[charlie66]

Originally Posted by Jay S

Looks like a 433 XR from Comp, it has a lot of mid range, 9.5 to 10.5 is a good place to be. With that cam in a pump gas combo generally a bigger port will like the higher end of that range, the smaller the port will like the lower end of the range.

Here is the cam card

[Jay S]

Originally Posted by charlie66

Here is the cam card

I see it has a Bulter part number and it is ground on B lobes. It is the same cam I mentioned, the off the shelf 433, except the 433 is advertised with S lobes. It is generally ground on B lobes though and advertised as an S in literature.


https://www.summitracing.com/parts/c...1/make/pontiac

[charlie66]

Originally Posted by Jay S

I see it has a Bulter part number and it is ground on B lobes. It is the same cam I mentioned, the off the shelf 433, except the 433 is advertised with S lobes. It is generally ground on B lobes though and advertised as an S in literature.


https://www.summitracing.com/parts/c...1/make/pontiac

Haha I have no clue what that means. Hopefully it will work well with 10.5 to 1. It seems that everyone here is doing it, so I feel better now about it.

[charlie66]

Originally Posted by Jay S

I see it has a Bulter part number and it is ground on B lobes. It is the same cam I mentioned, the off the shelf 433, except the 433 is advertised with S lobes. It is generally ground on B lobes though and advertised as an S in literature.


https://www.summitracing.com/parts/c...1/make/pontiac

Wow that is the same cam! interesting . Butler told me that it was there won custom design. I guess they made it there's by changing the 520 lift to a 521 . lol