[Boostin335]

Originally Posted by TXSailor

off the cobb tuning dyno database for all t see...

Are you selling your Jb3?

[Proper Motion LLC]

Originally Posted by TXSailor

off the cobb tuning dyno database for all t see...

Looks like a bit less taper with Cobb too.

What is Cobb doing differently than JB3 to allow higher boost? More fuel? Timing?

[Clap135]

Originally Posted by Rysandro

Looks like a bit less taper with Cobb too.

What is Cobb doing differently than JB3 to allow higher boost? More fuel? Timing?

It actually controls timing and fuel the way it should be controlled.

[packinDSS]

Originally Posted by Rysandro

Looks like a bit less taper with Cobb too.

What is Cobb doing differently than JB3 to allow higher boost? More fuel? Timing?

Full control over the dme?

[onesuperboi]

The boost on the COBB tune looks really solid. The JB3 boost looks similar to stock.

[Boostin335]

Originally Posted by Rysandro

Looks like a bit less taper with Cobb too.

What is Cobb doing differently than JB3 to allow higher boost? More fuel? Timing?

Wow at 6500 rpm the cobb makes about 40whp more (330 to 290) and even more importantly makes roughly 40 whp more (340 to 300) at 5000 rpm..

[Mike@N54Tuning.com]

Originally Posted by Boostin335

Wow at 6500 rpm the cobb makes about 40whp more (330 to 290)

Yes because the JB3 is at around 10.5 PSI while the COBB is at around 13-13.5PSI

Mike

[Bagelfast]

Not a good comparison, looking forward to a more independent testing with more equal testing. Worthless dyno comparison IMHO.

[Boostin335]

Originally Posted by Mike@N54Tuning.com

Yes because the JB3 is at around 10.5 PSI while the COBB is at around 13-13.5PSI

Mike

But isn't that the choice of the "tuner" to run the boost stronger at higher rpm? 14.8 vs 13.3 at their respective best then 13.25 on cobb and 10.5 on jb3.

14.8 - 13.25 = 1.55 loss at 5k+

13.3 - 10.8 = 2.5 loss at 5k+

So the jb loses an average of 1 psi more? Why is that? and if we are talking 1 psi, why is the amount roughly 40whp?

[acj75]

Good info, Joe. Thx for posting!

[Bagelfast]

Originally Posted by Boostin335

But isn't that the choice to run the boost stronger at higher rpm? 14.8 vs 13.3 at their respective best then 13.25 on cobb and 10.5 on jb3.

14.8 - 13.25 = 1.55 loss at 5k+

13.3 - 10.8 = 2.5 loss at 5k+

So the jb loses an average of 1 psi more? Why is that? and if we are talking 1 psi, why is the amount roughly 40whp?

I think this goes for both the V5 and JB3/JB4 that taper is adjustable, so nothing to compare here, COBB is running a agressive boost on a stock car to show off there work and on map7 the taper is less with more boost.
Map5 is a mild map, not really agressive.

[enrita]

Originally Posted by Boostin335

But isn't that the choice to run the boost stronger at higher rpm? 14.8 vs 13.3 at their respective best then 13.25 on cobb and 10.5 on jb3.

14.8 - 13.25 = 1.55 loss at 5k+

13.3 - 10.8 = 2.5 loss at 5k+

So the jb loses an average of 1 psi more? Why is that? and if we are talking 1 psi, why is the amount roughly 40whp?

Cobb has probably more timings as well thats why the added power but looks like a lot of boost for a stock car. considering the crappy IC heatsoak would come really fast especially on high gears.

[Mike@N54Tuning.com]

Originally Posted by 1LUMI335

I think this goes for both the V5 and JB3/JB4 that taper is adjustable, so nothing to compare here, COBB is running a agressive boost on a stock car to show off there work and on map7 the taper is less with more boost.
Map5 is a mild map, not really agressive.

With the COBB you're looking at over 8PSI over stock boost (13-13.5 versus 5PSI) at redline on a pretty much stock car, while the JB3 Map5 is doing about 5-5.5 PSI over stock boost. Map5 is a mild map (93octane) meant for pretty much stock cars so there is plenty of taper there. Map up and boost increases and taper reduces.

Pushing 15PSI peak with very little taper is not what I would really call stage1. Its pretty aggressive if its meant to be on cars with no supporting mods.

Mike

[Proper Motion LLC]

Originally Posted by Clap135

It actually controls timing and fuel the way it should be controlled.

So Procede V5 autotunes N54 cars with DCI only to similar boost levels as Cobb?

[boom]

I'd never push my car to 15psi stock. Those that choose to may take comfort from a claimed richer A/F ratio. I haven't seen a graph that includes it yet but iirc they reported 11.8 across the range. In that case one could argue that 15 psi at 11.8 is safer than 13 psi at 13.0...

[Jeff@TopGearSolutions]

A Stock or DCI car on the procede will probably end up in the 13 PSI range, but it wont have 11 AFR. Its likely it may have some ignition correction too.

Cobb running 15 PSI might not be too big of deal considering the high 11 AFR.

It would be interesting to note ignition differences between the too.

Some people feel a little less ignition on this car and little more boost goes a little farther on the power department, while some others tend to like their ignition happy and their boost lower.

Different strokes for different folks.

[tscdennab]

I really think Cobb is measuring the EGTs at these boost levels. Higher numbers for the sake of marketing can fool many but with stock intercooler and downpipes things can be really unsafe as far as what's happening inside the engine. Any flash tuner could crank up the boost/timing/etc. at these boost levels but this doesn't mean it's safe on the short/mid/long term.

[phil_]

Was anything done to the AP to get the XI flash to work. Or it just works and it's the same as the 335i flash?

[Boostin335]

I know some people are worried... but a company like cobb with their reputation.. I don't think would go over limits and ruin their name with blown engines, fried ecus etc.

[UltraRacer13]

[QUOTE=phil_;8646813]Was anything done to the AP to get the XI flash to work. Or it just works and it's the same as the 335i flash?[/QUOTE

Dont know for sure but they dumped my ecu yesterday to prep for today. I

[Mikey_Bo0sts]

Originally Posted by 1LUMI335

Lookin at how hard COBB is pushing there stag1, you would have to be on Map7 on JB3to match up.

Map 7 would be considered stage 2 for Cobb , since it requiers mods, wow very impressed with stage 1 Cobb

[COBB Tuning]

Originally Posted by boom

I'd never push my car to 15psi stock. Those that choose to may take comfort from a claimed richer A/F ratio. I haven't seen a graph that includes it yet but iirc they reported 11.8 across the range. In that case one could argue that 15 psi at 11.8 is safer than 13 psi at 13.0...

If you go to http://cobbtuning.com/dyno you can choose any car using the "Car Chooser" and select a run to view the graph. There are check boxes to view AFR on any run.

This is a pretty big database, so in addition to the growing number of BMWs that have been dynoed, you can see many of the other makes and models of customers that have hit the rollers.

The really cool thing is it gives you graphs of multiple cars simultaneously, so compare power outputs of the same models with the same mods, same models with different mods, manufacturer against manufacturer, etc. It's a pretty cool tool.

Gary