I have an XEDE on the way along with a DP and CB (Stage Zero+).

The VishnuTuning map for Stage 0+ will work fine for playing around on the street. During Autocrosses I have to yank the XEDE's boost controller and let the stock ECU take charge. Does anybody have maps for this?

Also, would a map like that work alright when the XEDE is the boost contoller? I don't see why not, but just wondering.

Also, how hard is it to write you own maps? I have laptops and am willing to buy a GTEC if it helps. However, if I need a real dyno to do it, I'll just hire somebody who knows what they are doing.

TIA

 

question, why do you have to yank it? STU SCCA does not allow xede?

 

you need to pull the boost control wire for the Xede to be legal for STU or ESP.

 

The STU classification (and ESP) allow for a lot of modifications. However, controlling or modifing the boost pressure through any artificial means (MBC, ECU reflash, XEDE's boost controller, etC) is specifically forbidden. However, if the pressure increases b/c of a new intake, DP, High flow Cat and Cat back that is fine. You can also reflash the ECU w/ new timing and fuel maps or cause them to be changed through a piggy back and stay legal.

It does raise the question: why not switch to SM (Street Modified) where I can run nearly anything? I already purchased my '05 tires and they are not R compounds so I would have my @ss handed to me. In STU I might have a chance if I ever learn to drive.

So: anybody have a stock boost pressure map laying around that they would like to share?

 

That still isn't legal. The only legal way to run the xede in STU or ESP is to not hook up the boost control wire. Leave the stock ECU in charge of boost control.

And even then people may complain since it is known that that the xede can control boost. Kindof like leaving a nitrous bottle in your car and saying that you didn't spray. Nobody is going to believe you.

 

If the XEDE has a map for stock boost pressure (19Psi tappering to 16psi) and you disconnect the XEDE's boost soleniod and put back the stock hardware you are back to a legal configuration.

As for people complaining: I would worry about it more if I was actually a competitive driver. At this point I am smack in the center of the pack (seriously, I came in 54th out of 109 in the last event!). So frankly, I could probably hook up the soleniod, spray NOS and have a rocket pack on the car and nobody will care. However, I expect that to change this year after I get some more seat time and take a few classes.

But my question remains unanswered: Does anybody have a stock pressure map for a stage 0 w/ downpipe that they would share?

TIA

 

You'll be hard pressed to find a boost map in Absolute mode that mimics the stock ECU. Absolute mode takes the stock ECU's boost control characteristics out of the equation and relying on mechanical limitations of the turbo, etc. You can map one close to the way the stock ECU behaves, but it won't be the stock ECU controlling that. Change the Xede boost control mode to Intercept and leave all of the values in the cells at 0. This mode will allow the ECU boost signal to basically go through the Xede unaltered while retaining the stock ECU boost characteristics. The only other sure way is to not connect the boost control wire to the Xede.

 

oh, that problem....

you do not need to worry about that with the Xede because it is a piggyback ECU.

The references to keeping the stock boost map is for reprogramming the stock ECU. If you reprogrammed the stock ECU, then you have to keep the stock boost map. Your allowed changes in the boost curve due to mechanical other allowed modifications, including piggyback ECU's like the Xede. As you know, you can't modify the stock boost systems, and for Street Touring (STX and STU) they extended the rule to include the stock boost map on the ECU. With the Xede, your not modifing the stock boost map, its a piggyback ECU, it cannot modify the stock boost map. All you need to do is pull the wire for the boost control on the harness. At this point the Xede is only controlling the fuel and timing and your perfectly legal for Street Touring.

 

Why not install some kind of Y-adapter with a switch? That way you could quickly and easily eliminate xede boost control. Then the problem is the restrictor pill. You'll need to put it back in to keep from overboosting.

I wonder if there's someplace you could put that pill without having to dig out the airbox.

d

 

I know Vishnu created a "Canonball Run" reflash map for the ECU, a while ago, that only advanced ignition timing and leaned out the afr without changing the boost parameters. If only they would recreate/adapt the map for the Xede and have the map available for download. Better than pulling out wires IMHO, as the signal for the boost is unaltered.

 

You could run another piece of hose from the solnoid, up between the airbox and the battery. Then use a duel barbed fitting to connect that hose to the stock hose, which would normally go to the solnoid. Then when you need to put the pill back in, you would just have to disconnect the barbed fitting, put the pill in, and then put the hose back on the barbed fitting.

Much harder to explain, than actually do.

 

having the switch implies that you could hook it up to a secret switch in the cabin that would allow you to enable boost control during your run, then deactivate before impound.

Ahh yes... I keep forgetting about the pill. This would have to be swapped as well.

 

Swapping the restictor pill in and out looks like it will take a little thought to get right, but Dustin's solution sounds like the right direction. Maybe if Vishnu would ship me my XEDE I could spend the holiday working on it and come back with my solution

As for the specific map for STU it sounds like I don't have anything to worry about. Just run the Stage 0+DP map and the ECU and XEDE will figure it out when I pull the XEDE's boost controller. Sweet! Nearly a plug and play solution!

If only I had my shiny new XEDE here....or even better, a shiny new XEDE with V3 software!

mmmmmmmmm.....v3 software yummmmmm