At what temperatures?

 

RAX Patch for 58020005 (2012 Evolution SST) is now available.

Thanks to khaydin for field testing it.

Rich

 

Just as an update, up here at 6000 ft altitude, air temperature makes much more of a difference in the air's density than at sea level. So much so that I had to significantly alter the left column to get the same boost curve/pressure at different temps.

I have it set up like this

0 -5.0
30 -3.0
50 0
61 0.5
70 1.0
81 1.5
90 3.0

Above 90* F IAT, then the density doesnt change to much.

at 0* I set it really low because I highly doubt I will be going out and driving the **** out of my car at 0*.

 

A buddy of mine who lives up @ 5500' and frequently comes down was having the typical issues, so I looked into this patch for his car, and noticed that my rom id now tested... So I decided to give it a shot, and all seems to be well!
Now for the real test, since Im always at sea level... Im gonna try to get this patch on his car and see how it does for him...
Nice work Rich!

 

Cool. As always, if anyone can confirm a previously "Untested" ROM version, drop me a quick note. I'll update the testing results table with your name.

Cheers,

Rich

 

I want this for my 2011gsr but I have a 013 rom id. :-(

Short of possibly bricking ecu is there anyway to test it on my rom? I'm not setup now to bench flash

 

At the time I'm writing this, Golden's site doesn't have "Direct (PSI-based) Boost Control" patches defined for 0013... which is one of the things required for RAX Patch "Atmospheric Boost Baro Compensation". So 0013 is generally a wee bit behind 56890010.

I think most people have just flashed 56890010 - it's safe to do that. As long as the first 4 digits match, it's no issue.

However, 0013 defs are 99% of the way there, so I reckon we just push it the remaining distance. I'll get Direct PSI-based Boost Control and RAX Patch done for you.



Rich

 

When I get those both of you are getting money ... I'm having such a difficult time tuning in my 3port with the temp swings here lol ...

Good to know about the backwards compatibility I kinda figured they were ( to an extent) but I'm too new to the evo ecu to be getting adventurous.

 

56890013 RAX Patch is all done. Download link is on first post. Let me know how it goes.

Also, goldenevo.com now has a "Direct Boost" section. Those aren't like my RAX "flip-on, flip-off" patches... they are bit more basic. You have to enter new hex values (ie. with "0x" prefix. If you're new to Evo ECU tweaking, that could give you stress headaches. Feel free to pm me if you have issues or want a sanity-check of your ROM before you flash it.

Rich

 

Ran into the A1:scale/table data has (no match) in it as well.. Sent you the map and definitions I'm using .. As well as a donation


For 56890013 btw

and he fixed my problem (which was me) enable the patch then change values i did it the other way around which is no good

 

Hey Rich I have a silly question. On the boost base for the evoscan logging its a different value than what I see under the barometer value. So I guess my question is should one or the other be changed to the other??
The eval in the Baro sensor logging is x*0.071763464

and your base boost logging eval is x*0.19347.

I am just curious because it logs and shows what boost the sensor is running coming from the BARO so is the car running different boost than its showing??

 

For some background...

The way it works inside RAX Patch is as follows:

- Patch grabs the Baro value.
- Patch rescales it so it is in line with the scalings used for Boost Target value.
- Instead of adding a constant value (ie. "Atmospheric Boost" to the Boost Target, patch adds the rescaled Baro value.


So if you're logging "Baro" and "RAX Patch Baro", there are only two reasons why they'd come up real different. First, the patch might not be working (like THAT's possible, lol). Second, the scalings you're using are the cause of the difference.

Note that there are several different "Baro" (and "Boost") scalings floating about. On Golden's site, he has:

x*0.074742268

I tend to use:

x*0.07251887

You're using:

x*0.071763464


Pick a number!

I can't recall the exact source of my own preference, but it seems to correlate pretty well to the real world. When I use Golden's scale, I get barometric pressure readings of 15.1psi... and I'm not below sea level. So I'm happy enough with mine, which reads 14.6-14.7 on the coastal plain where I live.

Your "Baro" reading looks low, right?


Hope this helps...

Rich

 

My Baro values makes my car read exact to current Barometric values. I've tested it on other cars in other parts of the country. I look up the exact Barometric values at the time of the log and they always match. You don't have to be below sea level to get higher than 14.5 psi. Ever heard of high and low pressure zones on the weather channel? :-)

 

Yeah, it's a mystery. I seem to recall mine saying 15.2 psi on a perfectly fine day, with a giant "H" over my side of Oz.

You can bet I'll get OCD about this one day.

Rich

 

http://www.evoxforums.com/forums/showthread.php?t=33319

Lol this is where I got my scaling from. I guess it is a tiny bit low I am at about 4400 ft and showing about 12.35 and this site says it should be closer to 12.5 something.
http://www.engineeringtoolbox.com/ai...ure-d_462.html

So I guess I could rescale it to one of the other ones and see what its reading.
Btw the patch is doing great.