Description
FULLY BALANCED SBC CHEVY 406 ROTATING ASSEMBLY WITH WISECO FORGED -13.5cc RD DISH TOP PISTONS.
4.155 BORE, .030 OVER, SCAT INTERNALLY BALANCED CRANKSHAFT 6.0″ SCAT COMPETITION RODS. FITS GM 400 BLOCKS or AFTERMARKET BLOCKS WITH 400 MAINS.
BALANCED IN HOUSE.
Our eBay user id is: skipwhite, and our eBay store name is whiteperformance1. You may have noticed other sellers using a similar name offering similar products. These other sellers have capitalized on our name as we see it, and many customers searching for us will inadvertently find them, thinking we are one in the same company. There is only one “Skip White.” We are the original premier eBay seller under this name since approximately 2003. We have no other eBay names, nor are we associated with any other company regardless of the similarity in the name or location. Our official company name is Skip White Performance. Please see the article in the lower part of this ad for a more detailed explanation
The picture above is a file photo. See the detailed info below for the actual pictures and items included in this assembly.
Fully balanced in house.
READ THIS LISTING COMPLETELY BEFORE YOU BUY ELSEWHERE!
This assembly comes with a Scat crankshaft and 4340 Scat rods, Mahle High Performace moly rings, King bearings, and a heavy duty 168 or 153 tooth flexplate and a Pro-Sport SFI damper. See our other listings for various piston bores in flat, dish, and dome style. See details above for all the actual specs of this assembly. In the lower section of this ad is information on the various upgrades we offer in our other listings.
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Crankshaft Specs.
- Crankshaft: Genuine Scat, In house Internally Balanced.
- Crankshaft Stroke: 3.750″ for 406 engine builds.
- Crankshaft Material : Cast Nodular
- Journal Diameter: 400 Mains
- Rear Main Seal: 2pc RMS
- Rods: Genuine Scat
- Rod Type: Scat Competition Series, Bronzed Bushed
- Rod Length: 6.0“
- Rod Material: Forged 4340 Alloy.
- Rod Bolt/Cap Screw: ARP 2000 Cap Screws.
- Pistons: Wiseco Fully Forged. High Performance for street/strip use.
- Piston Size: 4.155″ ( .030 Over)(406 actual CID)
- Dome Volume: -13.5cc Dish Top RD. D-Cup
- Compression Height: 1.140
- Piston Material: Forged 2618 Aircraft Alloy
- Piston Rings: Mahle High Performance, Moly, Standard Tension.
- Ring Size and Fit: 1/16 1/16 3/16 File Fit
- Ring Material: Ductile Iron/Cast/Stainless/Moly
- Main Bearings: King MB557SI
- Rod Bearings: King CR807SI
- Balance: In House on CWT balancer.
- Damper: Pro-Race brand Pro-Sport Series SFI 6.61″ Neutral balanced, (Internally balanced)
- Flexplate: Heavy Duty 168 tooth or 153 tooth. Manual Trans. flywheels available. Neutral balanced.
Compression Ratio Chart
The calculations below assume your pistons are at zero deck. Let’s say your compression calculates out to be 10.62:1 for example based on having the pistons at zero deck (flush with the deck), but your pistons were going to be .005 in the hole, then the comp. ratio would only drop to 10.50, and if left .010 in the hole, then it would drop to approx. 10.38 We do recommend having your block decked to allow the piston to set anywhere from flush (zero) to .005 in the hole for optimal performance. We used a 4.200 head gasket diameter, and a .040 head gasket thickness in our calculations to come up with our comp. ratio values.
Part Number |
Cylinder Head |
|||
58cc |
64cc |
68cc |
72cc |
|
406/408 Assembly |
Static Compression |
|||
4.155 Bore |
11.34 |
10.62 |
10.20 |
9.81 |
Our custom made Wiseco pistons are rated very high in the street/strip performance industry. Wiseco normally offer several grades of pistons, starting with the lower grade Pro-Tru Street version made with 4032 forged alloy. The next level up would be the professional series that are much more expensive and made from 2618 aircraft alloy and have fully machined crowns rather than the as cast crowns that are on the Pro-Tru series. Our Wiseco pistons are custom made for us, and have both of these premium features, 2618 Alloy, and fully machined crowns. All premium grade forged pistons on the market have these two unique features and usually cost around $800-$1100 per set.
We have built approximately 8000 engines using the Wiseco pistons over the past 10 years. The engines have been for street rod and strip use. We have seen no problems, nor have there been any complaints. They are an excellent product in every respect.
Important note
Many customers have asked us what size they should bore their block at to allow for a proper piston to wall clearance. The required clearance is built into the piston already. For example if these pistons show a given size such as 4.030 then that is exactly what you will bore the block to. The actual size of the pistons when measured at the skirt, 1/2 inch above the tang will show to be approx. 4.026. The needed clearance is built in. Should you be using these pistons in a marine app. where the boat receives it’s water from the lake, then an additional 1.5-2.0 thous. would be added to your final bore size, and some forced induction apps may also require a slight increase in bore size.
These pistons are totally suitable for use with mid level nitrous or blower setups. Extreme level builds that are making hp numbers in the 1000 hp range will require a set of custom made extreme duty pistons.
Our Wiseco Forged pistons are custom designed with an increase in compression height. This has many advantages. Here are a few facts about compression height and deck height.
Our custom made pistons have a compression height that is .010 taller on bbc pistons, and .015 taller on sbc pistons, as compared to most all of the catalog pistons on the market. We find this to be a very valuable feature.
Since our pistons sit at a taller than normal compression height, you will only have to remove approx. .005-.010 off the deck surface of a virgin block to achieve a zero deck (flush with the deck surface). This maintains the deck’s thickness, making it much stronger than a block that has been cut down .025. The engine will also run a bit cooler with a thicker deck. It’s well known that the deck dissipates much of the built up heat an engine generates. This also allows for future deck re-surfacing without compromising the integrity of the block. Most all catalog pistons on the market require cutting the deck surface around .025 to achieve a zero deck. A zero deck is very important as it keeps the quench/squish zone at or near an optimal .040 distance. Be sure and let your machine shop know what the compression height is on these pistons before they machine your deck surface.
The pictures below are file photos of our Wiseco pistons. The picture on the right was taken with a bright flash and appears to have enhanced the machine marks. These marks are actually barely visible with the naked eye.
The picture below is a generic file photo of a Scat crankshaft. You will receive the correct model packaged in the original Scat box.
Some of the benefits of the Scat crankshaft supplied with this assembly:
The material used in this crankshaft is manufactured from an exclusive Space Age material that was designed for high strength and fatigue resistance. The Scat cranks are 25% stronger than stock OEM cast cranks and are the best value you will ever find. The Scat crankshafts are the best way to build a strong bottom end for, street rods, dirt and circle track racing, and drag strip racing. This crank is suitable for use up to approx. 500-525 hp.
We recommend that you check the thrust clearance on the crank before assembling the engine. This is recommended on any crankshaft, regardless of brand or cost. Also be sure to check your main and rod journal size.
Race balancing: This is for those who want the engine to operate virtually vibration free at high rpm. Extends engine life and frees up a few more horse power. This is a somewhat labor intensive procedure and is not required, but the feel of an absolutely vibration free engine at high rpm is desirable by many. The standard balance job that is included with this assembly at no extra charge is certainly sufficient. With a race balance job, all pistons and rods are match weighed to within 2/10’s of a gram or less, and the final balance is brought down to around 1 gram plus or minus. An ultra smooth engine at high rpm has a noticeable feel and sound to it. If you do not opt for this upgrade, the assembly will still be fully balanced. We spend a good hour and a half doing the regular balance work, and it will certainly meet your needs.
Cost of this race balancing upgrade is $125.00 We have this upgrade featured in our other listings. You can see this and other upgrade options in our ebay store under the “UPGRADES” category, or simply do a search with the key word, “Upgrade” in the search bar when shopping in our ebay store. Before you finalize your purchase of this assembly you may add any of these upgrades to your shopping cart.
SCAT H-BEAM RODS WITH ARP 2000 BOLT: Recommended for those running hard. The Scat Competition rods that come with this assembly are sufficient for most street rod uses, but the Scat H-Beam series rods offer more security against rod breakage under hard use, and they have the huge ARP-2000 7/16’s cap screws. The scat h-beam rods with the ARP 2000 rod bolts have an 800+ Hp rating, and the slight cost to upgrade is well worth it in our opinion. The cost of this upgrade is $150.00.
SCAT or EAGLE 4340 Forged Crank: The SCAT or EAGLE depending on availability forged crank has a rating of 800+ HP. This is the ultimate upgrade for those wanting to run hard. Nos, blowers, turbos, are not an issue with this crank. Even without such power adders, this Crank offers great protection under the most severe conditions. This upgrade also comes with the high Performance King bearings. Should you decide to run power adders in the future, this would be essential. The fatigue life of the 4340 crank over the cast nodular is also greatly extended. We do offer this upgrade in many of our assemblies in our other listings.
Cost of this forged crank upgrade is $685.00 We have this upgrade featured in our other listings. You can see this and other upgrade options in our ebay store under the “UPGRADES” category, or simply do a search with the key word, “Upgrade” in the search bar when shopping in our ebay store. Before you finalize your purchase of this assembly you may add any of these upgrades to your shopping cart.
The upgrades above are all available in our other listings. Some of these are often requested by those building an engine without a machine shop. We find most of these upgrades very valuable for those wanting to take longevity and durability to the next level. They are all bottom end related, and that’s an area worth investing a few more dollars into, in our opinion, especially if you’re planning on running long and/or hard. These upgrades are also valuable for your build history on your engine, and would certainly increase the resale value of your engine, should you ever sell it.
Scat 4340 Forged Crank: The forged Scat crank has a rating of 800+ HP. This is the ultimate upgrade for those wanting to run hard. Nos, blowers, turbos, are not an issue with this crank. Even without such power adders, this Crank offers great protection under the most severe conditions. This upgrade also comes with the HP high Performance King bearings. Should you decide to run power adders in the future, this would be essential. The fatigue life of the 4340 crank over the cast nodular is also greatly extended. We do offer this upgrade as part of many of our assemblies in some of our other listings. They have the key words, “fully forged,” in the title.
Cost of this forged crank upgrade is $685.00 We have this upgrade featured in our other listings. You can see this and other upgrade options in our ebay store under the “UPGRADES” category, or simply do a search with the key word, “Upgrade” in the search bar when shopping in our ebay store. Before you finalize your purchase of this assembly you may add any of these upgrades to your shopping cart.
Some of these upgrades are often requested by those building an engine without a machine shop. We find most of these upgrades very valuable for those wanting to take longevity and durability to the next level. They are all bottom end related, and that’s an area worth investing a few more dollars into, in our opinion, especially if you’re planning on running long and/or hard. These upgrades are also valuable for your build history on your engine, and would certainly increase the resale value of your engine, should you ever sell it. Pricing of upgrades subject to change.
A note from Skip White, company president.
Many people have asked how is it that we can sell this assembly for such a low price. To answer this; we buy our products at master WD (warehouse distributor) level for all of the items in this assembly, and we are selling direct to the public. We are a volume sales based company. Our profit is based on sheer volume, with a very low markup. It is this large volume purchasing that allows us to buy products at a much lower price and we simply pass these savings on to our customers. This is our main competitive edge.
Skip White
Additional information
Interchange Part Number | RA-501A3-300 |
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Part Brand | SCAT WISECO MAHLE |
Manufacturer Part Number | 406G |
Brand | SCAT WISECO |
Manufacturer Warranty | Yes |
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