WebJan 21, 2024 · The cylinder heads are aluminum with 65cc combustion chambers, cathedral intake ports with 210cc runners, D-port exhaust with 75cc runners, 2.000˝ intake valves and 1.575˝ exhaust valves. When … WebSep 24, 2015 · Cathedral port cylinder heads have been mistakenly dismissed by many in LS-series circles for being “old-tech.” However, their thin cross-section allows for a high-velocity and smaller-volume runner …

Tech: GM 1st Gen Heads vs. Vortec Heads Reader Guide - Chevy Hardco…

WebJul 12, 2012 · As you'll see, the Vortec heads combination was worth barely 378 hp, and the top five small block Chevy heads we tested would easily push the Chevelle into the mid … WebNov 24, 2010 · GM Iron Peanut Port This cast-iron head is called the peanut port because the intake ports are not much larger than their namesake. These peanut ports are roughly 30 percent smaller than an aftermarket 270cc version. There are larger factory oval-port, cast-iron, open-chamber heads at 250 cc. how many organ system do we have

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WebSep 2, 2024 · LT1/LT4 Cylinder Head Types. GM produced a number of LT1 cylinder heads during the 1990s. Here’s how they stack up. Be careful when shopping for these heads—there were eight different aluminum cylinder head castings produced for the LT1/LT4. LT1/LT4 heads employ rail-style self-aligning rocker arms similar to the LS. WebSep 25, 2008 · The "041" head was a 1969-1970 high performance head, with the same exact performance characteristics as both the "186" and "187" Camel (double) Hump heads. It also is a 64 cc combustion chamber. It was available from the factor with both 1.94/1.5 and 2.02/1.6 valves, just depended upon which vehicle GM put them in. WebOct 28, 2024 · The RS-X heads utilize massive 449cc intake runners to support 481 cfm of airflow at .787-in. lift. Many of the valve train components in the heads have also been … how many organs systems are in the human body