Hi I am new here, I am thinking about buying a 1970 Lincoln 460, but I need to know what the cam profile is and what measurements the pistons are so I can get forged. Thanks in advance.
I tried registering at 460.com but that was like 2 weeks ago and this seems like another good place to get the answers I seek. I am looking to keep the engine fairly stock other than a port and polish, aluminum intake and a different carb and better ignition system, ohh and a windage tray, but I would like to know the original cam specs like duration and lobe and lift so I can fine something after market that is very similar, And I would like the pistons to be forged or at least hypereticute (I know I can't spell lol). Thanks for any help you may be able to give. Anyone know what the connecting rod length is on this motor? again its a 1970 lincoln 460. thanks guys
The engine is just a standard 460 of that era. Rated at 365 horsepower @ 4600 and 500 ft/lbs of torque @ 2800 and the compression was 10.5 to 1.
The rods are 6.605" c to c.
The cam is 256° intake and 270° exhaust with 36° overlap and .278" lift on the lobe and .487" at the valve.
The bore is 4.36" but can't help you with the piston profile other than they are dished and the pin is offset 0.625".
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Bear 45/70
Gimp Racing
Don't pick a fight with an old man. If he is too old to fight he will just kill you.
Thanks very much. This motor says on the car its in its rated at 385 horsepower and it says it needs premium. Does this make a difference? as far as the cam profile goes? And does anyone know where I could find some forged pistons that would fit at? summit racing says all they can get is cast. Thanks again very much for the help. sorry forgot to ask something is the .487 the lift at the exhaust and what is the lift at the intake? is it .278? sorry for all the questions thanks for the help.
Last edited by 1970460 : 05-16-2008 at 04:43 PM.
Reason: more info needed
They played a bunch of games with horsepower ratings back then and they all need premium fuel with a 10.5 to 1 compression. Are you sure it says 385 as even the CJ or Boss 429 weren't rated that high. Can't help you with forgings as I don't rev my 460 motor past 5000 rpm (usually only 4000 to 4500 max) and forged is not required for that.
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Bear 45/70
Gimp Racing
Don't pick a fight with an old man. If he is too old to fight he will just kill you.
yeah has a little badge on the old lincoln on the front radiator mount that says what size motor and the rating for the engine. So the correct cam profile would be 256 degrees intake and 270 degrees exhaust with but still can't find any cams with that many degrees and only .478 lift on the exhaust? are the lift measurements at 50 or at 36? thanks again
Ahhhh I think I understand. So what would the old specs be at .50 so I can find a newer cam shaft? thanks sorry I'm not understanding this. My old 460 was much easier it was a 1977 out of an LTD, since it had emission style heads the build was easy, no need to try and match the original.
Just a thought that no one here has mentioned here yet. I think the heads have to be done with hardened seats to hold up to running unleaded fuel. Since it is a 1970 engine, and they ran leaded gas back then. Not sure if you were planning on going that far or not. Someone correct me if I am wrong here.
nope youre right, it should have hardened seats put in to run pump gas. as for a cam why would you want to put a stock cam back in? there are lots of aftermarket cams that are better than the stock one... also what are you using the motor for? hyper pistons may be a better choice than forged because theyre more thermally stable so if you want an engine that will go 100k+ you may want to go hypers... but they dont take detonation at all. forged pistons will take detonation and bad tune much better than hypers but they expand and contract so much that they wear the rings out at around 75-100k miles.
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