[Wade Congdon]

PJack,

I am not for certain if the vintage Pontiac cranks used "straight shot" oiling or not. They may have had some early version of it, however I beleive Crower is credited with the modern straight shot oiling system we are implementing of these cranks.

As far as a timeframe on the 3.25 inch main cranks we just flat out don't know yet. As soon as we have what we beleive to be reliable information, you guys will be the first to know.

[Jack Gifford]

Originally Posted by Wade Congdon

... I am not for certain if the vintage Pontiac cranks used "straight shot" oiling or not.

They do, as I said before.

Originally Posted by Wade Congdon

... They may have had some early version of it, however I beleive Crower is credited with the modern straight shot oiling system we are implementing of these cranks.

Your photos show the drillings to be identical to 'vintage' cranks, so what aspect of it is "modern"?
What I'm lacking is a post-'60 Pontiac crank to look at, to observe the rod journal oiling scheme- anybody?

[johnta1]

Is 'cross-drilled' (Pontiac crank) and 'straight shot' the same is what Pontiac Jack is saying I believe.

I believe all 3.25" main cranks were cross-drilled.

[johnta1]

Looking at post #37 pics provided by Wade, the 'straight shot' is different than the 'cross-drilled' crank.

The Pontiac cross drilled crank has the oil hole on the main drilled to the opposite (180º) side of the same main. The rod journal hole is in the same spot.

Wade's pic looks like the rod journal hole goes 'straight' through to the main.

Look at the pic in HO Racing's Engine book for a pic of cross-drilled.