What engine has 799 heads?

Q: What engine has 799 heads? The aluminum 5.3-liter truck engine has 799 heads. The 799 cylinder head distinguishes the 5.3L from other engines due to the compression ratio. In addition, the 799 heads deliver increased power output on the 5.3-liter truck engine.

Are 799 good LS heads?

The 799 heads offered the most flow, bettering the 706 heads by as much as 20 cfm at some lift points. The chamber volume on the 799 heads was within 2.5 cc’s of the 706 heads, but the dyno indicated this did not translate into power on our test engine.

What LS has 799 heads?

In production these heads have been repurposed on the aluminum 5.3L truck engine (L33, “799” casting), which proves that despite being originally made for a 3.90-inch bore, these heads even fit on 4.8/5.3L blocks (3.78-inch bore), and are quite abundant used.

What CC are 799 heads?

See all 18 photos The 799 heads relied on 2.00/1.55-inch valve sizing and slightly larger 64cc combustion chambers.

Are 799 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 engine did 243 heads come on?

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 LS3 heads good for boost?

Just as they had on the naturally aspirated engine, the LS3 heads offered more power under boost, but the extra power also increased the backpressure. The boost pressure peaked at 7.6 psi, but dropped to 6.4 psi at 7,000 rpm.

Are 799 heads cathedral-Port?

Which LS engine has the most horsepower?

LS9The most powerful production engine ever from GM, the LS9 is the 6.2L supercharged and charge-cooled engine of the Corvette ZR1. It is rated at an astonishing 638 horsepower. The LS9 uses the strengthened 6.2L block with stronger, roto-cast cylinder heads and a sixth-generation 2.3L Roots-type supercharger.