[Mike@N54Tuning.com]

Originally Posted by klipseracer

There is no reason to bash JB3G4 for being like the procede. Although there have been lots of remarks in the past about how all the procede's features were useless and not necessary, put it behind us and look at BMS's decision to copycat all these features as a compliment... Options are good for everyone!

There will always be haters. FWIW having a downpipe fix, shift light, timing/iat in dash, etc, are all features pioneered by BMS. Unlike other systems the G4 also features 1k fueling resistors for true control over the air/fuel ratio.

Mike

[burningchicken]

you said the upgrade price is applicable to any jb3 sold in the past 2.5 years.. does that include ones that were purchased second hand? Wouldn't it be the same thing as if the original buyer wanted to upgrade it?

[Mike@N54Tuning.com]

Originally Posted by burningchicken

you said the upgrade price is applicable to any jb3 sold in the past 2.5 years.. does that include ones that were purchased second hand? Wouldn't it be the same thing as if the original buyer wanted to upgrade it?

Yes anybody can upgrade, used or original owner. Original owners who purchased a JB3 within 90 days of the launch of the G4 board will get a FREE G4 board upgrade.

Mike

[JhnR]

thats what i was confused about... oh boy it will clear codes, that means i can install my DCI and MAP5 =)

[klipseracer]

Originally Posted by Mike@N54Tuning.com

There will always be haters. FWIW having a downpipe fix, shift light, timing/iat in dash, etc, are all features pioneered by BMS. Unlike other systems the G4 also features 1k fueling resistors for true control over the air/fuel ratio.

Mike

Regardless of whom pioneered the features, people find them useful, contrary to the previous popular belief. Features are good! And, the price looks even better.

[BrianMN]

Originally Posted by Mike@N54Tuning.com

There will always be haters. FWIW having a downpipe fix, shift light, timing/iat in dash, etc, are all features pioneered by BMS. Unlike other systems the G4 also features 1k fueling resistors for true control over the air/fuel ratio.

Mike

I wouldn't be so quick to say that the 1k fueling resistors are 'right'. There was a very detailed 'debate' on *********** between Shiv and Terry regarding this.

The jist of it is that: Terry thinks the resistors in the Procede aren't 'enough' to give good enough AFR's...However Shiv states they do give proper AFR's...which can be seen by many peoples' datalogging.

In normal engines, more fuel can help to lower EGTs... however with DI engines there is a point where it can have an adverse effect of EGTs. So more fuel is not always the answer.

Either way, different strokes.

[Mike@N54Tuning.com]

Originally Posted by BrianMN

I wouldn't be so quick to say that the 1k fueling resistors are 'right'. There was a very detailed 'debate' on *********** between Shiv and Terry regarding this.

The jist of it is that: Terry thinks the resistors in the Procede aren't 'enough' to give good enough AFR's...However Shiv states they do give proper AFR's...which can be seen by many peoples' datalogging.

In normal engines, more fuel can help to lower EGTs... however with DI engines there is a point where it can have an adverse effect of EGTs. So more fuel is not always the answer.

Either way, different strokes.

There isn't much of a debate. It's better to be able to target as rich as a 10:1 air/fuel ratio with the piggyback if you want and dial in the perfect air/fuel in the software dynamically than to be limited to no richer than ~11.8:1 like you are with 4.7ks. Or worse yet have to resort to dumping meth to get a short term fuel trim bump for glory dynos. But like I said different strokes for different folks. It was just another example of the differences in the systems.

Mike

[ak335]

i still dnt understand why im stock

[Ilma]

Originally Posted by Mike@N54Tuning.com

There isn't much of a debate. It's better to be able to target as rich as a 10:1 air/fuel ratio with the piggyback if you want and dial in the perfect air/fuel in the software dynamically than to be limited to no richer than ~11.8:1 like you are with 4.7ks. Or worse yet have to resort to dumping meth to get a short term fuel trim bump for glory dynos. But like I said different strokes for different folks. It was just another example of the differences in the systems.

Mike

Good to know

So you are saying that a 10:1 ratio is better?

[Mike@N54Tuning.com]

Originally Posted by Ilma

Good to know

So you are saying that a 10:1 ratio is better?

The air/fuel ratio you're showing is not a true measurement, it's a calculation on top of a measurement, and concerningly inaccurate... 4.7k fueling resistors can give a maximum bias of .47ma, allowing around 13.5:1 in the midrange and 11.8:1 up top. 1k resistors give you a maximum bias range of 2.25ma, allowing up to 11:1 in the midrange and 10:1 up top. Of course the G4 can optimize it for you based on timing and EGT measurements. So it may decide 12.5:1 in the midrange is best, or 13.5:1, etc. But the point I was making is that the range is there.

Mike

[Ilma]

Originally Posted by Mike@N54Tuning.com

The air/fuel ratio you're showing is not a true measurement, it's a calculation on top of a measurement, and concerningly inaccurate...

That's what I was thinking too......doesn't seem accurate to me either.

Thanks Terry...errr Mike!

[ezatnova]

Great stuff!

[Calvin@Vishnu]

Originally Posted by Ilma

Good to know

So you are saying that a 10:1 ratio is better?

That is an old channel that reads is from the rear narrow band o2 sensor which isn't accurate much richer than stoich. The actual wideband CAN widewand AFR readings are displayed in what is currently the CAN Knock and CAN Coolant channels. Just an FYI

[merlinfe]

Doesn't the factory ECU "autotune" anyway?

I'm glad that things are progressing from a technological stand point on this car. All the tuners are doing a great job in advancing things so we can get the most out of our engines. Keep it up!