How do I calculate how much to degree cams

[AlphaVision]

I want to test the cams performance when degreed. I need to lower my powerband because the car is too laggy now. The question is - how can I make sure a valve doesn't hit a piston.

I have Delta K272 (same as Kelford 272) pair, Manley 8.5:1 pistons, Cometic MLS 1.6mm gasket, head and block surfaced.

 

[NOSLO2PT0]

You can't adjust the cams too far so that the valves make contact with the pistons. It takes at LEAST 3 teeth off in order to start thinking about contact to happen. Each tooth = 6*, so you would have to adjust your cam gears a MINIMUM of 18* one way or another in order to make contact. Don't worry about it.

 

[AlphaVision]

Does this apply to stock cams?

K272s have a very aggressive ramp rate and a max lift of 11mm so I thought that advancing with 12 degrees may be risky

 

[knochgoon24]

4G63 Camshaft Degreeing
From there, you should have some room either way. The best bet would be to clay the clearance, but you should have a few degrees to play with.

Why did you go with such an aggressive cam if you're worried about the lag?

The HTA68 should be a quick spooling turbo.

 

[AlphaVision]

I got those along with the adjustable cams so I can still have aggressive cams and lower the power band thus lag, which I guess was wrong.

I will try degreeing them and see what happens. If I can't reduce lag significantly will put back the stock cams.