Difference between 241 and 243 castings?
#4
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Casting Number 243
Head: 2001 LS6 5.7 Litre Passenger Car
Material: Aluminimum
Part Number:
12564243
Combustion Chamber Volume: 64.45cc
Compression Ratio: 10.5:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 241
Head: 1997+ LS1 5.7 Litre Passenger Car
Material: Aluminimum
Part Number:
12559806 (1997-98) Chambers = 69cc
12559853 (1999-00)
12564241 (2001-03)
Combustion Chamber Volume: 66.67cc
Compression Ratio: 10.1:1
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Head: 2001 LS6 5.7 Litre Passenger Car
Material: Aluminimum
Part Number:
12564243
Combustion Chamber Volume: 64.45cc
Compression Ratio: 10.5:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 241
Head: 1997+ LS1 5.7 Litre Passenger Car
Material: Aluminimum
Part Number:
12559806 (1997-98) Chambers = 69cc
12559853 (1999-00)
12564241 (2001-03)
Combustion Chamber Volume: 66.67cc
Compression Ratio: 10.1:1
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
#5
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Originally Posted by Xtnct00WS6
Sounds right to me.
To add on to this a bit... The 243 makes a higher compression and flows better.
LS6 on the left and LS1 on the right:
To add on to this a bit... The 243 makes a higher compression and flows better.
LS6 on the left and LS1 on the right:
True.....
The 243 casting is also used on the LS2 motor. It is interchangeable with the LS1, LS6, LS2, 6.0, 5.3, and 4.8 motor's as all the heads just listed bolt on to eachother's bottomend.
The LS6 head is a 64cc head where as the LS1 (241 casting as well as 806, and 853 casting) is a 67.67cc's. The difference is compression.
The 64 cc head will give about 1/2 a point more compression on a stcok LS1/LS6 motor.
There is a ton of reading on this subject. Check out JRP's common asked questions and read until your eyes fall out.
#6
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Originally Posted by 777
Casting Number 243
Head: 2001 LS6 5.7 Litre Passenger Car
Material: Aluminimum
Part Number:
12564243
Combustion Chamber Volume: 64.45cc
Compression Ratio: 10.5:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 241
Head: 1997+ LS1 5.7 Litre Passenger Car
Material: Aluminimum
Part Number:
12559806 (1997-98) Chambers = 69cc
12559853 (1999-00)
12564241 (2001-03)
Combustion Chamber Volume: 66.67cc
Compression Ratio: 10.1:1
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Head: 2001 LS6 5.7 Litre Passenger Car
Material: Aluminimum
Part Number:
12564243
Combustion Chamber Volume: 64.45cc
Compression Ratio: 10.5:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Casting Number 241
Head: 1997+ LS1 5.7 Litre Passenger Car
Material: Aluminimum
Part Number:
12559806 (1997-98) Chambers = 69cc
12559853 (1999-00)
12564241 (2001-03)
Combustion Chamber Volume: 66.67cc
Compression Ratio: 10.1:1
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
I wondered about the Intake Port volume especially...
#7
The 97-98 806 castings will be the perimeter while all other 99-up heads will be center bolt. If you are going to be looking at ported heads, make sure to ask about the runner volume after porting. It can vary greatly. We have seen ported LS1 heads with runner volumes larger than our LS6 style heads.
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#8
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Originally Posted by Gunnar@Patriot
The 97-98 806 castings will be the perimeter while all other 99-up heads will be center bolt. If you are going to be looking at ported heads, make sure to ask about the runner volume after porting. It can vary greatly. We have seen ported LS1 heads with runner volumes larger than our LS6 style heads.
#10
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Originally Posted by Gunnar@Patriot
Make sure to take a look at our 243 catings that we have right now.
#11
Originally Posted by FUN LS1
Yeah, I read a bunch of posts about them, and it sounds like a sweet deal with those valves. I couldn't find the page for them on your web site, though. Just the LS6 Style and 5.3/LS1 pages...