GMs 2007 refresh of the Atlas family brought changes to the Vortec 2800 as well.
When introduced, this engine's power was 270 hp (201 kW) at 6,000 rpm and torque was 275 lbft (373 Nm . Piston Rings. You've disabled cookies in your web browser. It would be better if it was longer. 3.780 bore, 1.326 C.H., 7cc dish, Std. Sutter was able to give us a deeper insight into the Atlas program, so keep reading for more.
The high silicon VMS-75 alloy is found exclusively in pistons powerforged by Speed-Pro.
Light Vehicle Pistons - MAHLE Aftermarket North America Exclusive V-rib adds strength without adding weight but allows maximum cooling.
Speed-Pro Powerforged Small Block Chevy Pistons - JEGS This provides the pistons with significantly improved heat removal properties, especially in the first ring groove. Cast solid skirt Piston top, ring belt and skirt form a robust unit.
FERROTHERM A steel piston top and an aluminum piston skirt that are flexibly connected via the gudgeon pin.
TRW NOS forged pistons question - Inliners International Bulletin Board
Trailblazers, Envoys, and other GMT360 vehicles also necessitated some innovative engineering to solve the issue of where to place the 4WD front differential and axles. Off the shelf aftermarket domed pistons for the 1996-2002 5.7L V8 "Ramjet 350" L31 engine may be available and they may fit the 4.3L V6 engine with 1996 and later Vortec heads but I have never noticed . It was the first Atlas engine, and was introduced in 2002 for the Chevrolet TrailBlazer, GMC Envoy, and Oldsmobile Bravada.The engine was also used in the Buick Rainier, Saab 9-7X, and Isuzu Ascender.. The system operated at 350 kPa and used Multec II injectors that were more precise than past injectors.
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These stats far exceeded every comparable V-6 on the market at the time, including GMs own 4.3-liter Vortec V-6. It was the first Atlas engine, and was introduced in 2002 for the Chevrolet TrailBlazer, GMC Envoy, and Oldsmobile Bravada.
CHEVROLET 4.2L/256 Pistons - L6 Engine Type - Summit Racing Apr 3, 2023
Stroke, .Gen.4 Rod, NA/Boost/Nitrous, Coated, 4.8L 5.3L LS Vortec Truck, Set of 8, Estimated USA Ship Date:
( 7 ), Estimated USA Ship Date:
Monday 3/6/2023
They feature coil-on-plug ignition systems,[1] variable valve timing on the exhaust side, electronic throttle control, and a special oil pan with a pass-through for the half shafts in four-wheel drive vehicles. However, it was logistics that squashed that from happening.
Bore, -20.00cc Head Volume, Chevy, LSX, Set of 8, Pro LS 2618 Forged Piston, 3.810 bore, 1.110 C.H., 5cc dish, 4.000in. It may not display this or other websites correctly. Regular grade gasoline was recommended. The cam would then rotate relative to the cam sprocket, creating the different camshaft profile, which changed the timing of the exhaust valves opening. Up to 3,000 tons of force forges aluminum slugs into the basic piston form which creates a grain flow pattern in the structure providing excellent strength, ductility and improved heat dissipation.
In the case of pistons that have a graphitized skirt, another 0.015-0.020 mm should be deducted from the measured piston diameter to allow for the thickness of the layer; this gives the nominal diameter for the piston which is stamped on it. The LL8 was on the Ward's 10 Best Engines list for 2002 through 2005 and was the basis for all the other Atlas engines. The same is true for the cylinder head, which came straight from casting with its intake and exhaust ports already formed. A local guy has a SBC for sale, It has Speed Pro HYPER--- .125 dome pistons ( H618P). Even GMs lineup of V-6 engines is impressive, ranging from the 60-degree V-6 that powered nearly every GM car from 1980 through 2010, up to the twin-turbocharged V-6 powering the Cadillac ATS-V.
Jeff Wieser wanted exactly that for his '69 Pontiac Firebird Sprint. The result is a super detailed engine block that requires very little rough machining. The Vortec 4200 actually had a short-lived racing career. The Trailblazer SS competed most closely with the Jeep Grand Cherokee SRT-8, which debuted for the 2007 model year. Talk to the experts. All browsing and transactions within are secured by an SSL Certificate with high-strength encryption. For model year 2004, the Vortec 4200 was introduced in the all-new Buick Rainier and Isuzu Ascender. For additional protection and to avoid cavity edge or crown fissures, these pistons have a special hard anodized layer (HA layer) on the crown.
CHEVROLET 5.7L/350 Chevy small block Gen I Pistons Bore, Chevy, 4.8L, 5.3L, Set of 8, 4.71 out of 5 stars
[2], The Atlas engines feature aluminum cylinder blocks and heads, with the cylinder bores featuring replaceable steel cylinder liners.[1].
The straight-five produced 220 horsepower at 5,600 rpm and 225 pound-feet of torque at only 2,800 rpm. The entire engine line was definitely set up to add technology to better power and efficiency. Though Sutter didnt specify, a modern take on the engine could include direct fuel injection, cylinder deactivation, and even turbocharging.
These vehicles were designed around the I6 engine. This commonality throughout the Atlas family was certainly a big attraction, both for ease of manufacturing and keeping costs in check. Called the Lost Foam Casting technique, it basically uses a pre-shaped block of Styrofoam buried in sand. Driven by Larry Ragland, the 81 Vortec Trailblazer only competed in those two Baja races before retiring to Raglands garage. He could even be found working on tractors or hay bailers while on vacation at his uncles farm.
That Atlas family had three main members, the front-running 4.2-liter inline-six, the 3.5-liter five-cylinder, and the 2.8-liter four-cylinder.
I agree with the prior response.
Atlas is a name for a family of modern inline piston engines for trucks from General Motors, used in the GMT355 and GMT360 platforms. Estimated International Ship Date:
And he just started swapping one into a Fiat 118G. Starting with 2618 alloy heat treated to high strength T-6 specifications, these give you the best . Due to their high strength and lower wear values, these pistons make it possible to comply with low exhaust and emission standards, especially for diesel engines under heavy loads. Bore, -11.00cc Head Volume, Chevy, LS, Set of 8, Estimated USA Ship Date:
It displaces 3.7L; 222.9cuin (3,653cc), courtesy of a larger 95.5mm (3.76in) bore while keeping the 102mm (4.02in) stroke. The water pump and oil pump were integrated directly into the front of the block. The guys on Hot Rod Garage are building a couple of 4.2l engines to compare with the Barra (an Aussie) engine. The oil pump was refined to limit noise; and the cam-chain tensioner was improved for quieter operation. Its displacement jumped to 3.7 liters thanks to a larger 3.76-inch bore. They have cast-in steel strips but are not slotted.
Its displacement increased to 2.9 liters, again thanks to very slight bore increase.
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Amazingly, the block, crank, head, head gasket, cams, and valve sizes all remained untouched. The long crankshaft presented its own set of inherent challenges. You can order this part by Contacting Us. Over the course of those projects hes gathered a lot of information on the motor and shares it on the Vortec 4200 Wiki. Wieser attributes much of the reliable power results to tuning by Mark Romans, who used his HPTuners software to dial in the spark and fuel. This includes the alternator, A/C compressor, and idler pulley. Each rod set for the GM Vortec 4200 inline 6 engine includes ARP2000 series fasteners which are a Molnar Technologies proprietary design, assembly lubricant and installation guidelines. Apr 24, 2023
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If you are an international customer and would like to change the currency that prices are displayed in, you can do so here. The Atlas program got its start around the same time, with GM sold on the benefits of an inline engine. Each component besides the power steering pump was mounted directly to the block.
If you are Building ANY style of the GM Atlas Vortec 4, 5 or 6 Cylinder In-Line Aluminum Engines.You will save yourself ONE HUGE PITA by avoiding the use of Standard Spring Steel-Hex Wrench Clamped or Ratcheting Pliers Style Piston Ring Compressors and opt instead to get a Wiseco 93mm One Piece Tapered Special Tool for this Purpose. Mar 29, 2023
Use Style C rings (1/16", 1/16", 3/16"). You must log in or register to reply here. (4.000" bore x 3.48" stroke). Pistons.
The Vortec 4200 featured a deep-skirted block that added strength to the crank area. The engine redline is 6,300 rpm. CHEVROLET 5.7L/350 Chevy small block Gen I Pistons - Free Shipping on Orders Over $99 at Summit Racing Bore (in.) The length of the engine and its structure definitely played a part in that, Sutter said. It displaces 4.2L; 253.9cuin (4,160cc), with a 93mm 102mm (3.66in 4.02in) bore and stroke. The beam also helped reduce vibration and noise, while reducing the chances for an oil leak. The 4.2-liter Atlas LL8, otherwise called the Vortec 4200, was a groundbreaking engine for GM. Another I6-powered truck won the truck class at the Pikes Peak International Hillclimb.
Forged solid skirt This type of piston can mainly be found in high performance series production and racing engines. Engine oil flowed into the phaser and operated a helical spline and piston. General Motors has a long history with making innovative strides in engine development. Naturally, the demands on pistons have also risen progressively: they must be lighter, must have lower oil consumption and must be absolutely safe and reliable. This kit is for a 4.00" Standard Bore Engine. On this episode of HOT ROD Garage, hosts Tony Angelo and Lucky Costa are going to take on the legendary Aussie engine, the Ford Barra. A third-party browser plugin, such as Ghostery or NoScript, is preventing JavaScript from running. In '05 its GM says the result was a smooth idle, a 25-percent reduction in hydrocarbon, and a 40-percent reduction in NOx gasses. On this Wikipedia the language links are at the top of the page across from the article title. Wieser thinks he can squeeze 10 pounds of boost out of the turbo to make 500 hp, but he also has plans for a new, more aggressive 4200 with forged pistons, aftermarket rods, and a later '07 head that will allow him to punch the power up to perhaps 600 hp with 14 to 15 psi. GM also broke ground in the SUV segment by using dual overhead cams with roller-followers to control the four valves per cylinder.