Explorer 5.0 Valve Covers

[DirtDonk]

With literally hundreds of cams out there with similar rpm ranges, I'm sure there are plenty that are both "worse" and "better" so to speak.
First, I think the 303 cams have a 110° lobe separation angle (or is that lobe centerline? I forget) and the Ford EFI setups tend to prefer more in the 114° angle range. It's not a huge difference, but it's enough.
Maybe it makes more of a difference as the cam gets more aggressive? The B303 was generally considered to be a winner, where the the E303 was less desirable. But I thought they had similar angles and durations, but with less lift? Maybe someone can confirm that. If there is more lobe separation on the B cam, that might explain why it was generally liked more than the E cam.

The ones that a bunch of the locals here are now using is the Comp Cams 35-308-8
Some are generally happy with their 112° cams, but even more with the 114's.
One guy in the secondary thread linked to in this one: http://www.norcalbroncos.com/forum/...-cam-for-5-0-EFI-swap&highlight=best+camshaft even mentioned taking out his E303 to replace with the Comp.

Paul

 

[73azbronco]

MY research found any alphabet cam from Ford while great in a mustang, was not as good as the stock explorer 5.0 camshaft, period. Now, the only thing slightly better for the mild side was the camshafts in the 260-265 region with ratings starting at idle or 1000rpm from comp cams. Anything more and your trying for to much HP at top end vs low end tq.

 

[sykanr0ng]

The 5.0 Mustang H.O cam is not a bad choice for an Explorer engine in a Bronco if you know a Mustang guy that hasn't thrown them away.