SBC CHEVY 406 ASSEMBLY SCAT CRANK 6 RODS WISECO -13.5cc Dh 4.165 PISTONS 350MJ
$1,825.00
Available
FULLY BALANCED SBC CHEVY
406/408
ROTATING
ASSEMBLY WITH WISECO FORGED
-13.5cc
RD DISH TOP PISTONS.
4.165
BORE,
.040
OVER,
SCAT
INTERNALLY
BALANCED CRANK
SHAFT
6.0"
SCAT COMPETITION RODS. FITS
AFTERMARKET BLOCKS WITH 350 MAINS.
BALANCED IN HOUSE.
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IMPORTANT NOTE
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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 406/408 engine builds.
- Crankshaft Material : Cast Nodular
- Journal Diameter: 350 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: 4.165" ( .040 Over)(408 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.
- 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 Volume |
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58cc |
64cc |
68cc |
72cc |
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406/408 Assembly |
Static Compression Ratio |
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4.165 Bore |
11.39 |
10.67 |
10.24 |
9.85 |
Listed below is a complete breakdown of all the parts that are included in this assembly.
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.
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Attention Valued Customers!
When it comes to highly technical questions, our sales team at Skip White Performance might not always have the detailed answers you're looking for, especially on topics like installation procedures or tuning.
For those with detailed or specific questions, we strongly recommend checking out automotive forums and communities where these products are frequently discussed. These forums are a treasure trove of information and can provide the expert advice you need. Additionally, YouTube has countless tutorials and guides that walk you through the installation process and other technical details.
Please note: While we're here to provide top-notch products, we cannot be held responsible for any damage resulting from the use or installation of this product. Make sure to do your research and proceed with caution!
Thank you for choosing Skip White Performance!
Disclaimer
Skip White Performance is not liable for any collateral damage or incidental issues arising from the use or misuse of our products. High-performance parts are intended for experienced professionals and enthusiasts. Use at your own risk.Product Information
UPC | 333915780365 |
---|---|
Product Type | Shipped Product |
Price (excl. tax) | $1,825.00 |
Price (incl. tax) | $1,825.00 |
Tax | $0.00 |
Availability | Available |
Shipping Cost | 158.5 |
Number of reviews | 0 |
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