Lingenfelter Launch Control (2-step)
04-14-2009, 02:49 PM
#141
I've read in the LNC-002 manual that due to the cut in spark and not fuel that it is not recommeded on cars equipped with catalytic converters.
I have a street car that passes emissions, so I have to run cats on my car...
But, only making a 5-6 track visits per year and knowing to only mat the throttle when both lanes are staged (so the time exposer would be minimal) is this something I really need to worry about?
Granted, I don't want to ruin a cat after the first track visit with this little device... but would that really happen?
I have a street car that passes emissions, so I have to run cats on my car...
But, only making a 5-6 track visits per year and knowing to only mat the throttle when both lanes are staged (so the time exposer would be minimal) is this something I really need to worry about?
Granted, I don't want to ruin a cat after the first track visit with this little device... but would that really happen?
04-14-2009, 03:50 PM
#142
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With the 2 step activated, it is like the suspension never gets loaded like it should and it is a dog out of the hole. My 60 foot times are 1.75 +/- and it is very hard to cut a good light (.700 - .800 lights)
With my converter, I can set the 2 step to leave at 2700 rpm max. Anything more than that and the converter / brakes will not hold.
My 2 step is activated by a switch on the brake pedal. Thoughts?
04-14-2009, 04:02 PM
#143
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No expert, but I would think if you matted it when the yellow bulbs started coming down, you would be OK. Then again, it probably depends on size of injectors and set RPM. Stock injectors probably ok at any rpm. Big hogs , like the green tops, at 3000 rpm will probably **** too much fuel down the exhaust and cause some issues at some point and time.
04-14-2009, 04:12 PM
#144
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What are you launching at? I am not too sure I like this. When I do a dry launch without the 2 step engaged, I lift the front front wheels and the car launches beautiful. My 60 foots are 1.67 +/- and my lights are between .500 and .590
With the 2 step activated, it is like the suspension never gets loaded like it should and it is a dog out of the hole. My 60 foot times are 1.75 +/- and it is very hard to cut a good light (.700 - .800 lights)
With my converter, I can set the 2 step to leave at 2700 rpm max. Anything more than that and the converter / brakes will not hold.
My 2 step is activated by a switch on the brake pedal. Thoughts?
With the 2 step activated, it is like the suspension never gets loaded like it should and it is a dog out of the hole. My 60 foot times are 1.75 +/- and it is very hard to cut a good light (.700 - .800 lights)
With my converter, I can set the 2 step to leave at 2700 rpm max. Anything more than that and the converter / brakes will not hold.
My 2 step is activated by a switch on the brake pedal. Thoughts?
Track prep was good that night too because I did a run without the two step and went 1.53 60'
04-14-2009, 04:20 PM
#145
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well i dont know why it would not let a m6 car hook.
i rev to 5k hold it there and pop the clutch, and floor it
i dont see how this would cause a traction problem
i rev to 5k hold it there and pop the clutch, and floor it
i dont see how this would cause a traction problem
04-14-2009, 06:22 PM
#146
Tryed mine for the first time last week with the same results.. Blew the tires off.. I normally leave at 5.5K before the two step and 60' in the mid 1.5s.. So I started at 5.1K blew the tires off to a 1.79 60' and worked my way down.. 4.7k blew the tires off to a 1.63 60'.. and 4.3K bogged a little to a 1.66 60'.. I think 4.5k on my next track day will yeld better results.. But for right now its looking like this is going to be great for bracket racing and not for all out ETs..
Track prep was good that night too because I did a run without the two step and went 1.53 60'
Track prep was good that night too because I did a run without the two step and went 1.53 60'
04-16-2009, 05:37 PM
#149
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If you have a trans brake with a good stall, why do you think you need a 2 step? Seems the trans brake would be superior and a 2 step would do little, if any, to compliment what it is doing. Thoughts?
05-19-2009, 08:35 PM
#150
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SO how many of you M6 Guys are using the LNC-00x 2step as an aide to powershift?? How long (many miles/passes) have you been powershifting the car with the 2step as an aide?? And what have you broke if anything?? also powernumber would be great as well.
05-19-2009, 10:01 PM
#152
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06-14-2009, 11:48 AM
#153
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Well i have my 2step installed and with it set a 4200rpm i noticed that it causes my car to make a terrible pop when reved anything higher than 5500k and shifted to the next gear. But with the unit shut off i dont get any pop at all.
Is this popping bad for my motor?? What can be hurt??
Is this popping bad for my motor?? What can be hurt??
06-14-2009, 01:44 PM
#156
And if you have a turbo/blower the stall keeps going up as the turbo spools and boost from the blower builds. Once you get to a point and go past where the highest torque multiplication point is you will actually run slower - that applies to high stalled N/A cars as well.
My car foot braking from 1000rpm, 1.35-1.40 60 foots.
Trans brake with no two step WOT (around 5500RPM), 1.45-1.50 60 foots.
Trans brake with 2 step at 2700rpm, 1.30-1.35 60 foots.
You results will vary depending on the converter/engine combo of course. If I had a tighter converter then the two step may not yield me the same results, but if I had a tighter converter the car wouldnt run as well off the footbrake. Its just another tuning aid, makes less heat and is pretty much a must have for a turbo car.
As easy as these are to install its almost silly NOT to have one if you have a trans brake and are looking for a little more tunability off the line. 60 foots are everything for a low power guy like myself
06-14-2009, 02:31 PM
#157
As KP mentioned it is a great tuning aid.
My car produces anywhere from low to mid 1.4's on the foot brake at a 3,000 RPM launch. On the trans brake set at 2,700 RPM with the loud pedal to the floor the car produced three 1.47's back to back the last time out!
N2
My car produces anywhere from low to mid 1.4's on the foot brake at a 3,000 RPM launch. On the trans brake set at 2,700 RPM with the loud pedal to the floor the car produced three 1.47's back to back the last time out!
N2
06-14-2009, 06:07 PM
#159
Any issue with running it off of say a 5k rpm launch setting with out using the secondary? By this I mean what if I were to install one off the clutch swith but just use it for launching at say 5k. What would happen when I power/speed shift wot at 7k? Would this hurt anything or would I need to use the secondary at a rpm limit of 7500?? Thanks in advance.
