[Bmw doubles]

Originally Posted by kd0t

@ocN55 hey we should do a pull to see the comparison! You're local to me as well

Safely as possible of course

[kd0t]

Originally Posted by Bmw doubles

Safely as possible of course

Safety first. Always

[ocN55]

Also, everyone note how the flash tune was not only able to give me 30 more hp and 60 more tq over the JB4. But it did so with a richer AFR and less boost!

Originally Posted by ROBNYC

Great to hear, are you planning on upgrading your turbos?
How about a can of Torco to see what it does with 93-94 octane on your next dyno considered?
Can you run E30 blend with your current tune?
If you're only at 13lbs of boost, how much were you doing with JB4?

I don't plan on going big turbo on this car. Maybe I'll try that but I'm a fan of running an E85 blend.

And yes, Alex said that my ecu can adapt to ethanol. We will be playing around more with this in the coming weeks!

Originally Posted by kd0t

@ocN55 hey we should do a pull to see the comparison! You're local to me as well

let me know brotha, maybe we can see meet up at a car meet.

[FSociety]

ocN55 keep us posted

[Zel335]

Originally Posted by ROBNYC

ocN55 keep us posted

Yes please do.

[Anthony235]

would be interested in seeing the JB4 logs of these runs if possible...

[ocN55]

Originally Posted by Anthony235

would be interested in seeing the JB4 logs of these runs if possible...

I have them. I'll post them on datazap when I get the chance.

[ocN55]

Originally Posted by Anthony235

would be interested in seeing the JB4 logs of these runs if possible...

http://www.datazap.me/u/sc67065/mp-s...-4-5-6-9-12-18
Here is a log of my current flash tune.
I'll be posting my old jb4 91 octane logs too. You will notice that my AFR are leaner, avg ign is poor, my throttle is struggling to stay open, and I'm boosting more despite making less power.

[FSociety]

Originally Posted by ocN55

http://www.datazap.me/u/sc67065/mp-s...-4-5-6-9-12-18
Here is a log of my current flash tune.
I'll be posting my old jb4 91 octane logs too. You will notice that my AFR are leaner, avg ign is poor, my throttle is struggling to stay open, and I'm boosting more despite making less power.

Luminous Darkiedm4 cryptocar dd1981 you guys know more about logs than me lol

[ocN55]

Compare the flash tune log above with this JB4 log here. Same fuel and mods (minus IC).
http://datazap.me/u/sc67065/jb4-map-...-4-5-6-9-12-18
Notice how without the flash tune my car has leaner afr, poorer timing, more throttle closures and more boost while making significantly less power (if you see the dyno chart in the OP).

[Bmw doubles]

Flash tunes are smoother no doubt. Not to discredit the jb4 because Terry does have some nice backend flashes that compliment the jb4 on the n54. Not sure if he has backend flashes for the n55 or otherwise.

[ocN55]

Originally Posted by Bmw doubles

Flash tunes are smoother no doubt. Not to discredit the jb4 because Terry does have some nice backend flashes that compliment the jb4 on the n54. Not sure if he has backend flashes for the n55 or otherwise.

Terry has none for the N55 sadly, it would be a game changer if he did. But there are a few pioneers of stacking flash tunes as a BEF (from places like MP, ENZO, ACF).

[ocN55]

Originally Posted by ocN55

http://www.datazap.me/u/sc67065/mp-s...-4-5-6-9-12-18
Here is a log of my current flash tune.
I'll be posting my old jb4 91 octane logs too. You will notice that my AFR are leaner, avg ign is poor, my throttle is struggling to stay open, and I'm boosting more despite making less power.

Did a log today with the flash tune and 91 octane, JB4 only used to log.

I'm shocked that I was was hitting 17psi of boost and a 0.9 avg ign, on 91 octane!

AFR still looking nice and safe
http://www.datazap.me/u/sc67065/stre...=1-2-4-5-12-18

[Liquidpaper]

Originally Posted by ocN55

Did a log today with the flash tune and 91 octane, JB4 only used to log.

I'm shocked that I was was hitting 17psi of boost and a 0.9 avg ign, on 91 octane!

AFR still looking nice and safe
http://www.datazap.me/u/sc67065/stre...=1-2-4-5-12-18

17 psi on 91 octane? Jesus. Hope your motor doesn't kaboom.

[ocN55]

Originally Posted by Liquidpaper

17 psi on 91 octane? Jesus. Hope your motor doesn't kaboom.

I've ran 17 psi quite a bit before but with E85 mix.
I was just surprised to see the ECU target 16-17psi on its own on such low octane fuel. My AFRs are still on the richer side at low 12, my motor should be on a good path

[Bmw doubles]

You good at 17. Jb4s map 5 push as much as 15 psi on 91oct.

[ocN55]

Originally Posted by ROBNYC

ocN55 i looked at the log and the highest I see is 14 psi
I doubt the ECU Flash is making you push 17 psi lol since supposedly thats a current flash limit with the stock tmap sensor , correct me if im wrong

Look between 3-4k

[Anthony235]

Originally Posted by ocN55

Did a log today with the flash tune and 91 octane, JB4 only used to log.

I'm shocked that I was was hitting 17psi of boost and a 0.9 avg ign, on 91 octane!

AFR still looking nice and safe
http://www.datazap.me/u/sc67065/stre...=1-2-4-5-12-18

Not sure if the JB4 logs read differently with ECU flash, but if the logs are accurate then you have some issues with your timing.

You're running pretty rich for the N55 platform too.

That timing would make me nervous. It would be even more pronounced in higher gears.

FPL and FPH look good though.

Just my opinion based on my limited experience with tuning my JB4.

[Anthony235]

Originally Posted by ROBNYC

ocN55 i looked at the log and the highest I see is 14 psi
I doubt the ECU Flash is making you push 17 psi lol since supposedly thats a current flash limit with the stock tmap sensor , correct me if im wrong

I believe the stock tmap sensor is limited to 20psi, but you're right he's only hitting like 14psi max.

[Anthony235]

Originally Posted by ocN55

Look between 3-4k

Yes, you get close to 17psi for a bit at a very low rpm, but quickly taper down to 13-14psi.

I would adjust the boost table to hit it a little later and longer. Just me though.

Edit: after you get your timing issue sorted that is.

[ocN55]

Originally Posted by Anthony235

Yes, you get close to 17psi for a bit at a very low rpm, but quickly taper down to 13-14psi.

I would adjust the boost table to hit it a little later and longer. Just me though.


Edit: after you get your timing issue sorted that is.

You can't really adjust boost per se on a flash. The ECU decides how much it wants to boost depending on the torque being asked to put out. This amount boost is quite impressive I think for CA 91 octane. Also you're right about stock TMAP, its good for 20psi.

I'll be hitting more boost soon with some E85 tuning. Hope to be at 407/475 again.
Here's what an E40 log looks like if you're curious. I'm having major HPFP issues running the car like this though and it's too lean for me. I'll be getting a new flash to help accommodate for this boost curve and fuel. This is the only log where my HPFP barely got by.
http://www.datazap.me/u/sc67065/log-...a=1-2-4-5-9-10

Originally Posted by Anthony235

Not sure if the JB4 logs read differently with ECU flash, but if the logs are accurate then you have some issues with your timing.

You're running pretty rich for the N55 platform too.

That timing would make me nervous. It would be even more pronounced in higher gears.

FPL and FPH look good though.

Just my opinion based on my limited experience with tuning my JB4.

Hm... What do you think is wrong with timing? I'll have to look into it more myself. My avg ign retard is at the lowest it's ever been at 0.9. The FPL parameter is meaningless on F series N55, those values should be arbitrary.
Also I prefer to run my car the richer side.

Edit:
I think I see what you mean with timing. I guess that's what happens when one of plugs for valvetronic comes loose lol

[Anthony235]

Originally Posted by ocN55

You can't really adjust boost per se on a flash. The ECU decides how much it wants to boost depending on the torque being asked to put out. This amount boost is quite impressive I think for CA 91 octane. Also you're right about stock TMAP, its good for 20psi.

I'll be hitting more boost soon with some E85 tuning. Hope to be at 407/475 again.
Here's what an E40 log looks like if you're curious. I'm having major HPFP issues running the car like this though and it's too lean for me. I'll be getting a new flash to help accommodate for this boost curve and fuel. This is the only log where my HPFP barely got by.
http://www.datazap.me/u/sc67065/log-...a=1-2-4-5-9-10


Hm... What do you think is wrong with timing? I'll have to look into it more myself. My avg ign retard is at the lowest it's ever been at 0.9. The FPL parameter is meaningless on F series N55, those values should be arbitrary.
Also I prefer to run my car the richer side.

Edit:
I think I see what you mean with timing. I guess that's what happens when one of plugs for valvetronic comes loose lol

You can't adjust boost with JB4 stacked on it?

I've read the same thing about the FPL and N55. There does seem to be some correlation though, because I see it change as expected when I adjust my boost/FOL. Anyone know?

Your timing looks much better in that last log. Yes, your FPH is at the limit it appears. I would lower your ethanol a little.


Really you should log in 4th or even 5th. I think 5th is the best.

Short <3rd gear runs can hide a lot of possible issues.

Just my opinions. I'm still learning Jb4.