Testing the HiRev 7500
:thumbsup:
Without having access to internal memos and documents its hard to know if any changes in the curves were due to performance goals or simply response to changes in engine design and emissions goals.
Got to go to '67 for US 49 state non-emissions timing curves in the shop manuals (or Sun cards, etc).
Electronic ignitions came in mostly 1972 and 73 model years.
Here's a couple of comparisons that are interesting.
Exactly!
:thumbsup:
Maybe.
Without having access to internal memos and documents its hard to know if any changes in the curves were due to performance goals or simply response to changes in engine design and emissions goals.
Got to go to '67 for US 49 state non-emissions timing curves in the shop manuals (or Sun cards, etc).
Electronic ignitions came in mostly 1972 and 73 model years.
Here's a couple of comparisons that are interesting.