Can you help me with the valve clearence by Ferrea valve. I have on turbocharger engine complete kit Ferrea with dual springs, but the engine sounds really crazy.

We used factory valve clearence:
21-25 intake
25-29 exhaust

We dont know, how set up optimal the valve clearence.

Many thanks for help

I appreciate that.

 

those are way off

 

Can you please cite the source of your factory valve clearance for us?

This is proper valve clearance:

Intake .008" to .010"
Exhaust .010" to .011"

That is factory clearance for the S2000, and what I run on my Laskey built head. If you have oversized valves I do not know what the proper clearance would be, or if that would even affect that.