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The only way possible for a miata valve to hit the piston is to have custom high lift cams. A stock cam even with os valves will not contact the piston EVER. Additionally, wiseco pistons have deeper reliefs than stock.
I know miata motors like I know the back of my hand.
The only way possible for a miata valve to hit the piston is to have custom high lift cams. A stock cam even with os valves will not contact the piston EVER. Additionally, wiseco pistons have deeper reliefs than stock.
I know miata motors like I know the back of my hand.
He does have high lift cams. W/ over sized valves and brass valve guides. Want to see the head?
The only way possible for a miata valve to hit the piston is to have custom high lift cams. A stock cam even with os valves will not contact the piston EVER. Additionally, wiseco pistons have deeper reliefs than stock.
I know miata motors like I know the back of my hand.
A loose timing belt/incorrect timing/loose adjustable cam gear will also cause valve to hit the piston....