Quote:
Originally Posted by b-man
And it didn’t affect how it ran.
I purchased a ‘71 455 HO intake back in the early ’90s and of course it looked much worse than that iron intake and much like the current repros, it’s not like it slowed those cars down and made them run like turds.
People get too worked up about these things, some intake to head port mismatch doesn’t really matter much if at all on your average street engine.
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Yikes! That must be the manifold The Parts Place used to create their reproduction! I have to disagree some with B-man on that one though. As bad as that intake is I bet you would see an average HP loss of 5-7 HP and 10-12 at peak rpm. Would love to do a back to back dyno pull to verify. True the average new car owner would probably never know the difference but it would be there.
When I worked at the Pontiac dealer we would of course take the new cars out and run the crap out of them during PDI's. I remember distinctly identical cars running quite a bit different from each other. It all depended on whether the engine was built more or less closely to the engineers design specs. or just barely within tolerance like that manifold which probably should have been rejected, melted down and re-poured. (Must have just made it through inspection at 4:55 PM on a Friday)