David Vizard bench flows a BBD 2bbl

kdeboy said
Interesting video. I was really looking forward to this series, mainly to see what kind of ways he'd show to free up parasitic HP losses. If they end up stroking the crankshaft by offset grinding (as he mentioned they "might") then I've lost all interest. At that point it's no longer a 318, more like a 318 with a 360 stroke.

PRH said
In the discussion about the pistons they mentioned “if we can get a light enough piston”.
Of course, they’re supposed to be using only stock replacement type parts.
There aren’t going to be any “light weight” stock replacement pistons.
They should all weight about the same as the factory piece.

He should have better explained why he was testing the carb “as a 4bbl”.
4bbls are rated at 1.5”hg test pressure.
2bbls are rated at 3.0”hg test pressure.

I agree with them using the 4bbl test pressure, so the flow number for that 2bbl is directly comparable to a 4bbl(the numbers most are familiar with).

Keep in mind the number they got is “dry flow”.
Typically, the wet flow of a carb will be about 92% of the dry flow.

yeah, I thought in the beginning they were going to use a "stock 318 2bbl" and see what they could get. Jetting, timing, degreeing the cam, etc. Still will be a cool build, but if we are stroking, regrinding the cam, better pistons..... at that point I'm not sure "mission impossible" fits.