Launch Control Rev Speed - Configurable?
Evolved Member
Joined: Jan 2004
Posts: 613
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From: Burbank
Originally Posted by EVOtagger
is the clutch trigger wire that the XEDE taps from just an open/closed switch? I have been reading about a lot of people tripping the fuel cut by resting their foot on the clutch pedal in between shifts...
would it be possible/optimal to place a switch under the clutch pedal that the XEDE can run off of? So the LC will only engage when the clutch pedal is completely depressed...kind of like a full throttle nitrous switch
just an idea i was thinking of today...the only problem i can think of with this is, when you are staging and about to launch, i generally start to release the clutch slightly when the tree begins to drop down and fully engage the clutch at the final yellow...with a switch under the clutch i wouldnt be able to do this
would it be possible/optimal to place a switch under the clutch pedal that the XEDE can run off of? So the LC will only engage when the clutch pedal is completely depressed...kind of like a full throttle nitrous switch
just an idea i was thinking of today...the only problem i can think of with this is, when you are staging and about to launch, i generally start to release the clutch slightly when the tree begins to drop down and fully engage the clutch at the final yellow...with a switch under the clutch i wouldnt be able to do this
I would like this idea too. If you don't do a no lift shift past 6000, as soon as you go to shift, the fuel cut hits.
It's kind of disconcerting when shifting at 7700 rpm and seems to inhibit engine response on upshift.
Using the the second switch might delay or avoid the fuel cut.
There must be a reason they don't use it though...
Originally Posted by Jaylenospoolboy
I would like this idea too. If you don't do a no lift shift past 6000, as soon as you go to shift, the fuel cut hits.
It's kind of disconcerting when shifting at 7700 rpm and seems to inhibit engine response on upshift.
Using the the second switch might delay or avoid the fuel cut.
There must be a reason they don't use it though...
It's kind of disconcerting when shifting at 7700 rpm and seems to inhibit engine response on upshift.
Using the the second switch might delay or avoid the fuel cut.
There must be a reason they don't use it though...
If you want to take advantage of launch control, without no lift shift, run a momentary switch. One side of the normally open momentary switch would run to ground, the other side to the Launch control wire on the xede. (pin 1, black connector)
So you would hold the momentary switch at the line, launch, then drop the switch. Much like a line lock system.
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Joined: Jan 2004
Posts: 613
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From: Burbank
Originally Posted by Dustin@Vishnu
The reason we don't is because when performing a NLS, you want the fuel to cut the moment the clutch starts to go in. If you started cutting fuel when the clutch is all the way in, NLS wouldn't really work. Furthermore, when driving hard the clutch only goes about half way in most of the time.
If you want to take advantage of launch control, without no lift shift, run a momentary switch. One side of the normally open momentary switch would run to ground, the other side to the Launch control wire on the xede. (pin 1, black connector)
So you would hold the momentary switch at the line, launch, then drop the switch. Much like a line lock system.
If you want to take advantage of launch control, without no lift shift, run a momentary switch. One side of the normally open momentary switch would run to ground, the other side to the Launch control wire on the xede. (pin 1, black connector)
So you would hold the momentary switch at the line, launch, then drop the switch. Much like a line lock system.
I still want more seat time to really get the feel of it though. Might not want to change anything yet.
NLTS is not something you will want to disable......
I'm not sure I understand the problems you are running into.....I road race my evo almost every weekend. I use both LC and NLTS and I've have no problems upshifting or downshifting.
I think you probably just need to keep your foot off the clutch pedal.
I'm not sure I understand the problems you are running into.....I road race my evo almost every weekend. I use both LC and NLTS and I've have no problems upshifting or downshifting.
I think you probably just need to keep your foot off the clutch pedal.
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Joined: Jan 2004
Posts: 613
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From: Burbank
Originally Posted by EVIL_EV0
NLTS is not something you will want to disable......
I'm not sure I understand the problems you are running into.....I road race my evo almost every weekend. I use both LC and NLTS and I've have no problems upshifting or downshifting.
I think you probably just need to keep your foot off the clutch pedal.
I'm not sure I understand the problems you are running into.....I road race my evo almost every weekend. I use both LC and NLTS and I've have no problems upshifting or downshifting.
I think you probably just need to keep your foot off the clutch pedal.
1st gear clutch in rev to 6000 rpm where LC is activated.
Launch and run rpm up to 7700 rpm
Push in clutch with half lift on accelerator and shift to second.
As soon as I hit the clutch I feel the car slow and hear the fuel cut because I'm above 6000 rpm.
Let out clutch and boost is off by a split second and RPMs feel lower than normal.
I'll run it this way for a while, but I probably just need to get used to keeping my foot planted. I used to ride a motorcyle where I would fan the clutch and I know it's the same process. It just feels so un-natural right now. Like driving in the UK
Evolved Member
Joined: Jan 2004
Posts: 613
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From: Burbank
Originally Posted by Dustin@Vishnu
If you lift at all, it creates vacuum and the BOV opens, making NLS worthless. You MUST keep your foot planted in order to take advantage of NLS.
Ok, I guess I'll have to have faith!
Last edited by Jaylenospoolboy; Aug 19, 2005 at 02:48 PM.
Originally Posted by Dustin@Vishnu
I personally like -50,-75,-75,-75.
would that not make it alittle lean? maybe cause detonation? would a complete cut of fuel not be better? Just wondering if that would cause lean conditions like this? I currently have mine like this too, just trying it out, but I got to thinking....
Any cut greater than 20% is too much of a fuel deprivation to ignite any form of combustion, so a starting point of 50% cut is plenty safe. The 50-75% range just keeps a small amount of fuel in the cylinder to help combustion recovery when the LC deactivates.
- Steve
- Steve
