WRECKSHOP
Expert Class
Posts: 359
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posted October 14, 2009 02:29 PM
Valve Seat Contour & Profile ?
Which is the best angle, shape, contour or radius ? Which one is the most used and which one makes the most power ??? Cylinder head GURU'S chime in please.....
  
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osti33
Needs a job
Posts: 2973
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posted October 14, 2009 03:21 PM
quote:
Which is the best angle, shape, contour or radius ? Which one is the most used and which one makes the most power ??? Cylinder head GURU'S chime in please.....
Good luck!
Shop's spend thousands of dollars devloping cutters. I don't think many are going to just give that information away.
But I could be wrong.
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KZScott
Needs a life
high on speed
Posts: 7235
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posted October 14, 2009 07:05 PM
just get Jim to do it, worked for me 
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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tcchin
Zone Head
Posts: 867
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posted October 14, 2009 09:39 PM
+1
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted October 15, 2009 06:09 PM
 Edited By: Y2KZX12R on 16 Oct 2009 02:26
quote:
Which is the best angle, shape, contour or radius ? Which one is the most used and which one makes the most power ??? Cylinder head GURU'S chime in please.....
I have designed many cutter inserts for all sorts of engines.
This is one that I designed and works well for the stage 1 Busa... sorry I've removed the data  but you get the general shape. I can tell you that .005" in seat widths and a change in radius of only 10% can make the difference between good and junk.
Basically its a balancing act between homogenization of the fuel and air flow. Angles help homogenize the fuel by causing flow separation and turbulence. A radius valve job flows more air on the flow bench. (usually) So If you can flow a lot of air yet induce a separation for better homogenization, the BSFC goes down and power goes up.
And that all I'm gonna say on that.
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Y2KZX12R
CompetitionCNC.com
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whitehendrix
Zone Head
fails!
Posts: 757
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posted October 15, 2009 06:15 PM
that explains it all!!!
____________
Duct tape is the handyman's secret
weapon. The black is for formal
occasions. - ZRXDean
ill never own a busa unless
someone gives me one.... and then
ill sell it -KZScott
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WRECKSHOP
Expert Class
Posts: 359
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posted October 16, 2009 06:23 AM
Yes it does and thanks Mr. Y2KZX12R.....Thats basically all i was asking for, not anyone's particular secret or cutter profile data....
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