383 Pistons - The Piston Cup

The Only Guide You'll Ever Need For 383 Piston Specs

Bob Mehlhoff May 9, 2007 0 Comment(s)
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Today's hot ticket for big power from a small-block Chevy is the 383. Simply taking any 350 small-block and installing a longer-stroke, 3.75-inch crank and a set of new pistons can get you lots of neck-snapping torque. 383 buildups are commonplace because they are straightforward, offering big improvements in performance and low- to mid-rpm torque, and, depending on the particular performance level, many 383 engines can be assembled on a budget.

With the huge popularity of the 383, the performance market is loaded with a wide range of excellent pistons designed for countless applications. Choosing the right pistons for your particular combo can be challenging, but, armed with the right info, your selection can be easier. So you can check out what's currently available on the market for 383 pistons, we've compiled a detailed guide of the more common choices from various manufacturers, but keep in mind that each company offers several 383 piston variations, far too many to cover in the pages of this story. Depending on each engine's configuration, bore, compression height, rod length, performance level, and the use of power adders, you may face additional requirements. With a 383 installed under your hood, your performance car's acceleration will drastically improve. All you'll need now is better traction.

We Have ClearanceBefore tackling a 383 build, there are some simple cautions to consider. Since a 383 is, by design, a hybrid of specially selected pistons mated to a long-stroke crankshaft, it's important to check the piston-to-cylinder head clearance, including the deck and valve clearances. Connecting rod bolt-to-camshaft interference may also be encountered and corrected during engine assembly. In a few cases, the counterweights on some 3.750-inch-stroke cranks have been found to contact the bottom of some piston skirts. In these situations, simply check with the crank, cam, and piston manufacturers before ordering your parts. Make a final check during engine assembly for rotational interference.

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Arias 1020040
Arias' high-tensile forged 383 pistons are CNC-manufactured from billet material to withstand the added pressures experienced with turbos, nitrous, and blowers. Each piston features smoothly shaped crowns designed to promote good flame travel and combustion inside a variety of chamber shapes and sizes. Arias pistons feature standard or optional forced pin oiling, a pressure seal groove between the ring lands to increase ring sealing, and radiused valve reliefs. The wrist pins are made from high-carbon, case-hardened material. The wrist-pin locks are manufactured from carbon-steel spiral wound or tru arcs.

Bore 4.040 inches
Stroke 3.750 inches
Rod length 6.00 inches
Compression height 1.125 inches
Compression 8.50:1 (approx)
Style Dish
Material Forged aluminum
Head 64 cc
Pin type Floating
Top groove 0.064 inch
Second groove 0.064 inch
Oil groove 0.218 inch
Weight 415 g
Dome volume -28.73 cc
Price $824

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Speed-Pro L2491F 30
The Speed-Pro piston shown is a forged piece, under the Powerforged label. Speed-Pro offers a wide selection of 383 pistons for either street or race applications. Each Powerforged piston is manufactured to weigh within 2 grams per set. The special Duroshield (a molybdenum disulfide coating in a polymer base) applied to each piston skirt enhances lubricity against the cylinder wall, reducing friction and increasing piston life. All pistons are matched within 0.0005 inch.


Bore 4.030 inches
Stroke 3.750 inches
Rod length 5.7 inches
Compression height 1.430 inches
Compression 10.76:1 (approx)
Style Flat, 2 reliefs
Material Forged aluminum
Head 64 cc
Pin type Press or floating
Top groove 11/416 inch
Second groove 11/416 inch
Oil groove 31/416 inch
Weight 497 g
Dome volume -3.4 cc
Price: $320

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GMPP 88962749
The GMPP 383 pistons are specifically designed for use with GM's slightly longer, 3.80-inch stroke. Because GM sells only new 350 blocks with a 4.00-inch bore, the stroke was increased slightly to equal 383 inches with the combination. The GMPP 383 piston shown features a molybdenum disulfide coating in a polymer base applied to the piston skirts to reduce friction.



Bore 4.030 inches
Stroke 3.800 inches
Rod length 5.70 inches
Compression height 1.400 inches
Compression 9.1:1 (approx)
Style Dish, valve reliefs
Material Hypereutectic aluminum
Head 64 cc
Pin diameter 0.927 inch
Pin type pressed
Top groove 11/416 inch
Second groove 11/416 inch
Oil groove 31/416 inch
Weight 530 g
Dome volume -15.5 cc
Price: $300

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JE 232511
The JE Nitrous Series Dome piston is a forged item and provides two big valve reliefs to accommodate oversized valves and high-lift cams with wide lobe separations. The wrist pins use double spiral locks, and the ring grooves are CNC-machined. JE designed this piston for use with angle-milled heads. A thicker crown is used to allow the piston to withstand many of the demands placed on it with nitrous use. The top ring land is positioned 0.250 inch from the top of the piston to help increase strength. Hardened Nitrous Series rings are also available with this series piston.

Bore 4.060 inches
Stroke 3.750 inches
Rod length 6.00 inches
Compression height 1.125 inches
Compression 10.7:1 (approx)
Style Dome
Material Forged aluminum
Head 76 cc
Pin diameter 0.927 inch
Pin type Floating
Top groove 11/416 inch
Second groove 11/416 inch
Oil groove 31/416 inch
Weight 493 g
Dome volume 3.00 cc
Price $767

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Keith Black Silv-O-lite KB733R
This KB Premium forged piston is made from 2618 aluminum alloy and has a solid dome designed to work with Vortec cylinder heads. The underside of the piston is engineered with a V-rib, which promotes weight savings and cooling. The wrist pins are retained with spiral locks and feature drilled oiling holes for added lubrication to the pin.



Bore 4.030 inches
Stroke 3.750 inches
Rod length 6.00 inches
Compression height 1.130 inches
Compression 11:1 (approx)
Style Dome
Material Forged aluminum
Head 76 cc
Pin diameter 0.927 inch
Pin type Floating
Top groove 11/416 inch
Second groove 11/416 inch
Oil groove 31/416 inch
Weight 441 g
Dome volume -6.3 cc
Price $440

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Mahle SBC425040F05
The Mahle PowerPak piston is a forged item that features a phosphate dry-lubricant coating, which protects the piston against ring microwelding and wrist-pin galling that otherwise may occur during start-up or break-in. The piston skirts are additionally protected with a unique Grafal antifriction coating. Each 4032 high-silicone, low-expansion piston forging is hand deburred, and each valve pocket is radiused.


Bore 4.040 inches
Stroke 3.750 inches
Rod length 5.70 inches
Compression height 1.425 inches
Compression 11.3:1 (approx)
Style Flat-top
Head volume 64 cc
Material Forged, high-silicone
  low-expansion aluminum alloy
Pin diameter 0.927 inch
Pin type Floating
Top groove 1.5 mm
Second groove 1.5 mm
Oil groove 3.0 mm
Weight 456 g
Dome volume -5 cc
Price $597

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Manley 590730
Manley's Platinum piston is manufactured from 2618 alloy for excellent high-temperature strength and fatigue resistance. Pressure-balance grooves between the rings promote better ring sealing. All final machining to the piston is performed on the same fixture so that the rings match the cylinder walls with total squareness. The wrist pin is manufactured from tool steel. The piston skirts feature a full-band design for improved skirt stability.


Bore 4.030 inches
Stroke 3.750 inches
Rod length 5.70 inches
Compression height 1.425 inches
Compression 11.1:1 (approx)
Style Flat-top
Material 2618 forged aluminum
Head 64 cc
Pin diameter 0.927 inch
Pin type Floating
Top groove 11/416 inch
Second groove 11/416 inch
Oil groove 31/416 inch
Weight 438 g
Dome volume -4 cc
Price $520

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Probe 12336-030
Probe SRS Forged Pistons are made from forged 2618 T-61 aluminum alloy. The lightweight forging and low-drag skirt help provide quicker revs. The pistons are fully CNC-machined and use tool-steel wrist pins for increased strength. A pressure-equalization channel promotes ring seal to deliver more power. The oil drain-back holes are slotted to keep oil from gathering in the oil ring groove.


Bore 4.030 inches
Stroke 3.750 inches
Rod length 5.70 inches
Compression height 1.425 inches
Compression 10.79:1 (approx)
Style Flat-top, 2 reliefs
Material Forged 2618 alloy
Head 64 cc
Pin diameter 0.927 inch
Pin type Floating
Top groove 11/416 inch
Second groove 11/416 inch
Oil groove 31/416 inch
Weight 489 g
Dome volume -4 cc
Price $532

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Ross 90765
The Ross heavy-duty flat-top piston is designed for use with moderate amounts of nitrous (up to 250 hp). These pistons will work with both 22- and 23-degree valve pocket angles or Vortec heads. The two valve reliefs are machined to allow the use of a high-lift cam with large valve diameters. They also include forced pin oilers and aircraft-quality pins made from heat-treated material.


Bore 4.030 inches
Stroke 3.750 inches
Rod length 6.00 inches
Compression height 1.133 inches
Compression 10.7:1 (approx)
Style Flat-top
Material 2618 T61 forged aluminum
Head 64 cc
Pin diameter 0.927
Pin type Floating
Top groove 11/416 inch
Second groove 11/416 inch
Oil groove 11/48 inch
Weight 486 g
Dome volume -4 cc
Price $560

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Wiseco WIS-K416B3
The Wiseco piston is a maximum-performance XLS (Extra Light Series) flat-top designed for road or drag racing. The pistons incorporate lateral gas ports, which keep them free of carbon for better long-term sealing. Each valve relief features extra-deep valve pockets for use with big cams and valves. The special skirt shape stabilizes the piston in the bore, for decreased wear and increased power. Also of interest, Lunati pistons are designed in conjunction with Wiseco for its specialized rotating assemblies.


Bore 4.030 inches
Stroke 3.750 inches
Rod Length 6.00 inches
Compression height 1.125 inches
Compression 11.3:1 (approx)
Style Flat-top, 2 reliefs
Material Forged 4032 alloy
Head 62 cc
Pin diameter 0.927 inch
Pin type Floating
Top groove 0.043 inch
Second groove 0.043 inch
Oil groove 3mm
Weight (grams) 329 g
Dome volume -4.6 cc
Price $710

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CP S1510
This piston from CP Pistons is capable of operation with up to a 200-horse shot of nitrous or mild boost applications. Each piston is manufactured within 1 gram and features precision ring grooves. The pistons are machined with dedicated left and right installation and will work with all 23-degree cylinder heads. Available from CP Pistons.



Bore 4.030 inches
Stroke 3.750 inches
Rod Length 5.70 inches
Compression height 1.425 inches
Compression 10.9:1 (approx)
Style Flat-top, 2 reliefs
Material 2618 Forged aluminum
Head 64 cc
Pin diameter 0.927 inch
Pin type Floating
Top groove 11/416 inch
Second groove 11/416 inch
Oil groove 31/416 inch
Weight 447 g
Dome volume -5 cc
Price $716

Sources

Lunati
662-892-1500
www.lunatipower.com
Wiseco Performance Products
Mentor, OH 44060
440-951-6600
www.wiseco.com
CP Pistons
Irvine, CA 92614
949-567-9000
http://www.cppistons.com
Manley Performance Products
Lakewood, NJ 08701
732-905-3366
http://www.manleyperformance.com
Mahle Motorsports
Fletcher, NC
888-255-1942
http://www.mahlemotorsports.com
Arias Pistons
Gardena, CA 90249
310-532-9737
http://www.ariaspistons.com
JE Pistons
Huntington Beach, CA 92649
714-898-9763
www.jepistons.com
Ross Racing Pistons
El Segundo, CA 90245
800-392-7677
rosspistons
Probe Industries
Torrance, CA 90505
310-784-2977
www.probeindustries.com
Speed Pro
Detroit, MI 48235
www.goracing.com/federalmogul/
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The Only Guide You'll Ever Need For 383 Piston Specs
Bob Mehlhoff May 9, 2007

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