SCAT NODULAR BLOCK CHEVYTO BE EXTERNALLY BALANCED CRANKSHAFT FOR2pc REAR MAIN SEAL BBCCHEVY ENGINES.
A complete set of King rod and main bearings are included with the crankshaft.
The part number for this crankshaft is 9-454-4250-6135-R-KIT This is a first line product directly from Scat engine products.
If you do not need the engine bearings andwishto order justthe crank, please email us and we will gladly create a listing for you at a discounted price for the crank only.
For technical info please call at 423-722-5152
Scat 9000™ Series crankshafts are manufactured from an exclusive Space Age cast steel material that was designed for high strength and fatigue resistance. The 9000™ Series cranks are 25% stronger than stock OEM cast cranks andare the best valueyou will ever find. The Scat crankshafts are in our opinion the best wayto build a strong bottom end for your, street rod, dirt circle track racing, and drag strip racing performance engine.
This crankshaft is brand new factory sealed, not a blem. Beware of sellers offering no name cranks. We sell plenty of no name products, but when it comes to crankshafts, we have seen an array of problems with these crankshafts. It just doesn't get better than Scat when it comes to crankshafts. The cost may be slightly higher than some of the others available, but we know for a fact that Scat is far superior to any of the other low cost cranks on the market.
This crankshaft is for building a 489-496 stroker engine using a 454 block.
For use in 1990 & older big block Chevy engines with the 2 piece style rear main seal. 4.250" stroker crank. King rod and main bearings are included. This crank is externally balanced. See our other auctions for the internal balanced series.
Crank weight isapproximately70 lbs. and is to used as an internally balanced setup.
Counterweights are profiled for 6.135" or longer connecting rods.
4.250Stroke Crankshaft -489/496 Stroker engines.
6.135" Is the Minimum Connecting rod length required -
Externallybalanced - Must be balanced prior to assembly
2.750" Main Journals - STD
2.200" Rod Journal - STD
2 Piece Real Main Seal
Muchstronger than stock OEM cast cranks
Precision ground and micro polished in the USA by Scat!
Chamfered oil holes for improved high RPM oiling
Horsepower rating: To 700+ HP
RPM Rating: to 7000 RPM
Scat 9000™ Series Crank Features:
- Made from an exclusive Space Age cast steel material for strength
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No more hassles with poor quality OEM crankshaft cores
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Knife edged counterweights
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Straight shot oil holes for improved high RPM oiling
- Precision ground and micro polished.RPM Rating: to 7000 RPM
Notice the finish quality on the journal. This is the best finish we have ever seen on any brand of crankshaft. Our machinist that does the balancing made special note of how much harder these cranks were compared to any of the other cast nodular cranks on the market. This crank is for use with 2pc. rear main seal blocks. We also have the 1pc. version of this crank kit in our other listings.
The Scat Crankshaft is one of the best values you will ever find when it comes to crankshafts. These cranks are far superior to any of the other low cost cranks on the market. We feel the same way about the King bearings. The bearings are included with the crankshaft.
We have used King bearings exclusively in every engine we have built for the past 20 years. The King bearings are not only of outstanding quality, but they are very unique in design. Here is where quality, design, and value all come together. These are simply the best bearings on the market.
This auction is for a Scatbbc496 crankshaft 2PC REAR MAIN SEAL, and a full set of Kingrod and main bearings.
We have ran the King bearings in brutal applications, and never experienced a failure. The King Bearing company makes engine bearings only. They also offer a high end race series bearing, and are used in engines costing $50,000.00 or more. The name King may not be as well known as some others, but rest assured, they are very well known in the racing industry as the ultimate bearing company. Below are some of the unique features about these bearings.
Engine bearings are a very critical item, and must be of high quality. We know for a fact that there are many inferior bearings on the market, and many of the so called name brands outsource theproduct to manufactors that simply are not into building high end bearings.They don't address any of the critical factors such as metulargy and design. The King bearing company specializes in engine bearings, and are atthe forefront of technology when it comes to making bearings. We never have considered anything but this line of bearings, and cost was certainly not a factor, as we are very aware that an engine bearing has to be perfect and should it cost slightly higher than most others, it's well worth it.
THE BENEFITS OF USING KING ENGINE BEARINGS
Tri-metal vs. Bi-metal Bearings
Traditional rod and main bearing construction is based upon a three layer configuration composed of a steel backing, a copper-lead layer and a very thin overlay of babbitt material only .0005" - .0008" thick.
King’s bearing uses just two layers, a high strength steel backing plus a bonded layer of "Alecular" bearing material .012" - .015" thick.
Alecular material is used exclusively by King. It is an alloy of aluminum, tin, copper and several other elements. Because it is an alloy, it maintains its properties throughout its entire depth, delivering consistent and reliable performance.
Benefit No.1 - Particle Embedability
More than half of engine bearing failures are caused by metallic particles which scratch crank journals and tear or weaken thin babbitt overlays such as in the tri-metal bearing.
Since King’s Alecular bearing layer is much thicker than the babbitt overlay (.015" vs. .0008"), it provides eighteen (18) times more embedability than a tri-metal bearing to catch and hold particles so they don’t scratch the crank journals. This is especially true for particles over .0004" in diameter which cause most of the damage.
Benefit No. 2 - Conformability
The much thicker layer of Alecular bearing material (.015" vs. .0008") allows the bearing to conform to problems such as metal to metal contact when there is mis-alignment present or the connecting rods stretch. Greater conformability means fewer bearing failures.
Benefit No. 3 - Temperature Resistance
The Alecular material’s melting/fatigue point is over 11000 F, almost three times that of the thin babbitt overlay in a tri-metal bearing (400OF). This means added protection against localized overheating due to mis-alignment, detonation, overloading, loss of coolant, etc.
Benefit No. 4 - High Load Capacity
Alecular bearings successfully withstand the stresses of blown, nitro-methane burning Top Fuel dragsters generating 5,000 hp at 8,000 rpm and in 700 hp circle track engines running for extended periods of time. The same metallurgical alloy is used in King’s street bearings that is used in King’s High Performance bearings, so the regular bearing user gets the advantage of the alloy developed and used in race engines.
Benefit No. 5 - Control of Wall Tolerance
Bearing -to- journal clearances on main and connecting rod bearings can be affected by several variables, all of which the engine builder must try to control. King has removed concerns about inconsistent shell to shell bearing wall thickness by the use of statistical control methods to keep wall thickness to very limited variation.
Other manufacturers produce bearings whose wall thickness at the crown can vary by up to + .00025". King bearings are produced using "Bull's Eye" specs which set a higher standard of controlling the wall thickness, permitting no more than + .00010" variation of the desired thickness.
The benefits of tight control of wall thickness tolerance are:
- Improved consistency of bearing to journal clearance. No more trying different bearings within a set to get the "right" fit.
- Superior eccentricity and crush relief values for a better oil "wedge" and less journal wear.
- Less taper across the bearing face, meaning superior wall stability, a more parallel wall and better oil film development.
- Crankshaft grinder does not need to grind cranks "fat" or "thin" to compensate for bearing variations.
Benefit No. 6 - Crankshaft Endplay
All bearing companies solve crankshaft journal wear by supplying oversized bearings. However, King went two steps further with the development of Max Flange and Pro Flange. Max Flange reduces endplay by supplying the flange on the high side of the tolerance to compensate for crankshaft thrust surface wear; this process is used on all King bearings. Pro Flange are bearing sets supplied with oversized flanges allowing the thrust surface to be ground to .010", .020", or .030" undersize.
PAYMENT AND SHIPPING DETAILS
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If you checkout and start over, the auto calculator will not recognize the multiple purchases, and there will be no shipping discount. Should you decide to start purchasing again after checking out, you willneed to contact us so we can calculate your shipping for you.
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FedEx Home Delivery delivers Tuesday - Saturday. If apackage leaves here on aThursday, and youare in a 2 day deliveryzone, your package will deliver to you on Saturday.If you are in a3 day zone, and your package leaves on aThursday, you will not receive it until Tuesday.Expedited shipping is available upon request for an additional fee. Please contact us forrates.
Hawaii and Alaska have a 6+ dayestimated delivery time.
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