Antilag system but no flame?
07-14-08, 09:27 AM
#1
Rotary Enthusiast
Thread Starter
Antilag system but no flame?
I'm trying to get my Anti Lag system to work. At a certain RPM I set my ECU to add fuel. All I can do is smell to raw fuel but I'm having no luck getting it to combust in my manifold even when I'm driving hard and its really hot. Any Ideas.
And please no questions about why Im doing this or comments on how bad it is for a turbo I know its bad for it.
And please no questions about why Im doing this or comments on how bad it is for a turbo I know its bad for it.
07-14-08, 11:02 AM
#5
Rotary Enthusiast
Thread Starter
The Ecu is a Microtech LT10s and I'm using the aux wire hooked to a switch. Does anyone know HOW to retard the timing on a microtech??
Last edited by Napsterfreak15; 07-14-08 at 11:09 AM.
Trending Topics
07-14-08, 05:14 PM
#8
Rotary Enthusiast
Thread Starter
It wont retard past static (0 Degrees) which is where the crank angle sensor is locked in. I can put in a neg value but when i engage the anti lag it only adds fuel and does not retard it to the full amount set.
07-15-08, 04:45 PM
#11
Other issue with antilag is that on a piston engine, the spark plugs are always in the combustion chamber. That's not true of the rotary. Once you get to a certain point in the rotation the combustion chamber has moved completely off the spark plugs and now you're shooting the next chamber early.
07-15-08, 05:17 PM
#12
Ive never heard of an anti-lag system on a rotary engine before.
The only reason I see something wrong with it applied to the rotary engine is as what Gene has said. The spark plugs. Unless you are running a port where it overlaps, retarding the timing by 30-40 degrees will not even have an effect for the anti-lag system......unless im wrong.
I seen rev limiters doing the same thing as an anti lag on a rotary but........I dunno.
The only reason I see something wrong with it applied to the rotary engine is as what Gene has said. The spark plugs. Unless you are running a port where it overlaps, retarding the timing by 30-40 degrees will not even have an effect for the anti-lag system......unless im wrong.
I seen rev limiters doing the same thing as an anti lag on a rotary but........I dunno.
07-15-08, 05:25 PM
#13
registered user
iTrader: (1)
Join Date: Jan 2006
Location: San Diego
Posts: 2,469
Likes: 0
Received 0 Likes
on
0 Posts
anti lag works great on a rotary engine.....
What you missing is selective ignition cut not retard, it functions as an ignition cutting rev limiter. When a cyl or rotor is fired its still fired on the same timing map, but the ecu drops spark events in sequence to keep the engine rpm in a window or below a preset limit. This is what enables you to have both fuel and air exiting the engine at the same time enabling it to burn in the manifold. Simply retarding the ign means its burning as the rotor is moving away from compression which does nothing but heat up the engine and crack the exhaust inserts.
Never fucked with a microtech but it should be called a 2 step rev limiter.
Other possible ways to do anti lag exist but it can get much more complex, some systems are setup with an air pump or an air bleed that pumps air into the exhaust manifold to keep the turbo spooled between flat (WOT) shifts... This is usually used for rally's.
don't attempt to use antilag if you have a cat converter in the system, you will either blow the guts of it out or blow it up.
What you missing is selective ignition cut not retard, it functions as an ignition cutting rev limiter. When a cyl or rotor is fired its still fired on the same timing map, but the ecu drops spark events in sequence to keep the engine rpm in a window or below a preset limit. This is what enables you to have both fuel and air exiting the engine at the same time enabling it to burn in the manifold. Simply retarding the ign means its burning as the rotor is moving away from compression which does nothing but heat up the engine and crack the exhaust inserts.
Never fucked with a microtech but it should be called a 2 step rev limiter.
Other possible ways to do anti lag exist but it can get much more complex, some systems are setup with an air pump or an air bleed that pumps air into the exhaust manifold to keep the turbo spooled between flat (WOT) shifts... This is usually used for rally's.
don't attempt to use antilag if you have a cat converter in the system, you will either blow the guts of it out or blow it up.
Last edited by slo; 07-15-08 at 05:31 PM.
07-15-08, 05:37 PM
#14
anti lag works great on a rotary engine.....
What you missing is selective ignition cut not retard, it functions as an ignition cutting rev limiter. When a cyl or rotor is fired its still fired on the same timing map, but the ecu drops spark events in sequence to keep the engine rpm in a window or below a preset limit. This is what enables you to have both fuel and air exiting the engine at the same time enabling it to burn in the manifold. Simply retarding the ign means its burning as the rotor is moving away from compression which does nothing but heat up the engine and crack the exhaust inserts.
Never fucked with a microtech but it should be called a 2 step rev limiter.
Other possible ways to do anti lag exist but it can get much more complex, some systems are setup with an air pump or an air bleed that pumps air into the exhaust manifold to keep the turbo spooled between flat (WOT) shifts... This is usually used for rally's.
don't attempt to use antilag if you have a cat converter in the system, you will either blow the guts of it out or blow it up.
What you missing is selective ignition cut not retard, it functions as an ignition cutting rev limiter. When a cyl or rotor is fired its still fired on the same timing map, but the ecu drops spark events in sequence to keep the engine rpm in a window or below a preset limit. This is what enables you to have both fuel and air exiting the engine at the same time enabling it to burn in the manifold. Simply retarding the ign means its burning as the rotor is moving away from compression which does nothing but heat up the engine and crack the exhaust inserts.
Never fucked with a microtech but it should be called a 2 step rev limiter.
Other possible ways to do anti lag exist but it can get much more complex, some systems are setup with an air pump or an air bleed that pumps air into the exhaust manifold to keep the turbo spooled between flat (WOT) shifts... This is usually used for rally's.
don't attempt to use antilag if you have a cat converter in the system, you will either blow the guts of it out or blow it up.
I havent seen a true anti lag system on a rotary engine yet. I only seen rev limiter knock offs.
If you want to be different and save your turbo just go the EGR route. By letting air from the compress side of the intake shoot itself into the exhaust manifold, the extra air will ignite the unburnt fuel and expand spinning the turbine. Its the same concept for shooting flames out your exhaust. Unburnt fuel traveling through the exhaust pipes, and once it reaches the end, its exposed to air and it ignites.
07-15-08, 06:38 PM
#15
Lives on the Forum
Watch it...
There is "anti-lag" which implies a "flat shift", and there is a "2 stage" which implies a launch from a dead stop.
A true anti-lag requires:
1) additional fuel
2) retarded igniton timing
3) clutch switch input to the ECU to signal the clutch pedal has been depressed
If you can't do all of the above, you can't do anti-lag.
I am not aware the Microtech is capable of doing this, and reading the OP's comments, it can't.
A rev-limit has nothing to do with anti-lag.
In fact, if you try and engage a rev limit on top of the anti-lag function, you can get out-of-control results.
To the OP, why the **** you messing with this on a street vehicle?
Not only is this detrimental to the engine, turbo, and exhaust system, but the transmission is going to puke too.
Are you trying to break everything on purpose?
-Ted
There is "anti-lag" which implies a "flat shift", and there is a "2 stage" which implies a launch from a dead stop.
A true anti-lag requires:
1) additional fuel
2) retarded igniton timing
3) clutch switch input to the ECU to signal the clutch pedal has been depressed
If you can't do all of the above, you can't do anti-lag.
I am not aware the Microtech is capable of doing this, and reading the OP's comments, it can't.
A rev-limit has nothing to do with anti-lag.
In fact, if you try and engage a rev limit on top of the anti-lag function, you can get out-of-control results.
To the OP, why the **** you messing with this on a street vehicle?
Not only is this detrimental to the engine, turbo, and exhaust system, but the transmission is going to puke too.
Are you trying to break everything on purpose?
-Ted
07-15-08, 06:42 PM
#16
Lives on the Forum
You want a half-*** anti-lag?
Turn off the decel fuel-cut off.
Enrich the high vacuum ranges of the fuel map (where the engine will be when you lift off the throttle) from 4kRPM to redline.
This will work almost the same as a true anti-lag.
-Ted
Turn off the decel fuel-cut off.
Enrich the high vacuum ranges of the fuel map (where the engine will be when you lift off the throttle) from 4kRPM to redline.
This will work almost the same as a true anti-lag.
-Ted
Thread
Thread Starter
Forum
Replies
Last Post
Turblown
Vendor Classifieds
12
10-17-20 03:25 PM
joel(PA)
Group Buy & Product Dev. FD RX-7
8
10-04-15 06:07 PM
