Simtek Antilag, how functional?
06 October 2009, 06:22 PM
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Simtek Antilag, how functional?
How functional is the Simtek antilag. I know it sounds great, but is it anywhere near as good as the systems club rally cars use at doing its job, ie to hold boost between gear changes and when backing off the throttle?
06 October 2009, 07:08 PM
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So its just a gimmick then. I was contemplating changing my Apexi for a Simtek when i have my car mapped after its new engine is run in, and was pretty tempted by the ALS, not for everyday use, but for when i fancied a spirited drive. My car being a bit laggy with the FMIC, ALS seems a tempting feature.
06 October 2009, 07:14 PM
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Not really down to the ECU i don't think but how it is mapped, Anti-lag on a road car is normally set to be very mild for reliablity and is a bit of a gimic really, i loved it on my old car mind 
I sure a Simtek ECU is capable of running aggressive Anti-lag like that on a rally car but would make the car less reliable.
I sure a Simtek ECU is capable of running aggressive Anti-lag like that on a rally car but would make the car less reliable.
06 October 2009, 08:05 PM
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If you want "proper" anti-lag then stock up on turbos.
Im sure you can have the pops and bangs mapped in without having anti-lag. But as Darren (Daz187) has said,with his mild anti-lag on his P1 the turbo has never had a problem. Im sure you could map it more aggresively.
Im sure you can have the pops and bangs mapped in without having anti-lag. But as Darren (Daz187) has said,with his mild anti-lag on his P1 the turbo has never had a problem. Im sure you could map it more aggresively.
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06 October 2009, 10:25 PM
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The SimTek antilag is fully functional although I wouldn't recommend it for road use. Positive boost at idle isn't a problem, it just requires either a throttle kicker, or a jacked open throttle.
07 October 2009, 01:16 PM
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07 October 2009, 07:33 PM
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YouTube - Anti-lag evo
how hard is it to get that sound out of your scooby?the anti lag is gr8 on simtek but it is a little mild can you not some how balance it where you dont have to damage turbos and clutches and just get a bit more bang out of it?
how hard is it to get that sound out of your scooby?the anti lag is gr8 on simtek but it is a little mild can you not some how balance it where you dont have to damage turbos and clutches and just get a bit more bang out of it?
grow up.....
07 October 2009, 10:02 PM
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Proper anti-lag gives positive boost off throttle, i.e. when changing gear etc. Hence, once you are back on throttle you have instant boost and no lag. TOTALLY pointless on the road. Only useful for sprints and rallying..... and then you have to know how to drive when using it, else you won't have much left off your turbo, pipework or valves! 
It uses similar strategies as proper positive boost launch control iirc.
I tried it on mine *the proper anti-lag* and 1bar positive boost launch control...... along with other heat related issues, the turbo was toast within 8k miles iirc.
Get your wallet out if you want to use it.
It uses similar strategies as proper positive boost launch control iirc.
I tried it on mine *the proper anti-lag* and 1bar positive boost launch control...... along with other heat related issues, the turbo was toast within 8k miles iirc.
Get your wallet out if you want to use it.
Last edited by Shaun; 07 October 2009 at 10:05 PM.
07 October 2009, 10:13 PM
#20
YouTube - Mitsubishi Evo 9 Anti-lag
07 October 2009, 10:32 PM
#21
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I use it in anger and have done for the last four years firstly when I ran with my M800 setup and subsequently when I switched to Simtek. For launching I have the launch control system set to give 1.4 bar of positive boost, but thats not using the anti lag of course, I've the als set up to give a boost gain of approx 0.5 bar at idle but who needs boost when idling (lol). The big gain (for my car) is when accellerating hard through the gears and sprinting thorugh the twisty's, my GT35 hybrid is a bit laggy at the best of times but with the als enabled its like driving a car with a vf34 instead, real boost kick, enough to flick the rear sideways. Snap changing boost does not fall below 0.5 bar and so is instant in pick up.
Yes if abused it can cause damage, I know of one guy who got involved in an "anti lag battle" with his mates, all cars stationary, he was a little drunk at the time, kept the als going for nearly 20 mins and wondered why he had bottom end failure, coolant was over 120 degrees.
Set too aggressively it can cause valves to bounce, valve shims to dislodge with subsequent piston damage.
So set up sensibly to provide real benefits its no big threat, abuse it and its another story.
cheers
bob
Yes if abused it can cause damage, I know of one guy who got involved in an "anti lag battle" with his mates, all cars stationary, he was a little drunk at the time, kept the als going for nearly 20 mins and wondered why he had bottom end failure, coolant was over 120 degrees.
Set too aggressively it can cause valves to bounce, valve shims to dislodge with subsequent piston damage.
So set up sensibly to provide real benefits its no big threat, abuse it and its another story.
cheers
bob
08 October 2009, 07:59 AM
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The SimTek ALS is fully functional and is being used on rally cars up to International level.All the tables and options are available, as Bob says, to allow whatever level of ALS you require.In addition we have an upgrade now available to use EGT sensor values to "close loop" the retard and fuel cut tables which controls the EGT within the optimum range.This gives more ALS when the turbo has cooled after a long period of full throttle, and turns the retard down and fuel cut up during long overrun periods thus preventing turbo melt down.With correct mapping you can then keep the EGT around 775-850 deg which we have found optimal for good ALS and turbo life.
08 October 2009, 01:04 PM
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So it is possible to run ALS, feel the benifit of it & not wreck the engine at the same time! That's good news as I'd always assumed ALS = f*cked car ...
TX.
PS
Is this a good ECU re dealing with an ALS etc - Autronic SM4?
TX.
PS
Is this a good ECU re dealing with an ALS etc - Autronic SM4?
Last edited by Terminator X; 08 October 2009 at 01:06 PM.
11 October 2009, 10:48 PM
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I use it in anger and have done for the last four years firstly when I ran with my M800 setup and subsequently when I switched to Simtek. For launching I have the launch control system set to give 1.4 bar of positive boost, but thats not using the anti lag of course, I've the als set up to give a boost gain of approx 0.5 bar at idle but who needs boost when idling (lol). The big gain (for my car) is when accellerating hard through the gears and sprinting thorugh the twisty's, my GT35 hybrid is a bit laggy at the best of times but with the als enabled its like driving a car with a vf34 instead, real boost kick, enough to flick the rear sideways. Snap changing boost does not fall below 0.5 bar and so is instant in pick up.
Yes if abused it can cause damage, I know of one guy who got involved in an "anti lag battle" with his mates, all cars stationary, he was a little drunk at the time, kept the als going for nearly 20 mins and wondered why he had bottom end failure, coolant was over 120 degrees.
Set too aggressively it can cause valves to bounce, valve shims to dislodge with subsequent piston damage.
So set up sensibly to provide real benefits its no big threat, abuse it and its another story.
cheers
bob
Yes if abused it can cause damage, I know of one guy who got involved in an "anti lag battle" with his mates, all cars stationary, he was a little drunk at the time, kept the als going for nearly 20 mins and wondered why he had bottom end failure, coolant was over 120 degrees.
Set too aggressively it can cause valves to bounce, valve shims to dislodge with subsequent piston damage.
So set up sensibly to provide real benefits its no big threat, abuse it and its another story.
cheers
bob
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