Quote:
Originally Posted by tjs72lemans
It's a 400 (1972) with only one heat riser. The flaps are both open and it's 40 degrees and car off. I can reach in and move them by hand, so they're not froze or sticky. Why would they not be closed at that temp?
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The vacuum diaphragm might be junk. Attach a vacuum hose to it and pull vacuum to check it.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
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