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Old 02-02-2009, 04:02 PM   #1
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Hi,

I broke my mach 427 engine in with tinfoil around the head to keep the temps up. Should I tune with the tinfoil on also or should I take it off??
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Old 02-02-2009, 04:05 PM   #2
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Old 02-02-2009, 07:13 PM   #3
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Originally Posted by rgrassey@me.com View Post
Hi,

I broke my mach 427 engine in with tinfoil around the head to keep the temps up. Should I tune with the tinfoil on also or should I take it off??
+1 on taking the foil off. You had the foil on to help heat cycle the engine during break-in.

But... if you're running outside in the cold winter temps of the 20s - 30s than you may want to keep a bit of the head covered to keep the temps in the low 200s.
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