Posts Tagged ‘ Subaru WRX ’

Project STI – Greddy Boost Controller Install

With the new engine up and running I had a bit of a scare one night as the turbo over-boosted. Afraid of hurting my new engine, I decided that the old bleeder valve had to go.

For those of you unfamiliar with bleed type, or manual, boost controllers, they are good for a small boost increase but are prone to over boosting when turning up the wick a fair bit from standard and in cold weather.

After consulting a few people in the know I decided on the Greddy Profec B electronic boost controller, and here’s how to install one in true Shift Up style:

1) Take all the parts out of the box. Place them in a neat fashion on the garage floor and take a photo.

 
 
 
 
 
 

2) Check that Rally Pig approves.

3) Remove dash, lose one screw in the process.

 
4) Find a spot to mount the control unit. It’s impossible to read the display if you can’t see it straight on so I opted for the space under the head unit using the supplied double sided tape.
 
5) Now find a power source. Being a car nerd who’s had too many Imprezas and knows exactly which wire you can get power from makes this step easy. Failing that, I’m sure a wiring diagram for your vehicle type will help; see interwebs.
 
6) Once a power source has been found, connect the red wire to it and the black wire goes to a good earth – make sure you solder the wires and use shrink wrap stuff or I’ll be very upset with you.
 
7) I drilled a hole in the back of the dash piece where the unit will sit so I can get the power wires and the vacuum hose through to the back – smart huh.

8) Run the wires and vacuum line through the rubber grommet in the fire wall and into the engine bay. On a GC8 WRX this is located above the clutch pedal and comes through just under the clutch master cylinder.

9) Mount the boost control solenoid in the engine bay. I chose to bolt it to an existing bracket which holds the factory boost controller.
 
10) Plug in the wiring harness from the in-cabin controller and connect all the vacuum hoses. Keep them as short as possible. Check the manual for specifics as what goes where varies a bit from car to car.
11) Once you’ve double-checked that everything is where it should be, you’ve earned yourself a five minute break.

Smoke if you got ’em…or down a Red Bull.
 
12) Time to turn the key and set it up. The supplied instructions are good enough to get you through the setup process. A couple of hints I’ve picked up though are: try and test in all gears – luckily we have a ‘private’ road handy for just such occasions; when accelerating keep a sharp eye on your boost gauge (or get a friend to help) and accelerate gradually, if you just floor it you might not have enough time to back off if you get too much boost and possible detonation; adjust “set gain” to 4psi below the desired boost; adjust “gain” to ensure boost is holding all the way through the revs; adjust “set” by 2 per cent increments until desired boost is reached.
13) Give yourself a pat on the back and enjoy consistent boost levels! And try and find that lost dash screw.

Keep it rubber side down,

Benji

Project STI – Pear Shaped

So it’s been a little while since I did the brakes and wheels and I absolutely love it.

The car has been transformed into a proper all round package. The grip and brakes match the power and it’s just a joy to point at a twisty road. But it’s a modified car. And there’s no “happily ever after” in these stories.

One afternoon I was casually driving down the freeway when all of a sudden the engine started to sound like it was full of ball bearings. I didn’t need to pull over and pop the bonnet as I already knew what had happened – it was definitely the all-too-familiar clunking of a bottom end bearing failure. Just to add to the drama, I tried to restart the car after pulling over but the battery was completely dead. Not even a jump helped, so I had to enlist the help of Dave and the ever reliable Polo GTI to fetch us a battery.

We got Koop started and then nursed him home trying to keep the revs low, now I know I probably should have gotten a tow then and there but I figured it’s already broken.

A week later Koopa was towed down to Subaru for the damage to be assessed. It didn’t take long for them to confirm what I had suspected; the bottom end was scrap. Luckily both heads and the entire top end were undamaged. Faced with a few options for a new motor I needed to do some homework.

The now broken motor was a re-built ’99 STI 2-litre which was stock save for forged Wiseco pistons which were 40 thou overbore. This engine always had very loud piston slap and used a lot of oil so I’d like my new motor to behave more like a factory item this time. Seeing as the stock STI motors already have forged pistons from the factory I didn’t see the need for an aftermarket re-build this time considering I’m not after big horses.

The 2.5-litre EJ25 has become a very popular engine swap for the older 2 litre models. However I have driven a 2008 STI sporting said motor and it’s very linear all the way through the revs compared to the 2 litre. I found it to be very underwhelming as it never delivers that turbo punch that I want from an Impreza. And even in STI form it doesn’t have forged pistons and only revs to a lowly 6500rpm redline. There’s nothing actually wrong with it but it doesn’t feel like a Japanese performance car motor should, I want high revs and aggressive power delivery.

So a new 2-litre it is! The only slight problem is that Subaru Australia doesn’t have any replacement 1999 STI motors anymore. Luckily though they do have Version 7 (2001-2004) STI short motors in stock which are identical to the original 1999 motor except for the deck being semi-closed instead of open; making it stronger and lighter.

A surprisingly quick two weeks later and Koop was back with a brand new motor. After some gentle running in it was off to the dyno for a tune. The end result is 180kW at all four on 20si. On paper that number seems a bit low but as a comparison, its previous tune saw 201kW atw on 18psi and the car is much quicker now. It just goes to show how much you can’t compare different dynos.

Benji

The Time Is Now

Heads up folks, here comes a fat rant. Deep breath in, and…

Driving in Melbourne over the past few years really has become tedious. The growth and population of the city is too big for the archaic road system to keep up meaning there’s pretty much always traffic on the main arterials. But that’s not really what’s bothering me. What I’m completely fed up with is how terrible most of our citizens have become at driving.

Our strict enforcement of speeding (+3km/h) has slowly bred a city of people happy to drive around like zombies, 10km/h under the limit. Anybody who tries to drive at or (heaven forbid) slightly above the limit is labelled a ‘hoon’. To combat these ‘hoons’ the police can impound or even confiscate their cars.

These pathetic laws are a knee-jerk reaction of a baffled government who can’t figure out why the road toll won’t go down.

There are two main culprits here; poor driver training and poor mindset. The wrong attitude to driving or not knowing how to drive is a recipe for disaster. A lot of this poor mindset with younger people comes down to parents not taking enough interest in driver training for their kids. Too often kids are just sent off to a driving school to learn how to drive. Most of these driving schools have instructors who are very good and teaching people how to pass their driving test and not how to drive ‘properly’.

Our media helps no end in fuelling this mentality too. There are countless examples of ‘experts’ in the media claiming that advanced driver training leads to overconfidence on the roads. Mark Skaife and Ian Luff, two former competitive racing drivers, have both copped flak for their justified criticism of our outdated licensing system. How is teaching people how a car behaves when stuff happens a bad thing? Can you imagine if we had the same ideas on teaching children about water safety and swimming? Better hope little Billy never finds himself in the water as we didn’t teach him how to swim just in case he’d get overconfident around the water!

When I went for my licence I was well prepared due to my parent’s active role in teaching me. There are countless good habits my dad taught me which my driving school instructor never did. Things such as not changing lanes in front of a truck when approaching a red light as this greatly reduces its stopping distance – if you don’t understand that a 40-tonne truck needs that room to slow down safely and you cutting in reduces his required stopping distance then you shouldn’t be driving. So did I learn anything from my driving instructor? Yes, I learnt to turn my whole head when checking my mirrors so the tester knows I’m doing it as I was wearing sunglasses during my driving test! Ridiculous isn’t it?

All I did on my test was tool around in 60 zones for about 10 minutes and then do a ‘straight line reverse’, which required me to reverse 30 meters without hitting the kerb. I think this manoeuvre is quite useless and actually a bit dangerous. Why would they encourage me to reverse down the street? Wouldn’t a U-turn be better? Either way, did I have to demonstrate my ability to react in an emergency situation? No. How about merging onto a freeway in heavy traffic? No. How about driving at night in the rain in the country? No. How could any logical person believe that our system is good? Why we don’t use a similar system to getting a motorcycle licence I don’t know. It would at least be a good place to start.

VicRoads did actually tweak one of their laws late last year. What was it I hear you ask? Something clever and productive? Nup. They added the BMW M3 to their banned cars list for Victorian P–plate drivers – someone over there finally figured out that it’s a fast car. Genius! A Lotus Elise however, provided it’s not the supercharged version, still ok!?

A 300kW HSV is no more dangerous than an 80kW econo-box before a human takes control. A car is entirely harmless on its own!

We avoid teaching our kids how to drive properly, instead relying on endlessly (and it would seem somewhat pointlessly) spruiking the same naive rhetoric that keeping kids out of ‘hoon’ cars and insisting they don’t speed will somehow prevent accidents. A driver with the wrong mindset will drive irresponsibly regardless of a car’s power figure.

There are countless little things that people do on our roads every minute of every day but because people generally aren’t taught the nuances of safe driving they go unnoticed. How often do you see somebody unable to keep in their lane? How many times do you see people change lanes with no comprehension of the closing speed of other cars or without using their indicators? Our focus is far too narrow when tackling the issue of road safety.

I bought my first WRX when I was still on my P-plates and I was allowed as there were no restrictions back then. So there I was, a young male in a quick sports car yet I didn’t wrap myself around a pole at 2am. Why? Mindset. I respected the performance of my car and appreciated that you can’t drive around utilising said performance all the time, that’s what race tracks are for. I was also taught things that I’m sure a vast majority of drivers we share our roads with have never even thought about; how to correct understeer and lift-off oversteer and how to brake properly in cars with ABS and in those without it.

I’m really not trying to be a hero about driving here, all I’m saying is that we should find it alarming that we give out licences to people who don’t understand the basic physics of how a car works. Do me a favour and ask your spouse/friends/co-workers if they know what tyre pressure their tyres should have, which wheels are the driven ones and if it has ESP/ABS and what that all adds up to if they find them selves in an emergency situation. I bet most won’t even think it’s information they should know.

We share our roads with far too many people who see driving as boring, brain-off time in between whatever else they are doing in their busy lives. Recently in Victoria we had three separate car crashes over a weekend and the media were reporting that “speed was a factor in two of the three incidents”. What about the third one? They don’t report it as “driver error” or “the car had cheap, shit tyres”. Don’t get me wrong here I’m not condoning speeding, I’m just pointing out that we only ever blame speed for a crash. When speed isn’t the cause we shrug our shoulders and move on. When a car load of teenagers crash we say, “bloody hoon dickheads”, but when a family has a crash on the Hume Highway (as seems to happen every long weekend) we say, “how sad but it happens”. We don’t have to lose a single life on our roads but the government needs to stop avoiding the issue and tackle it once and for all.

Let’s start by impounding low performance drivers not high performance cars.

Benji

Click here for a map that shows where and how road deaths occurred in Victorian between 2008 and 2011.

Click here for a grasp of poor mindset.