For some reason they seem to like the cold a bit better than those cold blooded evo's. ;O) I'd have to say the reason they take so much longer to warm up is the aluminum cylinders shed heat faster than iron does. At least that would be my guesstimate. I'm usre someone WAY SMARTER than me could answer that better though.
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Doin' Whatever It Takes To Keep On Puttin' From Cradle To Grave*