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Old 08-21-2004, 08:32 PM   #1
mrubino83
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Default Anybody know what type of Turbo is used in the WRC car?

The name of the thread pretty much says it all. I did a search and couldnt find anything on teh turbo specs. Anybody know?
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Old 08-21-2004, 08:50 PM   #2
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I know it's an IHI turbo but I don't know which model.
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Old 08-21-2004, 11:13 PM   #3
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Bump...I think this would be interesting to know too
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Old 08-21-2004, 11:22 PM   #4
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I remember reading somewhere that they hit like 380lb/ft of torque by something like 2000rpm. Unreal setup.

Have you tried Google searching or just within NASIOC?
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Old 08-22-2004, 12:35 AM   #5
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Are you that desperate to know. Its not actually like you can really afford to apply this turbo properly to a WRX or STi!!!!

IHI 34mm Restrictor
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Old 08-22-2004, 02:11 AM   #6
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Quote:
Originally Posted by DrBiggly
I remember reading somewhere that they hit like 380lb/ft of torque by something like 2000rpm. Unreal setup.

Have you tried Google searching or just within NASIOC?
antilag possibly? Then you would have full boost around there.
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Old 08-22-2004, 02:58 AM   #7
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anti-lag, indeed....
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Old 08-22-2004, 03:08 AM   #8
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Quote:
Originally Posted by GTScoob
antilag possibly? Then you would have full boost around there.
According to the tech article the car runs idle at 2k rpm and produces 1bar of boost thanks to the anti lag system.

It also pushes out 3bar of boost at max (4 bar absolute) according to the arcticle. This thing is wild beyond any anything i've ever seen.

You wont find a model number on the IHI turbo becuase the turbine is custom designed. I suppose it was a RHF model to begin with but supposedly its compressor and exhuast turbines are far from stock.
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Old 08-22-2004, 04:27 AM   #9
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Its a real freaky design so to speak. The anti lag system is a great thing but you exhaust manifold/headers will not take extended uses. I remember somewhere one of the techies saying that they have never blown a turbo due to anitlag but they replace manifolds/headers constantly!!
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Old 08-22-2004, 04:53 AM   #10
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Probably do to the constant heat and explosive nature of the antilag system. They probably need a thicker material and passive cooling fins for it to last a decent amount of time. But for weight issues they probably don't want to.
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Old 08-22-2004, 05:02 AM   #11
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think titanium
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Old 08-22-2004, 05:53 AM   #12
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Quote:
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think titanium
Ah didn't actually think of that good call though i imagine even titanium can't handle the heat that thing is surely putting out.

Definitely jet hot coated for sure
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Old 08-22-2004, 10:45 AM   #13
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Quote:
Originally Posted by RoadSpike
Ah didn't actually think of that good call though i imagine even titanium can't handle the heat that thing is surely putting out.

Definitely jet hot coated for sure
Jet hot coated exhaust wheel? No.
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Old 08-22-2004, 01:37 PM   #14
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Titanium for engine parts = bad idea. Titanium expands too much under prolonged heat!
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Old 08-22-2004, 01:47 PM   #15
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I think you guys are trying to THINK too much and have no facts....

A bit of resesrch will yeild most anything you wish to know.....it's all been discussed before.
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Old 08-22-2004, 03:34 PM   #16
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dont know about this years car but theyve gone thru alot of VF28's
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Old 08-22-2004, 05:19 PM   #17
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Inconel>Titanium at High Heat
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Old 08-22-2004, 05:56 PM   #18
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Silicon nitride for prolonged ALS use.

The turbo is a custom, but available from pro-drive if you have the money. It's a BB core, different housing, and they also do something to allow the turbo to be operated at an anlge that would destroy most normal turbos. Compressor cover is small though, same proportions as a VF30, but different in order to take the restrictor.

Although they run very high boost, they can't maintain that boost at all with RPM, so they are maxing out the turbo, at the practical limit of the restrictor as early as possible. this gives them 300hp + from under 3000rpm to over 6000rpm, which means they always have the max amount of torque available at the wheels at any one time. Unlike a 'normal' wrx where you are only at peak power through a limited range. This is how they get such good performance on the road with relatively little power.

Paul
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Old 08-22-2004, 07:19 PM   #19
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cool stuff guys learning something new each time i reread this
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Old 08-22-2004, 08:09 PM   #20
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titanium? What the heck? Titanium is not that great of a material. It's advantage is that it's strong pound for pound, it's actually not that strong on the absolute scale of things. Same thing with Carbon fiber. Really crappy impact resistance, high tensile strength. However, it's not THAT strong, rather strong pound for pound.


So what is this anti-lag? Like 10 people have posted about talking about it in this thread but I have a feeling that no one actually knows how it works? I mean the turbo will spool up because X amount of kinetic energy is being imparted to to the turbine wheels by the gases.

So I'm assuming the anti-lag is something like that backfire option you get with some EMS's where you can run super rich and have some unburnt fuel ignite on the turbo wheels or something?
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Old 08-22-2004, 08:21 PM   #21
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Quote:
Originally Posted by verc
So I'm assuming the anti-lag is something like that backfire option you get with some EMS's where you can run super rich and have some unburnt fuel ignite on the turbo wheels or something?
yes, the technical name for a "backfiring system" or "misfiring system" is Anti-Lag, and it more or less does just that, in conjunction with timing augmentation. The primary benefit of this being that you can lift throttle and retain full boost pressure, have full boost pressure much earlier, and it mimics launch control in the sense that you can slip the clutch and stomp the gas and instantly be in the perfect part of your powerband. Very hard on manifolds/exhaust wheels.

~Tim
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Old 08-22-2004, 08:34 PM   #22
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Quote:
Originally Posted by verc
So what is this anti-lag? Like 10 people have posted about talking about it in this thread but I have a feeling that no one actually knows how it works? I mean the turbo will spool up because X amount of kinetic energy is being imparted to to the turbine wheels by the gases.

So I'm assuming the anti-lag is something like that backfire option you get with some EMS's where you can run super rich and have some unburnt fuel ignite on the turbo wheels or something?
The antilag system is quite insane. It has a special plum to feed a bit of compressed air from the turbo into the exhaust housing at the same time feeding the cylinders overly rich mixtures. This ignites and keeps the turbo spooled

I don't know much about their exhuasts and materials but there was a great post on i-club with all kinds of good info.

i-club.com/forums/showthread.php?t=69783

EDIT: GOD DAMNED NASIOC FILTERS!!! link can't work becuase of them!!!

Edit 63: finnally got around them
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Old 08-23-2004, 04:17 AM   #23
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Yes Anti-slag can be crudely implemented by setting the ignition timing to aything from 10 to 30 degrees after TDC and getting enough air into the engine to produce some serious exhaust gas. Often they idle at high rpm, with a rotational ignition cut to prevent the engine over revving, as the ALS is setup to effectively open the throttle. More advanced systems on the WRC cars as above with the secondary air system to the exhaust manifold, this runs lots cooler and doesn't burn ex valves etc, it's also much quieter. The older style of ALS is banned on some events now.

Paul
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