I am starting the engine build for my numbers matching 440 six pack motor out of my 1970 Super Bee.

30 years ago, I did an old school rebuild using TRW six pack replacement pistons boring the engine out .030' and turned the crank .010"/.010". We did parrellel deck the block and set them up at zero deck, but nothing too fancy.

I bought a Mr. Six Pack cam this winter and decided to freshen the engine up in an "almost purestock" fashion using everything I have learned in the last 30 years.

Instead of boring the block out to .040" or .060" over, we simply honed it out with a torque plate until it was as round as we needed, then ordered custom Diamond pistons at .034" over. finished bore will be 4.354" with stock 3.75" stroke.

The TRW's with pin weighed 1,162 grams each, and the new Diamonds with a .145" wall tool steel pin weigh only 783 grams...
Saved 379 grams per piston and ended up with higher quality/stronger pieces!

I am using an .043" / .043" napier second / 3 mm Oil Ring package which should reduce friction and free up some HP.

Here are the Pistons with pin.

Cheers,

Arnie

Last edited by cudabin; 03/27/13 11:53 PM.

67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.