If E85 is more knock resistant then why would you need to change the knock filters? Are you saying you want to make it more sensitive?

- Bryan

 

What he is saying is that since E-85 is less prone to knock, you can make the knock sensor less sensitive on E-85 and be able to run a bit more timing and / or more boost pressure. Mechanical background noise is a factor on your "raw" knock sensor value, and if you are running a less knock prone fuel you can run with a less sensitive knock sensor thus elimination more of this background noise for less false knock. This is something that was easily adjustable in my AEM EMS on my old car, but is only needed if you are wanting to run on the ragged edge... not needed for the daily commute

Keith

 

I've never had the knock sensor get in the way on a E85 tune. E85 is a fuel you can easily hit MBT with, over and over again, car and car again.

I just don't understand the reasoning of this, but I guess that's just me.

- Bryan

 

Beats me why you would need it... I just know it was available on the AEM EMS and perhaps kozmic27 is used to the same options as I was and this is why he wants it...

Personally since I don't have a dyno to do an exact shoot for MBT on I rely on the stock knock sensor to show me the upper limit and then dial back about 2 deg timing to get closer to where I assume MBT would occur... we all know what assuming gets you though

Keith

PS: Have you had a chance to look at the e-mail I sent you?

 

You cannot rely on the knock sensor on E85 for MBT. With E85 you can hit and exceed MBT with no knock, easily.

Either way, this is going a bit off topic at this point..

- Bryan

 

So if I wanted to flash with tephramodv1 by copying all the gunzo gsr 91oct maps into tephra what exactly do I do with the xml files? It seems tephra inherits map 22 but my gunzo is 18 inheriting 15.

Do I do all the mode23, dtc, fuel trim stuff (from the gunzo thread) to evoxbase.xml, tephramodv1.xml, and 568022.xml ? All three of them? Also I noticed in the tephra thread (evom forum) there are some scalings left out, Do i need to add those scalings to all three xmls as well?


Sorry for the seemingly stupid question but I promise I did look before asking... maybe not hard enough though.


Edit: Also want to mention that I notice there is hardly anything in the 22.xml, am I supposed to make a misc section and post the gunzo dtc, fuel trims, mode 23 info in? Plus there isn't any code in the gunzo mode23 thread for 22. The closest it gets is code for 20.

 

Adding the scaling to base and the other stuff wherever you want will work. I put my scalings in base along with the table defines and then put the specific table items in my 52680022 file. The scalings do not have to be added everywhere.

 

You can just use a <include> statement that points to 20 or 15 (just as 16-20 already do) and label the romid as 22 in that xml. That will carry everything from 15-20 into your 22 ROM.

The answer about what maps to copy is... copy what you want to copy over. Do you want to copy the whole ROM? Then yes... copy every map. If you don't want something, then don't copy it. Seems semi-obvious to me, but I know how things can get confusing when you don't know what you are looking at

 

Thanks Silicon and Fastfyou i noticed that in some other maps and I remember it from my C++ class.

Fastfyou:
Sorry, when I said copy things what I really am referring to are the extra bits of code that one would insert back before tephra came out. So really I'm talking about work 100 percent outside of ecuflash.

I have since been told by golden that there is no need to do any of the things I've been stressing about, that they are included in tephra mod. I guess I was trying to combine the old with the new but tephra already did this.

 

Wow - this looks pretty awesome....just stumbled across this while i was having some issues w/ my Stage 2 AP....time to read 27 pages of this thread...

 

But isn't that his point, that he IS seeing knock counts because of the noisy engine, when he shouldn't be because E85 is basically knock free <MBT
and when the engine sees false knock then timing gets pulled, power gets pulled.. it all turns to **** just because of some extra 20PSI of boost flowing past the wind pipes so he wants to change the ALT knock multiplier.

 

Nope hes saying he wants it less sensitive. so that you don't see false knock. I can see the benefits in having such an alt value.

Actually it kinda seems like we should be tuning our knock frequency multipliers and knock tables as much as the fuel/timing maps lol

not all of us have the benefit of perfectly engineered engine builds that purr like a sleeping cat

 

For those who are familiar with Altmaps,

When the maps switch automatically (such as failsafe triggers the safe map) are you given any kind of visual confirmation? Does the intercooler spray light stop blinking?

I'm trying to verify if my failsafe is actually triggering the safe map.

 

Correct, the light should stop blinking.

 

yes - regardless of what altmap mode you are on (ADC, cruise, tps, etc) when the light is flashing you are on altmaps.

when it's not flashing you are on normal maps