The contacts may wear or burn away, which would make the points gap larger and decrease dwell. This may be even more important if you also install a high output ignition coil which draws more current, which may noticeably shorten the life of single points. Whether you have the Mallory Unalite or Dual Point with or without our Power amplifier you will find below a wiring diagram to suit and also the original instructions that come with the Mallory distributors. This is why 12-cylinder engines commonly use two 6-cylinder distributors. For more recent exchange rates, please use the. With single points you set the contact gap first, then run the engine (or spin the distributor) to check dwell, then re-adjust the points (if necessary) to get the correct dwell. 143-180 mallory dual-point distributor|mallory dual-point distributor So if you want longer dwell, stick with the original Lucas distributor. There is one more notable feature of the Mallory Dual Points distributor. 235-261 Chevy Dual Point Distributor. For various distributors dwell can be anything from 30 degrees down to 60 degrees, and open circuit can be anything from 60 to 12. Mallory's classic dual point distributor can be tailored to suit any engine tune. $99.99. points may transfer material from one to the other, leaving a pit in one side and a peak on the other side. The 283 CI engine had a GM Duntov 067 cam and 11:1 Corvette GM (TRW) forged pistons, 3-2 bbl carbs from a '66 GTO, 3-speed O.D. Find Mallory Ignition 2527501 Mallory Point Distributors and get Free Shipping on Orders Over $99 at Summit Racing! With two contact sets mechanically offset by 9 degrees, the closed period for the two sets overlaps by 23 degrees but extends the total dwell angle from 32 degrees to 41 degrees. 5 out of 5 stars (1) 1 product ratings - Mallory Dual point Distributor #2556701. $60.00. Out came the Mallory. Vintage Mallory complete dual point distributor MoPar, Dodge 413,426,440 V8. Free FAST Shipping, 60 Day Returns, Expert Tech Support, Free FAST Shipping, Free Returns, Expert Tech Support, Amounts shown in italicized text are for items listed in currency other than Canadian dollars and are approximate conversions to Canadian dollars based upon Bloomberg's conversion rates. SB & BB Chevy Engines, Mechanical/Vacuum Advance, Optical Pick-Up, Billet Body, Used condition, local pickup, South Bend, Indiana The Lucas 4-cylinder distributor has dwell of 60 degrees. mallory tune-up parts 25 and 26 series 27 series contact point adjustment 8 cylinder mech. With the dual points distributor, the first points set to close "makes" the circuit and will incur any ravages caused by a small amount of arcing when closing. C $102.64. The answer is stability, durability, accuracy, and a certain ease or convenience of adjustment. The real reason for using dual points is for improved life, long term stability and reduction of service calls, but has naught to do with increasing dwell. Click here to shop for Mallory Dual Point Distributor and get free shipping with guaranteed lowest prices. £168.52. Super-Duty Cap and Rotor feature brass terminals to prevent shorting and arcing. So if neither dwell nor open time is particularly important, you might ask why dual points may have any advantage. 283-454 Chevy SB BB DAY 2. Part number only ship to the lower 48 states. This is a Mallory dual point distributor for a ford v8 351w. Mallory Dual Points distributor has total dwell of 40 or 41 degrees (depending on which spec sheet). MALLORY DUAL POINT DISTRIBUTOR YL-482-HP MECH. By simple observation it is obvious that the points are closed about twice as long as they are open, so you have 60 degrees dwell and only 30 degrees open. Number of bids and bid amounts may be slightly out of date. This page was last updated: 08-Feb 20:08. The Mallory was not running correctly so we drove to the Mallory Headquarters in Dearborn, Michigan. This Distributor will fit all RB block Mopars, 426, 440, 413, 426 ... Mallory Dual Point Distributor for Mopar 440 - $100 (Show Low) Mallory Dual point distributor. Contact points "wear" with use in various ways. I used it in both a 292 and 312 stock and modified. Mallory single points distributor has dwell of 35 degrees. This reduction of running heat leads to less wear on the rubbing foot as well as the contacts. If you set idle timing to 10 degrees BTDC, and there is no vacuum unit, and you want 36 degrees total spark timing at road speed, you can set the mechanical advence limit to 26 degrees. A legend has returned: the Mallory Unilite Distributor is back! 1 product rating - Mallory Dual Point Distributor 2563401 Oldsmobile V8 350-455. As dwell is increased the points open later and close earlier, and vice versa for less dwell. Just in case anyone runs into this issue again with an old Mallory dual point - after getting the small block dual point Mallory distributor apart, although the points plate was a different part number the cam plate was the same number as the big block distributor and interchangeable.