IMM Engines 408 build

Cudafever said
You sure that's not an exh leak???
I would hate to see you pull the motor apart and spend more $$$ if you don't need too.

As soon as the engine starts sometimes the lifters clatter... it all depends on how long the engine has been setting. Most part no longer than 10hrs or maybe 12...not two days or three. So this has the red flag flying. Sometimes the tap is gone and sometimes it's back... loud as in the video. I would think that a header leak would be there all the time plus I can definitely tell it's coming from underneath the driver side valve cover.

Bobzilla said
I doubt those are Comp lifters in a Magnum engine. Probably Mopar Performance, or Sealed Power, something like that since he said OEM replacements. Those usually hold up decent if the spring pressures are not rediculous, which these shouldn't be. Probably just one lifter having issues. Can you tell which cylinder, or at least which side is making noise?
Also curious why you want to change the cam? Dyno numbers looked pretty stout.

Under the drivers side valve cover.
To be honest I want a cam that has some sound to it AND perform well. I know that sounds immature but it's what I want lol
I'm talking to a guy that is helping me with custom cam selection. Bit more overlap is all that is needed with the intake valve closing at 46º like the cam that is in it now. Might go smaller ... like 43º or so. Using the same lift and LSA.
Also the engine was dynoed using a carb. My truck is fuel injected so I don't believe the dyno numbers are going to reflect what's going to be made in the truck.. maybe more maybe less I don't know.

360duster said
do you run hydraulic roller lifters? These need a lot of preload, around .080" afaik. That´s what i run with mine (stock mopar from a early 90 360 roller cam block - unknown miles), no Problem at all.

Michael

Brian states he goes 3/4 turn on these roller lifters. I'm thinking this is not enough. I thought about adjusting the valves to 1.5 turns see if it will help but as loud as this one is tapping I don't think it will make a difference.