FWIW as said earlier, this is just a stationary rev limiter, the reason its slower or faster really depends alot on how fast it cycles past the limit and cuts..

A TRUE Two step cycles between two engine speeds a few hundred RPM apart, its a tool used by competition drag/bracket racers to hold their RPM while waiting for the light to drop without "parking" at a specific RPM. Racers typically play head games at the line to force an already staged opponent to make a mistake or cause the car to start running hot, or do damage. This technology only really matters on a pro-tree anyway, as a bracket tree has plenty of time to rev when your staged.

Not trying to nitpick, but I see this term used incorrectly all the time as most people don't genuinely know what it is.

But for some to say you don't care what it really is or why its called that, shows quite a bit of disrespect.

 

Alright, well didn't mean to show any disrespect, just didn't know that there was such a big difference...
so basically....there's nothing I can do huh? can't play around with ecu? dammn....that sucks....

 

it hasnt been figured out but supposedly there is a way in there somewhere,, all the top tuners are working on it from what i understand so its just a matter of time

 

There are tables for it, their not specifically the launch control specific values but closed loop modifiers and lean spool tables. Its not very well documented and we aren't 100% sure what the total impact of altering them is.

 

well im gonna give it a try and let you guys know...but any chance you would know about what load this launch control would be at??

 

malibu ftw

 

If your stationary rev limit is bouncing slower than stationary rev limits of others (at same RPM) then the following things can effect the rate at which your engine accelerates in gear with clutch disengaged (which basically dictates the frequency it will bounce of the limiter):

1) Overall horsepower, esp at the rev limit RPM
2) Loss of compression
3) Diverter valve type (stock one will be half open here)
4) Cams
5) And of course - tune

Good luck

 

I'll check all those out..probably going to do a compression test on my car soon. Thanks

 

is it to simple minded that the load and ignition points would be on the high rpm, low load section of the maps? something like the top right area? I am definitely just a beginner at this stuff, but has that area been tried?

 

of course it would be at 5500 rpm as that is where my launch control is at...but the load i'm not to sure in what range it would be...

 

I run a Vishnu Xede with LC. I had the same problem because the car was getting 100% fuel then 0% fuel while stutterboxing. I adjusted my fuel table to speed it up. Instead of going from 100% to 0% at an exact RPM I have it go from 100% to 50% to 0% across 400 rpm. This makes it rev like a machine gun. The associated problem is that is may create a more dangerous lean condition. Its hard to log this activity because of the speed it happens, lag of the WB, and the blending of the low load fuel mixture. I've been told 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 and the 50-75% range just keeps a small amount of fuel in the cylinder to help combustion recovery when the LC deactivates.

Here is the thread for that:

https://www.evolutionm.net/forums/sh...hlight=stutter

 

alright..but they are talkin about using 100% and 50% but ecuflash doesn't have a map for putting in percents of fuel for the Launch control...if anything i might just richen up the 5500 rpm at low load on ecuflash...dk but might as well try....and how about moving the anti-lag from 2500 to lower like 5500..so i boost like crazy....safe or will my car blow up lol??

 

Antilag = Bad for motor

Launch Control is completely different.

Couldn't you download a flash from someone with an car that stutters faster then tune the settings you do have access to?

My guess is mistu didn't build the customize supporting maps into the 03 ecu.

 

i have looked at all the maps of the cars that i have tuned as i always save their stock and tuned maps on my computer...and I looked at every single parameter and it's the same for my car...i have even loooked at 03 evo 8's that i have tuned and their parameters are the same as mine, even though they stutter faster...i'm gonna do some compression testing and check the bov...and see what's up...

 

but thanks for all the help guys....and i know that anti-lag is different than launch controll..i just said that cuz anti lag will richen me up like crazy so why not set it to 5500 lol so then my stutter is faster...but then when i'm at WOT at 5500...not good!