Common question...head casting numbers and details
#24
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Originally Posted by 2000Firehawk
035 = die cast
317 = sand cast
Which is a better casting process ??
Dave
317 = sand cast
Which is a better casting process ??
Dave
#26
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head changes
There were two different cc volumes listed for the "806" casting heads;
69cc
66cc
Which of these is correct for these heads?
If it is indeed 69cc, could you mill the heads .025, and use the thinner gaskets to get aroound 10.5-1?
Thanks
69cc
66cc
Which of these is correct for these heads?
If it is indeed 69cc, could you mill the heads .025, and use the thinner gaskets to get aroound 10.5-1?
Thanks
#27
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Originally Posted by BOTTLE ROCKET
There were two different cc volumes listed for the "806" casting heads;
69cc
66cc
Which of these is correct for these heads?
If it is indeed 69cc, could you mill the heads .025, and use the thinner gaskets to get aroound 10.5-1?
Thanks
69cc
66cc
Which of these is correct for these heads?
If it is indeed 69cc, could you mill the heads .025, and use the thinner gaskets to get aroound 10.5-1?
Thanks
#29
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Originally Posted by FASTONE
why didn"t you start a new thread?
#32
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TTT, I was looking for some info for some 706 heads that I have.
Does anyone have an upgrade to this thread or atleast update all the info into the first post. THIS THREAD WILL MAKE A GOOD STICKY ALSO!
Does anyone have an upgrade to this thread or atleast update all the info into the first post. THIS THREAD WILL MAKE A GOOD STICKY ALSO!
#33
Question concerning performance diff?
I have a 2003 Chevy Suburban with the 706 casting heads on the LM7 5.3ltr and have recently come across some 2000 Corvette LS1 Heads casting 853. The owner is willing to give me the CAM, Lifters, Push Rods, and Full Head Assembly for $275.00. Number one question is, are these heads compatible with my engine without major modifications? Number two question is are they really any better than the 706 series casting other than the slightly larger intake valves?
Thanks,
Z
Thanks,
Z
Below is what I have. BTW, you stated that the 933 and 806 97-98 LS1 heads have a stock chamber volume of 69cc. I believe that is actually 66.67cc
__________________________________________________ __
Casting Number 806 or 933
LS1 (Perimeter Bolt)
97-98 5.7L Passenger Car and Corvette
Material: Aluminum
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 853 or 241
LS1 (Center Bolt)
99-00 5.7L Passenger Car and Corvette (853)
01+ 5.7L Passenger Car and Corvette (241)
Material: Aluminum
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 243
LS6
01+ 5.7L Corvette
Material: Aluminum
Combustion Chamber Volume: 64.45cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 706
LM4 / LM7
99+ 5.3L Truck
Material: Aluminum
Combustion Chamber Volume: 61.15cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 1.89 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 852
LR4
99+ 4.8L Truck
Material: Aluminum
Combustion Chamber Volume: 61.15cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 1.89 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 317 or 035
LQ9
01+ 6.0L Truck
Material: Aluminum
Combustion Chamber Volume: 71.06cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
__________________________________________________ __
Casting Number 806 or 933
LS1 (Perimeter Bolt)
97-98 5.7L Passenger Car and Corvette
Material: Aluminum
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 853 or 241
LS1 (Center Bolt)
99-00 5.7L Passenger Car and Corvette (853)
01+ 5.7L Passenger Car and Corvette (241)
Material: Aluminum
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 243
LS6
01+ 5.7L Corvette
Material: Aluminum
Combustion Chamber Volume: 64.45cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 706
LM4 / LM7
99+ 5.3L Truck
Material: Aluminum
Combustion Chamber Volume: 61.15cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 1.89 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 852
LR4
99+ 4.8L Truck
Material: Aluminum
Combustion Chamber Volume: 61.15cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 1.89 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 317 or 035
LQ9
01+ 6.0L Truck
Material: Aluminum
Combustion Chamber Volume: 71.06cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
#35
i have 853 and was going to upgrade to 243 heads but know i wondering since they are so close
Casting Number 853 or 241
LS1 (Center Bolt)
99-00 5.7L Passenger Car and Corvette (853)
01+ 5.7L Passenger Car and Corvette (241)
Material: Aluminum
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 243
LS6
01+ 5.7L Corvette
Material: Aluminum
Combustion Chamber Volume: 64.45cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
would it be worth having my heads ported, instead of get 243's
Casting Number 853 or 241
LS1 (Center Bolt)
99-00 5.7L Passenger Car and Corvette (853)
01+ 5.7L Passenger Car and Corvette (241)
Material: Aluminum
Combustion Chamber Volume: 66.67cc
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 243
LS6
01+ 5.7L Corvette
Material: Aluminum
Combustion Chamber Volume: 64.45cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
would it be worth having my heads ported, instead of get 243's
#40
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So if I want 5.3 heads for my LS1 to send off to AI for CNC work, I'd want the 706 castings?
How much would that raise m compression over the stock 241's with a stock size gasket?
EDIT: Also, which vehicles did 799 castings come on?
How much would that raise m compression over the stock 241's with a stock size gasket?
EDIT: Also, which vehicles did 799 castings come on?
Last edited by sepsis; 02-15-2012 at 12:22 AM.