[Taskmaster]

Aren't the JBs piggy back units that can't even control variable valve timing? What makes them more valuable than a real tune?

[derryck]

Value is subjective but piggybacks (JB, Procede, etc.) are easy to install and offer nice features like code reading/clearing, valet mode, easy map switching and they're generally much cheaper.

[JStang]

Originally Posted by derryck

Value is subjective but piggybacks (JB, Procede, etc.) are easy to install and offer nice features like code reading/clearing, valet mode, easy map switching and they're generally much cheaper.

Flash tuning offers the same with the exception of on the fly map switching.

[Myrder]

why not both?

[Dcara]

Originally Posted by Myrder

why not both?

How can u run both? Wouldn't the bj take over whatever tune you flash to the car.

[Jeff@TopGearSolutions]

Originally Posted by Dcara

How can u run both? Wouldn't the bj take over whatever tune you flash to the car.

Plenty of guys run two tunes. You need to change the parameters in the JB4 to accommodate for this as it doesn't come out of the box with that ability so to speak.

You may need to do a bit more research. 2 tunes is not really necessary for an average Joe anyway.

What are you goals with the vehicle, power and modifications?

[CHECKERED]

Originally Posted by Dcara

How can u run both? Wouldn't the bj take over whatever tune you flash to the car.

JB...not the other one...LOL

you can run both, it’s called stacking, there are setting in the JB4 interface that allows you to run both piggy and a flash tune (Originally only alpina but now can run with Cobb maps and their own BMS maps) to get the best of both worlds.

Piggyback controls; Boost + other features like Traction/Launch control, gauge hacking, code reading, data logging, meth integration, map switching onthe fly + auto tune for mods and octane

Flash controls; fueling and timing + other random features like speed delimit, Linear or exponential throttle

You won’t be able to get that much flexibility and that many features with just a piggy or just a Flash, so both are best

[Dcara]

That's good to know. I currently have the open flash table and am happy with the tune. I have catless dp, dci, chargepipe. Looking to get the jb4 for the wastegate rattle fix so I guess I would be ready to stack the tunes... You think I would be better off running the stacked tunes in my situation?

[CarAbuser]

Originally Posted by CHECKERED

JB...not the other one...LOL

you can run both, it’s called stacking, there are setting in a JB4 interface that allows you to run both piggy and a flash tune (Originally only alpina but now can run with Cobb maps and their own BMS maps) to get the best of both worlds.

Piggyback controls Boost + other features like gauge hacking, logging, map switching + auto tune
Flash Tune controls, fueling and timing.

Why would you let the JB manage the boost over a flash? Is it better in some respect?

[Taskmaster]

Originally Posted by Myrder

why not both?

You wouldn't need both. The only benefit of a piggy back that I see is map switching, which you can due with a tune if you have the device. And you don't have to splice wires.

[Dcara]

I thought jb4 was plug and play. Why would you need to splice wires?

Originally Posted by TheAxiom

You wouldn't need both. The only benefit of a piggy back that I see is map switching, which you can due with a tune if you have the device. And you don't have to splice wires.

[bradsm87]

There are tables you can change in your bin file using TunerPro to apply a rattle fix. I think it's called "WGDC Pre-Control A" from memory.

[Taskmaster]

Originally Posted by Dcara

I thought jb4 was plug and play. Why would you need to splice wires?

Ahhh, cool. I didn't know that.

[Dcara]

I thought there may be a way to do it, and have asked around but no one has been able to help me out. Any idea where I can find more info on that? If I know what to change and what values to try I would give it a shot.

Originally Posted by bradsm87

There are tables you can change in your bin file using TunerPro to apply a rattle fix. I think it's called "WGDC Pre-Control A" from memory.

[CHECKERED]

Originally Posted by CarAbuser

Why would you let the JB manage the boost over a flash? Is it better in some respect?

I’m not sure of the exact technical reason, but yes the piggyback does a better job at controlling the boost and WG cycle then a flash tuned DME, probably due to some limitations of the DME

[Taskmaster]

So which unit makes more power? I'd imagine a flash tune is more reliable and can be fine tuned in comparison to the Piggyback unit.

[PR3CI5N]

Originally Posted by TheAxiom

So which unit makes more power? I'd imagine a flash tune is more reliable and can be fine tuned in comparison to the Piggyback unit.

Do you have any performance mods besides what's listed in your signature? If not I wouldn't be too worried about stacking. Buy a JB4 and haul some ass. Once you get more mods like DP's, FMIC, chargepipe, inline pump then worry about flashing your DME. My buddy over the weekend made 419whp/426wtq on a Dynojet @EAS with only a JB4 G5 ISO on map 5, DCI and E40. For most people that's plenty of power but good luck getting as high of #'s as he did.

[Myrder]

Originally Posted by TheAxiom

You wouldn't need both. The only benefit of a piggy back that I see is map switching, which you can due with a tune if you have the device. And you don't have to splice wires.

Ummm.... do you have a 335i? Splice wires?

You can run a backend flash and JB4 all day. There are benefits to it.

[lukeperformance]

Originally Posted by TheAxiom

You wouldn't need both. The only benefit of a piggy back that I see is map switching, which you can due with a tune if you have the device. And you don't have to splice wires.

ROFL "Splice wires". This is NOT JDM forum.

[Taskmaster]

I'm still wondering why a Piggyback over a flash tune - better boost control?

[lukeperformance]

Originally Posted by TheAxiom

I'm still wondering why a Piggyback over a flash tune - better boost control?

Yes.

[Taskmaster]

Originally Posted by lukeperformance

Yes.

But no ability to fine tune ignition, and advance and retard cam timing.