Parts needed to hop-up a Cummins Big Cam

My guess is not for very long if they are using all the HP the engine can produce. Head walk, deck grooves, cracks from head bolts to liner bores, broken crank, are all very possible, and probable, on high HP Big Cams.

 

Except if it does have the 17.1 pistons in it a cam change is required as well to match up with the 14:1 pistons. Most like if it is a high comp engine the timing is set at .117 or some where close to that, to make it live he's going to have to possibly change the timing and maybe even the cam.

 

Yes the 3406 is.

If/ when you change the pistons, the lower compression will help the longevity. I myself have never popped a head bolt or blown a head gasket.

 

You will NEVER, EVER go wrong with a 3406. I to own a BC1 cpl369(its parked) and it was hop up, Over 300 psi on the full pump, oversize injectors and a Holset HT4b turbo. But compared to my 3406, its like not and day in favored of the 3406

 

Nope, I run around 60 psi of boost on my 3406B and its still holding, even had nitrous on it at one time. My big cams havent seen that sort of boost, but i know of a couple that have and the head gaskets are still holding strong.

Compression is a big factor, my 3406 is 14.5:1, one of my big cams is 13.5:1, and the other has 14.5:1 pistons in it. If the timing is set to match, they can be made to live, Im just not sure how long at 650 hp.