Finishing the tubing process on the 340 Mopar block for solid roller cam. This blocks off oil to the lifters and increases oiling to the main bearings. Motor will be a 414" stroker. 1
I have never seen “tubing” done before. Still not quite sure of the whole purpose of it. I normally would see folks use plugs with small holes drilled in them to restrict oil flow.
A friend of mine did this with a circle track 360 and it survived three seasons easily I raced a big block Circle Track and never had any oiling issues at all
This is only needed when the oil bypass groove is exposed on either or both sides of the oil channel from unusually high lift or improper bypass groove width or placement.....
Thanks for this video. Been looking info about tubing Mopar smallblock but theres no info anywhere. Going to do this for stroker to eliminate too low oilpressure coused by rollerlifters .
The broach is 0.906, but does NOT make the bore 0.906. Cast iron is pretty elastic. You could hammer the broach through a hundred times, and 101st you would still have to hammer it. Bushing the bores is the best option, for a lot of reasons, but this method works for us low buck guys.
Some roller lifters have an oil band that is uncovered causing an oil pressure loss. I did this block to increase oil supply to the rods and mains. 16 leaks that are now gone. Thanks for watching.
@@CCR414 ok. Thanks. I was aware of the tubes but no one ever explained exactly why. We run a B with a roller but have no pressure issues. We oil the shaft rockers and run through the pushrods too.
@@CCR414 got it. I remember in the OLD dc manuals they put small holes in the tubes depending on lifters but never explained why other than roller lifters. We just did a B with a roller and are oiling the shafts normally and the rockers throw the pushrods with no issues on the dyno but it was hydraulic.
@@burtlandcastor8359 Thanks. I don't know what brand you like, but if you enjoy it that is what matters. To me the work is fun, and I tend to do more than I really need to do.
It's main purpose is to prevent a massive oil pressure loss if a solid or solid roller lifter came out of a lifter bore. You cannot run a hyd cam with the mod.
