We have developed our Adjustable Tension Alternator Bracket kit for use on 79-91 12A & 13B engines. The purpose is to allow users to achieve the correct level of belt deflection.
For years we have had engines come in to the shop with aggressive front/rear stationary gear bearing wear. One of the main causes of this wear is over-tightened belts. When the alternator belt is too tight it actually pulls on the e-shaft leading to excessive wear on one side on the bearings.
Having proper belt tension also reduces waterpump and alternator bearing failures, as well as increasing belt life.
Our Adjustable Tension Alternator Bracket is fabricated from 3/16" laser cut steel, it is then Powder Coated Black to prevent corrosion. The kit comes with stainless steel hardware.
On cars that no longer use the air pump, we’ve seen that occasionally the belt to the water pump will slip at high RPMs. This is a result of the air pump to waterpump belt missing. The slippage can cause insufficient cooling to the engine and increase the chance of severe damage. To remedy this, we recommend installation of this pulley kit in a dual belt configuration.
The Pulley in our kit is the same diameter as stock, with, so there are no charging issues at idle caused by underdriving the alternator.
Kit includes: 1 Stock Diameter 15mm Bore Pulley and 2 Belts.
Banzai Racing Aluminum Dual Belt Alternator Pulley Kit for installation of the 93+ RX-7 (FD) alternator in the 79-91 RX-7. Our pulley has the spacer machined into the rear side.
The pulley in our kit is the same diameter as stock, so there are no charging issues at idle caused by underdriving the alternator. This is a 17mm hole pulley.
Kit includes: 1 Stock Diameter 17mm Bore Pulley and 2 Belts.
Available in Natural Aluminum or Black
Order kit according to the water pump housing on the engine, 89-91 requires 1/2 longer belts due to the casting difference
Matched set of replacement belts for the Banzai Racing Dual Belt Alternator Pulley Kits
Sold as a pair
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If you have questions or comments, you can contact us by Phone: 574-594-2035 or Email us: email@example.com
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