Max displacement for Stude V8??

[RadioRoy]

The engines which were first-generation OHV8 design contemporaries of the Studebaker and their maximum production displacement:
Cadillac - 390"
Oldsmobile - 394"
Chrysler - 392"

See a pattern there?

jack vines

Jack, what were the displacements the first year they came out? Were they significantly larger than 232?

[DEEPNHOCK]

"Digger" Dave Molnar sonic tested the block he chose..

When the 289" is bored .060", the displacement is 298.885". That was how the prototype R3s were created. The production R3s were overbored .093" for 304.5", so, if we're beginning with a 3.656" bore +.060", we're up to 3.716" bore for 314.5". That will require sonic testing. Many full-flow blocks won't take that much overbore.
jack vines

[PackardV8]

Jack, what were the displacements the first year they came out? Were they significantly larger than 232?

'49 Cadillac - 331" grew to 390" by '59
'49 Oldsmobile - 303" grew to 394" by '59
'51 Chrysler - 331" grew to 392" by '57

So yes, the Studebaker V8 started small and stayed small.

jack vines

[RadioRoy]

Another one of those "What were they thinking?" moments.

Oops. I answered that in my first post.

[Dan Timberlake]

I think the Chrysler hemi got a .5" taller block deck along the way to help incorporate the 392's .28" longer stroke.

[PackardV8]

I think the Chrysler hemi got a .5" taller block deck along the way to help incorporate the 392's .28" longer stroke.

Yes, for true; Cadillac went to 390" in 1959, but by 1963 the stylists wanted a lower hoodline, so the engineers shortened their block deck a full 1" and kept the same 390", so displacement is a matter of how much money the factory wants to spend on foundry cores and machining center changes.

jack vines

[Jeffry Cassel]

What Mike said!!!! The cylinder wall is thick but not infinitely so. .080 is the max. My Packard needed to be bored and they went .040 which increases displ to 296cid. I think their 304 was .080 over. The Stude V8 is square (bore essentially equal to stroke) If you were to increase displ. you'd need to mess with the stroke and you'd end up with an under square engine. Guess free advice is worth what you pay for it. formula: pi x 1/2 bore squared x stroke x number of cylinders = cid

[PackardV8]

The following are offered only in the interest of accuracy.
When we routinely work to .0005", giving and getting the dimensions is crucial.

The cylinder wall is thick but not infinitely so. .080 is the max.

Yes, agree, there are limits, however, where they are is unknowable without professional sonic testing and sometimes that's not enough. Even after sonic testing, we once hit an internal rust pit hole at .060". More than .080" is not usually a problem, but it can be there.

On the other hand, we regularly bore pre-full-flow blocks .117", for 308".

I think their 304 was .080 over.

No, the 304.5" is overbored .09375"

The Stude V8 is square (bore essentially equal to stroke)

The key word "essentially"; only when bored .060", does the 299" becomes square at 3.625"

jack vines

[gordr]

Regarding the pre-full flow blocks, is it possible to drill and/or otherwise modify one of those to accept a full-flow filter, possibly remote-mounted? I know I was able to do that with an early OHV six.

[PackardV8]

Regarding the pre-full flow blocks, is it possible to drill and/or otherwise modify one of those to accept a full-flow filter, possibly remote-mounted? I know I was able to do that with an early OHV six.

Yes, Gord, it's been done several times and someone may be able to provide you a link to the instructions.

JMHO, but when beginning with a freshly cleaned and rebuilt engine, especially those with a closed PCV system, there's very little advantage to a full-flow filter system.

Mike and I will probably have our debate again here. On pre-full-flow builds, where they're not being converted to full-flow, I find definite advantages to retaining the partial-flow/bypass filter system and he doesn't.

jack vines

[swvalcon]

Jack what can the cubic inch be stretched to with different pin height pistons and off set grinding of the crank and different rods or what ever it takes?

[PackardV8]

Jack what can the cubic inch be stretched to with different pin height pistons and off set grinding of the crank and different rods or what ever it takes?

Largest I've ever heard of was 340"; that's with a 3.68" bore and a 4" stroke. The durability at high horsepower stress is unknown, but should make for a torquer of a street engine.

jack vines

[gordr]

Thanks. yeah, doing that would not be high on my list of priorities, now.

[64V-K7]

Regarding the pre-full flow blocks, is it possible to drill and/or otherwise modify one of those to accept a full-flow filter, possibly remote-mounted? I know I was able to do that with an early OHV six.

Here are a few notes

http://www.studebaker-info.org/rjtechdec2017p2g.html#Fullflow

[mbstude]

Jim McCuan was putting together a stroked, overbored Stude V8 which he claimed came out to 363”. As far as I know it has never ran, though.