5k cam

[chris76]

i'm thinking of getting a 285 or a 275 cam

i have c dish pistons 40 thou oversize , 3k head and compression ratio 10.5 1.

I haven't decided on what carby maybe twin 40 side drafts or a single i don't know if twins would be two big.

 

[kickn5k]

If you are constantly running 98 premium you could easily get away with 11:1 and a bit static comp. You'll need upgrade valve springs for either.

Twin 40's would be close to right. 38mm bike carbs work well with real similar combos.

[chris76]

20 hours ago, kickn5k said:

If you are constantly running 98 premium you could easily get away with 11:1 and a bit static comp. You'll need upgrade valve springs for either.

Twin 40's would be close to right. 38mm bike carbs work well with real similar combos.

What valve springs are the best to use in a 3k head?

[kickn5k]

On 2/2/2020 at 2:22 PM, chris76 said:

What valve springs are the best to use in a 3k head?

Any of the 3k to 5k upgrade springs fit all the k heads.

What are the best? Consult the cam grinder who is doing the camshaft, they will know what pressure you'll need.

Edited February 17, 2020 by kickn5k