Posted By: MO_PA
Right hand rotation 440 - 03/05/15 12:37 AM
disassembled this 440 with a gear driven cam, cam is like new condition (.235 lift X 1.5 rocker gives .352 valve lift) Should I toss it or build a truck engine using it? Engine had 516 heads.
What can be known about this engines performance?
Posted By: B5 Bee
Re: Right hand rotation 440 - 03/05/15 01:13 AM
Are you sure it's a right hand rotation 440?
Gear drive RBs were left hand, only the cam turned backwards. Compare the oil pump drive teeth to a regular LH drive, they should be cut backwards.
The true right hand 440s I've seen had a timing chain, the crank and cam turned backwards.
Posted By: MO_PA
Re: Right hand rotation 440 - 03/05/15 03:44 AM
It is indeed a right hand rotation engine and as you mentioned, the oil pump drive gear has backwards teeth.
Posted By: VL21
Re: Right hand rotation 440 - 03/05/15 05:31 PM
I know it is not your question, and maybe I am cornfused, but check the knurling on the rear main seal area.
No personal knowledge but have seen mention of "reverse" knurling and oil leaks?
Posted By: Moe
Re: Right hand rotation 440 - 03/05/15 07:29 PM
Boat engines worked like this also?
Posted By: dogdays
Re: Right hand rotation 440 - 03/05/15 07:35 PM
Right hand rotation = regular engine rotation. Gear drive means the cam turns backwards.
This same gear drive would allow use of a standard cam in a reverse rotation engine.
Unless you wanted to keep the gear drive, it'd be easier to swap in a regular cam and a timing chain.
Bullet regrinds hydraulic flat tappet cams for $60. I don't know if they're set up for reverse rotation cams, thoug.
No way would I run a bigblock with a .352" lift cam.
R.
Posted By: B5 Bee
Re: Right hand rotation 440 - 03/05/15 11:21 PM
Seems to be some confusion on what is right and left hand rotation. Rotation is determined just like the left and right side of a car is.
Left - CCW, regular rotation, like in cars
Right - CW, backwards rotation, AKA reverse, common with Chrysler Marine engines.
The gear drive cam is not the same as a reverse rotation cam, only the rotation is the same, lobes are in different locations. The dist drive gear is the same. Also, a gear drive with a regular cam will not work in a reverse rotation motor.
Anyone that parts out a Marine or Industrial motor, save the cams, dist gears and cam gears. There aren't any new cam cores available, much less new dist drive and cam gears. People rebuilding Chrysler Marine motors need them.