3.0L H6 on E85 = WINNING

[3rspecb]

The later model koenigseggs use a flex fuel sensor.

Interesting and good stuff for nutting it out.

In regards to GM, we have been using flex fuel sensors (globally) for a number of years now, not something recent

[dlee]

very interesting

[kroma11]

Seems like there is a huge amount you can tune / program these modern day ECUs compared to what was around 20 years ago!!! Obviously there will be progression but still.... 27 safety routines to check stuff? Wow!!! Wish I could program my Nissan ECU like this lol.

[KiDo_Tuning]

Seems like there is a huge amount you can tune / program these modern day ECUs compared to what was around 20 years ago!!! Obviously there will be progression but still.... 27 safety routines to check stuff? Wow!!! Wish I could program my Nissan ECU like this lol.

I tune my Nissan ECU's with similar stuff Was running a VQ35DE with an R34 NEO ECU with a daughterboard which could be tuned live, had 18 different maps(LC, FFS, 15 maps for different levels of ethanol from E85 to 98 tune, plus a valet map which stops the cams from coming on and rev limiter at 4000rpm)

Learning View today showed an 07 5EAT H6 D2UH001T ECU has an IAM of 2.000 on E85 and then added half a tank of 98 mixed in, came down to 1.45(20 steps have 0.05 drop per step) when checked 3 minutes later

[kroma11]

That sounds like a fair bit more than what Nistune is capable of, on my SR20 ECU at least. Either way, I've just sold it and am building a MegaSquirt which has flex fuel built in so can't wait to try that out!

I'm assuming IAM has something to do with the flex fuel sensor and ethanol content?

Has there been any progress with the E85 setups in the last few weeks? I'm very interested in this for when I get my H6 tuned, if it's refined enough by that stage

[KiDo_Tuning]

Dyno this Tuesday with a stock as a rock 09 5EAT H6 running E85, dilute it to E70 and then on to pump fuel to compare the differences along with reloading the stock tune as well

Road testing says that 13.2 AFR's(or 0.9 Lambda) on E85 makes the EZ30 sing the song of my people!

[kroma11]

Sounds like good progess!!

Correct me if I'm wrong; isn't E85 stoich around 9.7? Does this mean you're able to run the EZ30 super lean on E85? Meaning more power while still maintaining decent fuel economy?

[KiDo_Tuning]

Sounds like good progess!!

Correct me if I'm wrong; isn't E85 stoich around 9.7? Does this mean you're able to run the EZ30 super lean on E85? Meaning more power while still maintaining decent fuel economy?

Should clarify better, the WB is still in petrol scaling so 8.8 Air:E85 ratio or 0.9 lambda on full power and stoich on cruise. Cam timing induces EGR which improves fuel economy as your not filling the chamber with a full charge of fresh air thus less inj pulse

[kroma11]

Ah of course, didn't think of that! Based on those AFRs, do you have any approximate numbers yet on KM/tank on E85 and power output with a KiDo tune?
I guess the best thing is that you can switch between E85 and regular 98RON on the fly!

So are the E85 tunes still in an experimental phase or are they already being rolled out to customers?

[Surge]

Seriously considering this.
I would like to know where we should source the new fuel pump?
And if you could recommend one for my liberty.

It should be a simple job to install it right?

I just took my stock car to the rexnet ultimate tunes dyno day, made 68kw atw.
How much would be expected from an e85 tune?

Lastly is it possible to get a ballpark figure for the tune?

[3rspecb]

You might not get your desired answers posting in the 3.0H6 section.

Search the 2.5i n/a section. Numerous threads on kido tune and westminst tuned cars, mods and their outcomes. There is even a few posts from members who went down the raptor s/c path.

[dr20t]

The logic in the 02 sensors differ between the years though, don't they Matt? Scaling is different on different ecu's

So this wouldn't be possible for the prefacelift GT lib would it? For two reasons - one being cal memory (512kb) and two being the dual 02 sensor / lamda sensor setup in the dump?

What I'm not getting is how the rom can be changed without a physical reflash/ map change? For recoding doesnt the ecu need to be in write mode with the two green connectors plugged in?

Pretty freaky that a few coded sequences can flick maps across that change OL fueling, maf scaling, ve tables and timing

If this is correct jump on it people

[KiDo_Tuning]

The logic in the 02 sensors differ between the years though, don't they Matt? Scaling is different on different ecu's

So this wouldn't be possible for the prefacelift GT lib would it? For two reasons - one being cal memory (512kb) and two being the dual 02 sensor / lamda sensor setup in the dump?

What I'm not getting is how the rom can be changed without a physical reflash/ map change? For recoding doesnt the ecu need to be in write mode with the two green connectors plugged in?

Pretty freaky that a few coded sequences can flick maps across that change OL fueling, maf scaling, ve tables and timing

If this is correct jump on it people

Primary OL fuel table is a multiplier on the MAF scaling to get a desired injector pulse. So target 10.88:1 AFR in OL fuel table which is 30% more fuel than stoich. and say your at 200g/sec maf airflow with 10.88:1, then the ecu pumps in the equivalent fuel pulse as what you would for 260g/sec at stoich(not that you would want that!)
So, the E85 map has a seconday OL fuel table that multiplies the figure again. So to add 30% fuel everywhere, the whole E85 additive table would be 10.88 or if you looked at the raw ECU table, the value would be 1.3 as a multiplier. So I use an IAM of 2.00 to define E85 mode and add fuel, then have a High KCA timing value additive that adds timing on top of KCA.

Heater element is the key although I am adding coding when I get home to adapt a Haltech Flex Fuel sensor into a spare ECI input if I can find time

[KiDo_Tuning]

Ah of course, didn't think of that! Based on those AFRs, do you have any approximate numbers yet on KM/tank on E85 and power output with a KiDo tune?
I guess the best thing is that you can switch between E85 and regular 98RON on the fly!

So are the E85 tunes still in an experimental phase or are they already being rolled out to customers?

Nearly 18 months of develipment/testing for turbo cars, getting the NA tuning spot on has been difficult due to lack of tume

Expect late August for H6's to be sorted and fully functional

[dr20t]

Primary OL fuel table is a multiplier on the MAF scaling to get a desired injector pulse. So target 10.88:1 AFR in OL fuel table which is 30% more fuel than stoich. and say your at 200g/sec maf airflow with 10.88:1, then the ecu pumps in the equivalent fuel pulse as what you would for 260g/sec at stoich(not that you would want that!)
So, the E85 map has a seconday OL fuel table that multiplies the figure again. So to add 30% fuel everywhere, the whole E85 additive table would be 10.88 or if you looked at the raw ECU table, the value would be 1.3 as a multiplier. So I use an IAM of 2.00 to define E85 mode and add fuel, then have a High KCA timing value additive that adds timing on top of KCA.

Heater element is the key although I am adding coding when I get home to adapt a Haltech Flex Fuel sensor into a spare ECI input if I can find time

That's friggen cluey but simple !

What happens in closed loop though, where you're targeting stoich? You can't simply increase maf output for corresponding voltage by 30% in sub 80g/s ranges could you?

By multiplying injector pulsewidth how do you then compensate for hysterisis on tip in and other deccel characteristics though? Does it switch to another mode or are you assuming voltage drops and thereby increases dead time?

Also, how do you then account for knock control strategy then, if your Iam is increased to 2.0 based on kca advance being manipulated. What happens if ecu goes into rough correction when you switch maps back to 98? Will it not be targeting iam of 2.0 again and thus constantly using kca to try (unsuccesfully) to get there ?