...we'll see what happens
launch control
Drifting
Joined: May 1999
Posts: 1,370
Likes: 12
From: Garwood NJ
Le Mans Master
Joined: Aug 1999
Posts: 8,827
Likes: 10
Just for a little clarification...
The "Launch Control" Box from Lingenfelter doesn't help with traction control type issues. It's simply and literally a two-step. That's the real drag racing term for this unit.
It's good for two things:
1) Consistency @ the track
2) BREAKING PARTS
I almost always snap a rear-end, axle, or tranny when leaving on my two-step @ 2400 RPMS and 3 Lbs of boost.
Definitely a great tool for drag racers who are looking for consistency - but be ready to break a few parts! You'll leave HARD with this little piece (assuming you also have the tires to go along with it).
I bought mine through Hinsons SuperCars (supporting vendor here) for about $260.... (Someone had asked about the price but I don't think anyone has answered yet)
Hope this helps!
The "Launch Control" Box from Lingenfelter doesn't help with traction control type issues. It's simply and literally a two-step. That's the real drag racing term for this unit.
It's good for two things:
1) Consistency @ the track
2) BREAKING PARTS
I almost always snap a rear-end, axle, or tranny when leaving on my two-step @ 2400 RPMS and 3 Lbs of boost.
Definitely a great tool for drag racers who are looking for consistency - but be ready to break a few parts! You'll leave HARD with this little piece (assuming you also have the tires to go along with it).
I bought mine through Hinsons SuperCars (supporting vendor here) for about $260.... (Someone had asked about the price but I don't think anyone has answered yet)
Hope this helps!
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,176
Likes: 69
From: Long Island NY
yea i dont know what your doing or how your driving but mine leave much easier, i did this to try and stop breaking parts.....if you just dump the clutch then of course your car will be pushed off the track
Team Owner
Joined: Feb 2001
Posts: 27,246
Likes: 130
From: Short Hills, NJ
Just for a little clarification...
The "Launch Control" Box from Lingenfelter doesn't help with traction control type issues. It's simply and literally a two-step. That's the real drag racing term for this unit.
It's good for two things:
1) Consistency @ the track
2) BREAKING PARTS
I almost always snap a rear-end, axle, or tranny when leaving on my two-step @ 2400 RPMS and 3 Lbs of boost.
Definitely a great tool for drag racers who are looking for consistency - but be ready to break a few parts! You'll leave HARD with this little piece (assuming you also have the tires to go along with it).
The "Launch Control" Box from Lingenfelter doesn't help with traction control type issues. It's simply and literally a two-step. That's the real drag racing term for this unit.
It's good for two things:
1) Consistency @ the track
2) BREAKING PARTS
I almost always snap a rear-end, axle, or tranny when leaving on my two-step @ 2400 RPMS and 3 Lbs of boost.
Definitely a great tool for drag racers who are looking for consistency - but be ready to break a few parts! You'll leave HARD with this little piece (assuming you also have the tires to go along with it).
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,176
Likes: 69
From: Long Island NY
Pro
Joined: Sep 2008
Posts: 510
Likes: 0
From: San Antonio TX
Wow! I didn't even know something like that existed.
Anyway, If I get this right, this interceptor cuts out the spark, but allows raw fuel into the cylinders? Are you concerned with cylinder wash-down at all? Forget the cats; this has to be murder on the cylinder walls.
Am I missing something here? Excuse my ignorance please.
Rick
Anyway, If I get this right, this interceptor cuts out the spark, but allows raw fuel into the cylinders? Are you concerned with cylinder wash-down at all? Forget the cats; this has to be murder on the cylinder walls.
Am I missing something here? Excuse my ignorance please.
Rick
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Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Wow! I didn't even know something like that existed.
Anyway, If I get this right, this interceptor cuts out the spark, but allows raw fuel into the cylinders? Are you concerned with cylinder wash-down at all? Forget the cats; this has to be murder on the cylinder walls.
Am I missing something here? Excuse my ignorance please.
Rick
Anyway, If I get this right, this interceptor cuts out the spark, but allows raw fuel into the cylinders? Are you concerned with cylinder wash-down at all? Forget the cats; this has to be murder on the cylinder walls.
Am I missing something here? Excuse my ignorance please.
Rick
Pro
Joined: Sep 2008
Posts: 510
Likes: 0
From: San Antonio TX
Also, the burble you speak of, from my experience, is caused by small air leaks somewhere in the exhaust system. Real bad leaks cause horrible backfires.
I don't know, maybe I'm all wrong.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Are you sure about that? I always thought the ECU shot down fuel to near zero on decel.
Also, the burble you speak of, from my experience, is caused by small air leaks somewhere in the exhaust system. Real bad leaks cause horrible backfires.
I don't know, maybe I'm all wrong.
Also, the burble you speak of, from my experience, is caused by small air leaks somewhere in the exhaust system. Real bad leaks cause horrible backfires.
I don't know, maybe I'm all wrong.
*ALL* corvettes burble on decel, but few corvettes have exhaust leaks (I know mine doesn't; I installed the exhaust myself); you can't hear it very well on a stock one, but as soon as you put some high flow cats and a loud exhast, it becomes obvious...
Melting Slicks
Joined: May 2006
Posts: 2,891
Likes: 1
From: NJ..."the way I saw it, everyone takes a beating sometimes."
Wow! I didn't even know something like that existed.
Anyway, If I get this right, this interceptor cuts out the spark, but allows raw fuel into the cylinders? Are you concerned with cylinder wash-down at all? Forget the cats; this has to be murder on the cylinder walls.
Am I missing something here? Excuse my ignorance please.
Rick
Anyway, If I get this right, this interceptor cuts out the spark, but allows raw fuel into the cylinders? Are you concerned with cylinder wash-down at all? Forget the cats; this has to be murder on the cylinder walls.
Am I missing something here? Excuse my ignorance please.
Rick
Warnings for use of this product-
Because the LNC-002 acts by disabling spark to individual cylinders, not by disabling fuel like a production RPM limiters it is not meant for use on the street or for use on cars equipped with catalytic converters. The LNC-002 is only for use on race vehicles on the race track. Failure to follow these precautions will result in premature catalyst failure. DO NOT operate the engine with the LNC-002 active for extended periods of time. Because of the raw fuel entering the exhaust, a risk of backfiring exists if you do so.
I'd like to hear some more info on this and how difficult and/or accurate the adjustments are. This doesn't require any tuning, correct? Everything can be done from the controller?
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
From LPE's website.
Warnings for use of this product-
Because the LNC-002 acts by disabling spark to individual cylinders, not by disabling fuel like a production RPM limiters it is not meant for use on the street or for use on cars equipped with catalytic converters. The LNC-002 is only for use on race vehicles on the race track. Failure to follow these precautions will result in premature catalyst failure. DO NOT operate the engine with the LNC-002 active for extended periods of time. Because of the raw fuel entering the exhaust, a risk of backfiring exists if you do so.
I'd like to hear some more info on this and how difficult and/or accurate the adjustments are. This doesn't require any tuning, correct? Everything can be done from the controller?
Warnings for use of this product-
Because the LNC-002 acts by disabling spark to individual cylinders, not by disabling fuel like a production RPM limiters it is not meant for use on the street or for use on cars equipped with catalytic converters. The LNC-002 is only for use on race vehicles on the race track. Failure to follow these precautions will result in premature catalyst failure. DO NOT operate the engine with the LNC-002 active for extended periods of time. Because of the raw fuel entering the exhaust, a risk of backfiring exists if you do so.
I'd like to hear some more info on this and how difficult and/or accurate the adjustments are. This doesn't require any tuning, correct? Everything can be done from the controller?
Melting Slicks
Joined: Aug 2006
Posts: 2,167
Likes: 11
From: Powell TN
Cruise-In VIII Veteran
Launch Control is being offered on the new Camaro and will be on the 2010 Corvettes. Here is a video of GM explaining it.
http://www.corvetteblogger.com/index...stem-Explained
The fuel that goes into the engine on deceleration is essentially just idle fueling. All corvettes, when they meet a set criteria, shut off all fueling and spark to keep a large amount of raw fuel from destroying the cats. You're right, this is what causes the burble on deceleration at lower rpms. I don't like the sound, so on my car I changed the parameters on the DFCO (Deceleration Fuel Cut Off) so that all spark and fueling is shut of the instant I lift my foot. You can watch it on the wideband, it will read "LEAN" and then "AIR" on my PLX. It gets rid of the burble. The only drawback, I guess, is when I get back in the gas after letting off at a high rpm, but only at higher rpms, there is a slight "pop" when fueling restarts.
http://www.corvetteblogger.com/index...stem-Explained
My understanding is that the ECU allows a small amount of fuel to be injected into the engine during deceleration to help cool the cylinders down. This fuel is not ignited so when it makes it into the exhaust pipes it can ignite and make that burbling sound.
*ALL* corvettes burble on decel, but few corvettes have exhaust leaks (I know mine doesn't; I installed the exhaust myself); you can't hear it very well on a stock one, but as soon as you put some high flow cats and a loud exhast, it becomes obvious...
*ALL* corvettes burble on decel, but few corvettes have exhaust leaks (I know mine doesn't; I installed the exhaust myself); you can't hear it very well on a stock one, but as soon as you put some high flow cats and a loud exhast, it becomes obvious...
The fuel that goes into the engine on deceleration is essentially just idle fueling. All corvettes, when they meet a set criteria, shut off all fueling and spark to keep a large amount of raw fuel from destroying the cats. You're right, this is what causes the burble on deceleration at lower rpms. I don't like the sound, so on my car I changed the parameters on the DFCO (Deceleration Fuel Cut Off) so that all spark and fueling is shut of the instant I lift my foot. You can watch it on the wideband, it will read "LEAN" and then "AIR" on my PLX. It gets rid of the burble. The only drawback, I guess, is when I get back in the gas after letting off at a high rpm, but only at higher rpms, there is a slight "pop" when fueling restarts.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Being able to install it on a Corvette is the novelty... The fact that a 2010 'Vette has it doesn't do me much good since it can't be retrofitted
http://www.corvetteblogger.com/index...stem-Explained
The fuel that goes into the engine on deceleration is essentially just idle fueling. All corvettes, when they meet a set criteria, shut off all fueling and spark to keep a large amount of raw fuel from destroying the cats. You're right, this is what causes the burble on deceleration at lower rpms. I don't like the sound, so on my car I changed the parameters on the DFCO (Deceleration Fuel Cut Off) so that all spark and fueling is shut of the instant I lift my foot. You can watch it on the wideband, it will read "LEAN" and then "AIR" on my PLX. It gets rid of the burble. The only drawback, I guess, is when I get back in the gas after letting off at a high rpm, but only at higher rpms, there is a slight "pop" when fueling restarts.
The fuel that goes into the engine on deceleration is essentially just idle fueling. All corvettes, when they meet a set criteria, shut off all fueling and spark to keep a large amount of raw fuel from destroying the cats. You're right, this is what causes the burble on deceleration at lower rpms. I don't like the sound, so on my car I changed the parameters on the DFCO (Deceleration Fuel Cut Off) so that all spark and fueling is shut of the instant I lift my foot. You can watch it on the wideband, it will read "LEAN" and then "AIR" on my PLX. It gets rid of the burble. The only drawback, I guess, is when I get back in the gas after letting off at a high rpm, but only at higher rpms, there is a slight "pop" when fueling restarts.
I don't know how much of a difference it makes in the real world, but its something to think about.
Personally, I love the sound it makes, btw... Making my C6Z06 mufflers automatically close when I let off the throttle eliminated the sound, and now I miss it...
Team Owner
Joined: Feb 2001
Posts: 27,246
Likes: 130
From: Short Hills, NJ
Melting Slicks
Joined: Aug 2006
Posts: 2,167
Likes: 11
From: Powell TN
Cruise-In VIII Veteran
Yes. It has also come stock in the Mitsubishi Evolution cars for years, its been stock in the Cobalt SS since 2007, I had it on my 2005 Subaru STI, etc etc... This is nothing new.
Being able to install it on a Corvette is the novelty... The fact that a 2010 'Vette has it doesn't do me much good since it can't be retrofitted
Being able to install it on a Corvette is the novelty... The fact that a 2010 'Vette has it doesn't do me much good since it can't be retrofitted
That is true. The downside to turning it off, I am told, is that DFCO serves to cool the cylinder down between shifts; most tuners won't turn it off.
I don't know how much of a difference it makes in the real world, but its something to think about.
Personally, I love the sound it makes, btw... Making my C6Z06 mufflers automatically close when I let off the throttle eliminated the sound, and now I miss it...
I don't know how much of a difference it makes in the real world, but its something to think about.
Personally, I love the sound it makes, btw... Making my C6Z06 mufflers automatically close when I let off the throttle eliminated the sound, and now I miss it...
Theoretical situation: You and an '04 Cobra just did something illegal on the interstate and you decelerated from about 150 mph in 5th gear without using the brakes, if not for DFCO cutting off the fuel, you would be putting raw fuel directly into the cats for a long period of time. Enough raw fuel in a converter that is already over 1000 degrees will ignite and can melt the catalyst.
Pro
Joined: Sep 2008
Posts: 510
Likes: 0
From: San Antonio TX
Well, I knew fuel was drastically cut down on decel. That doesn't answer my question though. Aren't the people running this Launch Control gizmo concerned with cylinder wash down? Depending on the jerk controlling the christmas tree, it takes 2 to 5 seconds to go. That's a long time to have your engine revved up to 4k+ RPMs with raw fuel going through the cylinders, washing away the lubricating oil.
Anyway, I want to understand this a little more. Obviously, if there is no combustion, the engine stops. So, how does this controller keep the engine running without a spark? Does it fire the plugs every other cycle?
Anyway, I want to understand this a little more. Obviously, if there is no combustion, the engine stops. So, how does this controller keep the engine running without a spark? Does it fire the plugs every other cycle?
Safety Car
Joined: Nov 2007
Posts: 4,537
Likes: 1,403
From: Bethesda MD
Theoretical situation: You and an '04 Cobra just did something illegal on the interstate and you decelerated from about 150 mph in 5th gear without using the brakes, if not for DFCO cutting off the fuel, you would be putting raw fuel directly into the cats for a long period of time. Enough raw fuel in a converter that is already over 1000 degrees will ignite and can melt the catalyst.
