[Daleb]

Originally Posted by ZM2

Here’s a log of my finalized E47 tune with Halim: https://www.bootmod3.net/log?id=5efc...729b2bbd3df3f0 Super strong & stable, even on a 100F+ day when I was doing some other logs.

We tried pushing the Dinan turbo further (up to 23.5psi), but it couldn’t handle it. Altho, it’s pretty impressive to see the little Dinan running strong at 20-21psi! Dyno coming in a couple weeks.

The good news is Halim was focused on making this (or slight variation) an OTS map for the folks running ethanol with upgraded HPFP’s (Stg 2H E30), so you all may see the benefits of this effort soon...

20 psi flat with good timing must be fun 👍🏼.

Hopefully they offer the maps in a stage 2+ fashion like they have with the b58.

Looking forward to the dyno results. 390-400whp on stage 2 93 and 420-430whp on stage 2 e30 seems to be the normal dyno jet numbers so let’s see what your new setup can do.

Out of interest how does halims map feel vs carys?

[ZM2]

Originally Posted by Daleb

20 psi flat with good timing must be fun 👍🏼.

Hopefully they offer the maps in a stage 2+ fashion like they have with the b58.

Looking forward to the dyno results. 390-400whp on stage 2 93 and 420-430whp on stage 2 e30 seems to be the normal dyno jet numbers so let’s see what your new setup can do.

Out of interest how does halims map feel vs carys?

The Stage 2+ B58 maps are what Halim mentioned when we started working on these, so I think that is his goal for the N55. The difference being a turbo and HPFP are likely needed for the N55, whereas just the HPFP is needed for the B58. I don't know for sure on this, tho, and it depends on where Halim goes with the OTS tune.

The map is a blast, especially around town b/c Halim lets the boost spike up fast to 21psi, and then lets it come down and rebuild based on other parameters. So, major tire shredding fun even with my 285 4S's

I'm still working thru the process with Cary, so I'll have to wait to provide feedback on that. Hopefully we can get a stable higher boost map nailed down this coming week, and we can compare. Anyone can PM me for more details on that.

Quick shout out to SeanWRT for helping to provide input on logs!

[AmuroRay]

This is awesome data. Do you plan on utilizing Virtual Dyno as a comparison?

[krizze]

So the tune is now being done in Amsterdam in August, however I can report that I fuel flow is really good according to AWRON 200-220 Bar can feel the hesitation has gone from the revs and the engine feels like it pulls more high end

[ZM2]

Originally Posted by AmuroRay

This is awesome data. Do you plan on utilizing Virtual Dyno as a comparison?

Nahh, I’ll do Dynojet pulls in a couple weeks on the Stock map and Halim’s and Cary’s to see how the curves look.

I don’t think the hp is going to be mind blowing. The Dinan turbo still flows quite a bit less than the Stage 2 turbos, but there’s no way to keep the car cool enough on track on a 95F+ summer day with a larger turbo without turning the boost down quite a bit, driving easier, or using a ridiculous amount of meth.

And, we tuned for stability and clean logs, vs boost and dyno hp. It’s amazing how smooth this map feels despite the noticeable extra power.

I will say the great thing about the Dinan setup is there’s no lag and the car is ultra responsive around town. It def feels like a different machine and is a ton of fun!

[Daleb]

Originally Posted by AmuroRay

This is awesome data. Do you plan on utilizing Virtual Dyno as a comparison?

Some virtual dyno runs in the thread below: stock turbo, e85 and hpfp upgrade.

https://f87.bimmerpost.com/forums/sh....php?t=1736706

[AmuroRay]

I saw yours, and that's what gave me the idea.

[Dec540]

Here's my latest logs running full E85 and the Dorch stage 2 HPFP, for those that are interested.

https://www.bootmod3.net/log?id=5f09...0b430700153f46

[Dec540]

I've also logged with Halim's OTS Stage 2+ BETA tune running approx E40. https://www.bootmod3.net/log?id=5f0a...90c62825d9a6e6

Here's a virtual dyno comparison on the same piece of road showing the two tunes. Note neither are final but it's still interesting to see. These were done 1 day apart on the exact same piece of tarmac, though there was a 5 degree F difference, which I added into virtual dyno to try keep things as balanced as possible.

[ZM2]

Originally Posted by Dec540

I've also logged with Halim's OTS Stage 2+ BETA tune running approx E40. https://www.bootmod3.net/log?id=5f0a...90c62825d9a6e6

Here's a virtual dyno comparison on the same piece of road showing the two tunes. Note neither are final but it's still interesting to see. These were done 1 day apart on the exact same piece of tarmac, though there was a 5 degree F difference, which I added into virtual dyno to try keep things as balanced as possible.

Hell of a result with a stock turbo!

[JKen_0115]

Originally Posted by Dec540

I've also logged with Halim's OTS Stage 2+ BETA tune running approx E40. https://www.bootmod3.net/log?id=5f0a...90c62825d9a6e6

Here's a virtual dyno comparison on the same piece of road showing the two tunes. Note neither are final but it's still interesting to see. These were done 1 day apart on the exact same piece of tarmac, though there was a 5 degree F difference, which I added into virtual dyno to try keep things as balanced as possible.

Are you working with Halim as a custom map for your setup particularly? I'm planning to upgrade Dorch STG2 but I'm wondering if I need to find the custom map tuner or something I can leverage from OTS map soon? I'm running the stock turbo and I don't plan to upgrade turbo future.

Thanks,

[Dec540]

Originally Posted by JKen_0115

Are you working with Halim as a custom map for your setup particularly? I'm planning to upgrade Dorch STG2 but I'm wondering if I need to find the custom map tuner or something I can leverage from OTS map soon? I'm running the stock turbo and I don't plan to upgrade turbo future.

Thanks,

I'm working with him on an OTS tune a the moment that I think he is going to try make public in the not too distant future. The tune I'm working with him on is an E30-E40 mix though.

If you're going stage 2 Dorch I'm guessing you want to run higher E mixes?

[JKen_0115]

Originally Posted by Dec540

I'm working with him on an OTS tune a the moment that I think he is going to try make public in the not too distant future. The tune I'm working with him on is an E30-E40 mix though.

If you're going stage 2 Dorch I'm guessing you want to run higher E mixes?

Actually I'm on the fence to determine either STG1 or STG2. I'm in Chicago area and fall/spring temp will drop down to 50F where I will still need to drive. Will it be a problem? I was thinking to run full E85 since I don't want to mix the certain ratio. In terms of power, I plan to utilize my stock turbo and I have been running stock HPFP at 17.3PSI. What would you suggest this situation? I don't track the car.

[Dec540]

Originally Posted by JKen_0115

Actually I'm on the fence to determine either STG1 or STG2. I'm in Chicago area and fall/spring temp will drop down to 50F where I will still need to drive. Will it be a problem? I was thinking to run full E85 since I don't want to mix the certain ratio. In terms of power, I plan to utilize my stock turbo and I have been running stock HPFP at 17.3PSI. What would you suggest this situation? I don't track the car.

I personally just went the Stage 2 for as much headroom as possible. It runs full E85 without any problems. I think Stage 1 would only handle lower E-mixes but there's no real rating on Dorch's website so maybe ask them.

If you go E85 you'll need a custom tune.

[ZM2]

Originally Posted by JKen_0115

Actually I'm on the fence to determine either STG1 or STG2. I'm in Chicago area and fall/spring temp will drop down to 50F where I will still need to drive. Will it be a problem? I was thinking to run full E85 since I don't want to mix the certain ratio. In terms of power, I plan to utilize my stock turbo and I have been running stock HPFP at 17.3PSI. What would you suggest this situation? I don't track the car.

Agreed with Dec540 and my comment above about HPFP dip with Dorch Stage 1 HPFP, E47, and 23psi (in summer).

If you want to run full E85, go Stage 2. Altho, you’ll be hitting the start button 2-3 times with full E85 in a Chicago winter.

[Dec540]

Originally Posted by ZM2

Agreed with Dec540 and my comment above about HPFP dip with Dorch Stage 1 HPFP, E47, and 23psi (in summer).

If you want to run full E85, go Stage 2. Altho, you’ll be hitting the start button 2-3 times with full E85 in a Chicago winter.

Custom tuners can greatly improve cold start of full E85.

[ZM2]

Hey everyone, I'm putting the car on a Dynojet next week, but I've already experienced the variability in ethanol content in E85 flex fuel...

The car had been running great for over a week and then I stared to get little misfires under load. After some investigation (coils, plugs), more E85 flex fuel (51-85% ethanol) is what made it go away.

Do you all have input on the various options to easily check the ethanol content of the fuel in the tank? I don't plan on having a tune that adjusts to ethanol content. It looks like the Fuel-It and Spool analyzers are the way to go?

Thanks!

[AmuroRay]

I have no experience with ethanol, so I don’t have any advice unfortunately. Hope you get it sorted before the dyno.

[ZM2]

Originally Posted by AmuroRay

I have no experience with ethanol, so I don’t have any advice unfortunately. Hope you get it sorted before the dyno.

It’s running strong after adding more E85 to this last tank. Just need to start monitoring actual ethanol content in the fuel.

Seems easy enough, get a Bluetooth enabled sensor and open a phone app. Just curious which sensors and apps folks like.

[Anthony1s]

Originally Posted by ZM2

It’s running strong after adding more E85 to this last tank. Just need to start monitoring actual ethanol content in the fuel.

Seems easy enough, get a Bluetooth enabled sensor and open a phone app. Just curious which sensors and apps folks like.

1) Put bad fuel in your car > starts misfiring > put better fuel in your car
or
2) Put bad fuel in your car > ethanol sensor reads it > put better fuel in your car

I don't see how having an ethanol sensor changes anything. Are you just not gonna fill up your car anymore, in case the fuel is bad and you have to add more?

I think the better solution is to test the fuel before you put it in. Bunch of testers available on amazon.

https://www.amazon.com/s?k=ethanol+t...f=nb_sb_noss_1

Or do you want the ethanol sensor so you can add octane booster when it's low? Can you do that? Does octane booster work with e85?

[ZM2]

Your last thought is close to what I have in mind, with a twist.

Checking the E content with testers at the pump each time will be a PITA, especially when traveling bn different stations.

If I watch the percentage and find a range of ethanol that works as a minimum to not have misfires and a maximum to not have HPFP drops, I can aim for the middle and I’ll likely be OK at each fill up.

To surefire that approach I can pretend my tank holds 13gal (instead of 13.7), aim for the middle, check the percentage on the app, and add a little more E85 or 93 if I’m outside those bounds—which, I don’t think will happen often once I learn the bounds.

You need the data either way, and being able to read it in an app is a lot easier, quicker, and less messy than carrying testers in the trunk and measuring at each fill up.

Now, the easiest option is to get a Stage 2 HPFP and feed the ethanol data into an Ecutek and then you’re covered no matter what’s in the tank, but I don’t want to run a super high Emix and I’ve got a map that’s max’ing out my setup and is probably the max an OG M2 can handle on track in summer for a 45min stint, so I want to see if I can learn to manage it throughout the year and across the US. I don’t think it’ll be much of pain once I get in the swing of it.

If it does become a pain, I have three other revisions of this map that each get more aggressive. I can likely bump down a revision and run 50/50 E85 flex/93 octane no matter where I go and be OK, and save the most aggressive version for max power and when I’m OK with monitoring ethanol content. Manual Ecutek, if you will...

The last note I’ll make is the misfires I’m talking about are little hiccups when doing a 3rd gear low to high RPM log, not normal driving. These misfires are small enough that they don’t even register as knock in the logs. I just feel them and am annoyed by it even tho they don’t appear in normal non-log driving. The car is a damn riot right now, so I’m curious to see what the dyno shows.

[SeanWRT]

Originally Posted by Anthony1s

1) Put bad fuel in your car > starts misfiring > put better fuel in your car
or
2) Put bad fuel in your car > ethanol sensor reads it > put better fuel in your car

I don't see how having an ethanol sensor changes anything. Are you just not gonna fill up your car anymore, in case the fuel is bad and you have to add more?

I'm not with you on the logic here. And I just don't feel right to see this misinfo spreading in the air.

It's actually simple and very basic - you don't want to know misfire by misfiring your engine.

Driving with a misfire engine (often casued by bad plug or actual imbalanced air/fuel mixture to specific ECU calibration) does physical harm to the engine, no mention of the car accident it adds chances to happen.

A direct result of misfire is the engine vibration (among others), it's especially harmful at high load, and is very sensible to the driver in the cabin. It literally means the rest of the rod/pistion assembly trying to bend your crankshaft which adds significant stress to the components the assembly machenically works with. That's why CEL will be thrown upon misfire.

It's a very protective thing to know the E mixture to make sure you don't have less than needed E in your tank to run the map.

Appologies for my bad english.

Sean