anyone put a misfiring system on their FC?
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Rotary Freak
Joined: Apr 2002
Posts: 1,739
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From: Boulder, CO
well, actually, they would really help, especially for people who have a big turbo.
oh, and for those of you who don't know what a misfiring system is, her is a crappy breif description of what it is: (just found this on the net)
oh, and for those of you who don't know what a misfiring system is, her is a crappy breif description of what it is: (just found this on the net)
MISFIRING SYSTEM
aka 'ALS = Anti Lag System', aka 'Bang bang' system
Another solution to turbo lag is known as the misfiring system shown in Sudou's Lancer Evolution III. This is not a normal feature on street cars and is a system usually used in race cars only, particularly turbocharged rally cars. As explained before, turbo systems can suffer from lag effect, especially when the driver lifts his foot off the gas to make a turn. This generates less power which in turn generates less exhaust gas and lowers the pressure needed to drive the turbine. When the turbine looses this pressure it slows down and needs time to spin up again, which creates lag in power. The ALS prevents this by sensing when the driver lifts his foot off the gas/throttle and injects fuel directly into the exhaust system itself. This fuel then detonates creating a mini-explosion in the exhaust manifold and the force of the explosion is enough to maintain boost pressure needed to keep the turbo up to speed even when the car is slowing down. This virtually eliminates all turbo lag and maxmizes power for a car after it brakes and comes out of a turn. These systems are not legal on street cars and due to the constant fuel detonations, eventually destroys a turbo and exhaust system every 500-1000 km in race cars, and likely faster in street cars.
aka 'ALS = Anti Lag System', aka 'Bang bang' system
Another solution to turbo lag is known as the misfiring system shown in Sudou's Lancer Evolution III. This is not a normal feature on street cars and is a system usually used in race cars only, particularly turbocharged rally cars. As explained before, turbo systems can suffer from lag effect, especially when the driver lifts his foot off the gas to make a turn. This generates less power which in turn generates less exhaust gas and lowers the pressure needed to drive the turbine. When the turbine looses this pressure it slows down and needs time to spin up again, which creates lag in power. The ALS prevents this by sensing when the driver lifts his foot off the gas/throttle and injects fuel directly into the exhaust system itself. This fuel then detonates creating a mini-explosion in the exhaust manifold and the force of the explosion is enough to maintain boost pressure needed to keep the turbo up to speed even when the car is slowing down. This virtually eliminates all turbo lag and maxmizes power for a car after it brakes and comes out of a turn. These systems are not legal on street cars and due to the constant fuel detonations, eventually destroys a turbo and exhaust system every 500-1000 km in race cars, and likely faster in street cars.
I think that your money woudl be better spent on other things that reduce turbo lag, and start off by selecting the right turbo that will give you the boost you wan't with minimal spool up time.
SOLD THE RX-7!
Joined: Mar 2001
Posts: 7,451
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From: Vancouver, BC, Canada
those race turbo's blades are made outa titanium and need to be replaced every race. if you added that to the stock turbo it would shatter the blades after a few uses.
ah yes. read the last sentance.. (I just did :P )
ah yes. read the last sentance.. (I just did :P )
Junior Member
Joined: Aug 2002
Posts: 43
Likes: 0
From: Lansing, MI, USA
GAHHH! The ricing of initial d. Don't turn it into f&f. Only pro rally race cars have misfiring systems.
And the system described is wrong, that's the stupidest way to do it. You dont tap injectors into the manifold and spray to create an explosion. You actually 'misfire' by advancing timing(a little hard on rotary) by like 40 degrees. The fuel goes through and get dumped into the manifold, and bang. And it's not when you depress the gas, it's at lower revs that the system changes the timing.
And the system described is wrong, that's the stupidest way to do it. You dont tap injectors into the manifold and spray to create an explosion. You actually 'misfire' by advancing timing(a little hard on rotary) by like 40 degrees. The fuel goes through and get dumped into the manifold, and bang. And it's not when you depress the gas, it's at lower revs that the system changes the timing.
Thread Starter
Rotary Freak
Joined: Apr 2002
Posts: 1,739
Likes: 0
From: Boulder, CO
I know, it will destroy stuff, and all the other side effects, but I was just wondering if its been done on an FC.
so suddenly, because someone asks about something that just happens to be in initial D, it turns into rice?.
oh, and I didn't realize that reference to initial D in that quote I posted. DAMMINT!!!!!
WTF??? where'd you get that one? I don't see that anywhere in any of the above posts?
and again, where did you pick up that line?
GAHHH! The ricing of initial d. Don't turn it into f&f.
oh, and I didn't realize that reference to initial D in that quote I posted. DAMMINT!!!!!
You dont tap injectors into the manifold and spray to create an explosion.
And it's not when you depress the gas, it's at lower revs that the system changes the timing.
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Rotary Enthusiast
Joined: Apr 2003
Posts: 757
Likes: 0
From: NW Arkansas
you can left foot brake too if it's that necessary. and all the ALSs i've seen are a spark plug up wind of the turbo that goes nuts on the unburnt fuel.
reguardless, it ain't for the street.
reguardless, it ain't for the street.
Junior Member
Joined: Aug 2002
Posts: 43
Likes: 0
From: Lansing, MI, USA
I guess I have to point some things out to you:
"The ALS prevents this by sensing when the driver lifts his foot off the gas/throttle and injects fuel directly into the exhaust system itself. This fuel then detonates creating a mini-explosion in the exhaust manifold and the force of the explosion is enough to maintain boost pressure needed to keep the turbo up to speed even when the car is slowing down."-from your quote
First off, it says "sensing when the driver lifts his foot off the gas/throttle and injects fuel directly into the exhaust system itself.". It doesn't sound like it's just spraying through the combustion chamber into the exhaust mani. It says directly. Maybe they didn't mean that, but maybe they should rethink their explanation.
Next, when I said "at lower revs it kicks in". I meant that the described system says: "The ALS prevents this by sensing when the driver lifts his foot off the gas/throttle and injects fuel directly into the exhaust system itself." So when you depress the gas it will inject and go boom. Most pro systems only work at low revs, now yes this system could be classified as working in the lower-rev range. But when you're at redline and you only drop to about 4.5-5K revs, that's not low.
"The ALS prevents this by sensing when the driver lifts his foot off the gas/throttle and injects fuel directly into the exhaust system itself. This fuel then detonates creating a mini-explosion in the exhaust manifold and the force of the explosion is enough to maintain boost pressure needed to keep the turbo up to speed even when the car is slowing down."-from your quote
First off, it says "sensing when the driver lifts his foot off the gas/throttle and injects fuel directly into the exhaust system itself.". It doesn't sound like it's just spraying through the combustion chamber into the exhaust mani. It says directly. Maybe they didn't mean that, but maybe they should rethink their explanation.
Next, when I said "at lower revs it kicks in". I meant that the described system says: "The ALS prevents this by sensing when the driver lifts his foot off the gas/throttle and injects fuel directly into the exhaust system itself." So when you depress the gas it will inject and go boom. Most pro systems only work at low revs, now yes this system could be classified as working in the lower-rev range. But when you're at redline and you only drop to about 4.5-5K revs, that's not low.
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