799 heads on LM7 with big cam , how much to mill ?
#1
TECH Apprentice
Thread Starter
799 heads on LM7 with big cam , how much to mill ?
hi
i have 799 heads bought it before a month ,
my engine is LM7 2004 iron block , i plan on take the 862 out and put 799(243)
instead , my cam no# 231\239 617\621 113LSA . i put with it a set of PRC dual spring 660 kit and chromo pushrod 7.4 , LS7 lifters milling oil pump C5r timing chain ,
i know i have to mill at least 0.30 to restore stock Cr , i want to rise my cr to 9.9.1 or close to it ,
i am afraid i will face PTV issue or overheating with extra milling (0.40)
what do you suggest i do to get to my goal ? and which gasket to use ?
thanks a lot
i have 799 heads bought it before a month ,
my engine is LM7 2004 iron block , i plan on take the 862 out and put 799(243)
instead , my cam no# 231\239 617\621 113LSA . i put with it a set of PRC dual spring 660 kit and chromo pushrod 7.4 , LS7 lifters milling oil pump C5r timing chain ,
i know i have to mill at least 0.30 to restore stock Cr , i want to rise my cr to 9.9.1 or close to it ,
i am afraid i will face PTV issue or overheating with extra milling (0.40)
what do you suggest i do to get to my goal ? and which gasket to use ?
thanks a lot
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#8
TECH Apprentice
Thread Starter
those heads will be put on hold for some time ,
yesterday we completed cam tuning after i left for home something happened with check engine light blinking all the time exept when braking or stopping ,
i checked pcm for faults and nothing came up , oil pressur is perfect
there is a sound similar to broken piston and it only appear on low rpm ,
if anyone have or faced similar problem please do tell
yesterday we completed cam tuning after i left for home something happened with check engine light blinking all the time exept when braking or stopping ,
i checked pcm for faults and nothing came up , oil pressur is perfect
there is a sound similar to broken piston and it only appear on low rpm ,
if anyone have or faced similar problem please do tell
#9
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Join Date: Jun 2009
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those heads will be put on hold for some time ,
yesterday we completed cam tuning after i left for home something happened with check engine light blinking all the time exept when braking or stopping ,
i checked pcm for faults and nothing came up , oil pressur is perfect
there is a sound similar to broken piston and it only appear on low rpm ,
if anyone have or faced similar problem please do tell
yesterday we completed cam tuning after i left for home something happened with check engine light blinking all the time exept when braking or stopping ,
i checked pcm for faults and nothing came up , oil pressur is perfect
there is a sound similar to broken piston and it only appear on low rpm ,
if anyone have or faced similar problem please do tell
#10
TECH Apprentice
Thread Starter
Flashing CEL is random misfire detected. May want to check plugs, wires, coil pack connectors. I also got the dreadful flashing CEL when I had a bad injector connector that was coming loose