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Discussion starter · #201 ·
For those of you that are using the switchable maps for different fuels, are you just changing the fuel scalar stoich to let's say 12.95 for E30 as opposed to 14.08 for E10?

Does changing the scalar point automatically then scale your AFR targets?
 
For those of you that are using the switchable maps for different fuels, are you just changing the fuel scalar stoich to let's say 12.95 for E30 as opposed to 14.08 for E10?

Does changing the scalar point automatically then scale your AFR targets?
Yes. I use lambda though, but "same thing" if you can do lambda to AFR on gasoline scale conversions in your head and vice versa.
 
Discussion starter · #203 ·
Ah okay. Yeah I'm asking cause I'm thinking if I dump a couple gallons of E in the tank can I just change the scalar point as a start to the tuning process
 
Ah okay. Yeah I'm asking cause I'm thinking if I dump a couple gallons of E in the tank can I just change the scalar point as a start to the tuning process
Yep. I use it for the opposite. If I can't get e85, I have a slot for 93 lol.
 
Discussion starter · #205 ·
Even with the scalar set for E30, shouldn't we be rich ending up the target? Most people run close to .85 lambda on E10 pump gas but doesn't the target for power change on E30? I'm not sure what the optimum power AFR is on an E30 mix. But I'm assuming it's much richer than 12.0 on a gas scaled wideband.
 
You can adjust your target fuel on each slot.
 
Even with the scalar set for E30, shouldn't we be rich ending up the target? Most people run close to .85 lambda on E10 pump gas but doesn't the target for power change on E30? I'm not sure what the optimum power AFR is on an E30 mix. But I'm assuming it's much richer than 12.0 on a gas scaled wideband.
11.5 is what I shoot for on e30
 
Even with the scalar set for E30, shouldn't we be rich ending up the target? Most people run close to .85 lambda on E10 pump gas but doesn't the target for power change on E30? I'm not sure what the optimum power AFR is on an E30 mix. But I'm assuming it's much richer than 12.0 on a gas scaled wideband.


FUELS DATA
 
Discussion starter · #210 ·
Yeah I'm not gonna try to fool with it now. I'm just wondering for the future. I'll have to sit down and actually figure it out haha.
 
Don't worry about it too much. I'd keep the targets similar to how you would for 91/93 to start off.

Get the timing down for E30, and then try switching the power demand target around.

I say don't worry too much, because I didn't notice too much of a difference between E30 and 91 on this engine as far as the stereotypical rich best-torque curve. The AFR to Power curve seems to be much flatter, probably due to direct injection changing combustion properties from port injection. I believe Alex@Stratified had talked about this as well somewhere, saying he too didn't notice as much of an effect.

The main effect I've noticed on power from it is the timing differences you can get, not so much that different AFR with the same timing does much of anything.
 
Discussion starter · #213 ·
What I need to do is actually get my ass in gear and dial in my 93 tune first. Being out of commission for 5-6 weeks with a broken foot means my ass was slacking.
 
Discussion starter · #214 ·
Okay I know it's been a few months since I've updated here... But I feel its time for an update now that the weather is beginning to break!

Over the winter, I've added Stoptech slotted rotors, Hawk HPS pads and Stoptech braided lines to the car.

I've also just recently started working on the tune so far. Under advice from @Gh0st and @Bugasu, I've reverted my timing HDFX tables back to the Cobb OTS stage 3 tables and am using the 3D Timing table in the switchable maps to dial in timing.

I've got the RPM scaled from 2k-7k and load scaled from 1.0-3.0

I've done a bunch of driving, I want to focus on the midrange and mid-load range first. I'm REALLY surprised how much timing can be added over the base tables. I'm pretty sure I'll get to MBT in a lot of these areas and honestly I can't figure out why it wouldn't be programmed to run MBT in all these areas to begin with because under light boost there there's barely any knock. I'm expecting, once its dialed in, for fuel mileage to increase a bit. Any time you can make more power, you probably need less revs and less airflow and fuel to do it. So we'll see what happens with that. It will probably be marginal.

I'm also thinking that once temps go up and the summer blend fuel comes out that I might find even more timing in that range? Not sure. I haven't been doing any WOT spark tuning yet though over the COBB OTS Stage 3 tables, mostly because the summer fuel isn't out yet anyway.
 
Discussion starter · #215 ·
PROGRESS IS FINALLY BEING MADE!!!!

Okay so the summer fuel is out here as of June 1 but we had some really steady days of rain and whatnot but I finally got a change do to some tweaking to my toonz. LOL

Here's where I was at with my 93 octane Shell V-Power Tune. I felt pretty happy with it.
datazap.me | BoostedStig | WOT 6-22-15

Now, as of today, I used that timing as a base to start my E30 tune. I basically just copy/pasted the 3D timing table from my switchable map slot for 93 into a new map slot for E30, added 3 degrees to everything in that table, and then just adjusted scalar stoich to reflect E30.

Did a pull. 3rd gear.
datazap.me | BoostedStig | WOT 6-22-15 E30

This is where I'm at right now. Not bad for both days being in the low-mid 80's with considerably high humidity. (Welcome to Chicago summer) I've added a bit more timing and will run it again tomorrow.

Let me know what you all think.
 
Does anyone know if the Fuel Level Input % monitor is accurate on the AP? Accurate as far as figuring how many gallons of space you have when calculating for an e blend fill up?

@Gh0st
@Bugasu@Stratified
Its a direct reading from the sensor used for the gauge in the cluster, so its the most accurate thing you got ;) So if you're on level ground, I think it'll be sufficient enough to get a good consistent blend.
 
Discussion starter · #218 ·
Its a direct reading from the sensor used for the gauge in the cluster, so its the most accurate thing you got ;) So if you're on level ground, I think it'll be sufficient enough to get a good consistent blend.
And we're still assuming 12.4 gallons as being 100% then right?
 
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