Video of My 340 Idling with Comp XE 268 Cam

[65 Cuda 340]

Running a Mopar Performance 761 cam, 270/272 duration, .450/.455 lift. Been in the car since the early nineties. Ancient TRW forged pistons, Eddy heads, air gap, Holley 750 vacuum secondary, TTI headers, TTI 2.5 inch exhaust, Sonic Super Turbo mufflers. It sounds louder in person than in the video.

 

[ryan1964]

20-223-3​

How did you break your cam in I've heard a lot of stories how it went south I just watched a different video from comp cams saying you should pull the inner spring out if you have dual springs is there any truth to that my springs have 100 pounds of seat pressure will they be a problem or can I just run it like that

 

[harrisonm]

What is the cam number probably a 20- number I tried looking up the XE 268 and I'm not finding it

Sorry. No idea. It's been at least 15 years since I put it in. Give Comp a call.

 

[ryan1964]

Ok thank you

 

[1WildRT]

How did you break your cam in I've heard a lot of stories how it went south I just watched a different video from comp cams saying you should pull the inner spring out if you have dual springs is there any truth to that my springs have 100 pounds of seat pressure will they be a problem or can I just run it like that

During break in you want to minimize pressure, less than 300 lbs over the nose, seat pressure seals valves, over the nose controls valvetrain & during break in it contributes to flat cams... If you are running dual springs it's foolish to risk a flat cam by running both during break in... You aren't running it hard enough to worry about valvetrain instability so give the cam it's best chance to survive....

FWIW these days I've been using the Crower "Cam Saver" lifters, they put extra oil between the lifters & the cam lobes. they have a groove ground from the oil band down toward the lifter face...