Quote:
Originally Posted by A1337STI
Nice well all except the running hot bit, damn turbo cars.
The handling sounds nice, your vibrations seem like too much.. ugh drinking coffee might chip a tooth!
Do you think air through the radiator is colliding with the air from the hood scoop making the pressure behind the radiator a bit higher than ideal? I know you mentioned how the factory under hood tray , is there to assist in lowering the pressure behind the radiator but i wonder if its still "enough" at track speeds ?
I'm wondering what an absolute pressure gauge would be reading , behind the radiator at various speeds (ramping up to track speeds) ?
or is the factory setup just not quite adequate for a track day in august ? (radiator a touch too thin ) ? hmm
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Well, on my WRX I think I was definitely having an issue with the hoodscoop. Without a TMIC in there, there was nothing to prevent the scoop from pressurizing the engine bay which in turn reduces the airflow through the FMIC, oil cooler and radiator up front. I've since then blocked off my hoodscoop, but I haven't run the car at the track since then, so we'll see if it makes a big difference. With the Outback, the TMIC there should back up the air enough I wouldn't think the hoodscoop could raise the engine bay pressure excessively.
Now there were the rumors back in the day about the bugeye scoops not being able to get adequate airflow at speeds over 100mph. First, I have no idea if that rumor is true, or if it even would apply to the newer Legacy style hoodscoops. But more importantly, at the track I'm only over highway speeds in just a few spots, and even then I'm only at those speeds for short periods of time. So the likelihood that "track speeds" make a significant difference in the cooling aero of the car is pretty slim.
Really, I think the issue is that the car's cooling system, when working exactly as designed, simply can't handle running hard lap after lap in Fernely's high-altitude, high-heat, low-humidity conditions. A small front-mounted oil cooler would probably make a 10C difference though, which would be plenty for the wagon at the track. But on the other hand, I really don't need to run hard chasing a Miata around in the first place... if anything, driving slower is better for my student anyway (though for whatever reason, my student seemed to make much more progress right *after* the session where I drove harder than he did in previous sessions... but it could have just been that by the end of the day everything finally "clicked" for him behind the wheel).