Are All LS Heads Aluminum?

Can you put LS heads on a Vortec engine?

The “Vortec 350” is the good-old, 1955 based Small Block Chevy, with some of the best factory SBC heads.

Parts are NOT interchangeable in any way with the new-for-1997 LS series of engines…

LS1, LS2, LS3, LS7, LSA, etc..

Do 862 heads crack?

The initial signs of cracked Castech heads are: Mileage of 100,000 to 200,000, but sometimes as low as 60,000. … The head casting numbers are typically 706 or 862.

How much HP can a 5.3 LS make?

The stock 5.3L is factory rated around 320 hp with 340 lb-ft of torque.

Which is better ls2 or ls3?

But, the most obvious difference between the two is the displacement. The LS2 has 6.0L of displacement, and is technically was the first Gen IV Chevrolet engine. The LS3, on the other hand, has 6.2L of displacement and is also Gen IV Chevrolet engine. … To no one’s surprise, the LS3 heads are better than the LS2 heads.

Which LS engine is strongest?

Best LS EnginesLS9/LSA: Made for the 2009-2013 Corvette ZR1, the LS9 is a supercharged 6.2L engine rated at 638 horsepower — the most powerful of all small blocks. … LS1: This is the one that started it all! … LS7: Introduced in 2005, the LS7 sported 427 cubic inches, making it the largest small block ever.More items…•

Is the 5.3 a good motor?

5.3L V8 Vortec 5300 Reliability The Vortec 5.3 is widely regarded as extremely reliable, with most engines having a lifespan within the 200k-300k mileage range.

Are all LS heads interchangeable?

All LS cylinder heads, with the exception of the LS7 heads, are interchangeable among blocks. The LS7 cylinder heads cannot be mounted to other LS blocks, as the wider valve layout would result in valves contacting the bores.

Are 706 heads aluminum?

The reason is that the 706 heads are SPM (semi-permanent mold) made, while the 862 heads are sand cast. The SPM method is considered to be a more consistent process, but once you port the 862 head, any difference to the 706 head goes away.

Are 5.3 LS Motors?

The GM 5.3L engine (326.1 ci, 3.78-inch bore 3.62-inch stroke) is by far the most-produced displacement in GM’s Gen III, IV, and V family tree. There are millions of these lying around in the salvage-yard—and like all “LS”-based engines, they can produce big power even in well-used, 100,000-mile trim.

Which LS blocks are aluminum?

With the noted exception of the early LQ4 engine, all LS engines have aluminum cylinder heads. The LS2 and L76 are noteworthy in that they are both Gen IV 6.0L aluminum block engines, and that they came from the factory in both cars and trucks.

Which LS heads are the best?

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.

Is Vortec the same as LS?

Although Vortec engines are “LS” based they are NOT LS engines IMO. … You can gain an inch or two by removing the plastic engine cover and cutting some of the plastic tabs on top of the Vortec intake manifold. This may be all you need for clearance and a Vortec will fit in your car.

Which LS engine is aluminum?

The Generation III 5.7L (LS1 and LS6) engines share little other than similar displacement, external dimensions, and rod bearings, with its predecessor (LT1). It is an all-aluminum 5,665 cc (5.7 L; 345.7 cu in) pushrod engine with a bore and a stroke of 99 mm × 92 mm (3.898 in × 3.622 in).

Are all LS engines aluminum?

All LS engines are pushrod V8s with aluminum cylinder heads. … Though some have a big-block displacement, like the LSX 454 crate engine (Exception being the 8.1 Vortec which is a big block). There are two very different generations of the LS engine, which are the Gen III and Gen IV.

What is the best LS motor to swap?

What engine is best for an LS swap? In short, the best engine for your LS or Vortec swap is the one you can afford. Sure, we would all love a shiny new LS3 crate engine from Chevrolet Performance or a rebuilt 5.3L long-block from Summit Racing, but once we crunch the numbers that’s not always possible.

Are LS heads reversible?

Unlike the 8.1L, which uses the same castings, but they’re MACHINED DIFFERENTLY so they won’t switch from left to right.

Are 5.3 and 6.0 cranks the same?

due to stroke differences and each had different casting numbers. … The 6.0L crank has the same stroke (92mm) as the 5.3L and 5.7L cranks.

Are LS 317 heads any good?

317 are the same as the 243/799 head but with a larger combustion chamber as you have noted. So it flows fine. But for a street car, I’d want to bump the compression. If you are running boost… the 317 untouched would be a good head.

Which LS motor is the fastest?

Speed DemonUpdate from the salt: Speed Demon is still the world’s fastest LS engine and the team is looking to step that up even further! The Speed Demon team went to Speed Week 2018 with two main goals: claim the E/BGS record and bring home the HOT ROD trophy given to the fastest single pass of Speed Week.

What LS engine has the most horsepower?

LS7In stock form, an LS7 makes 505 horsepower and 470 pound-feet of torque making it the most powerful naturally aspirated engine that General Motors has ever put in a production car.

What does LS stand for on a Chevy motor?

Luxury SportLS was Luxury Sport and LT was Luxury Touring. LS used to be the high-end (save SS) model back in the ’80s with the CL (Custom Luxury) package.