[TheGoodTheBadTheUgly]

Wouldn't it be a good idea to install a better diverter valve so it can hold up boost better at high RPM then see how you can maximise your stock turbos, or is it not worth it?

[Kevin39]

I wouldn't think a diverter valve on a stock turbo would be worth it. It's the small turbo itself that's preventing you from holding any boost up top.

[philgli]

Originally Posted by Turbod

Pladi is correct that the MHD OTS maps are load targets. I believe Wedge (Ken) is using commanded WGDC. The JB4 targets boost pressure.

ok this is helpful! Here are 2 logs if you guys wouldn't mind reviewing!

https://datazap.me/u/philgli/map-2-o...og=0&data=3-15

https://datazap.me/u/philgli/stage-2...og=0&data=3-15

[TheGoodTheBadTheUgly]

Originally Posted by Kevin39

I wouldn't think a diverter valve on a stock turbo would be worth it. It's the small turbo itself that's preventing you from holding any boost up top.

Don't know man, my diverter valve just gave up so I have to replace it. Might as well install a performance one, but I heard from searching that they manage to hold boost better than the stock one. Was just proposing something here but again like you said, it might not even be worth it!

[xxMike61]

Originally Posted by philgli

ok this is helpful! Here are 2 logs if you guys wouldn't mind reviewing!

https://datazap.me/u/philgli/map-2-o...og=0&data=3-15

https://datazap.me/u/philgli/stage-2...og=0&data=3-15

I have a pretty similar set up to you minus the upgraded hoses. Just installed the GFB DV and I'm still 2~ psi under boost. Old DV wasnt torn but figured the upgrade wouldn't hurt.

Took a couple logs at MHD 1+ and can't say for sure if it was worth it lol.

[TheGoodTheBadTheUgly]

Originally Posted by xxMike61

I have a pretty similar set up to you minus the upgraded hoses. Just installed the GFB DV and I'm still 2~ psi under boost. Old DV wasnt torn but figured the upgrade wouldn't hurt.

Took a couple logs at MHD 1+ and can't say for sure if it was worth it lol.

Interesting to know. Guess he was right, doesn't really make a difference. I gotta change that thing before my compressor surge really guts the turbo tho!

[Kevin39]

Ok yeah that's different, if you have to replace a broken stock one and the GFB DV is pretty cheap, it's not gonna hurt anything to upgrade.

[9krpmrx8]

I have hit north of 25psi a few times on stage 2+. Lower now that I am on the E50 tune though.

[philgli]

Originally Posted by 9krpmrx8

I have hit north of 25psi a few times on stage 2+. Lower now that I am on the E50 tune though.

Again, am i taking CRAZY PILLS?? You hit that before e85 or any meth or anything?

just FBO and stage 2+? was it a custom tune?

How am i stage 2 and only hitting 11 psi

[9krpmrx8]

Yes this was on good ole Texas 93. I have never had a misfire ever either in 103,000 miles. Stock coils, stock plugs, replaced at 75k when I went stage 2+.

[xxMike61]

Hmm do you have any logs? I've noticed that sometimes the actual boost surges a lot higher than the target after I let off the throttle.

[philgli]

Originally Posted by xxMike61

Hmm do you have any logs? I've noticed that sometimes the actual boost surges a lot higher than the target after I let off the throttle.

Do you actually have a log I can see too?

Mine will be 11.5 pretty steady and then show peak of like 12.5 because of a tiny spike near the end.

[xxMike61]

https://datazap.me/u/xxmidnite/log-1...=1&data=3-4-11

[philgli]

Originally Posted by xxMike61

https://datazap.me/u/xxmidnite/log-1...=1&data=3-4-11

well, i am super jealous. is your tune the off the shelf 2+?

we have identical mods except i am stage 2...

you even have boost OVER the target for a little while...

[weehe126]

Originally Posted by Austin_2019_X5_50i

What is e85 and how is it different from 93 octane at the pump? Would it benefit me if I fill my car up with it? Any comments or suggestions would be greatly appreciated!!!

Again, you have a totally different engine. I don't even understand why you are even posting in this thread. Look into the F10 550i forums and you will find more answers.

[TheGoodTheBadTheUgly]

Originally Posted by Austin_2019_X5_50i

What is e85 and how is it different from 93 octane at the pump? Would it benefit me if I fill my car up with it? Any comments or suggestions would be greatly appreciated!!!

Like others stated you should probably roam more around forums linked to your engine because you will find stuff that is more useful and directly linked to what you have!

E85 is a type of fuel that has a high percentage in ethanol. Usually it is based of 85% Ethanol and 15% gasoline. These percentages can vary depending on mixing.

Anyhow, the main advantage of this type of fueling is that Ethanol chemical properties make it better in many ways.

First off it has a higher knocking resistance. This allows you to run your engine in a more aggressive way via a tune while still having fewer corrections than Octane.

On a thermodynamic level, the combustion of ethanol generates more heat (energy) meaning that the combustion is more violent than the same set-up but with octane. More violent combustion due to a higher energy generation means that you can have a higher torque!

Finally, ethanol also has, simply put, some "cooling" properties since it has a thermal mass capacity that is lower than Octane and for others reasons. Cooler mixture with also means that it is denser so that there is more O2 for the same volume. The more O2 you can have for a combustion, the more power you can make out of it!

So yes, E85 is absolutly great and amazing if you get it custom tuned to pull out the most you can from it.

[TheGoodTheBadTheUgly]

Originally Posted by Austin_2019_X5_50i

So where can I get this? And do I just fill up my tank or do I need to ask the guy who tuned my car how much and what mixture to put in? When you say mixture, do you mean e85 to regular fuel at gas station or the e85 specific mixture? I couldn’t ruin my car by putting it in my car right now could I? Thanks so much for the help!

I thought ethanol was bad? Gas stations say fuel contains up to 10% ethanol

So I don't know exactly for your engine but I would say you definitely need to tune the car in order to use this new fuel since it is quite different from regular octane. Up here in Canada, we don't have much E85, but normally it's just a different pump a bit like how the diesel pump is different from the regular octane one.

Anyhow, you should really ask on your forum what to do and what do you need to run E85, because in some case, like our 335s, some upgrade to the fueling system need or should be done.

But again, there are a lot of things that are really specific to your engine and that you should ask on these forums and probably talk to your tuner as well!