Racing camshafts

[digger]

If you are going to use OEM and haven't purchased them yet, id contact MM as they do offer inspected and shot peened rockers IIRC and have worked out which ones are the good quality manufacturers

[hasa]

The OE rockers will physically work unless the cam is stated as not being compatible.I was referring to the HD rockers may not as the pad is different on some earlier versions. they may have addressed this but pad quality seems questionable.

One issue is good quality springs without them going soft. PAC sell a beehive spring and retainer iirc that’s compatible, it’s from a ford 2v modular engine.

With stuffer sorings then you rockers that can withstand the higher loads and surface speeds that are required.

you can run what the cam companies recommend but it’s worth looking at alternatives

What spring rate these springs have?

I measured my current dbilas springs and they have slightly over 5kg/mm. 50kg closed, 115kg open pressure are realistic with them.

[digger]

[hasa]

PAC-1223 is 6,1kg/mm. Looks good. What retainers should be used with them?

[digger]

PAC-1223 is 6,1kg/mm. Looks good. What retainers should be used with them?

according to PAC it is PAC-R312