Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Horsepower estimate for the Gen III Vortec V8
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Old 01-02-2013, 06:26 PM
Rmatt87 Rmatt87 is offline
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It is a Gen III LS1 engine i believe. It was in a 1997 Chevrolet Silverado 2500 4x4. The casting numbers for this block is 14093638. After i google the casting number on the back of the block it says its a 5.7L Vortec. The heads have a 64cc chamber. The valves are 1.94/1.50 but heads are machined to accept 2.02/1.60 valves. Not sure what that means. The 9.5:1 compression is their recommendation. I thought about bumping it to 12.5:1 CR. I already have the pistons if i do the higher compression. Again im not sure if i even want that high of compression. Thanks for your response.
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