25 replies to this topic

[JETGSR]

I'm not sure if i'm aloud to post links to youtube but I was board the other night and stumbled onto this

brings a hole new meaning to antilag

It looks like if the foot isn't on the accelerator it must go bang!
sounds like new years day at 12:00.01am but in the scrub!

[jack be nimble]

Pity there no roads like that close to me. (

I wonder if I can put a hairpin in the driveway

Edited by jack of all, 18 March 2012 - 10:20 PM.

[Velocity Racing]

brings a hole new meaning to antilag

It looks like if the foot isn't on the accelerator it must go bang!
sounds like new years day at 12:00.01am but in the scrub!

You need to go specatate at some rallies! pretty welll every decently quick 4WD turbo would be running antilag like that!

pretty cool piece of road however...

[evo-gsr]

The local wildlife would love that Im sure!!

[Trippy]

If you like that wait till you see my ix and pro Evo at jambo. My ix has been off the road since Xmas getting a whole lot of loving and getting my new drag car ready.

[JETGSR]

so can you run antilag like that on a BB turbo

I've heard it destroys them pretty fast.

[Trippy]

I will only be using it for launching sounds insane. If you use it all the time it's not the best

[Evo-00x]

You could AK-47 a spectator whilst an evo is driving past and no one would be the wiser

[caged]

Iv never killed a turbo with antilag/aggressive 2 step but have killed valves on 2 separate subaru's. bent 7 at one race meet with a too aggressive set up haha love it.

[jack be nimble]

Iv never killed a turbo with antilag/aggressive 2 step but have killed valves on 2 separate subaru's. bent 7 at one race meet with a too aggressive set up haha love it.

how/why would it bend valves do you think? or was it too aggresive in the cam timing?

[blackvr]

how/why would it bend valves do you think? or was it too aggresive in the cam timing?

If the valve springs are a bit light on, and hydraulic lash adjusters are being used.... the backfiring etc can
allow the lifters to pump up, hold the valve open and make contact with the piston....

[caged]

If the valve springs are a bit light on, and hydraulic lash adjusters are being used.... the backfiring etc can
allow the lifters to pump up, hold the valve open and make contact with the piston....

That was my diagnosis on the first one, both did have big kelford cam's and matching springs. Second car (In video) was solid bucket's with kelford drag cam's and matching springs, spring heights had been checked and also checked for binding. This one broke every exhaust valve spring and bent valves (very slightly), I assumed the exhaust pressure was skyhigh and blew the valves open. Iv only ever had it happen to subaru's, We are very hard on them and as you can see in the video lol, it was after a race meet and all the boys were on the piss.

[JETGSR]

OK .. I have kelford 272 cams 2.4 stroker and afairly modified GT3076 BB turbo on E85

if I were to set up my haltech ps1000 to run antilag (not super agressive) would that be feasible? car is going to be used to hillclimbs/sprints and track days.

No dirt all tarmac

[caged]

OK .. I have kelford 272 cams 2.4 stroker and afairly modified GT3076 BB turbo on E85

if I were to set up my haltech ps1000 to run antilag (not super agressive) would that be feasible? car is going to be used to hillclimbs/sprints and track days.

No dirt all tarmac

Wouldnt bother on tarmac, Just set up 2 step to get up on the launch.

[GSRWRC]

Wouldnt bother on tarmac, Just set up 2 step to get up on the launch.

Disagree, Antilag in a Hillclimb/Sprint where you're on/off the throttle all the time would have a huge advantage. This is why Rallycars use it. While a good launch might net you half a sec, the instant response Antilag gives over several kms would gain you more.

Not much use on the Circuit though, where its pretty much WOT, or braking.

Edited by GSRWRC, 27 March 2012 - 08:42 AM.

[CYBORG-X]

some people remove fuel cut on decel, and tune in with antilag so on decel the turbine speed remains high, that way when they tramp it out of a hairpin or tight corner it has no lag time

[Velocity Racing]

problem with that setup it its not true anti-lag and doesnt really do much other than make a few pops from the exhaust. You need a source of air to alow the fuel to combust, so that means either the throttle being cracked to remain partially open (10-15%) or a secondary air valve etc. The timing is retarded so that the fuel is ignighted whith the exhaust valves open, creating a lot of exhaus gas flow. But because the ignition is so retarded the combustion doesnt make any torque so the engine still decelerates.

Driving the car with and without the ALS turned on, the throttle response is impressive and very noticible when compared with no ALS.

Problem is that you must be either 0% throttle or more than say 50% throttle, or its just impossible to drive!!

Edited by Velocity Racing, 27 June 2012 - 11:20 PM.

[JETGSR]

So back to the original question?

would it shorten the life of the turbo/valve train terribily?

like i said not aggressive just keeping that turbo spinning 10psi - 15 psi - it's making over 300 @ 15psi so I'm sure It will pick up pretty quick being 2.4 also.

Also 2 step will probably break something. I smashed a rear drive shaft, center diff, and output shaft at the drags

[DOUGMO]

yes

[bazeng]

Yes it will shorten the life but do it anyway.... Life is short