Chevy SB Speed-Pro Competition Series Main Bearings
Federal-Mogul's Sealed Power Speed-Pro Competition Series Engine Bearings
Sealed Power Speed-Pro brand builds engine bearings using materials and alloys engineered for demanding applications. Speed-Pro tailors there bearings to withstand punishing racing conditions. Federal-Mogul's Speed-Pro bearings are proven winners in NHRA, NASCAR and IHRA competition.
Sealed Power's Speed-Pro engine bearings include a patented contoured-flange design that increases thrust-load capacity and a three-quarter-length oil groove that enhances lubricity without compromising load capacity.
The materials in Sealed Power's Speed-Pro bearings offer a variety of advantages, such as high durability, corrosion resistance, decreased rate of wear and increased fatigue strength. These advantages are all essential features for performance engines that need to withstand punishing racing conditions.
Sealed Power's Speed-Pro DUROSHIELD Competition Series Coated Bearings provide protection against dry starts and conditions that interrupt oil supply. Speed-Pro’s H-14 Super Duty Alloy has the greatest load-carrying capacity. Sealed Power's Speed-Pro H-24 Alloy is notable for its desirable fatigue resistance and strength.
Sealed Power's Speed-Pro B100 babbitt material is used in ultra-high-performance rod and main bearings for blown-fuel and alcohol engines that require high “embeddability” and conformability.
Bearing Material Selection for Performance When Selecting bearings, engine builders commonly focus on getting the proper clearances and maintaining adequate oil pressure. Durability is expected from any bearing that is chosen, and the advantages of different lining materials may not be considered. When an engine's operating conditions are considered, and bearing materials are chosen accordingly, the likelihood of success is greater.
In street driven applications there are a number of materials that will do an excellent job. Each material has advantages in terms of resistance to corrosion, rate of wear, and fatigue strength. The latter characteristic is most critical in racing engines that operate under high loads, generate considerable heat, and may be subjected to occasional detonation. No bearing can withstand detonation, but the use of superior materials can improve the bearing's load carrying capability.
Federal-Mogul / Sealed Power's heritage of industry leading technology is reflected in the Sealed Power and Speed-Pro engine bearing product lines. Sealed Power's offers unique materials and alloys engineered for demanding applications. Speed-Pro engine bearings are specifically tailored to withstand punishing racing conditions.
Federal-Mogul / Sealed Power's Material Descriptions:
H-14 Super Duty Alloy (CH) Sealed Power's unique high performance H-14 lining material is bonded to a high strength AK1020 steel backing for unparalleled bearing durability in high load racing engines. This material will outperform competitor products by a wide margin in virtually any application from street performance to all out racing. Sealed Power highly recommends this material for any performance use. (Except for blown race applications, which use Sealed Power's Babbitt bearings)
Copper-Lead (CP) This material is referred to as H-24, and is noted for it's desirable fatigue resistance and strength characteristics. It provides the embedability and conformability required in many applications. This is Sealed Power's standard material, and is easily comparable to many competitor's performance bearings. Suitable for both street and moderate competitive use, but not as durable as Sealed Power's H-14 Alloy in racing usage.
Babbitt (SH) Intended for applications which require high embedability and conformability, such as blown fuel or alcohol engines. Not recommended in engines that are intended for longer service life.
Aluminum (AP) Provides excellent fatigue resistance and conformability, along with the corrosion resistant properties associated with aluminum. Primarily street use along with mild competition.
Aluminum Alloy (RA) Specified for applications where a high degree of corrosion and wear resistance is desired.
Some Key Notes To consider
H-14 Alloy -- Speed-Pro Engine Bearings (when strong is better than pretty) The unique H-14 lining material found in Speed-Pro bearings was specifically designed for high performance, and has a far greater load capacity than any other material. Sealed Power bonds this lining to an extra high strength steel backing, creating the best performance bearing in the industry. These materials are Federal-Mogul exclusives, and are not available from any other source.
One key to reducing fatigue wear in a bearing is to keep the overplate thickness to a minimum. The thinner material will less susceptible to repeated deformation under load. The only downside to the very thing overplate layer is a reduction in embedability - the bearing surface is more susceptible to damage from debris. Frequent oil changes and religious maintenance are mandatory when using Speed-Pro bearings, a small price to pay for the increase in durability.
Speed-Pro bearings have an unusual appearance. They lack the traditional white/gray color because the flash tin plate process has benn eliminated. Flash tin plating enhances cosmetic appearance and provides a measure of break in protection, but the tin may migrate across the steel back under racing conditions and cause undesirable high spots on the I.D. of the bearing. These high spots can intrude into the oil clearance and become concentrated load areas susceptible to premature fatigue. The tin may also migrate into the lining material, reducing its strength. As an added benefit, elimination of the flash tin plate allows greater dimensional accuracy. If your engine will be used in competition, or for high performance street use, Northern Auto Parts highly recommends that you select Speed-Pro rod bearing and main bearing sets.