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Location:
Eastern Sydney
Registered:
May 2002
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Re: Valve sizing (4A upsize)
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Thu, 03 March 2005 11:21
 
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do you really need to change them though,in all seriousness? the TRD AE92 100kw race spec engines were making ~195Hp with the std valves.
I've seen plenty of japanese built 4AG's making 200hp+ with std valves as well. they're plenty big enough. you're better off spending your cash on putting decent cams in and upping the compression.
from what I've been reading;to make power out of a 4AG,you need big cams (min. 288deg dur,10mm lift),big compression (over 11.5:1,pref. 12:1),big revs (9k),and quad throttles. that's the formula.
big port and 20v heads you don't need to touch bar dag removal,small ports you open up if you want to go over about 180hp.
Justin...
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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 |
