Your experience with launch controllers?
Thread Starter
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Joined: May 2013
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From: ATL
Your experience with launch controllers? So I recently purchased a fully built 78mm turbo Trans Am M6. I'm taking it to the track and I want to be able to built a little boost on the line (I've been previously spoiled with autos). I assumed with a launch controller I'd be able to set the max rpm to say, 3 or 4K and just give it WOT and it would make boost and everything would be hunky dory. So I bought a used Lingefelter LNC-002 and installed it yesterday and it seems to function as its intended, but if I give it more than about half throttle it starts back-firing and sounds like it's about to blow my exhaust system to kingdom come. But at half throttle (when it's not back-firing much) it's not even making boost. I know at the track I've heard plenty of cars with launch controllers sitting on the line doing the spitting and sputtering, but not full blow backfiring like my car is doing.
The lingenfelter only kills spark (and can retard timing) to limit the rpm, so I realize it's dumping all that raw fuel out the exhaust and causing the back-firing.
So 2 questions:
1. Why do they design it like this instead of just shutting off injectors???
2. Do you think I'd be ok giving it WOT, or am I going to blow up a header or something with all that back-firing??
The lingenfelter only kills spark (and can retard timing) to limit the rpm, so I realize it's dumping all that raw fuel out the exhaust and causing the back-firing.
So 2 questions:
1. Why do they design it like this instead of just shutting off injectors???
2. Do you think I'd be ok giving it WOT, or am I going to blow up a header or something with all that back-firing??
So I recently purchased a fully built 78mm turbo Trans Am M6. I'm taking it to the track and I want to be able to built a little boost on the line (I've been previously spoiled with autos). I assumed with a launch controller I'd be able to set the max rpm to say, 3 or 4K and just give it WOT and it would make boost and everything would be hunky dory. So I bought a used Lingefelter LNC-002 and installed it yesterday and it seems to function as its intended, but if I give it more than about half throttle it starts back-firing and sounds like it's about to blow my exhaust system to kingdom come. But at half throttle (when it's not back-firing much) it's not even making boost. I know at the track I've heard plenty of cars with launch controllers sitting on the line doing the spitting and sputtering, but not full blow backfiring like my car is doing.
The lingenfelter only kills spark (and can retard timing) to limit the rpm, so I realize it's dumping all that raw fuel out the exhaust and causing the back-firing.
So 2 questions:
1. Why do they design it like this instead of just shutting off injectors???
2. Do you think I'd be ok giving it WOT, or am I going to blow up a header or something with all that back-firing??
The lingenfelter only kills spark (and can retard timing) to limit the rpm, so I realize it's dumping all that raw fuel out the exhaust and causing the back-firing.
So 2 questions:
1. Why do they design it like this instead of just shutting off injectors???
2. Do you think I'd be ok giving it WOT, or am I going to blow up a header or something with all that back-firing??
2. The backfiring youre hearing is the intentional misfire of the cylinder that had the spark cut. I only needed about 1/2 to 3/4 throttle to hit the 4k cut rpm and build boost, but I did have to play with the timing retard and make sure there were no boost leaks in the cold side wasting the boost I'm trying to build. It's bad to sit for long periods of time on a 2 step so better to give it more gas for a short period of time and then let go. Just my experience though
I got greedy when I was lining up next to a gtr. 4400 blew the tires off for me. 4k would hook though. I'd try 3/4 throttle and see if it'll build boost. You may also check for vacuum/boost leaks.
Thread Starter
8 Second Club
Joined: May 2013
Posts: 103
Likes: 1
From: ATL
Ok, I'll try that. It doesn't have any air leaks that I know of right now. When I first got it one of the silicone boots was blown on the cold side and was losing all the boost, but that was an easy fix.
Also, I modified the Cut-out pipe and put an electric cut out on it. Love that sound!!!
Also, I modified the Cut-out pipe and put an electric cut out on it. Love that sound!!!
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Full throttle when on a 2-step. If not, you are restricting air to the turbo you are trying to spool, but the main reason is you are supposed to leave with your foot on the floor. That is the only way to have any consistency from run to run.
Then you fine tune RPM for the track conditions, 100 RPM at a time. It works best if you're only adjusting one thing, and use the exact same throttle position and clutch engagement technique every time.
Start out a little lower, then work your way up if the track will hold.
Al
Then you fine tune RPM for the track conditions, 100 RPM at a time. It works best if you're only adjusting one thing, and use the exact same throttle position and clutch engagement technique every time.
Start out a little lower, then work your way up if the track will hold.
Al
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