LS2-LS3 compression ratio
11-10-2010, 07:27 AM
#1
LS2-LS3 compression ratio How differs the compresion ratio in a LS2 with 243 heads from a LS3 with 821 heads? What about using a LS2 with LS3 (821) heads? Do this last combination with probably less compression is better than the others factory ones?
11-12-2010, 03:21 PM
#3
11-20-2010, 08:57 PM
#5
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The ls2 stock with 243 heads is 10:9:1. The ls3 with stock 821 heads is 10:7:1. A ls2 with ls3 heads will drop down to 10:4:1 due to the 70cc chambers in the ls3 heads. If you mill them you can retain stock ls2 compression but it will kill you ptv clearance.
