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Originally Posted by SaabTuner
I like WRX's along with most turbo cars, but I kind of chuckle at the 1600 degree EGT limit ... most of the Saab tuners out there tune for a "conservative" 1700 for a street car. Suprisingly I've not heard of many turbo meltdowns...Adrian~
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The Rex has a "pre-cat" before the turbo. That's the main reason you need to keep EGTs down, or you can end up with abrasive ceramic chunks in the turbine blades. If you replace the up-pipe with a catless one you have more leeway with temperatures. It's illegal to replace it, of course. My guess is, Saab hasn't introduced that sort of self-destructive idiocy into their engines yet. Oh, sorry, it's not idiocy, it's just 20 more seconds of cat exhaust scrubbing before the main cat heats up enough to work efficiently. I suppose if you live in Banff (no offense to the inhabitants of that exquisite land, it's just in general pretty cold...) or tend to drive 30 seconds to the corner store and back this is a good idea. For everybody else it's just a reliability issue that sooner or later needs to be addressed. Aargh.