New MazdaManiac BASE Calibrations
04-11-2009, 07:38 AM
#1202
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I believe it would be possible to solve a launch control, but not as it works now with the AP. Right now its tuning for perfection, launch control is a totally different mode that works a different way (keeping the revs at 4200 even if the tires start slipping or the load increasing)
The reason I say it can be done is because the AP can reprogram the ECU and therefore a new piece of code could be introduced.
The current rev-limiter change is 9000 changed to 10000, always. It is changed by reflashing the ECU, and I don't think you want to reflash in mid-launch. So my educated guess is: No it cannot be done as everything works now.
The reason I say it can be done is because the AP can reprogram the ECU and therefore a new piece of code could be introduced.
The current rev-limiter change is 9000 changed to 10000, always. It is changed by reflashing the ECU, and I don't think you want to reflash in mid-launch. So my educated guess is: No it cannot be done as everything works now.
04-11-2009, 12:14 PM
#1204
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And that's the reason a launch control program always beats a human off the line. It can maintain proper power level with the perfect amount of slip (i think its around 10%) until the car is up to speed and then go full force.
That's how Nissan GTR can put down such incredible 0-60 times. I think the M3 E46 CSL with DSG gearbox also has this ability.
04-11-2009, 02:48 PM
#1205
Launch Control via the AP
(BTW, these posts should probably be moved to the general accessport discussion thread)
As PerSmitt mentioned, the point of LC is to modulate throttle based on a few important variables: engine load, RPM, wheel slip, and instantaneous acceleration. This is what a human does during a drag launch, it's just that a computer can do it much faster and more accurately, and can have a programmed "map" of those variables for the entire sequence from initial clutch engagement through completion of engagement. As far as the AP goes, we know the ECU receives or calculates those necessary data, so in theory it should be possible, although the data rate must be fast enough.
However, don't forget that the ECU would have to perform a feedback function in which these data are used to modulate throttle application. This does NOT occur in normal driving. In normal driving you supply the throttle and the computer reacts accordingly, there is no feedback back to throttle.
So- what is the only case when the ECU does do this??? CRUISE CONTROL.
In short, I think it would be theoretically possible to hijack/duplicate/modify the cruise control code to turn it into a launch control function, which could be accessed and turned on/off with the AccessPort. The driver would have to manually release the clutch in a particular fashion, but the computer could modulate throttle perfectly based on RPM, wheelspin, speed, etc. I'm sure this would be very difficult to set up and perfect, but if anyone can do it, Jeff and/or Cobb can. I'd be interested to see what MM thinks of all this.
I am not sure, but I think this would not be a problem- suppose the cruise control code was modified and used for this. As soon as someone reached Wide Open Throttle and full clutch engagement in 1st gear, the LC system could turn off just as cleanly as the cruise control system turns off when you tap on the brake, you instantly revert back to normal driving input/output. The accessport re-flashes the entire ECU code; as long as this duplicate function code was included, it could be run simultaneously and the LC operations could simply disappear by the end of 1st gear.
As PerSmitt mentioned, the point of LC is to modulate throttle based on a few important variables: engine load, RPM, wheel slip, and instantaneous acceleration. This is what a human does during a drag launch, it's just that a computer can do it much faster and more accurately, and can have a programmed "map" of those variables for the entire sequence from initial clutch engagement through completion of engagement. As far as the AP goes, we know the ECU receives or calculates those necessary data, so in theory it should be possible, although the data rate must be fast enough.
However, don't forget that the ECU would have to perform a feedback function in which these data are used to modulate throttle application. This does NOT occur in normal driving. In normal driving you supply the throttle and the computer reacts accordingly, there is no feedback back to throttle.
So- what is the only case when the ECU does do this??? CRUISE CONTROL.
In short, I think it would be theoretically possible to hijack/duplicate/modify the cruise control code to turn it into a launch control function, which could be accessed and turned on/off with the AccessPort. The driver would have to manually release the clutch in a particular fashion, but the computer could modulate throttle perfectly based on RPM, wheelspin, speed, etc. I'm sure this would be very difficult to set up and perfect, but if anyone can do it, Jeff and/or Cobb can. I'd be interested to see what MM thinks of all this.
I am not sure, but I think this would not be a problem- suppose the cruise control code was modified and used for this. As soon as someone reached Wide Open Throttle and full clutch engagement in 1st gear, the LC system could turn off just as cleanly as the cruise control system turns off when you tap on the brake, you instantly revert back to normal driving input/output. The accessport re-flashes the entire ECU code; as long as this duplicate function code was included, it could be run simultaneously and the LC operations could simply disappear by the end of 1st gear.
Last edited by elysium19; 04-11-2009 at 03:04 PM.
04-12-2009, 12:45 AM
#1206
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I am not sure, but I think this would not be a problem- suppose the cruise control code was modified and used for this. As soon as someone reached Wide Open Throttle and full clutch engagement in 1st gear, the LC system could turn off just as cleanly as the cruise control system turns off when you tap on the brake, you instantly revert back to normal driving input/output. The accessport re-flashes the entire ECU code; as long as this duplicate function code was included, it could be run simultaneously and the LC operations could simply disappear by the end of 1st gear.
I'm going to be silent on this subject now and not spam this thread further.
04-12-2009, 06:41 AM
#1208
04-12-2009, 12:31 PM
#1212
04-12-2009, 11:56 PM
#1213
MAke sure you send it to jeff at mazdamaniac.com. If you are sending it to his AP email account it is probably getting auto deleted.
Last edited by DarthRX8; 04-13-2009 at 06:20 AM.
04-13-2009, 12:35 AM
#1214
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I'm not sure of the exact language but my understanding is once you're past the 6 month tuning service period any additional tuning would require a fee.
There is a link to pay that feee via http://www.mazdamaniac.com/cobb/accessport.htm
In preparation for getting any new tunes, make sure you're accessport is using the most up to date firmware as well.
Last edited by Flashwing; 04-13-2009 at 02:36 AM. Reason: edited out email
04-13-2009, 01:17 AM
#1215
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People, people... type emails like ap [at] mazdamaniac [dot] com
Otherwise spambots will pick them up and give Hund an even more severe workload. The Hund will probably have enough with us spamming it
Otherwise spambots will pick them up and give Hund an even more severe workload. The Hund will probably have enough with us spamming it
04-13-2009, 02:37 AM
#1216
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04-13-2009, 09:38 PM
#1218
I'm not sure of the exact language but my understanding is once you're past the 6 month tuning service period any additional tuning would require a fee.
There is a link to pay that feee via http://www.mazdamaniac.com/cobb/accessport.htm
There is a link to pay that feee via http://www.mazdamaniac.com/cobb/accessport.htm
04-13-2009, 11:09 PM
#1221
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You didn't specifiy how long you had the AP. If anything, I'd just email and check to see if you're still within the 6 month window or if you will have to purchase the service.
04-14-2009, 12:55 AM
#1223
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What about a hypothetical situation where a customer bought an AP from MM but had an unavoidable delay, of over one year before he finally got a turbo installed?
....and the customer bought one of the first units, even before MM put the six-month time limit in the contract?
....and the customer bought one of the first units, even before MM put the six-month time limit in the contract?
The flip side of that are these people who bought the AP and then stored their car for the winter and after 8 months are now demanding tunes or customers who otherwise never sent in logs and then turn up after almost a year demanding calibrations.
I'm more than positve that if the situation is reasonable there will be exceptions granted.
Here's a little tip for those of you who are planning on going turbo. Before you install your turbo be sure that you get your AP and download your base calibration. About 1/3 of the time the base calibration is very close to your final tune so the vehicle will still be driveable.
I see cases where people are installing their turbo which renders their vehicle useless until they get their AP. Use your head, think ahead and get all the stuff you need before being impulsive and installing the turbo in a hurry. Nobody is making you bolt that thing on right away.
Last edited by Flashwing; 04-14-2009 at 12:58 AM.
04-14-2009, 09:47 AM
#1224
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Right, but the part you're mising is that the service only lasts for 6 months after you purchase the accessport. If you're one of the first people to have bought the accessport that puts you close to a year if not longer since your purchase.
You didn't specifiy how long you had the AP. If anything, I'd just email and check to see if you're still within the 6 month window or if you will have to purchase the service.
You didn't specifiy how long you had the AP. If anything, I'd just email and check to see if you're still within the 6 month window or if you will have to purchase the service.
Well, wait a second now. Just a note, I'm one of those "patient" guys - I have no reason not to wait for my tune, haha. No rush here.
However: The 6-month rule would definitely not apply to most situations here, because the 6-month rule is in effect right next to the part that says a 48-hour turn around time. Until that part is true, the 6-month rule cannot be put into effect, as Jeff has stated before.
