Webthis is a video of how I ported my 317 casting number heads that I am putting on my 4.8 liter twin turbo setup in my 1983 ltd sleeper wagon build they have a... WebJul 26, 2016 · The 317 heads featured ports that all but duplicated the LS2 243 heads, meaning they were cream of the cathedral-port crop in terms of airflow. The 317s did differ from the 243s in that they featured much larger (and less efficient) combustion chambers. Where the stock 243 heads featured 65cc chambers, the 317 heads featured 72 cc …
A Guide to LS Cylinder Heads - Engine Builder Magazine
WebJan 21, 2024 · RPO L99 and LS3 cylinder heads are aluminum with 68cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, … WebFind many great new & used options and get the best deals for 2005 GM Part 317 Cylinder Heads 6.0 LS fits Chevy Camaro Gmc Truck SS 5.3 oem at the best online prices at eBay! … cta interactive map
Surprising HP Numbers From Our Stock LS Cylinder …
WebUnderstanding GM LS-Series Cylinder Heads. Before I get into the the meat of the book—the spec charts—there are a few things you need to know. They include information on converting from a cathedral port to a rectangular port, some thoughts on the merits of cathedral versus rectangular ports, and a bit of cylinder head theory. WebSep 24, 2015 · These heads came on low-performance 6.0-liter truck engines in two variations: “873” cast iron (1999–2000) and “317” aluminum (2001+). The early design was the only castiron LS head ever made, and the least desirable in a performance application. However, the later heads can be a good choice for boosted applications because they … WebNov 4, 2011 · 243 on a 6.0 youre looking at close to the same compression as an ls2 since ls2's are 6.0 with 243 heads, some are 799 but the same. 317 and 243's flow the same. stock 6.0 with 243's youre going from 310 or what ever the stock numbers are plus 30 maybe 40. just guessing here. add a nice cam for good torque to compliment the truck intake ... ear ppt