Maximum Valve size?
07-14-2006, 07:14 PM
#1
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Maximum Valve size? What is the maximum Valve size you can go to on a 317 casting without changing the seats? Will a 2.02/1.60 combo work without changing the seats?
07-18-2006, 06:30 AM
#4
We only go to a 2.020" and a 1.570" on stock seats. Going bigger on the intake there is not alot of material past the 45. I have seen in some cases, small pieces of the seat flaking off when using a valve almost the same size as the seat.
07-18-2006, 10:15 AM
#5
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Ok,
FYI TSP (PRC) stage 2.5's have 2.04 and 1.57 valves.
I see now what you are saying. 2.04 fits but not optimized. So a 2.02 would have the same results in that case.
FYI TSP (PRC) stage 2.5's have 2.04 and 1.57 valves.
I see now what you are saying. 2.04 fits but not optimized. So a 2.02 would have the same results in that case.
Last edited by PREDATOR-Z; 07-18-2006 at 01:16 PM.
07-18-2006, 01:09 PM
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I know the heads you are refering to. It is my opinion that they are on of the best heads out there for the money. They are just valve jobbed a little small for a 2.04.
07-19-2006, 08:21 PM
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So for a 239/242 @.050 cam would I be better off with a 2.00/1.60 combination or a 2.02 and/1.57 ?
This is on a iron , 408 , 317 heads mildly ported.
This is on a iron , 408 , 317 heads mildly ported.
