Powertrain Rejuvenation: The Rules are the Limit (STX)

Powertrain Rejuvenation: The Rules are the Limit (STX)

Tech Articles
If I'm going to pull the engine for a refresh, there's no reason I couldn't replace my flywheel with the stock version and bump down to a more appropriate class for my budget. As such, I wanted to investigate how far I could go with my engine in Street Touring X. Here's what I compiled from the 1/30/2017 release of the SCCA Solo STX Rules, which can be found here. Oil Pan/Lubrication Any oil pan is acceptable Any oil pickup is acceptable NO addition of, or modification to, windage trays or crank scrapers Thermal Control Radiator can be replaced, BUT must be same as stock (or greater in magnitude) in the following areas: Dry weight Coolant capacity Core dimensions Mounting locations Any water expansion tank is allowed Silicone replacement coolant…
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Powertrain Rejuvenation: The Rules are the Limit (ASP)

Powertrain Rejuvenation: The Rules are the Limit (ASP)

Tech Articles
I have made it abundantly clear, because I am too honest when it comes to racing, that I've installed a lighter-than-stock flywheel in my WRX. This makes me ineligible for the stock, or even STX SCCA classes, and relegates me to A-Street Prepared (ASP). My car is woefully outgunned in this class, but luckily a good opportunity to change classes has arrived. When I pull the motor to do the refresh that I'm planning, I can swap back to my stock flywheel! However, for due diligence, let's take a look at all the things I can do to my engine based on the ASP rulebook.¬†The notes below are compiled from the 1/17/2017 release of the SCCA ASP rule set, which can be found here. Oil Pan/Engine Lubrication MUST retain standard…
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You Don’t Need $70/L Brake Fluid

You Don’t Need $70/L Brake Fluid

Tech Articles
When I bought¬†slotted rotors, autocross brake pads, and stainless steel lines I wanted to make sure the upgraded braking performance wasn't going to outmatch my regular old brake fluid. As I was looking at brake fluids I realized that I had no way to decide what boiling point was appropriate for autocross. Did I need 660F brake fluid now that I had super grabby brake pads? Would they really generate that much more heat? A brief hop around the forums didn't reveal much convincing evidence, so I decided to apply some science. I bought the "best value" brake fluid I could find and some temperature labels, and I hit the track in the middle of the summer. (more…)
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