It was the deal, back years ago
I had quite a few old offset grinds, in a few different combo/cars
edited;
most of the racecar/street-er combo's were checked for structure
no cracks, no porosity in forgings, re-hardened (surfaced)
nitrite'd afterwards & re-balanced too
they did it a lot in spint-cars engine combos too, SBC & SBM combos
I had a buddy that did a BB 400 3.38" crank (real bastard combo)
to 0.200" offset grind 3.58" stroke, in a god awefugly 73 RR
going off memory, IIRC was 0.030" over 4.370" low-deck 429cid,
short stock length big bolt BBC rods resized, also internally balanced
(don't remember the bearings)
pistons were custom units/like $700 back in the mid-late 80's,
to my shock it was a real beast, but he didn't need a bunch of RPM,
it was mostly just a cam'd up bumpty bump cruiser/daily driver really,
he won quite a few street races too, he had that combo for a decade or more too
I never had a crank failure on an offset grinding
albeit; I had a lot of aluminum rod combos too
Pisano Bros lightweight Childs & Albert rods, lightweight Venolia pistons
far less rotating mass
500cid modern Pro-stocks are
high compression huge bore & short stroke
high rev combos, radical camshafts, short lived high pressure valves-springs etc.
most all now are depending on specific combos de-stroked if anything,
or more like custom/specific strokes/grinds/billets,
some of the bigger High $$$ teams, even
are in house machining now for their own custom combo
generally:
NHRA P/S a min. of a 4.60" to 4.750 bore "usually"
& 3.50" strokes for the bigger bores to
& 3.75" strokes for the lessor bores, not many of them
they are nothing like these combo, we are discussing here
not unless they are mountain motor IHRA huge cid etc.,
really still nothing like what is being contemplated here
NHRA style builds, even in Nitro, they don't have big throw cranks,
they have larger bores, shorter strokes to make 500cid
P/S
they make power in high rpms, serious #'s high flow heads
not down lower, like big throw cranks/strokers
It's truly an apples to oranges comparison
especially with usually far smaller bores 4.375"-4.5"-ish
like most these street/strip combos here
& again unless it's a 600-900+ cid mountain motor combos
they are 2 completely different styles of builds
P/S they are making 1400+ naturally aspirated HP, with short strokes
or "allegedly" 12,000hp in nitro & 14:71 Blowers at 50% overdriven
adding serious volumes of cubic air/boosts
