You always said the JDM blob WRX V-limited is the best/fastest Impreza, Subaru made.

Here is the rare beast for sale on E-bay, get it bought!!
http://www.ebay.co.uk/itm/Subaru-Imp...4AAOSwqYBWo~LU

 

Good find

I thought Matt would have bought it by now

 

The best Impreza but still has poverty spec brakes.

Also, those wheels are dwarfed by the arches, it looks wrong.

 

I`m kinda swaying towards the Hawkeye Spec C recently but if you're not bothered about going over 400bhp (WRX equivalent 350bhp) or track use then WRX V-Limited is the Impreza to buy. STi looks with WRX efficiency and running costs. Smaller brakes have benefits over larger such as moderate weight and rotational mass savings, but they need upgrading for fast road use. I can imagine with AVCS, TDO4 and remap to 1.35bar the car will be an animal to 90mph.

I`d like to say it`d be my next Impreza but the redline, looks and durability has been making me lust for a hawk spec c.

Though limited to 350lbft I understand a jdm WRX can handle more bhp than the UK spec due to better piston rings?

 

What tosh. Have you ever felt the weight difference between steel WRX brakes and aluminium Brembo STI brakes? STI calipers are quite literally half the weight.

Rotational mass is slightly in favour of the WRX, but that's traded off as the brakes are almost useless.

 

Shame your hands don't come with an digital read-out as I'd like to know. I think the front disks on one of the newer STi's weighs 10.2kg each no wonder it manages 5.5secs to 60 and the WRX 4.8secs with 40bhp less!

I'm not sure of the weight difference between pads/disks on the two Newages but apparently the breaking torque force isn't too dissimilar, it's just that the Brembo set up manages heat/fade better. Since I upgrade the fluid and hoses on my 333bhp Newage I've never suffered fade, my disks and pads are still stock! even when Colin 'Brewitt' McRae showed me what a WRX can do on a country road, no issues. I doubt there are many stock engined Newage WRX's faster than mine on stock disks/pads, so it's not a bad benchmark...

 

your driving it like a big jessy then

 

You're an idiot Matt. Yes, I'm sure the weight difference of the front discs means a WRX can accelerate to 60 a whole 0.7s quicker than the STI.

Same old broken record from you I'm afraid. We are all tired of it.

I'm not even going to waste my energy commenting on your 2nd paragraph as I've said it hundreds of times before.

 

 

It's quite significant and the rears will be heavier too obviously, companies like Perrin claim a 10bhp improvement by just fitting a slightly less heavy crank pulley!

 

Only in your world could that ever actually seem like a sensible statement. In the real world there are no benefits to having smaller brakes.

 

Had a very bad crash on a corner. That's why I run a franchise on 0-60.

 

Thats explains why your brakes are fine then.

most people go 0-60 then back to 0,,,, lol

 

Go on then, explain to us all the engineering principals by which a lightweight pulley will increase engine output.

 

Other than lower maintenance costs, improved fuel economy, less rotational losses and weight savings.

I'd personally see no benefits at all from going bigger, especially now I'm at Classic weight, I only use the car for drag racing and if I meet another Impreza at the traffic lights it's over before the speed limit, I've never taken a corner at 10% over the speed limit since 1998, I see the Impreza as a car designed primarily for traction, there's no point in hanging around at over 70mph as it'd not really the Subarus strong point, my car leaves a Focus RS for dead from a standstill, but get one level with you on the motorway at 70mph, don't bother! Obviously if someone wanted to hit the track or drive fast on the public roads for long spells then it would be a consideration to go bigger.

The problem with SN is you're all rally drivers!

 

The Perrin pulley has a smoother finish than the OE iron ones so it spins through the air faster. improved drag co-efficiency or something.

 

Come on Matt, seriously? I don't see Ferrari / Lamborghini / McLaren etc putting small brakes on their cars. They All have huge caliper and disc setups because they are required to haul the car down from speed quicker and to help dissipate heat. Companies spend millions trying to get extra BHP from their cars, don't you think that if putting on smaller brakes would be both beneficial in terms of braking efficiency and give an instant 10 bhp gain, all hyper-cars would be sporting the braking setup from a 1.0 fiesta?

 

weight reduction lowers the engine�'s reciprocating mass, improving acceleration and enhancing engine response

 

Are you kidding me, you don't touch the breaks after hitting 60 in 2.9 seconds. You let off the throttle and slow to cruising speed.

 

The difference you're talking would be so miniscule it's barely worth quantifying.

Neither of which will increase the engine output, they'll change how it's delivered but not what it is.

 

Are you seriously comparing a 221bhp family car to the world's most coveted 200mph+ Hyper Cars? The Hyper cars have Carbon disks that probably weigh a lot less than the WRX disks so even Ferrari etc understand the importance of light brakes!

I'm pretty sure Subaru would have added a lighter flywheel, pulleys and bigger disks to the WRX if they wanted to compete with £0.5m+ cars but they were on to a winner advertising a sporty family car with 30mpg.

 

It's a WHP increase. Do they usually use the WHP figure to calculate Engine output?

 

The same stands as BHP is a function of torque and engine speed (i.e. RPM). You're not actually increasing either by fitting a light weight pulley.

If you want to be technical about it, a lightened crank pulley will reduce the system inertia. So you'll be using less of the combustion energy to overcome the inertia of the crank, so on paper you may get a (very) slight increase.

In reality this will only be a parasitic loss as the mass of the crank pulley will be tiny in comparison to the reciprocating mass of the pistons, the rotational mass of the crank itself and all the rotational/frictional losses you'd get along the drive line. So to try and claim 10bhp smacks suspiciously of marketing bollocks.

 

It certainly hit my fuel economy

Thinking about it if a lightweight crank pulley and flywheel lesson fuel economy slightly due to lower inertia (revs dropping off sharper and car slowing) how will lighter disks/wheels effect it?

 

Whether it has 50 bhp or 1000, it's relative and the science is the same. You say that having smaller brakes provide "moderate weight and rotational mass savings", so i ask you again, if this is (according to you) one of the reasons why the WRX is better than the STi, why do super cars have huge brake setups if the answer to more speed and better braking is to have smaller brakes, because this IS what you're saying.

I think you're missing the point. Yes, the WRX Brakes will be lighter, but what tiny advantage you gain in weight-saving (which is so small that I doubt even professional drivers would notice a physical advantage on) is out-gunned by what you lose in braking efficiency, which is why the STi has brembos. They weigh more, but they have far superior braking 'efficiency'.

 

Just read my initial comment re brakes again

My comment was in the context that the smaller brakes aren't a reason not to get a WRX V-limited. It certainly wasn't the tiny brakes are the sole reason to get the V-Limited WRX or that they are better than bigger brake set-ups. Apart from the 10.2kg disks!!!!

That said don't larger disks take more warming up to get to peak efficiency, which could be important in a light, low powered car that's not driving 100mph everywhere? My mates R1 bike had smaller brakes than my 4yo sons BMX.

 

You've never hit 0 to 60 in 2.9 so how the **** would you know?

 

Its still a wrx its still crap, have a great weekend gentlemen

 

Yet again another thread turns up where this fruit cake spouts ****e and winds everyone up.

Mods, BS_Matt is the only person on my ignore list yet i still get subjected to his uneducated drivel, is there a setting or something im missing?

 

he's been playing need for speed again