larger valves and bowl size ?

when installing larger than stock valve what size in comparison should you open the bowl to? thanks

85% of the valve size
[addsig]

When you have the seats opened up have them use a tool to cut the bowls at the same time. Not sure if all machine shops have it but it sure makes it easy to blend the bowls in. These are cut at 70 degrees.




Had the intake bowls done in no time at all.



[addsig]

are those 70* cuts just to start?? we always cut 30 45 and 60...
later
Dan

That's right
[addsig]

I am concerned with the small amount of material that I have left for the seat itself, how much will the machine shop need for a good seat?

<font size=-1>[ This Message was edited by: Gent on 2/18/05 8:31am ]</font>

Son is getting his heads done right now.
To enlarge the valves from 1.94 to 2.02 and from 1.50 to 1.60 and cut the bowl, new valves and seats. Is going to be a touch over $300.00
But the big thing is to make sure they cut the bowl. If they don't you won't get the increase your looking for. Not all of it anyway.
Most machine shops around here don't mind talking your project over with you. They look things over and let you know if your ideas will work.

have any of you guys had your heads flowed before and after to get an idea if it was worth it or not?

save your money on the 2.02
[addsig]