243 or 317s?
09-06-2010, 06:35 PM
#22
Your thread will be deleted if you keep bumping it like that, I wouldn't do that.
Sure is, will lower compression. Found detailed specs in gen 3 section.
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 317
Head: 2001+ LQ4 6.0 Litre Truck
Material: Aluminimum
Part Number:
12572035
Combustion Chamber Volume: 71.06cc
Compression Ratio: 10:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
09-06-2010, 06:40 PM
#25
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so 243's are better if im not planning on putting any FI in my car... its not happening soon but it will b happening before to long. like a year or so. So i might just go with the 317's because the guy is going to give me a good deal and he is selling me yellla terra's 1.7's for a good price also. Unless you think its a bad idea?
09-06-2010, 06:41 PM
#26
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ya im done doing the bumps... ill make it to 50 by doing it right lol... and the thread i read about it said get to 50... and then 24 hours later you can post on the classifieds. But as you can tell im new lol
09-10-2010, 10:36 AM
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In the event that Chavez885's post was to heavy on info ill help a lil. The 317 heads came off the 6.0 trucks. They have 72cc combustion chambers. That is the largest option you can get for a LS style engine. That larger combustion chamber lowers the compression of the engine a little making it better for boost and pump gas. They have the same exact layout otherwise as a LS6 head which is the 243. Same valves ports everything. Makin the 317 the best stock option for FI.
GL man!
GL man!
09-10-2010, 10:44 AM
#28
