Jump to content
SAU Community

Recommended Posts

the scalar is interesting.. at 80~90% of ethanol registered it should be 100% of the compensation table, yet you tuna has used 133%

Meaning it would be your base tables + 1.3x of the compensation table applied on top for fuel.

Hopefully the timing table isn't like that, because well... it's an interesting way to tune.

Also 44% more fuel is massive, 133% of 44% more fuel is obscene. The numbers just look... wrong?


The stoich values of 98 and E85 are too different surely for both the 98 tune and E85 tune to be right at the higher end of that scale. Either the 98 base tune is dangerously, dangerously lean, or the E85 is horrifically rich.

Now keep in mind, if you have the O2 sensor running and the controller doing its thing, it is possible for these correction maps to be really far out, and the O2 controller will do what it can to adjust. This may be the reason the car has bad E85 economy if it cannot actually trim enough up top. What is your AFR under load on E85 anyhow, what does the Haltech say/does it show in the onboard logs?

Not sure without going doing specific diagnostic runs.

I've got a mate coming over tomorrow who will want to go for a spin so can take the laptop and upload a trace then.

That said i think we established that my economy was about the same as others here.

I have a trace from winton but the car had a phat boost leak.

Just spoke to another local tuner and showed him those snaps and he said the same thing about it being unusual but could be fine depending on the rest of the setup.

He's happy to have a look at my log after I get one.

Will go from there.

It's interesting to say at the very least, I personally don't tune like that.

I'll provide screen shots of a S15 I did about 2 months ago with a halaltech when I'm home.  I personally did not follow the same approach as your tuna.

  • Like 1

They call me the postman, because I always deliver...

https://expirebox.com/download/a700385dce0e228b3426cb2b28ae741a.html

Diagnostic csv from a quick run down the highway and back today.

Only 2MB, file expires in 48hrs. 

"Yeah I floored it and it was like 9 or 10 or something around full boost, or there abouts, yeah between around 4 and 5k rpm" 

Would have been heaps accurate and a great way to do some logging lol you muppet

Then you'd be the first person jumping on to say "You should have logged it properly." 

You must be a blast at parties lol

What you do care about besides being salty all over SAU lol 

I'm confused, why did you and are you still posting in this thread anyway? 

It's cool if you like me dude, we can take it to PM ;) 


 

 






 

 

Help? Do you mean asking your thoughts about your Evo? Or talking -9s and response etc? Not sure if I count opinions as "help", but then again you are helping by answering and giving me your thoughts so I guess that's a fair point of view from a certain perspective - if that's what you mean. Come to think of it, you're actually probably more "helpful" and generally less salty in PM. 

I like this sort of "help" you provide lol Took about 2minutes and that was only going back through a handful of my own threads and lately. Keep up that helpfulness :D

3.JPG.46928b1c113209be6498bb9b76213992.JPG4.JPG.812c7c3042e17788f4a017b2034049d1.JPGCapture.JPG.3298279ac7dfc783944aadd17364022e.JPGCapture2.JPG.3dfdffa4d5dd4cda41139e6eda8c2a84.JPG


So yeah, I guess maybe that's the way "I" wanna be and nothing to do with you at all lol

Ah well, we'll always have Paris xox

Other than the curvature of the earth, they are kind of all valid points :P

But yes O2 gauge is kind of needed, everything else seems "fine"

If you wanted to get real creative you could measure your VSS against time, to see if you were really slower between two specific points/runs. This however would require the problem to be reproducable at will. Or at least happen while you are logging it.


Note: I didn't see the boost actually hit the limit of what the ECU is seeing at all. MAP pressure was all 21.5ish points, when it goes over the limit it will just flatline at 22.8 or w/e it is. The graphs do not show this.

  • Like 1

Given the context of those comments, not really ;)

Dyno will fix all with new map sensor and cams, then all of this will be a distant memory (also closed loop boost unless there's something I'm missing about wy you'd want to be open loop?). 

Still doesn't explain why every comment seems to imply the fuel tables are "odd".

 

They look "odd" because E85 typically needs "30%" (give or take) more fuel than 98. In the real world its actually a little less.

They also need 30%, all over the rev range. It does differ a little under load (otherwise it would be 30 in every cell!) but not from 19 to 43%.

Yours goes from 19% under low load, to 43% under full load.
In addition to that,  your tables imply that you add 133% of the correction when you have 80% ethanol in the tank.

This would mean it would be 133% of 43%.

20% is too little and your E85 would be dangerously lean.
43% is too much and this means either your E85 map is fine (and your 98 is too lean) or your E85 is too rich.

Note: The above numbers are when 100% of the correction is being applied to a decent base map.
However.... yours is 133% of the numbers applied!.

133% of the correction being applied means that everything is 'out' even further'. The numbers are impossible numbers, it can't be correct, unless something is making it be correct, which is what the O2 WB does, it adds and removes fuel to try and hit the target on the "Target AFR" map, which is basically closed loop fuel control. The Target AFR map doesn't appear to be too bad as it's looking for 12:1 AFR under full load.

It is common/advised practice to have the base map as accurate as possible, and not have an O2 controller have a monstous effect, though the Haltech lets it apply up to 25% more or 25% less fuel if need be. If this fails for any reason you are going to have a bad time if it is set up this way.

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • For fuelling the Haltechs have O2WB fuel controllers. Very useful for helping tuning VE and correcting for *small* mistakes. Of course if your injector/cam/trigger/sensor data is just wrong (or for a GTT which is not a GT) then you will get impossible reactions to things. I am sure you know this already but the reason people don't typically put haltechs (or any Aftermarket ECU) on GT's is because there's practically no real gains to be had - So this knowledge won't be commonplace.
    • Can someone tell me if the cracks seen in the rear sway bar bushings in these photo's is unacceptable from a roadworthy point of view?  
    • Shouldn't need a "base map" for anything other than guidance to ignition tuning. You just need the engine capacity right, the injector size right, and something, almost anything, for a VE map. On an NA engine, fuelling is almost completely a function of load signal & rpm. It should run and drive with a completely flat fuel map. It will be too lean under load, but that's easily fixed. We used to tune all ECUs without any base map. There were no such things (until someone had tuned a near stock engine on one, and then they had a "base map".
    • What did you actually buy/how much did it cost? When I got mine in like.. 2017...? 2019? the aim was to run Torque for gauges via ODB2 and things like Track Addict/Laptimers/Dashcam/Reversecam/Spotify etc. Mine never broke, but I wonder if you've got the same needs (it sounds like it). Cause I liked the idea of being able to do anything with it. That said, yours also cost 3x the cost of what I spent so... food for thought.  
    • For me there is a massive difference in manufacturer or big brand crippled android (Sony, Kenwood etc) vs the sort of thing I've installed here, which is basically just a tablet in DIN form factor with open Android, and the other model of course is mirroring - Android Auto/Carplay. I hate the locked down manufacturer and AA options where they decide what apps I'm allowed to install, including the Launcher but also importantly things like Ecutek (for this car) or Real Dash (Stagea) are not supported. Plus those crippled versions tend to be slower due to both overheads and lower spec hardware. On the other hand, when this breaks I'll likely be in trouble for support....but how is that different to owning an Infiniti anyway
×
×
  • Create New...