ms anti-lag?

[midnight]

has anyone downloaded the new firmware on ms to run anti lag? just looking for anyones experience with it on e30, and i know for anti lag u really want a maram shafted turbo, but i was wondering how much beating a holset hx40 would take from it, wont be using it all the time, would only use the anti lag on track, quater mile and to embarise a few saxos....

[e30_Turbo]

If you use the spark cut only when setting a rev limit you get the same effect, the unburnt fuel ignites in the hot side and spins the turbo right up, much more than my wastegate is set too.

I only noticed as I hit the "max boost" button on my Defi boost gauge and it showed 0.9bar although I hadn't actually moved anywhere!

Can't say the turbo didn't like it but the backfires were awesome and the flames out the back were starting to take the paint of the bumper!

It's a very harsh way of getting boost early and I wouldn't anymore power early anyway as I've found I've lost no torque down low from the conversion, still pulls lovely off boost.

You planning on using it then?

[midnight]

yeah actually i like the sound out of doing it that way, but my mate found there is actual specific firmware to run it now, mainly i want it for cooking people bumpers that park to close to me. haha, but yeah i def on doing it, aint really seeing anyone else running it, nice to be different

[Yaninnya]

First of all, it is not only a matter of different software. You need to modify idle valve, because with closed throttle there is not enough flow throu it. Also it is very, very, very harsh for turbo. You can kill it after feew hudret miles.
Jan

[oldroydsr4]

It is harsh on the turbo, however iv heard that the honda boys in the us have given the holsets hell and they seem to withstand it.

[Yaninnya]

I havn't heard, I tested it by myself on GPA Escorts Cossie. And ALS in road car is too little for too much by far.
Jan

[fowler]

anti lag?? its debatible if you will need it if you can keep it in the right gear the turbo will always be spooling so no need for all this anti lag chat
plus new firm ware is a bit of an unknown quatity and full of software bugs that need to be ironed out.

[Yaninnya]

anti lag?? its debatible if you will need it if you can keep it in the right gear the turbo will always be spooling so no need for all this anti lag chat.

I'm afraid that you have no idea what is ALS and how it is working. It is building the boost pressure when the throttle is closed...
Jan

[Karan]

also good to remember it will kill ure exhaust valves

[Yaninnya]

Will shorten its life but not kill. It is too short time of constant work to damage exhaust valves.
Jan

[fowler]

I'm afraid that you have no idea what is ALS and how it is working. It is building the boost pressure when the throttle is closed...
Jan

the main reason you have Lag is the amout of time the turbo takes to build the pressure round the system before it reaches the throttle plate so don't talk to me about not understanding!!!
considering i own a BMW turbo i think i should know how it works.
Honestly from an M20 B25 with a HX40 full boost would prob be acived around 4-5K so i can see the reasoning for anti lag system
so please place pipe in arse and smoke it

[Yaninnya]

the main reason you have Lag is the amout of time the turbo takes to build the pressure round the system before it reaches the throttle plate so don't talk to me about not understanding!!!

And it have nothing in common with ALS. The whole idea behind ALS is that after sudden throttle close (during braking, some unexpected slides, etc.) the turbo is slowing down so no boost. In condition like that, ALS is adding a lot of fuel and extremally reducing ignition advance. In result there is no any increase in engine power but a lot of exhaust gases which are speeding up the turbo which is all the time on boost (that's why cars with ALS are poping so loud into exhaust). To make it work you need to have high flow idle valve because standard one can't flow enough air. So I'm afraid that your comment about understanding was way out of line.

considering i own a BMW turbo i think i should know how it works.

Maybe you shoud but you don't.

Honestly from an M20 B25 with a HX40 full boost would prob be acived around 4-5K so i can see the reasoning for anti lag system
so please place pipe in arse and smoke it

Which means that size of your turbo is miles form optimal so please be a little more polite, specially when you are not right.
Jan

[Karan]

maybe fowler is getting confused with spool up as opposed to lag?

ALS would not lower the spool up point of a turbo, but it would reduce lag when coming on/off/on throttle

[Gunni]

Com´on gents,
touch of NOZ at low rpms whil get anything boosting quickly ;)
Some have NOZ coming in for less then half a second to get instant boost.


boost doesn´t have to come down low to be impossible to get at launching on a drag track.
you just need a good wastegate control i.e closed until beginning of 3rd gear ;)
plenty grip and plenty revs when taking off,
it may also be better to launch in second gear depending on the rear diff ratio.

[fowler]

apoligies brain is not working on night shift bit backwards did not read the original post properly exactly as Karan says i got the 2 round the wrong way
Well if lag is what you worry about when on / off throttle then nos can be introduce as previuosly stated for continous "spool".
But from what i have been reading from the new MS firm wire this out put is quite easy configure.
But a re-circulating dump could be used regain some of the losses incurred.

[midnight]

well i have been looking into how the ford lads do it and i have all the information about modiying a cosworth throttle body to cope with als, so thats the route i would be taking to aid the airflow through the idle vale.