Largest valves on stock seats?
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From: Long Island, NY
Largest valves on stock seats? How far out can I take those stock seats in a 241 casting head? Can I have them cut enough to take 2.055 / 1.600 valves? Or am I limited to running 2.02 / 1.57 valves?
Whats the going rate (just a ballpark) for getting the seats cut and a valvejob?
Is it even worth the expense over imply running the stock valves in a hand ported head?
Thanks, -T
Whats the going rate (just a ballpark) for getting the seats cut and a valvejob?
Is it even worth the expense over imply running the stock valves in a hand ported head?
Thanks, -T
I was told that you can cut 2.02" into stock seats, but when my builder started playing with them he opted to re-seat them. He was concerned about heat transfer and longevity.
He explained to me how the valves act as heat sinks and every time they close they transfer heat to the head. On a race motor you can get more radical with the valve job and make almost a radius. This is better for flow, but will shorten the life. Acceptable in a race motor, but not desireable in a street motor.
I'm sure one of the sponsers can give you a better answer, but that's my 02cents.
He explained to me how the valves act as heat sinks and every time they close they transfer heat to the head. On a race motor you can get more radical with the valve job and make almost a radius. This is better for flow, but will shorten the life. Acceptable in a race motor, but not desireable in a street motor.
I'm sure one of the sponsers can give you a better answer, but that's my 02cents.
Thread Starter
TECH Senior Member
iTrader: (4)
Joined: Apr 2003
Posts: 6,249
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From: Long Island, NY
Originally Posted by ssheets
I was told that you can cut 2.02" into stock seats, but when my builder started playing with them he opted to re-seat them. He was concerned about heat transfer and longevity.
He explained to me how the valves act as heat sinks and every time they close they transfer heat to the head. On a race motor you can get more radical with the valve job and make almost a radius. This is better for flow, but will shorten the life. Acceptable in a race motor, but not desireable in a street motor.
I'm sure one of the sponsers can give you a better answer, but that's my 02cents.
He explained to me how the valves act as heat sinks and every time they close they transfer heat to the head. On a race motor you can get more radical with the valve job and make almost a radius. This is better for flow, but will shorten the life. Acceptable in a race motor, but not desireable in a street motor.
I'm sure one of the sponsers can give you a better answer, but that's my 02cents.
