L33 5.3l will 862 heads work?
08-10-2016, 03:28 PM
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L33 5.3l will 862 heads work? Hi everyone, I'm new to this site but am looking forward to all the valuable information I can get on ls motors! I am in the process of putting together a turbo motor. I have an older 5.3l ls motor out of a 99 Silverado that has 862 heads on it. I purchased an L33 short block that I want to use as a base that has the dimple rods with a good crank in it. I'm wondering if any one has input on using these 862 heads?! Thanks in advance for the input!
08-11-2016, 12:17 PM
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What good/ affordable heads could I run to lower compression and get good flow for this L33 motor? Rightnow I just have a set of 862 heads but if there's a good affordable set of heads out there I'm willing go that route because these heads I have need to be gone through anyways.
08-11-2016, 12:46 PM
#4
What good/ affordable heads could I run to lower compression and get good flow for this L33 motor? Rightnow I just have a set of 862 heads but if there's a good affordable set of heads out there I'm willing go that route because these heads I have need to be gone through anyways.
08-11-2016, 06:43 PM
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08-11-2016, 07:10 PM
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So are 799 and 243 heads the same? I don't have a whole bunch of knowledge about these heads. And info will be greatly approached! Thanks everyone so far on info/input i feel I'm on a good path to getting the hp I'm looking for with the right parts!
08-11-2016, 07:17 PM
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08-12-2016, 02:21 PM
#10
Problem is everyone wants the 799/243 heads. Going price is usually around $400-550.
The 862/706 are cheap with 61cc chambers. Usually found for $100-150 or less.
317's are a 6.0 head and the best cheap head available IMO. Usually found for $100-200 complete. They have the 71cc chambers and the larger intake valves and ports similar (but not quite as good) as the 243. They will drop your compression around a half point on a 5.3. (.6 I seem to remember). Much cheaper to do a home port job on a set of 317’s and have them milled to your desired CC size. I picked up my last set for $120. I believe a .040 is about the max suggested mill and nets about a 64cc chamber.
The 862/706 are cheap with 61cc chambers. Usually found for $100-150 or less.
317's are a 6.0 head and the best cheap head available IMO. Usually found for $100-200 complete. They have the 71cc chambers and the larger intake valves and ports similar (but not quite as good) as the 243. They will drop your compression around a half point on a 5.3. (.6 I seem to remember). Much cheaper to do a home port job on a set of 317’s and have them milled to your desired CC size. I picked up my last set for $120. I believe a .040 is about the max suggested mill and nets about a 64cc chamber.
08-12-2016, 09:01 PM
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Problem is everyone wants the 799/243 heads. Going price is usually around $400-550.
The 862/706 are cheap with 61cc chambers. Usually found for $100-150 or less.
317's are a 6.0 head and the best cheap head available IMO. Usually found for $100-200 complete. They have the 71cc chambers and the larger intake valves and ports similar (but not quite as good) as the 243. They will drop your compression around a half point on a 5.3. (.6 I seem to remember). Much cheaper to do a home port job on a set of 317’s and have them milled to your desired CC size. I picked up my last set for $120. I believe a .040 is about the max suggested mill and nets about a 64cc chamber.
The 862/706 are cheap with 61cc chambers. Usually found for $100-150 or less.
317's are a 6.0 head and the best cheap head available IMO. Usually found for $100-200 complete. They have the 71cc chambers and the larger intake valves and ports similar (but not quite as good) as the 243. They will drop your compression around a half point on a 5.3. (.6 I seem to remember). Much cheaper to do a home port job on a set of 317’s and have them milled to your desired CC size. I picked up my last set for $120. I believe a .040 is about the max suggested mill and nets about a 64cc chamber.
08-14-2016, 02:12 PM
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So I might be about to get my hands on 3 different sets of heads for cheap! I'm trying to find out which of these heads will work best for a boosted motor.. 241 , 317 ( which people already talked about) and 853? From my research the 241 heads are stock heads off an ls1 motor. And I'm unsure about the 853 heads.
08-14-2016, 06:46 PM
#13
So I might be about to get my hands on 3 different sets of heads for cheap! I'm trying to find out which of these heads will work best for a boosted motor.. 241 , 317 ( which people already talked about) and 853? From my research the 241 heads are stock heads off an ls1 motor. And I'm unsure about the 853 heads.
08-14-2016, 07:11 PM
#14
So I might be about to get my hands on 3 different sets of heads for cheap! I'm trying to find out which of these heads will work best for a boosted motor.. 241 , 317 ( which people already talked about) and 853? From my research the 241 heads are stock heads off an ls1 motor. And I'm unsure about the 853 heads.