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Location:
Adelaide
Registered:
May 2003
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Re: Valve sizing (4A upsize)
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Thu, 03 March 2005 12:11
 
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There isnt much room around to increase the seat size sadly, i have thought about that before. I will try on the dead head i have down here though, maybe ill port up all four cylinders differently to compare the differences.
I will eventually be running 11.2mm lift on 315* cams, but i didnt want to run those for the current engine revision. The cams that are in there are ones which were made up ages ago for another customer which they never picked up and so i bought them cheap. They are roughly the old TTA spec when they couldnt change to shim under bucket for certain classes.
As for the 4K there is so much more room on the valve/piston clearance than the 4A and i think even the stock cams run about 8 or 9mm lift.
And dont worry about the weight, ill be reducing the weight on a whole lot, i wish i could reduce the weight of the valve train a bit more, but sadly the most i can realistically do is the springs and solid alloy shims. Sucks to not have an unlimited budget 
Hopefully the pistons and rods will reduce weight in that department enough.
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| | Subject | Poster | Date |
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Valve sizing (4A upsize)
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takai | Thu, 03 March 2005 07:01 |
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Re: Valve sizing (4A upsize)
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oldcorollas | Thu, 03 March 2005 07:08 |
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Re: Valve sizing (4A upsize)
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Bill Sherwood | Thu, 03 March 2005 12:13 |
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Re: Valve sizing (4A upsize)
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oldcorollas | Thu, 03 March 2005 12:18 |
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Re: Valve sizing (4A upsize)
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takai | Thu, 03 March 2005 07:11 |
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Re: Valve sizing (4A upsize)
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IRA11Y | Thu, 03 March 2005 07:31 |
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Re: Valve sizing (4A upsize)
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takai | Thu, 03 March 2005 07:41 |
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Re: Valve sizing (4A upsize)
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fergo308 | Thu, 03 March 2005 11:21 |
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Re: Valve sizing (4A upsize)
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takai | Thu, 03 March 2005 11:54 |
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Re: Valve sizing (4A upsize)
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Meat_rack | Thu, 03 March 2005 12:01 |
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Re: Valve sizing (4A upsize)
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oldcorollas | Thu, 03 March 2005 12:05 |
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Re: Valve sizing (4A upsize)
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takai | Thu, 03 March 2005 12:11 |
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Re: Valve sizing (4A upsize)
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fergo308 | Thu, 03 March 2005 12:57 |
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Re: Valve sizing (4A upsize)
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takai | Thu, 03 March 2005 13:04 |
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Re: Valve sizing (4A upsize)
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oldcorollas | Thu, 03 March 2005 13:18 |
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Re: Valve sizing (4A upsize)
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takai | Thu, 03 March 2005 13:22 |
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Re: Valve sizing (4A upsize)
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Bill Sherwood | Thu, 03 March 2005 22:46 |
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Re: Valve sizing (4A upsize)
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shinybluesteel | Fri, 04 March 2005 07:18 |
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Re: Valve sizing (4A upsize)
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Anthony Kellam | Fri, 04 March 2005 09:17 |
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Re: Valve sizing (4A upsize)
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FKN16V | Fri, 04 March 2005 22:30 |
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Re: Valve sizing (4A upsize)
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ae86drift | Sat, 05 March 2005 04:37 |
