Does the LS1 have cathedral port heads?
All LS1, LS6 and LS2 heads feature tallcathedral-style intake ports. The LS7, L92 and LS3 heads feature rectangular intake ports. GM cathedral-style intake ports measure in the range of 3.125 inches high by 1 inch wide. These are easy to identify due to their tall, narrow shape and somewhat radiused top profile.
Are cathedral heads better?
In fact, they had the ideal set of heads for our comparison. Traditionally, cathedral-port heads offer smaller chambers than their rectangular-port cousins. The change in compression ratio can be as much as a full point or more, which can improve power by as much as 3-4 percent (near 25 hp on a 600hp motor).
What heads came on LS1?
You can identify which head you have by looking at the three-digit stamping next to the valve cover; for example, the LS1 used head castings 339 and 806 through 1998, and 853 and 241 from 1999 through 2004. The 243 head came on the more powerful LS6 engine from 2001 to 2006, and was used in C5 Corvettes.
What LS engine has 243 heads?
The 243 heads came on the LS6 engine produced from 2001 to 2006. It was typically found in the C5 Corvette, but it was eventually ported to the LQ4 and LQ9 to meet truck specs.
What did 243 LS heads come on?
What size cylinder heads are on the lsxceleration XF1 Cathedral Port?
LSXceleration XF1 Cathedral Port 255cc/64cc 11° CNC Cylinder Heads – Bare 15-161000-2 6-bolt Cathedral Port CNC Cylinder Head Pair w/ Billet Rocker Stands. Features: 6 bolt casting (4 bolt available) Minimum Bore Size 3.780″ 11°…
What are Cathedral port cylinder heads?
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 design with excellent flow. For a street car, this design means excellent throttle response, torque and average power.
How much horsepower does a cathedral port engine have?
For road racing, a cathedral port is ideal, and has even proven to be quite capable in drag racing with an altered valve angle and larger runner sizes. The OEM design that started it all, the original Gen III cylinder head, helped produce 350 hp using 5.7 liters of displacement.
What kind of heads does RHS make for an LS1?
RHS Pro Action 210/65cc LS1 Bare Cylinder Head 54240 RHS has introduced their new Pro Action™ Cathedral Port Aluminum Cylinder Heads as a premium LS1 replacement head, ensuring great power on any performance or stock engine build. Available bare…