Conn47D24 Posted March 2, 2019 Report Share Posted March 2, 2019 Curious about this. Why did L6 mopar cams change from 1" to 1 1/8 " ? Quote Link to comment Share on other sites More sharing options...
Andydodge Posted March 3, 2019 Report Share Posted March 3, 2019 Conn.........what measurement are you referring to?....andyd Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted March 3, 2019 Report Share Posted March 3, 2019 Probably the camshaft gear mounting hub to cam diameter measurement . 1 Quote Link to comment Share on other sites More sharing options...
Conn47D24 Posted March 3, 2019 Author Report Share Posted March 3, 2019 Yes The end that the hub is pressed on. Size changed about 1951?? Hollander interchange indicates that the cams are the same for some models if you just change hubs. Wonder why the change came about. Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted March 3, 2019 Report Share Posted March 3, 2019 Looking thru my passenger and truck master parts books 1952-53 looks like the transition period. 1 Quote Link to comment Share on other sites More sharing options...
thisoldtruck Posted March 4, 2019 Report Share Posted March 4, 2019 I’m curious about this too. The larger block engines, 25”, still used the 1” size. Andy Quote Link to comment Share on other sites More sharing options...
oldasdirt Posted March 13, 2019 Report Share Posted March 13, 2019 On 3/2/2019 at 5:21 PM, Conn47D24 said: Curious about this. Why did L6 mopar cams change from 1" to 1 1/8 " ? They moved to 1 1/8 1st on the canadian 25 1/2" engine in the bigger truck engines and by 1951 all the canadian 25 1/2" camshafts have the larger hubs. I had George Asche tell me if he was regrinding a wild cam he would always use a 1 1/8" cam. That doesnt answer the reason why but given they seemed to start in the heavier trucks it likely had something to do with strength or longevity. A call to George Asche or Tim Kingsbury would likely reveal more than I have for you. 1 Quote Link to comment Share on other sites More sharing options...
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