[Formulajones]

Anyone do a header test like this with a 4 pattern camshaft, or simply changing the firing order around? 4-7 swap?? LS firing order??

Far as I know, the 4 pattern cams and LS fire cams are only available for SBC and BBC and SBF.

[Dragncar]

Originally Posted by Formulajones

Anyone do a header test like this with a 4 pattern camshaft, or simply changing the firing order around? 4-7 swap?? LS firing order??

Far as I know, the 4 pattern cams and LS fire cams are only available for SBC and BBC and SBF.

4-7 lobe swaps are available on 55mm cam for Pontiac. Not with std journal. 50mm, not sure.

[Formulajones]

Originally Posted by Dragncar

4-7 lobe swaps are available on 55mm cam for Pontiac. Not with std journal. 50mm, not sure.

They are available standard journal. My father is running a Lunati 4-7 swap in his.

But my comment was more related to BBC, SBC that the test was done on because those engines also have the LS firing order cam core available as well as the 4 pattern camshaft available, both of which aren't available for Pontiac that I'm aware of, and since the test was done on a BBC anyway, it had me curious. Just seems to me that would make a significant difference in header choices.

[bendutro]

Originally Posted by Dragncar

4-7 lobe swaps are available on 55mm cam for Pontiac. Not with std journal. 50mm, not sure.

The cam I just received from Bullet cams is a 4/7 swap. The blanks are OTS even if the grind is custom.