True Anti-lag And Turbo Life-span

[Kaido_RR]

hey,

I’m looking for anyone who has some, experience with running anti-lag with an aftermarket turbo. It doesn’t have to be an RB engine.

My many question is, how much does anti-lag reduce an aftermarket turbo life-span.

Now the anti-lag won't be running 24/7, mainly for track uses only (so it would be uses once a month) and many the odd, time off the track for say a few min's at a time.

Now i know that even if its running for 30second, the amount of heat on the turbo will be at extreme level (i picuter it as alittle bomb going off in the turbo), but would this do much damage to an aftermarket turbo?

I notice alot of wrx/evo running it (and have seen more than a handful of wrx running it on the street now and then) what makes their turbo so different to something that you would find on a rb engine?

My application is an Rb25 with hks turbo (gt2835pros) if that makes a difference?

any help would be welcomed

thanks michael

[FATGTS-R]

Nobody can give you an answer as to how much the life span will reduce. It might even last longer than an equivalent car without the anti lag. Too many variables to say running the AL will reduce its life by xx%.

I assume you have also thought about the other side effects of running the anit lag? As in greatly increased heat in the exhaust manifold and entire system which could lead to premature cracking of the manifold especially if it wasnt great to begin with. Do you have a CAT? Underbonnet temps will also rise dramatically. Which could lead to premature wear of anything too close to the manifold. The exhaust valves will also take a decent beating.

Heat management needs to be very carefully planned when using this type of system if you dont want the car to burn to the ground.

[Kaido_RR]

Nobody can give you an answer as to how much the life span will reduce. It might even last longer than an equivalent car without the anti lag. Too many variables to say running the AL will reduce its life by xx%.

I assume you have also thought about the other side effects of running the anit lag? As in greatly increased heat in the exhaust manifold and entire system which could lead to premature cracking of the manifold especially if it wasnt great to begin with. Do you have a CAT? Underbonnet temps will also rise dramatically. Which could lead to premature wear of anything too close to the manifold. The exhaust valves will also take a decent beating.

Heat management needs to be very carefully planned when using this type of system if you dont want the car to burn to the ground.

thanks for the reply FATGTS-R

I didnt really think about heat management will have to look into that alot before running AL.

I will be running stock manifold, which is cast-iron should hold up.

I might do some testing around the track, do 1 or 2laps pull in check the temp in the engine bay. or even better i might setup the reading in the car then make alonger cable to the metal stick can stay in the engine bay so i can watch the temp.

thanks again for the reply fatgts-r you given me abit to think about

thanks michael

[Kaido_RR]

would something like an Exhaust Housing Blanket, be a good idea for the turbo? or would that keep the heat in and result in the heat staying on the turbo for longer after the car has cooled down.

the turbo comes with a HKS heat-shield i put that one for sure

[N I B]

Michael, Your factory manifold will bend and snap the rear manifold studs in the head.

[Kaido_RR]

Michael, Your factory manifold will bend and snap the rear manifold studs in the head.

is this a common problem steve with increase heat in the engine bay?

can it be fix with using an aftermarket Stainless Steel Manifold like HKS (not a chinacopy one)

hmm might have to look at adding an vent near the turbo on the bonnet

[N I B]

Yes its common even on hipo engines without antilag.

The turbo you have is good enough without antilag anyway.

Thought you sold it?

[Kaido_RR]

Yes its common even on hipo engines without antilag.

The turbo you have is good enough without antilag anyway.

Thought you sold it?

thanks for the reply steve

change my mind once again, it will be going on now

I understand antilag isnt really needed on the turbo, but its a nice extra and i've already bought it now manily uses it for drag/track uses and i do that once i month if im lucky. im hoping with only running it a few mins a month everything should hold up

[EVL R33]

Michael,

I've got an Autronic going into my rex with AL and Rotational Idle. I'm still unsure whether i'll be hooking the AL up at all, but my plan if I do is to see if I can have the warning light on my Defi EGT gauge hooked up to the AL and if it comes on it will switch the AL off...

Might not be possible but I think it would be a good safety measure to keep the temps down...

cheers

Brett

[Kaido_RR]

Michael,

I've got an Autronic going into my rex with AL and Rotational Idle. I'm still unsure whether i'll be hooking the AL up at all, but my plan if I do is to see if I can have the warning light on my Defi EGT gauge hooked up to the AL and if it comes on it will switch the AL off...

Might not be possible but I think it would be a good safety measure to keep the temps down...

cheers

Brett

thanks brett let us know how it goes if you end up hooking it up.

looks like i might have to invest in a good temp gauge

ps im the dude that bought ur plates i think antilag and evl go together

[paulr33]

i would suggest speaking to GCG or a turbo repair shop and ask for the common failures that occur with antilag and how much its going to cost you to rebuild the HKS core as it could be quite costly, and likely to fail

[Kaido_RR]

i would suggest speaking to GCG or a turbo repair shop and ask for the common failures that occur with antilag and how much its going to cost you to rebuild the HKS core as it could be quite costly, and likely to fail

i keep hitting a wall when i think about AL and turbo failure.

I've seen 1st hand, my friends wrx running antilag for over a year without a problem or turbo failure. now he didnt run it all the time but he did run it a fair bit.

Im not saying that it wont cause wear.... just seems like the wrx/evo seem to be ok running it

[2BNVS]

i got an autronic sm4 going in atm (rb25/30) setting it up with anti lag and launch controll etc, so ill keep ya posted on what i reckon about it when i get to drive it

ben...

[R31Nismoid]

' date='4 Apr 2006, 05:25 PM' post='2070974']

I've seen 1st hand, my friends wrx running antilag for over a year without a problem or turbo failure. now he didnt run it all the time but he did run it a fair bit.

Im not saying that it wont cause wear.... just seems like the wrx/evo seem to be ok running it

Every setup is different.

Fundamentals are the same... but each setup you should talk yo your tuner/performance mechanic about as ultimately they are the ones doing the work

[Kaido_RR]

just to update everyone, i got my antilag today, but it wouldnt be going on untill i get a tune which isnt due for a few weeks

i take some photos of the unit and post them up later tonight

[Kaido_RR]

here are some photos for the people interested

[Kaido_RR]

though i give abit of update on this topic;

I got the Antilag Install but had issue because i was running a Apexi PFC Ecu, so i contacted GRiD and they informed me that the chip needed to be rechip and then it should work no problem. So i sent it off to japan and few $$$ later i had it on the car and it finally works.

What i found was interesting it is not a true anti lag but a misfiring system. Now I've tested it a few times and so far I've found

At Drags: Works good for launching i am able to setup the system to activate between 3000-4000rpm, as soon as i'm on the gas boost comes on very hard and fast (almost no lag) unfortunately my lsd is very worn and i wasn't able to take full advantage of the system because i was getting lot of wheel spin

At Mc: Works great, the track is a short track with top speed being max of 3rd gear (alot of 2nd gear turns), i found setting the system to 3000-4000rpm gave me the best results, mid turn i was able to jump onto the gas and feel less lag compare with not running the system.

On the Street: It does not work at all, just has the affect of making huge flames out of the exhaust.

I found that the car generally got hotter on runs when the system was on compare to when the system was off, of course there was the huge flames out of the exhaust (no issue with burning my rear bar or boot)

To Summaries:

I found the system to works BEST when on full throttle, so the system works good on the track but on the street it doesn't help in reducing the lag.

Cheers Michael

ps hopefully i can get some videos uploaded of the system working on the car when i was at mc

[Trav33]

Can i ask a newbie Q.... how does anti-lag work?

is it changing timing, or stopping spark, or what?!!!

[jnr32r]

Antilag works by retarding timming and injecting extra fuel, it virually ignites the fuel right at the end of the stroke and therefore creating a "huge" explosion, this promotes the turbo to spool up at lower revs and under no load.

For those of you with AL what settings are you using and what boost do u get in relation to RPM?

Edited May 16, 2007 by jnr32r

[discopotato03]

It sounds to me like the system he's using is what David Vizard thought up and called Electronic Boost Lag Eliminator . The launch part of that system uses a two stage rev limiter which controls rpm by degrading and retarding the ignition timing . At a pre set inlet manifold pressure the limiter changes from low to high ie launch revs to maximum desired revs . In operation it means the driver can sit on the line with the acceleratoor floored and the primary ignition timing limit used to hold the engine speed at the desired launch revs . In this state the engine is turning fast enough to generate enough exhaust gas to spin the turbine and make measurable boost . DV managed to get 8 lbs of boost with his car stationary in neutral and this was with a low tech 2L Ford SOHC iron lump carburetted (atmittedly at 8000 revs !) .

I reckon if you could get an aftermarket management system to retard ignition at certain revs and wide open throttle/s you could probably generate enough extra exhaust flow to pull the boost threshold down a bit . I also think its easier (not necessarily cheaper) to size the turbo to suit the application and take the flow restrictions out of the system - both sides .

As for the Turbo HKS has not done everyone any great favour by only offering that GT2835 Pro S in the largest available compressor trim (56T) in that wheels family .

Enough of my theorising . It would help if you'd tell us what exactly your power curve feels like and where its not to your liking . If its on a road circuit and the boost threshold is too high maybe something a little smaller like a GT2530 would suit your cars weight and gear ratios better .

Food for thought Cheers A .