[ezatnova]

As the title says, I'm looking for a JB3 user who went from a stock car with pre-29.2 to then stock with 29.2 (and you can vouch for the change of lag and/or exhaust note change) and then now have the JB3. Any of you JB3 beta testers out there fit this bill? I'm sure a handful of possible-soon-to-be owners out there do, but I'm looking for feedback now, before it's on sale.

Specifically, what I want to learn is:

- How much does JB3 really eliminate the lag of 29.2 and make it perform like 27.4 "good old days"?

- Does JB3 revert the exhaust to sounding like it did before 29.2 (less drone, less popping/burble)?

I am really curious to hear of actual experience, as I can speculate either way. On the one hand, I think that a piggy would have a hard time "reversing the code" that is build into the background of the 29.2 update, which is causing this behavior. On the other, IMHO I attribute these 29.2 behavior changes vastly to waste gate duty cycle alterations (in 29.2 they are open much more at idle/cruise/light throttle). So, if JB3 directly impacts the wastegate duty cycles they could then, as a result, eliminate the lag and bring the exhaust noise back down to the lower levels, due to the fact that the gasses are passing through the turbo, rather than bypassing straight out the exhaust "unmuffled".

Thanks!

[dmboone25]

Originally Posted by ezatnova

As the title says, I'm looking for a JB3 user who went from a stock car with pre-29.2 to then stock with 29.2 (and you can vouch for the change of lag and/or exhaust note change) and then now have the JB3. Any of you JB3 beta testers out there fit this bill? I'm sure a handful of possible-soon-to-be owners out there do, but I'm looking for feedback now, before it's on sale.

Specifically, what I want to learn is:

- How much does JB3 really eliminate the lag of 29.2 and make it perform like 27.4 "good old days"?

- Does JB3 revert the exhaust to sounding like it did before 29.2 (less drone, less popping/burble)?

I am really curious to hear of actual experience, as I can speculate either way. On the one hand, I think that a piggy would have a hard time "reversing the code" that is build into the background of the 29.2 update, which is causing this behavior. On the other, IMHO I attribute these 29.2 behavior changes vastly to waste gate duty cycle alterations (in 29.2 they are open much more at idle/cruise/light throttle). So, if JB3 directly impacts the wastegate duty cycles they could then, as a result, eliminate the lag and bring the exhaust noise back down to the lower levels, due to the fact that the gasses are passing through the turbo, rather than bypassing straight out the exhaust "unmuffled".

Thanks!

+1 This is a great question.

[camaross305]

I'll be the beta tester LOL

[ezatnova]

Ha, me too.
Someone has to have this situation (I'd hope...for thorough beta testing's sake!).

I would speculate that Terry (and maybe Rixter) may know the specs on each beta tester's situation.

All kidding aside, BMS needs to get a JB3 in the hands of a 29.2 sufferer (who was previously non 29.2 and knows the problem issues well, as do I) to beta the results of running the tune.

[dmboone25]

Originally Posted by ezatnova

Ha, me too.
Someone has to have this situation (I'd hope...for thorough beta testing's sake!).

I would speculate that Terry (and maybe Rixter) may know the specs on each beta tester's situation.

All kidding aside, BMS needs to get a JB3 in the hands of a 29.2 sufferer (who was previously non 29.2 and knows the problem issues well, as do I) to beta the results of running the tune.

From what I have seen on various posts here and on n54Tech, it seems as though the lag is not there on cars with the JB3.

[GAaaAR]

Im still confused by whether MSD81 ecu cars have lag or not. From what i've heard, it seems to be a mix where some say they have it and some say they don't.

[slubu]

Originally Posted by GAaaAR

Im still confused by whether MSD81 ecu cars have lag or not. From what i've heard, it seems to be a mix where some say they have it and some say they don't.

I have MSD81 and my lag is what it is supposed to be...minimal. This was the case when I picked it up in Europe and when I got it back here. It was built 5/08. My stock MSD81 and the pre 29.2 2007 MSD80 I drove felt exactly the same lagwise.

[ezatnova]

Please don't derail this thread.

Looking for someone to talk to who had the conditions mentioned in post 1.

[vegasspeed]

good luck.

[E92_335]

yeah wow i hate the popping/burble sounds.. i can test for you if you'd like.. i just updated (bmw didn't even tell me) and those sounds are SO annoying. and the exhaust drones like a mofo

[slubu]

Originally Posted by ezatnova

Please don't derail this thread.

Looking for someone to talk to who had the conditions mentioned in post 1.

Ha, punk . It is actually a good question, I wonder what the result would be.

[FunRevn]

From what I understand from a conversation with Dustin. The system has to use the stock wastegate duty cycle and add to it. But because its 29.2 their are limits. I've driven 27.4 and 29.2 stock and with V2 with the 27.4 and 29.2 with V3. Hell I've even driven the above mentioned progmans with the SSTT.

They all take out a bit of the lag. The proceed and I would suspect the JB3 took out 70% of the poor exhaust sound and about 50% in the lag dept. But because its 29.2 you will never (tuner challenge) be able to get that low rpm ripping torque that is available to pre 29.2 cars without triggering flags.

That being said. The car I drove for several months, V3 29.2 was more than adequate. Actually for the first few days, without knowing it, I was driving on the low boost map because my buddy left the remote map switcher in the garage. High boost doomsday is more than enough for most and probably as high as you want to go with stock trans and the like.

I have noticed on several cars that its not just the new wastegate setup with 29.2 thats causing all the noise but checkout the exhaust flap. It should stay closed on startup and then as the exhaust warms open a bit and only after 2500 rpm opens completely. If it opens more than a touch below 2500rpm you will get a drown. I have 29.2 stock and this is a situation I am working with the dealer on now. The car failed the test plan and the tech told me that vacuum levels are not correct. The vacuum is electric motor driven. I think its another 29.2 issue. They are waiting for the PUMA response to tell them what to do.

[ezatnova]

Originally Posted by E92_335

yeah wow i hate the popping/burble sounds.. i can test for you if you'd like.. i just updated (bmw didn't even tell me) and those sounds are SO annoying. and the exhaust drones like a mofo

And you are running Magnaflows, not stock mufflers, correct? If so, you know exactly what I'm talking about, because I have the BMW Performance mufflers and it's just a little too much with the 29.2 loudness. I sure bet they sound sweet the way the car was before 29.2. There's just no way BMW engineers would develop the Perf Exh to be as poppy as mine is now, so I'm sure they tested it on a pre 29.2 car when developing it.

Anyway, when you say "I can test it for you..." what do you mean? Do you have a beta JB3? Or do you mean you'll just be GETTING a JB3 when they are released?

I really want a JB3, but, if Dinan is the only tried and true way to get me back to 27.4 lag free and exhaust noise free performance, then so be it.

[ezatnova]

Originally Posted by FunRevn

From what I understand from a conversation with Dustin. The system has to use the stock wastegate duty cycle and add to it. But because its 29.2 their are limits.

This makes perfect sense, and is basically what I was "afraid of" with the piggies.

Originally Posted by FunRevn

They all take out a bit of the lag. The proceed and I would suspect the JB3 took out 70% of the poor exhaust sound and about 50% in the lag dept.

I'm VERY happy to hear that, and would love if you could expand in detail about your impressions of what went away, as far as "poor exhaust sound"...the burbles on decel? the drone under light load in low gears? the volume at cold startup?

Originally Posted by FunRevn

But because its 29.2 you will never (tuner challenge) be able to get that low rpm ripping torque that is available to pre 29.2 cars without triggering flags.

+1 on the toona challenge Honestly, this is where Conforti's Shark could crush the competition. Like Dinan, anyone using his Edit could flat out use 27.4 code to build on. No laggy No droney

Originally Posted by FunRevn

I have noticed on several cars that its not just the new wastegate setup with 29.2 thats causing all the noise but checkout the exhaust flap. It should stay closed on startup and then as the exhaust warms open a bit and only after 2500 rpm opens completely. If it opens more than a touch below 2500rpm you will get a drown. I have 29.2 stock and this is a situation I am working with the dealer on now. The car failed the test plan and the tech told me that vacuum levels are not correct. The vacuum is electric motor driven. I think its another 29.2 issue. They are waiting for the PUMA response to tell them what to do.

You are correct with all of this. Now, imagine how off the exhaust noise sounds with a performance exhaust (like BMW's OWN Performance Exhaust that I have) where it has no vacuum flap and you just plug that line. POP POP DRONE! Anyway, yes, even with the stock exhaust flap, 29.2 butchered how the system works, and it sounds way different than it did before the cars got updated.

Last, unrelated to your post specifically, I DID throw out this question to Rick (Rixeffects) and Terry, but haven't heard back. Hopefully they can either PM me back or chime in here with solid info.

[Leroi]

LYLE LUKAS

Originally Posted by LYLE LUKAS

The Turbo's spool whenever you deliver your foot the pedal, this Tune deletes the lag issues with V81 and 29.2...........
Yes i have both V81 and 29.2 in my car.........MMy car is also completely stock other than the JB3, until today...... (afe intake)

Hope this is true.

[ezatnova]

Originally Posted by Leroi

LYLE LUKAS



Hope this is true.

Thanks. I actually PM's Lyle in hopes that he would fit the bill.. BUT, his car came with V81...so he did NOT follow the path of pre 29.2 -> 29.2 -> 29.2 + JB3. I really want to hear from someone who knows what the car USED to feel like!

[ezatnova]

Still obviously hoping to hear from a qualifying individual (again, I'm SHOCKED if BMS didn't give a JB3 to a V80 29.2 sufferer to beta test it). However, I did learn that, unfortunately, JB3 will likely not solve the annoying exhaust sound issues, as it does not alter waste gate duty cycles.
Still, it'll be best to tell first hand from someone (or myself), but it doesn't look promising on that front. Dinan or a Conforti may be the only options for truely getting the sound and lag back to where they used to be.

[RedGT3]

I will be installing JB3 next week my car is v80 with 29.2..

[mistermojorizin]

Originally Posted by fll335

I will be installing JB3 next week my car is v80 with 29.2..

do you currently experience the turbo lag?

[RedGT3]

Originally Posted by mistermojorizin

do you currently experience the turbo lag?

Not really but I have Jb2 w/o the looms. To the OP I dont think JB3 is going to make any difference in sound or lag just bacuse the low end duty cycles are unchanged.

[ezatnova]

Originally Posted by fll335

Not really but I have Jb2 w/o the looms. To the OP I dont think JB3 is going to make any difference in sound or lag just bacuse the low end duty cycles are unchanged.

Would you mind running the car for a little bit with no tune in between, to feel "true 29.2"?

I agree with your statement that noise and lag won't be fully cured by JB3 due to low end duty cycles (actually ALL duty cycles) being unchanged.
That begs the question, how do you not have lag with the JB2 then? Does JB2(sans looms) change duty cycles??

[ezatnova]

Bump for my question above to fll335, and to try and find someone fitting the bill I'm asking for!