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.
Do ported heads increase horsepower?
How much HP does a port and polish give you? Head porting is probably the single most critical piece of adding HP. you can gain 20-30 from a really good port job.
What LS motor has 243 heads?
LS6 engine
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.
Are 243 heads cathedral Port?
Essentially a 243 head with different casting numbers, the 799/243 heads are considered to be the top of the line, factory, cathedral-port offerings. Tested on a flow bench, the 799 head offered right at 249 cfm at . 700 lift on the intake and 191 cfm on the exhaust.
What cars came with 243 heads?
The 243 head came on the more powerful LS6 engine from 2001 to 2006, and was used in C5 Corvettes. Later engines like the truck-spec LQ9 and LQ4 used the exact same port design as the LS6’s 243 heads, but had 6 cc larger combustion chambers.
How much HP does a ported intake add?
Serious head porting can get you some horsepower but usually you have to be running a high lift cam ( over . 500 lift) to see any benefits. You are probably in the right neighborhood, with 2-5 HP. :D.
Are ported heads worth it?
It’s not worth it. You won’t feel the gains in the seat of your pants with a free-flowing air filter, a “tornado” air intake or a fuel system additive. At best, you’re improving your fuel efficiency. At worst, you’re wasting your hard-earned cash.
Did LS2 come with 243 heads?
The 243 head is the 01+ LS6/LS2 head. It has a smaller 64.45cc chamber for more compression (10.5 CR on LS6), 210cc intake runners, and 75cc D-shaped exhaust ports. All three came with 2.00″ intake valves, and 1.55″ exhaust valves.
Did the 5.3 come with 243 heads?
Of course, the 5.3, as well as the 4.8, come with factory-designed 243 heads nowadays. The LS6 engine designed between 2001 and 2006 came with 243 heads.
What vehicles came with 243 heads?
What kind of heads does a GMC 243 have?
GM 243 heads are General Motor’s 3rd generation cylinder heads designed for V8 trucks, SUVs, vans, and performance applications. The 243 heads are often called LS6 heads because they were found on the 2001 – 2006 LS6 engines. The 243 heads have a D-shaped exhaust and cathedral-shaped intake ports.
Are 243 heads good for porting?
If you desire to perform a porting on your vehicle’s cylinder head, getting new 243 heads is perfect for the porting job. When the 243 heads are coupled with a powerful can and an excellent valve lift, the result is improved power output. If you’re looking for 243 heads for sale, kindly check a dealership near you or buy online.
Why LME CNC ported LS1 243 heads?
With outstanding flow numbers and an efficient port shape, the LME CNC ported LS1 243s bring value and performance together. There are multiple methods of obtaining a set of LME CNC ported heads perfectly sculpted for your hot rod:
What is the difference between a 706 and 243 cylinder heads?
The 243 heads come with 64.5cc chambers, while the 706 heads feature 61.5 cc chambers. Although the 243 heads appear to be more excellent than the 706 heads, it may not be a nice combo with a tiny bore engine due to its larger intake valve.