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Old 01-20-2000, 08:35 AM
larry phillips larry phillips is offline
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Join Date: Jan 2000
Location: grass valley ca
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how well do these hold up to about 150 hp of nos in a 440 ? anyone ever have problems with them ? can you get them with valve reliefs ?
thanks big larry
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Old 01-20-2000, 09:11 AM
PRO PRO is offline
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Location: Grand Junction,CO.USA
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They hold up fine w/nos,kb says even w/200hp of nos,I run 150 all day long just be sure to have the piston to wall clearancs set to the nos spec recommended by kb for nos application,I dont have valve reliefs in mine theyre the 10.9:1 440 30 over pistons,how high of comp and how big of cam lift were you thinking? I have 10.5 w/felpro head gasket and 509 lift and have almost .200 valve to piston clearance.Remember to get the quench dome on the piston as close to the .035 clearance from the combustion chamber as possible ,this will create a better flame front and reduce total timing required and detonation.....PRO...
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