![]() Therefore cylinder pressure and ignition voltage was low. The 221A was designed in the early 1940's when compression ratios were lucky to be 7 to 1 and octane was around 76. 221B has the numbers milled off but no vent hole as it is used for marine applications. So 221 is the same as 221A but with the numbers milled off and a vent hole added. For instance, the standard 221A cap has the cylinder numbers molded into the cap which doesn't work out correctly if you install the cap on an engine that has a different firing order than a flat head. Most of the others are just modified versions of the standard cap. The standard 221A is the one designed for the flat head. But there are several versions such as 221, 221A, 221B etc. The basic part number for the flat cap is 221A. (the service department does it all the time). Unfortunately the FE Ford versions are no longer listed but any standard bowl mallory distributor can be sent to Mallory and refitted with a flat cap. The new Mallory catalog still lists several "blower" distributors and many marine distributors that use the flat cap. The most common uses of the flat cap at Mallory (other than flat head Fords) are marine engines and engines with blowers because both applications commonly have clearance problems with the standard Mallory cap. ![]() In addition to using them on flat head Ford's, Mallory found that the cap can be adapted to many of the 1970's and later Mallory aftermarket distributors (except the Comp9000 versions) by machining the top of the bowl a little smaller and using a special custom rotor. Mallory is again making flat head Ford V8 distributors for the aftermarket and the same cap that was designed in the early 1940's is still in use (may even be the same mold). ![]() Mallory and Henry Ford played a lot of golf together I hear). Mallory was the OEM supplier of the distributor to Ford during that time. The 8 cylinder flat (crab) cap sold by Mallory is simply a red version of the stock 1942-48 flat head Ford V8 distributor cap. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |