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i am one of the few that has run both and in my case they were on the same exact engine. flat out, the DTM cooled MUCH better on my engine. with the 911 is was running 325-350 with a 50 degree swing between heads at times.
i just put a few miles on my DTMed engine. ran 90mph up a 30 degree hill that is about 3/4 mile long and the heads were dead even at 260 when we hit the top.
just stating facts. i love the look of the 911 shroud, but the cooler the heads, the more HP you get.
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