Page 97 of Buick Performance Parts Catalog by TA Performance

TA Performance offers Hi-Performance cam bearings for most Buick applications. TAs hardened bearing series incorporates a steel backed alloy material. The hardened bearings also incorporate a larger footprint to distribute the additional loads created by higher pressure valve springs. TAs exclusive Dual Groove Dual Feed Technology bearings are the result of years of evaluation and testing. The dual groove dual feed bearings include the same material specifications as our hardened bearing series with the addition of the dual groove and dual feed technologies on a wider foot print. The wider foot print disburses valve train loads over a greater area and the dual grooves allow oil to be directed around the circumference of the bearing, again, without compromising strength or load carrying ability. When the camshaft rotates a hydraulic wedge is produced (see diagram), this wedge is created as a result of the cam being driven downward by the valve train. This causes extreme loads at the lower half of the bearing, and in relation considerably less at the top. The factory oil delivery location allowed the oil to hemorrhage out at the top half of the bearing and was prone to starving the bearing at the bottom half, especially with higher spring pressures. With the dual feed technology, one of the oil feed holes is located at the 3 oclock position and allows oil to enter just prior to the hydraulic wedge, the other feed hole is at the 7 oclock position and is designed to continue to feed oil through the remainder of the hydraulic wedge and around the rest of the bearing. The dual feed technology is also an oil control feature. The feed holes fan oil across the bearing surface and their location permits the most precise delivery of the oil and considerably less oil bleed out, resulting in additional oil pressure for the rest of the engine. We recommend the Grooved bearings on ALL performance and most stock build ups. Dont waste your time and money doing abnormal, specialty machine work that can compromise the block itself. For considerably less money and 30 minutes of labor, you SOLVE the cam bearing problem, period! 231 V6 w/ 20 bolt oil pan ............................................................................. ............................... $54.95 TA 1557S Single 1.940 O.D. oversize bearing for TA 1559 applications, for oversized or spun journals .... $15.00 TA 1559 350-400-430-455, 231-252 V6 with 14 bolt oil pan ...................................................................... $59.95 Hardened, Dual Groove Dual Feed, TEFLON coated TA 1556 TEFLON Same as our TA 1556 Bearing with Teflon coating on the I.D. of the bearing ................... $85.00 TA 1557 TEFLON Same as our TA 1557 Bearing with Teflon coating on the I.D. of the bearing .................... $79.95 TA 1559- TEFLON Same as our TA 1559 Bearing with Teflon coating on the I.D. of the bearing ..................... $89.95 Part Nos. Hardened TA 1558 350-400-430-455 , 231-252 V6 with 14 bolt oil pan .................................... $49.95 TA 1555 231 V6 w/ 20 bolt oil pan ............................................................................ $39.95 Hardened, Dual Groove Dual Feed TA 1556 TA V3800 series aluminum block and Buick Stage 2 V6 ........................... $49.95 TA 1557 BEARINGS www.TAPERFORMANCE.com TA Performance Products, Inc. 480-922-6807 Order and Tech Line 97 V6 V8 Performance Cam Bearings TA 1559 TA 1559 TEFLON TA 1558 TA 1563 TA 1557 Hardened Hardened Dual Groove Dual Feed Technology Dual Groove / Dual Feed Technology When using aftermarket roller camshafts that do not have an oil channel on the first journal, the grooved cam bearings MUST be used. NOTE:

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