Q: I’m building a Ford 302 engine, and I’m looking at camshafts. I’m curious—why did Ford change the firing order on the 5.0L (302) HO engine?
A: This question gets a lot of mileage on internet forums, and there’s no shortage of speculation on the subject.
According to Ford Motor Co. engineers, the 5.0L H.O. adopted the 351W firing order (1-3-7-2-6-5-4-8) to improve the intake manifold sound quality. Ford’s 5.0L H.O. has a distinct sound that benefits greatly from the addition of a cold air intake system and a pair of chambered mufflers.
Check out the V8 firing order chart and see how the 302 and 5.0L H.O. (listed below as the “5.0L EFI”) compare.
This is another in a series of weekly Q&A Mailbag sessions with Summit Racing‘s tech department, in which there are hundreds more. Click here to see them all.