What engine came with 243 heads?
What engine came with 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 is special about 243 heads?
243 cylinder heads have cathedral-shaped intake ports and a D-shaped exhaust, which helps to enhance air and fuel intake, smooth combustion, and quicker exhausting. This process triggers improved horsepower for high performance and efficiency.
Are 243 heads the best?
Also known as 799 heads, 243 heads are the best performing aluminum cylinder heads that were standard on 3rd generation GM LS6 & LS2 engines that were produced starting in 2004 & 2005, though they are most well-known for being the cylinder heads for the C5 Corvettes.
Does LS2 have 243 heads?
GM LS2 LS6 Gen III Gen IV SET OF 2 Remanufactured Cylinder Heads 243 Assembly w/Rocker Arms OEM NO CORE CHARGE NECESSARY.
How much HP does 243 heads add?
A stock pair of 243 heads can gain about 20 hp on a bolt-on LS1. Since you already have a cam, you might see a bit more. If your budget does not allow a full porting job, don’t sweat it, just swapping to 243 alone will be a big help.
Did the 5.3 come with 243 heads?
The 4.8 and 5.3 come with 799(243) heads from the factory nowadays. You can mill the heads to maintain the compression, but the heads will bolt on.
What do stock 243 heads flow?
GM 243 (LS6) and 799 (LS2), 218 cc The 218-cc LS6/LS2 head is a mild upgrade from the basic performance rebuild, which boosts flow by 32.2 cfm on the intake side and 28.5 cfm on the exhaust side, at . 600-inch lift, despite the more cost-conscious machine work.
What did 799 heads come on?
799 heads came on trucks manufactured around 2005 and above, as well as newer models of 5.3 and 4.8-liter trucks, come with 799 heads. However, Chevy unveiled the L20 4.8-liter engine, which had the 799 cylinder head in 2010.
How much do 243 heads flow?
The 243 heads as used on the LS2 motor flow at 260 CFM on the intake. LS6 243s (CNCed) with sodium filled valves flow a little better at 280 on the intake. The stock 241 head flows at 220 on the intake.
What are 241 heads?
The 241 heads were used on 5.7L LS1 applications and are considered by many to be just a minor step up in performance from the 706. In terms of peak flow, the 241 heads offered 242 cfm at 0.700-inch lift from the 199cc intake ports, and 204 cfm from the 71cc exhaust ports.
What are the best flowing LS heads?
The LS6 was designed specifically by GM to surpass the LS1 as the best performance head, and it did such a good job that the “243” casting was recycled on the LS2. Aside from the LQ9, which is a copy of the LS6, these are the best performing of the OEM cathedral ports.