[Former_Boosted_IS]

Originally Posted by bmwzimmer

Fuel Trims? How does one clear that?
Mileage and fuel consumption hasn't changed too much for me. Probably went from 20mpg on average to mid 19's.

From what I read, the XEDE and Procedes are more difficult to detect after uninstall since it fools the ECU into thinking the various inputs/outputs/etc.. are normal. The TT's and JB's are supposedly easy to detect if BMW pulled your ECU for testing.

You must understand that we are in the "smart ecu" and "drive by wire" era. (FYI drive by wire means the ecu controls the butterfly on your throttle body rather than your foot pressing the gas). The new ecu's on cars carry long term and short term fuel trim adjustment. What this means is your ecu will adjust the amount of fuel your car consumes to maximize fuel economy. Now with the increased boost from these piggyback ecu's, your long term fuel trims will adjust so that you get 100% of your throttle.

An example... an old person who never floors the car will have fuel trims adjusting the throttle to lets say 80%. That means that even if you floor the car, you are only getting 80% of your throttle max. Since the piggy is adding fuel and boost, more than likely your long term fuel trims are adjusting the ecu to give you 100% of your throttle when you floor the car. Most people will simply floor the car a lot after an ecu reset to make sure you are getting the fuel throttle. This is life in a drive by wire car.

With this said, that doesn't indicate you have a piggyback to the dealer. It does say that you drive your car hard and floor it a lot though and that cannot void a warranty, but may make them curious.

To reset the long term fuel trims, you need to disconnect the black cable on the battery for around 1-5 minutes and that will fully reset the ecu. At least that is how it worked on my IS300.

[jon@themshop]

Disconnecting the battery on modern BMWs will not reset or clear faults and/or adaptations.

[Former_Boosted_IS]

Originally Posted by jon@themshop

Disconnecting the battery on modern BMWs will not reset or clear faults and/or adaptations.

Even if you keep it disconnected long enough that any residual current in the system is drained. In the IS300 community we would hold the break pedal down after disconnecting the ecu to reset it and clear the long fuel trims.

[bimmerlex]

Originally Posted by jon@themshop

Disconnecting the battery on modern BMWs will not reset or clear faults and/or adaptations.

Can you clear it with ODBII code reader?

[jon@themshop]

Originally Posted by bimmerlex

Can you clear it with ODBII code reader?

You can clear faults but depending on what reader you have there can be an option to clear adaptations.

[BMW_TT]

Plan to dyno soon?

[E90Russ]

Originally Posted by Revlis

265/30-19 is 2" more rubber than 255/35-18???

No no no Bro, more like 10 mils +/- depending on brand of tire... Really Really.

2"s of additional width would have you at about a 335/25-19. Versus OEM

Congrats on the new power...

You're thinking per tire. I'm talking about tires (plural). I have ~ an extra inch per tire... ~ 2 inches total.

[jon@themshop]

BTW, whenever adaptations are reset the VANOS, ignition, fuel trim, fuel injection timing, and probably boost, are set to make the least amount of power. This means lean fuel trims and retarded cam, ignition, and fuel timing. Of course this quickly goes away and starts adapting when you start driving and do a couple of drive cycles.

[remydlc]

Originally Posted by 533ogetnom

becuase the JB is literally made out of 50 cents worth of radioshack resistors

so the real question is why is it so expensive


terry is sure as hell turning one hell of a profit a 3,000% profit

At least his customers are getting what they bought on time, I bought a PROcede almost 2 weeks ago and I haven't even get the shipping notice :mad:

That means a lot to me as a consumer, forget about product x is better than y, at the end the customer experiences is what counts and for what I can tell, customer are not getting way less with JB.

[E90Russ]

Originally Posted by BMW_TT

Plan to dyno soon?

I'd like to. I'll probably end up going to the drag strip first though, a lot more fun.

What I'm really curious to see is how well the JB2 will respond to other mods. There have been some other posts on this forum of mods like down pipes actually hurting performance or only providing negligible gains when combined with a processor based piggy back but providing large gains when used with the stock DME. I wonder if the same will hold true with one of these more simple devices that make more use of the factory DME capabilities.

Time will tell!

[silvrevo]

Congrats Russ.

Enjoy your LIMP free , Overly simplistic, Over priced , Plastic thingy.

O, and it actually gets the job done!

Ill have mine Friday!

Cant wiat.

Enjoy your new found power, and may it not get too common too soon!

[bnj]

Originally Posted by E90Russ

I'd like to. I'll probably end up going to the drag strip first though, a lot more fun.

What I'm really curious to see is how well the JB2 will respond to other mods. There have been some other posts on this forum of mods like down pipes actually hurting performance or only providing negligible gains when combined with a processor based piggy back but providing large gains when used with the stock DME. I wonder if the same will hold true with one of these more simple devices that make more use of the factory DME capabilities.

Time will tell!

I don't think using the factory DME capabilities would be any major factor. However, using less boost could possibly leave some more space to benefit from the DPs. The general problem with not getting a full gain of DPs is that the turbos are maxed out. I don't think that there would be major differences in the various ECU tunings, but it would be nice to see.

[Beer Goggles]

None of the tuning options will allow you to tune for other mods that affect air or fuel changes in the system.

[E90Russ]

Originally Posted by bnj

I don't think using the factory DME capabilities would be any major factor. However, using less boost could possibly leave some more space to benefit from the DPs. The general problem with not getting a full gain of DPs is that the turbos are maxed out. I don't think that there would be major differences in the various ECU tunings, but it would be nice to see.

Ahh, that makes sense. So unless you had bigger turbos there's no use in adding other mods? Perhaps the turbos would spool up faster?

Thanks!

[E90Russ]

Originally Posted by silvrevo

Congrats Russ.

Enjoy your LIMP free , Overly simplistic, Over priced , Plastic thingy.

O, and it actually gets the job done!

Ill have mine Friday!

Cant wiat.

Enjoy your new found power, and may it not get too common too soon!

Sweet man, you're going to love it!

[bnj]

The spool would be a snap with upgraded DPs. Use of other mods depends on what you consider useful. The price per hp takes a huge leap from JB2 onward in any case.

[Boostin335]

Originally Posted by bnj

The spool would be a snap with upgraded DPs. Use of other mods depends on what you consider useful. The price per hp takes a huge leap from JB2 onward in any case.

With a jb2 and dps.. would you feel the difference with dps? Supposedly the spool of the turbo is greatly improved. $650 for catless URs.

[E90Russ]

Yeah, I'm wondering if after the chip everything else sort of becomes cosmetic, with only minor performance gains. Although some may be in the position to do so, I really don't see myself upgrading the engine internals or the turbos to make more power.

[f30er]

Congrats on the purchase!! I'm still considering it but am probably just gonna pull the plug and buy it soon....I just saw ur in Phoenix too, are you gonna head to Speedworld or Firebird? If you go to Speedworld lemme know, i'd love to see the difference over stock....maybe even feel it if u don't mind me ridin shotgun for a quick cruise....

[E90Russ]

Originally Posted by zameergill

Congrats on the purchase!! I'm still considering it but am probably just gonna pull the plug and buy it soon....I just saw ur in Phoenix too, are you gonna head to Speedworld or Firebird? If you go to Speedworld lemme know, i'd love to see the difference over stock....maybe even feel it if u don't mind me ridin shotgun for a quick cruise....

I'll probably head out to Firebird, it's like 10 minutes from my house and they usually are open on Friday nights. I'll PM you before I go.

[Slke46]

Congrats on this mod... looks like you've attained some good power.

On another note, by hiding the boost the turbo's are spooling up, would cause the engine internals and turbo over worked causing damage??? The bearings on those small turbos would fail??? Without internal upgrades and increased compression the engine would go kaput? Unless its within the right range... Thats a huge risk, but nothing has happened yet? I guess...

[E90Russ]

Originally Posted by Slke46

Congrats on this mod... looks like you've attained some good power.

On another note by hiding the boost the turbo's are spooling up isn't the engine internals and turbo being over worked causing damage??? Without internal upgrades and increased compression the engine would go kaput? Unless is within the right range...

It raises the boost by 2 psi, and adds extra fuel to compensate. I believe it's well within the capabilities of the stock engine internals to handle, but of course it is a risk I had to assume when doing this mod.