Hello guys, I have a 1979 K-Jet 398 casting BCP head i've been thinking about getting work done on for a couple months now. The gist is that I want to modify this head to be more fun on the street than my bone stock B230F with B cam. After some reasearch here, I think some reasonable budget work for this head would be 46/38mm valves on cut stock seats, skimmed for more compression, along with a K cam and B21F intake I already have. I also want to stick with my current lh24/ez116k with a raised rev limit.
I have a couple of questions for those more experienced than I:
1.) Do the big coolant passages limit how much I can skim the head? What is a reasonable height to remove and static compression ratio to go for running premium gas?
2.) What is a reasonable valve spring setup for this cam (and an upgrade down the line) and an RPM my bottom end can handle? I currently have the "large" 32mm OD valve spring setup. I think I need new retainers for aftermarket springs?
3.) How practical are physically stock sized injectors in the K-jet head holes? I see its been done here before and I personally mocked up a fuel rail there with seemingly no problems. Though the ID of the injector holes at the bottom seems a bit too narrow.
I put together a cart on kl-racing with the above in mind, please critique it:
4x 46mm stainless intake valve
4x 38mm stainless exhause valve
4x valve stem seals
8x lower spring retainer
8x upper spring retainer
8x valve spring 39kg
Thanks for any input.
I have a couple of questions for those more experienced than I:
1.) Do the big coolant passages limit how much I can skim the head? What is a reasonable height to remove and static compression ratio to go for running premium gas?
2.) What is a reasonable valve spring setup for this cam (and an upgrade down the line) and an RPM my bottom end can handle? I currently have the "large" 32mm OD valve spring setup. I think I need new retainers for aftermarket springs?
3.) How practical are physically stock sized injectors in the K-jet head holes? I see its been done here before and I personally mocked up a fuel rail there with seemingly no problems. Though the ID of the injector holes at the bottom seems a bit too narrow.
I put together a cart on kl-racing with the above in mind, please critique it:
4x 46mm stainless intake valve
4x 38mm stainless exhause valve
4x valve stem seals
8x lower spring retainer
8x upper spring retainer
8x valve spring 39kg
Thanks for any input.
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