).

 

I've realized that NA I can do a lot without worring about it.

 

I just logged 233% and posted in my build thread

https://www.rx8club.com/series-i-maj...7/#post4531898

 

Thank you for giving it a try. That not what I was after but I do appreciate it. I would have tried it when I get there.

I knew about the CEL, but that can be turned off.

The traction light. Probably a fluke.

The leak might be a bad sensor mine just got a few miniutes of vaccume and it's not leaking.

 

Great stuff Slash!

Well , this should cancel out any doubts anyone was having about whether this works in ATR or not .

 

Someone's tag line used to say life begins at 10psi. I get it now!

 

I really hope this opens up possibilities for some seriously quick renesis powered ATR/ME tuned 8s in the near future .
Of course, we still have the issue of how to hold it all together.

 

2'nd gear WOT log posted over in my thread. I did see 15psi flash by on the gauge. Peak calc load was 227.36...

 

So brain fart. Brett, you said Epifan worked it out so ME can go up to 800% calc load. Well, 200% max in ATR x 2.0 Baro x 2.0 IAT = 800%. Is that how he did it?

 

I actually said 800hp which is 400% .He did it by multiplying the max calc load map by 2 . But that was before I learned how we could do it with just the baro sensor. So - kinda redundant now .

 

So my brain fart was bonafide