Need help on TSP Stage 2.5 LS6 Heads for 5.3L Sierra
02-03-2014 | 03:36 PM
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Biggest difference (especially after being ported and getting oversized valves) is combustion chamber volume.
5.3 Heads are good for bumping compression and once ported, flow fairly well. A 2.5 5.3 will only flow about 8 cfm less than a 2.5 LS6.
For your application, I would recommend a stage 1 LS6 head with minimal milling to keep compression down. The smaller valves will are more suited to the small bore of the 5.3. Give me a call if you need any more assistance!
5.3 Heads are good for bumping compression and once ported, flow fairly well. A 2.5 5.3 will only flow about 8 cfm less than a 2.5 LS6.
For your application, I would recommend a stage 1 LS6 head with minimal milling to keep compression down. The smaller valves will are more suited to the small bore of the 5.3. Give me a call if you need any more assistance!
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