[Newguy123]

Originally Posted by bmw0bsession

I personally had major issues with 5.5, I am on 5.3 again. Had MAJOR misfires

I've always said don't fix it if it ain't broke!

[danielescobarg]

Fired car today. All seemed fine mechanically wise, and then the needle sweep that t regularly does on start-up started to happen every 5 seconds, like the JB4 was not communicating. Did some trouble shooting and could not find any electrical connection. idle was a bit erratic. Emailed Terry and came down to the P3 cars OBD gauge. Apparently it fights over CAN-bus space and they will have issue working together. Funny thing is that the car had the P3 cars gauge for over a year now with no issues. Dont know if the new ISO plus the flex fuel wires take up more canbus space, but as soon as i unplug the obd port, it started working fine.... go figure..

What are you guys using to see boost? I think that the P3 car be left with just a analog tap from the manifold and then it will not use canbus space.

Daniel

[PeterPure]

Originally Posted by danielescobarg

Fired car today. All seemed fine mechanically wise, and then the needle sweep that t regularly does on start-up started to happen every 5 seconds, like the JB4 was not communicating. Did some trouble shooting and could not find any electrical connection. idle was a bit erratic. Emailed Terry and came down to the P3 cars OBD gauge. Apparently it fights over CAN-bus space and they will have issue working together. Funny thing is that the car had the P3 cars gauge for over a year now with no issues. Dont know if the new ISO plus the flex fuel wires take up more canbus space, but as soon as i unplug the obd port, it started working fine.... go figure..

What are you guys using to see boost? I think that the P3 car be left with just a analog tap from the manifold and then it will not use canbus space.

Daniel

Jb4 mobile app on the phone you can see a lot more than just boost.

[Walker16]

I just download and tested out a app called dash commander. I was surprised it actually works. When I get my jb4 installed in a few days I'll see how accurate it is but since it pulls straight from the odb2 port it should be pretty close. Using a iPhone 5s with a wifi obd2 adaptor.

It also seems pretty customizable. Worth checking out if someone wants a cheep osd of lots of different sensors.

[danielescobarg]

Did first log.

This is map 6 boost target 15 flat.

90 octane (AKI) + Meth. This is best fuel we have down here.

Also, Im located at 5000 FT.

Ign is a bit low, I think that in the mid range a bit more is doable and keep it like that in the top end. Will try more logs tonight to have a baseline map for Daily driving and then will start playing with some 104 AKI Race gas.



Best,

Daniel

[paradoxical3]

I am surprised your timing is so low with meth. Timing is low for sure in the beginning.

[paradoxical3]

Originally Posted by Walker16

I just download and tested out a app called dash commander. I was surprised it actually works. When I get my jb4 installed in a few days I'll see how accurate it is but since it pulls straight from the odb2 port it should be pretty close. Using a iPhone 5s with a wifi obd2 adaptor.

It also seems pretty customizable. Worth checking out if someone wants a cheep osd of lots of different sensors.

JB4 won't work with an OBD2 sensor. Has to be one or the other, unfortunately.

[danielescobarg]

Originally Posted by paradoxical3

I am surprised your timing is so low with meth. Timing is low for sure in the beginning.

Meth only kicks in at 3000. You can see that spot of low timing at that point.
I think thats about normal given the car has 90 octane fuel.

Will try to lower meth to 2000 to see if helps on the low end.
Average ign was around 3-4

[1cleann55]

Originally Posted by danielescobarg

Meth only kicks in at 3000. You can see that spot of low timing at that point.
I think thats about normal given the car has 90 octane fuel.

Will try to lower meth to 2000 to see if helps on the low end.
Average ign was around 3-4

Are you using 50/50 meth/water?

[danielescobarg]

Originally Posted by 1cleann55

Are you using 50/50 meth/water?

Yes. Going to try 70/30 tomorrow. Not sure if im comfortable though.. Maybe using a remote tank in the back.

What mixture are you all using? Does it really help to use more meth than water? What about 100% meth. The car has a race FMIc from AA, so cooling wise its fine. Definitely more octane would benefit more that the cooling part. Not sure about the flammable part

[PeterPure]

Originally Posted by danielescobarg

Yes. Going to try 70/30 tomorrow. Not sure if im comfortable though.. Maybe using a remote tank in the back.

What mixture are you all using? Does it really help to use more meth than water? What about 100% meth. The car has a race FMIc from AA, so cooling wise its fine. Definitely more octane would benefit more that the cooling part. Not sure about the flammable part

I run around 90/10 mix. I tried 100 meth as well. But some water helps with timings as well.

[MadToy]

What PSI is the meth set to come on at? Probably not flowing early in that log. And with 90 octane at 5k feet, that looks about right. Holds boost real nice though out to 6k. Gotta put that Pure on the want list

[danielescobarg]

Originally Posted by MadToy

What PSI is the meth set to come on at? Probably not flowing early in that log. And with 90 octane at 5k feet, that looks about right. Holds boost real nice though out to 6k. Gotta put that Pure on the want list

On map 6 im not sure its triggered at a certain psi. It has some sort of auto-tune and will go full flow from a certain rpm point. I had it at 3000, will lower to 2000. I have FUB at 2, so if meth flow is below 100 for less than 1 second the map will lower boost as a fail safe.

[bmw0bsession]

Originally Posted by Darkhold

I run around 90/10 mix. I tried 100 meth as well. But some water helps with timings as well.

You have balls my friend, I always fear fire with a mix like that!

[PeterPure]

Originally Posted by MadToy

What PSI is the meth set to come on at? Probably not flowing early in that log. And with 90 octane at 5k feet, that looks about right. Holds boost real nice though out to 6k. Gotta put that Pure on the want list

Bms meth kit is configurabel to start at x psi. I have it set at 12 psi.

[PeterPure]

Originally Posted by danielescobarg

On map 6 im not sure its triggered at a certain psi. It has some sort of auto-tune and will go full flow from a certain rpm point. I had it at 3000, will lower to 2000. I have FUB at 2, so if meth flow is below 100 for less than 1 second the map will lower boost as a fail safe.

My map6 still triggers meth flow at x psi (12 in my case). I never knew it was rpm triggered.

[PeterPure]

Originally Posted by bmw0bsession

You have balls my friend, I always fear fire with a mix like that!

Petrol is also flammable. I am pretty convenient even running 100% meth. I just run some water in the mix to improve timings.

[danielescobarg]

Originally Posted by Darkhold

My map6 still triggers meth flow at x psi (12 in my case). I never knew it was rpm triggered.

YOur right, you can use PSI as a trigger too. Also RPMs, TPS, Gear, AFR.

I just cant seem to get consistent flow before 3000 RPMS, where my timing sucks.

Did some more logs today.

First one is now with a 90/10 meth mix. This one is 17 PSI throughout the whole range. See that meth flow is not good till about 3500 and im having issues with it staying at 100% it goes back and forth. On this run had to use the windshield spray to get it back to 100% every time......

Turbo is maxed after 5500 rpms. I guess my altitude wont allow anything over 15 psi after about 6000. It may be low, but before t was like 8 PSI....so major improvement.



Also, did a 2nd run with a higher boost peak in the mid range given that the PWM is still low between 2500 and 5500.

This time I had the windshield spray on the hold time in order to have 100% flow throughout the run.

This time had a 19 PSI peak with a tapering at 17 PSI, obviously at my altitude that is not possible. Its nice to see that turbo still has more to it in the mid range.... maybe 20-21 is possible with better fuel.

it sucks to have to use meth as an additive with such a crappy base gas.... I still cant get any good timing before 3000-3500 RPMS. May need to set a lower PSI target before that.



Anyways... this turbo ROCKS!!!!!

Will probably end up settling for something in the order of 13PSI until 3000 RPMS and ump it up to about 17-18 from 3000 to 5000 and tapper it down to 15 till 6000 and 13 till 7000. I think thats the limit on 90 octane and meth.

My only concern right now is meth flow.... Terry suggests a rear tank to solve the issue.... will try to set that too this weekend.

Hopefully next week will hit the dyno and play with some race gas.

Daniel

[PeterPure]

Well i would actually lower boost with 90 octane fuel. I can do 15.5 psi with near perfect timings on 93 octane + meth. That means avg ign stays below 1 on multi gear pulls. I prefer better timings over boost really.

And yes i would advice using trunk tank as well. Its a lot safer

[PeterPure]

Also your AFR's seem a bit on the lean side. Do you have FF wires installed?

Single gear pulls only tell half the story. You can get away with worse fuel and still show decent timings. If suggest you log a 3rd gear pull, shift into 4th and keep pulling till 6.5k rpm.

My bet is your timings will be worse. And in daily driving I guess you more often do a 2 gear pull over a 1 gear pull. Atleast then you know where you are at. And indeed you need to fix meth flow. A trunk mount kit will solve that.

But to get AVG ign below 1.5 on multigear pulls I have to lower boost to 15.5 with 93 and meth. For higher boost levels I run ethanol mixed with my 93 fuel. I usually daily drive 20-25% E100 mixed with 80-75% 93 and meth. This gives me avg ign < 0.5 at 16 psi on multi gear pulls. I can max out the turbo (20/21 psi midrange tapering to 17.5 at 6k) with this setup as well. Single gear pulls still show avg ign under 1.5 but multi gear pulls can go into the high 2's. Which is doable on occasion. But I prefer avg ign to be under 1.0 on multi gear pulls. So more boost = more octane needed!

[1cleann55]

Originally Posted by Darkhold

Also your AFR's seem a bit on the lean side. Do you have FF wires installed?

Single gear pulls only tell half the story. You can get away with worse fuel and still show decent timings. If suggest you log a 3rd gear pull, shift into 4th and keep pulling till 6.5k rpm.

My bet is your timings will be worse. And in daily driving I guess you more often do a 2 gear pull over a 1 gear pull. Atleast then you know where you are at. And indeed you need to fix meth flow. A trunk mount kit will solve that.

But to get AVG ign below 1.5 on multigear pulls I have to lower boost to 15.5 with 93 and meth. For higher boost levels I run ethanol mixed with my 93 fuel. I usually daily drive 20-25% E100 mixed with 80-75% 93 and meth. This gives me avg ign < 0.5 at 16 psi on multi gear pulls. I can max out the turbo (20/21 psi midrange tapering to 17.5 at 6k) with this setup as well. Single gear pulls still show avg ign under 1.5 but multi gear pulls can go into the high 2's. Which is doable on occasion. But I prefer avg ign to be under 1.0 on multi gear pulls. So more boost = more octane needed!

His AFR aren't that bad. N55 start off a little lean and richen up a little up top. He should be ok running 15-16psi considering he has meth

[PeterPure]

Originally Posted by 1cleann55

His AFR aren't that bad. N55 start off a little lean and richen up a little up top. He should be ok running 15-16psi considering he has meth

Single gear pulls only show half the story imo. I wouldnt run 16 psi on just meth and 90 octane.