What heads came on the LS6?
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.
What size valves are in 241 heads?
See all 18 photos The smallest of the bunch, the 5.3L 706 (and 4.8L) heads featured a 1.89/1.55 valve combination and a 61.5cc chamber volume….241 Heads.
| 241 5.7L LS1 Castings | ||
|---|---|---|
| Valve Size: Intake – 2.00, Exhaust – 1.55 | ||
| 0.100 | 62.2 | 52.5 |
| 0.200 | 134.4 | 105.1 |
| 0.300 | 194.2 | 146.8 |
What did 241 heads come on?
LS1
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 243 heads?
Generation III cylinder head for V8 truck, van, SUV and perfomance applications often called an LS6 head. It has cathedral shaped intake ports and D shaped exhaust. The combustion chamber is slightly smaller and more efficient than the earlier heads used on LS1 engines.
How much HP can a LS6 handle?
A stock LS6 does have more power than a stock LS1. However, they can both make the same power with common upgrades. The aluminum blocks are not as strong as the iron block LQ4 and LQ9. But, they can be pushed to over 850 hp.
What’s the difference between 241 heads and 243 heads?
The 243 heads flow 10 cfm more on the intake side, and like 7 cfm more on the exhaust side (if memory serves me correctly). The combustion chamber is a difference of 3cc smaller on the 243’s. Valve sizes are identical in both sets of heads.
What is the best factory LS head?
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.
Which LS heads are the best?
How many miles is an LS6 good for?
These motors can easily go 200k w/ proper maintenance.
Can you put LS6 heads on LS1?
So, pay attention when purchasing replacement heads. Here’s the rundown summary: LS1 and LS6 blocks will accept only LS1, LS6 and LS2 heads. LS2 blocks can use LS1, LS6 or LS2 heads, as well as L92-style heads, which includes LS3 and LS9 heads.
Can you use LS1 valve springs on LS6?
The LS6’s sodium-filled valves are available through GM — part No. 17801930 — and are a direct retrofit for the LS1 heads, as are the LS6’s valve springs. But if you’re going for absolute power, particularly in naturally aspirated form, you’d do better to start with a set of LS6 heads and have them ported for max flow.
Is the PRC Stage 2.5 LS6 cylinder heads standard?
PRC’s stage 2.5 LS6 Cylinder Heads come standard with the following options: All PRC cylinder heads are extensively researched and tested. The flow data below shows the superior performance of the PRC stage 2.5 LS6 cylinder heads! Click Here to SEE why we build better heads!
How many CFM does a LS6 cylinder head have?
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.
Which is better LS1 head or LS6 head?
Judging by head flow alone, stock LS6 heads could potentially produce about 5 percent more power than stock LS1 heads, and maybe a bit more because of the smaller combustion chamber’s bump in compression.