The Maestro Community E85 Project

[StatusQuo]

Thread moved here: http://www.audizine.com/forum/showth...munity-Project

[aluthman]

I no longer have access to Maestro, but I will answer any questions I can.

[StatusQuo]

I no longer have access to Maestro, but I will answer any questions I can.

thanks man. Good to see you on the thread!



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Also if anyone thinks they can do a better job formatting the post to make it more organized and easier to read, DM me.
Not really good with these forum tools lol

[seal66]

Good to see people wanting to tune and run e85. Just be care on your maps. It took my turner a bit to get the k04 with s3's on full e85. But it ran great. Now with the proto injectors I can finally go bigger

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[Okedokey]

Awesome work bro! Sticky!

[StatusQuo]

Good to see people wanting to tune and run e85. Just be care on your maps. It took my turner a bit to get the k04 with s3's on full e85. But it ran great. Now with the proto injectors I can finally go bigger

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Hey man. Yeah I'm taking things slow. The K03 is demanding alot of fuel from these Injectors around the boost spike area. It's no problem with 50% but I might have to try some new things when I get to 75%.

If all fails, I'll lower peak boost when moving on to 100% e85. Dont wanna risk running lean or limp.



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I'm now working on Version 0.02 of the 50% file. The goal on this one is to balance out fueling per RPM and Injector Pulse using Injection correction. Should make for smoother Lambda readings during city driving.



.

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[Okedokey]

I have so much to learn :(

[StatusQuo]

I have so much to learn :(

Me too. Me too. Lol.


Anything I've said yet that needs more explaining? You can go ahead and ask.

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[StatusQuo]

I no longer have access to Maestro, but I will answer any questions I can.

Hey man. Did you ever mess with rail pressure? Anything you know about it? I've noticed some weird things.


It seems that rail pressure must be built. Or else this can become a problem when the throttle is smashed from low rpm. Starves some fuel when boost spikes and rail pressure hasn't had time to built But when pressure is already built up, there isn't an issue.


You think commanding higher rail pressure at low RPMs is a good idea?

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[p0isin]

My fuel rail pressure map builds hpfp pressure earlier than stock map in both rpm and throttle position. Makes it easier to hit target rail pressure when I go WOT.

Edit: current rail pressure target is 130 bar, I have a 145 bar prv

[StatusQuo]

My fuel rail pressure map builds hpfp pressure earlier than stock map in both rpm and throttle position. Makes it easier to hit target rail pressure when I go WOT.

Edit: current rail pressure target is 130 bar, I have a 145 bar prv

Thanks. I'm trying this. +2 to all cells and capped to 13 MPa.


I've been reading that the stick PRV is 126. But the stock stage 2 file has max set to 130. Is there is a way to tell I'm cracking the PRV? Wonder why eurodyne has set it like that.



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[derrek]

Thanks. I'm trying this. +2 to all cells and capped to 13 MPa.


I've been reading that the stick PRV is 126. But the stock stage 2 file has max set to 130. Is there is a way to tell I'm cracking the PRV? Wonder why eurodyne has set it like that.



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You can see it crack if you log with vagcom


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[p0isin]

^^^ yup, you'll see a quick drop off of pressure. I'd keep the max rail pressure at least 5-10 bar below the prv

[aluthman]

I have a 145 bar prv for sale...

[derrek]

^^^ yup, you'll see a quick drop off of pressure. I'd keep the max rail pressure at least 5-10 bar below the prv

This^

I have a 145 bar prv for sale...

x2


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[StatusQuo]

Yeah. I logged block 230 using the Maestro Logger (have VCDS, but I just got out of class and just had the tuning cable with me)

But anyways, can confirm that I'm cracking exactly at 126bar using the stock PRV.

Requested is 130 and I peak at 126.




I'd love to be 10bar below PRV but I don't think there would be enough flow for higher e85 content. I'm currently trying to find the max capabilities if the fueling. So for now I'll leave it the default 13 bar max.


I think before I move on to higher PRV, I'll polish the 50% file. Just gotta fix idle (too rich). I'll upload that file soon.


Just in case 100% e85 doesn't work out, there would be a good 50% file to look at. I'll post logs too so y'all can look at it.

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[derrek]

Yeah. I logged block 230 using the Maestro Logger (have VCDS, but I just got out of class and just had the tuning cable with me)

But anyways, can confirm that I'm cracking exactly at 126bar using the stock PRV.

Requested is 130 and I peak at 126.




I'd love to be 10bar below PRV but I don't think there would be enough flow for higher e85 content. I'm currently trying to find the max capabilities if the fueling. So for now I'll leave it the default 13 bar max.


I think before I move on to higher PRV, I'll polish the 50% file. Just gotta fix idle (too rich). I'll upload that file soon.


Just in case 100% e85 doesn't work out, there would be a good 50% file to look at. I'll post logs too so y'all can look at it.

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Just to give you some insight I was running the 155bar valve, s3 injectors, ttrs lpfp, rs4 lpfp controller, and 100% e85 but my fueling was still maxed out.


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[StatusQuo]

Just to give you some insight I was running the 155bar valve, s3 injectors, ttrs lpfp, rs4 lpfp controller, and 100% e85 but my fueling was still maxed out.


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Damn. Was this on a stock turbo?

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[Okedokey]

Just to give you some insight I was running the 155bar valve, s3 injectors, ttrs lpfp, rs4 lpfp controller, and 100% e85 but my fueling was still maxed out.


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Stock HPFP?

[derrek]

Damn. Was this on a stock turbo?

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This was on a k04

Stock HPFP?

Sorry I assume hpfp is a given now a days.

I used the apr hpfp and the ie hpfp. The ie pump flows more just a FYI.


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[aluthman]

People still use stock hpfps? I'm selling one of those too (HPFPupgrade stage 1)...

[StatusQuo]

Just to give you some insight I was running the 155bar valve, s3 injectors, ttrs lpfp, rs4 lpfp controller, and 100% e85 but my fueling was still maxed out.


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Oh yeah. I have been able to get the car to run 100% e85 before. But I went into limp mode once (partial throttle) and didn't know why. My friend made the tune.

This time I'm starting from scratch and I'm trying to learn why. I have a hunch it was the rail pressure at low RPMs. Hence the emphasis getting the rail pressure tuned now...

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[StatusQuo]

People still use stock hpfps? I'm selling one of those too (HPFPupgrade stage 1)...

Is the hardest extra seal on those pumps something I should have? I have an autotech pump... The hpfpupgrade site says other pumps seal leak at past 135 bar. Not sure if that's a marketing thing.

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[derrek]

Oh yeah. I have been able to get the car to run 100% e85 before. But I went into limp mode once (partial throttle) and didn't know why. My friend made the tune.

This time I'm starting from scratch and I'm trying to learn why. I have a hunch it was the rail pressure at low RPMs. Hence the emphasis getting the rail pressure tuned now...

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You're going to run into problems with the lpfp keeping up. Ttrs pump is an easy upgrade but if you want to go bigger it won't be enough.


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[StatusQuo]

0.02 uploaded along with a general driving log with some WOT. my LTFT are about 3.1.

Knocking way less than the stock stage 2 file on pump gas. I was getting 6 to 9.0 knock on it.

This may be my last 50% file. gas is almost on red so I might go full e85 on the next fill. Some polishing is in order on the injection correction table. sometime ill write up a short guide on how to use datalogs.


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The only weird issue is if i blip the throttle slightly, AFR goes bonkers for a sec and goes back to normal. no knocking experienced and idk if i had this before and was normal lol.


Edit. Maybe yall might find this dyno chart interesting

[StatusQuo]

Update: 100% e85 achieved. No limp mode. I'm in fact pulling fuel at WOT so there is some headroom to play with.


I'll be uploading the file when I get home. Along with a WOT log. The file is no where near perfect but it is drivable and runs. Almost no knock unless it's at high RPM and that's only -3 so I feel it's safe.

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[Okedokey]

Yes, please upload file.

[StatusQuo]

@p0isin and @derrek.


You guys were pretty much spot on on using a lower MPa than the cracking pressure. I don't know why eurodyne chose to use 130bar. The valve cracks and pressure drops hard, starving fuel. It's better to just run a slightly lower pressure to prevent all those fluctuations.

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[StatusQuo]

Yes, please upload file.

Yeah Ill have it up tonight man. I'm making some edits to the Injection Correction table and I'll upload right after the test if I don't go limp.

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[derrek]

Yeah Ill have it up tonight man. I'm making some edits to the Injection Correction table and I'll upload right after the test if I don't go limp.

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Get a log with rpm, lambda, boost, and fuel pressure low and high.

[StatusQuo]

Get a log with rpm, lambda, boost, and fuel pressure low and high.

Do you know what blocks that would be?

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[derrek]

Do you know what blocks that would be?

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Not off the top of my head. If you got to advanced measuring values you can pick what you want out of all of them.


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[Okedokey]

With VCDS? Just go to engine, measuring blocks and check the check-boxes with those measures.

[derrek]

Do you know what blocks that would be?

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001-1 Engine speed
031-1 Lambda sensor current value
031-2 Lambda sensor specified value
103-1 current fuel pressure
115-3 Boost pressure specified
115-4 Boost pressure actual
230-1 Rail pressure specified
230-2 Rail pressure actual

[StatusQuo]

Get a log with rpm, lambda, boost, and fuel pressure low and high.

here you go!


https://www.dropbox.com/s/mll8zo2qrg...-2303.CSV?dl=0

[derrek]

here you go!


https://www.dropbox.com/s/mll8zo2qrg...-2303.CSV?dl=0

Time for a new pump


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[StatusQuo]

Time for a new pump


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hahaha yeah I was looking at that. under 2 bar lol.

Some questions. Do you know exactly what Acceleration enrichment does?

Also, what PWM compatible pumps do you recommend that I can mod in while still retaining anti surge?
RS4 controller?

[StatusQuo]

Yes, please upload file.

Got it uploaded.

[aluthman]

hahaha yeah I was looking at that. under 2 bar lol.

Some questions. Do you know exactly what Acceleration enrichment does?

Also, what PWM compatible pumps do you recommend that I can mod in while still retaining anti surge?
RS4 controller?

RS4 controller with ttrs lfp

[seal66]

Rs4 controller or torquebyte with a ttrs.
Heck if you want to just keep things low cost replace the stock lpfp and run aprs unvi inline pump setup

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