Back Cutting Exhaust Valves at Lindsay Heath blog

Back Cutting Exhaust Valves. Short overview of areas to add back cuts to the valves to enhance low lift flow. Cut it back until it comes within 0.030 of the witness mark with. Usually steel valves like a 12* back angle have more reverse flow than a ti valve with a 25* back angle and back cutting the 12*. Corresponding exhaust valve has a thicker margin to resist higher temperatures and a generous radius on the bottom to encourage exit flow around the valve. I back cut all my exhaust valves but made sure they had almost a sharp edge on the face to prevent back flow My opinion of modding intake & exhaust valves for performance and how i do it. Easy upgrades if you know they exist! Intake valve (left) has a 30° back cut above the seat and a thin margin with a sharp edge on the bottom to discourage inlet tract reversion. Start with a 22 deg back cut if you don't have access to a bench.

HOW TO BUDGET back cut stock valves at home ! YouTube
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Intake valve (left) has a 30° back cut above the seat and a thin margin with a sharp edge on the bottom to discourage inlet tract reversion. My opinion of modding intake & exhaust valves for performance and how i do it. Usually steel valves like a 12* back angle have more reverse flow than a ti valve with a 25* back angle and back cutting the 12*. Easy upgrades if you know they exist! Short overview of areas to add back cuts to the valves to enhance low lift flow. Start with a 22 deg back cut if you don't have access to a bench. Corresponding exhaust valve has a thicker margin to resist higher temperatures and a generous radius on the bottom to encourage exit flow around the valve. Cut it back until it comes within 0.030 of the witness mark with. I back cut all my exhaust valves but made sure they had almost a sharp edge on the face to prevent back flow

HOW TO BUDGET back cut stock valves at home ! YouTube

Back Cutting Exhaust Valves Cut it back until it comes within 0.030 of the witness mark with. Corresponding exhaust valve has a thicker margin to resist higher temperatures and a generous radius on the bottom to encourage exit flow around the valve. Easy upgrades if you know they exist! Short overview of areas to add back cuts to the valves to enhance low lift flow. Cut it back until it comes within 0.030 of the witness mark with. Intake valve (left) has a 30° back cut above the seat and a thin margin with a sharp edge on the bottom to discourage inlet tract reversion. Usually steel valves like a 12* back angle have more reverse flow than a ti valve with a 25* back angle and back cutting the 12*. I back cut all my exhaust valves but made sure they had almost a sharp edge on the face to prevent back flow Start with a 22 deg back cut if you don't have access to a bench. My opinion of modding intake & exhaust valves for performance and how i do it.

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