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STI upgrade, turbo/injectors/exhaust/ECU etc. Some impossible to reach components


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It should have been a one day install but thanks to a few stubborn bolts and impossible to reach items it managed to take two. The wife was very understanding and let me concentrate on getting the job done. The end result is 393 at the wheels which is about 450 at the crank.

The fuel pump was as usual no problem to install, although the box around the strainer was an extra pain to fit through compared to my previous Impreza. That and the exhaust (3 inch turbo back) went on quickly.

 

Then the fun began.......

 

If I believed in the devil I would say that side feed injectors are his tools. You really have two very bad choices when removing them: grab them by the plastic tops and pull like heck hoping that they pop loose before the top shatters, or pry them out risking nicking the rail seat and snapping off a chunck of injector plastic. End feed injectors are so much easier. Then the joy of fitting the new ones in.... The O ring fit is VERY tight and no ammount of leaning on their delicate tops will push them in. You have to tap them into place with a small hammer and a ratchet extension. A slight coating of astro glide made all the difference in the 30 deg. weather where O rings are not very cooperative. And naturally the new injectors use a different connector than the stock ones, leaving you to install new ones on those 2 inch pigtails off the harness tucked way down in the engine.

 

The turbo was another pain. First the "kit" did not include the hoses and connectors and such that were needed, maybe it is just me but a "kit" is more than the major components. The stock VF39 came out easily and then the fun began. The oil drain tube did not bolt directly up to the FP green as was claimed, nor was it at the exact same angle to fit back into it's recepticle hose because the fitting was at a different angle than the stock turbo. More on this in a moment... For a moment I questioned if I was sent the wrong version of the turbo because it just did not fit into place willingly. The oil line was running off the block exactly where the wastegate actuator is mouinted. After some very careful bending the oil line was snaked into the tiny gap between the actuator and the engine. The inlet hose which was the only one that worried me initially slid right over the inlet and was very soft to adapt to the larger size. Where things really went south was with the oil drain hose. The way it works is the turbo has a 3 inch or so metal fitting that bolts to it, then the oil pan has a tube that turns up to meet it. Coupeling the two together is a 4 inch or so rubber hose with one of those wire hose clamp/spring deals on each end. With the turbo in place the hose and both clamps are totally inaccesable. When the stock turbo came out the rubber hose remained attatched to the oilpan. If the drain tube on the turbo were in the exact same alignement it might be possible for it so slip back in when you install the turbo. Of course this was off a bit so a bit more astro glide and allot of pushing, poking with screwdrivers, a wooden spoon and almost two hours later I had the turbo in place with the oil drain tube inserted far enough into the hose to make a good seal. The vacume fittings on the new turbo were twice as big as stock and nobody sells a size adapting T. Then there were a few IC hoses, and other misc new parts to insall.

 

The power is incredible compared to stock and the tourqe is right around 500 peak. The car is no only much faster but it is actually better in terms of driveability and transition to boost from cruise. It pulls from 65 to 100 as easily as you would go from 30 to 50. After being stuck with the Porsche all week 230 more HP and the AWD 6 spd seems like even more than it is.

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