Car upgrade path
Wednesday, March 1st, 2006There is a good chance that in the coming months I am going to have a bit more disposable income than I have had. That has led me to start thinking about what I would like to do to my WRX. If I am going to write this down anyplace, I figure I will put it out in the open where my friends can heckle my logic.
Overall Plan:
- Fix cooling system
- Monitoring
- Up-pipe, downpipe, maybe headers
- Engine Management
- Suspension
- Serious Engine Improvements
Fix cooling system
Basically since I have bought my car I have been having some problems with my cooling system. I am pretty sure that the last owner was not very nice to it. I have had to replace one coolant line, and I currently have a slow leak in another line. My plan is to replace most of my accessory coolant lines with Samco silicone lines ($140) and my radiator hoses with Samco silicone lines ($130). That should get rid of pretty much any line that is not in good condition.
I also have a new STI radiator cap that raises my coolant pressures from 0.9psi to 1.3psi. I have not put this on yet because of the slow leak. Finally, I will add a radiator shroud ($50). This work will mean my cooling system should be reliable, and more effective than stock. Gotta keep this sucka cool.
Monitoring
Before I get crazy with my engine, I need to get the tools to ensure that everything is running within reasonable specs. First up is compression testing my cylinders (~$30) when I replace my spark plugs. Man do I pray all is well when I do that (~150psi with little variance cylinder to cylinder).
After that, I am thinking EGT, oil temp, and oil pressure mounted where my clock currently is (~$400 for gauges, senders, housing). A knock light would probably be a good idea ($130, doubles as shift light).
Up pipe, down pipe, maybe headers
Up pipe with flex and without a cat (~$150). Man I don’t know who thought it was a good idea to put a cat 3″ from the intake side of my compressor turbines. Downpipe with a cat ($400-600). My existing cat back exhaust is the Bosal STI exhaust (3″), so hopefully that will be high enough flow to keep me going for a while.
Headers are a harder question. You can get them for ~$400, but there is a lot of argument in the WRX world of how valuable they are. It depends a lot on how much power you hope to get out, and whether you are looking at top end or low end power. The stock manifold is cast iron and nasty. This is low priority until I see some dyno numbers that are convincing.
Engine Management
Here we go. Throw this into the mix and I can start making some serious power. I am thinking probably a Cobb Access Port ($595) and at this point I will be able to pop in the stage 2 map and get something on the order of 220 lb-ft of torque at the wheels, up from 175 lb-ft stock. That move requires all of the above upgrades, but 50lb-ft for $2000 sounds good to me.
Engine management is key on my car. Getting a 2.0L engine to put out big numbers requires balance that hacking together a fuel controller and a boost controller just can’t safely give you.
There is a chance that I will spring the extra couple hundred bucks for the TurboXS Utec, but I am not seeing a huge need for that.
Suspension
Why is suspension way down here? I am not sure really. Maybe it should be up right under monitoring. All the suspension parts I am looking at (except coil overs) are pretty cheap, so I will probably start piecing this together along the way.
New swaybars front and rear ($150-300), new sway bar end links ($250), front and rear strut tower braces ($250). Those would be good starts and are cheap enough to throw in one at a time. Probably something like Prodrive coil overs ($1300). I could do new springs and struts and save a couple of hundred bucks.
Wheels and tires will need to be replaced as well. I would replace my current wheels because they are ugly and don’t clear any of the brakes I would buy. Maybe some high clearance 17″s, or a set of the stock BBS 18″s used off an STI. Tires? Who knows, but something better than flimsy stock tires.
That is it. Keep in mind this has been my dream car since before they started selling them in the US. I have no intention of getting rid of my ‘03 anytime soon, so that means I can spend some bread playing.
(I wonder where I should put driver skills?)
gnubbs