R3 Advantage!

[mfg]

I believe there's one major internal mechanical advantage..... (improvement).... Studebaker R3 and R4 engines have over all the other Studebaker V-8's....(including the R1's & 2's).....

Can anyone out there think of what that would be?..........(Not speaking of larger ports or valves)

 

[silverstude]

no vacuum advance

[Dwight FitzSimons]

Looser clearances reduce friction. Higher capacity oil pan provides more oil to help cool the engine.  Higher lift cam(s). 

--Dwight

[mfg]

1 hour ago, silverstude said:

no vacuum advance

True,....but that's not what I was thinking.

[mfg]

27 minutes ago, Dwight FitzSimons said:

Looser clearances reduce friction. Higher capacity oil pan provides more oil to help cool the engine.  Higher lift cam(s). 

--Dwight

All true,...however, I was thinking there's a real important difference inside!

[64studeavanti]

R3 and R4 had Howard's rods with floating pins and forged pistons.

[mfg]

Just now, 64studeavanti said:

R3 and R4 had Howard's rods with floating pins and forged pistons.

Floating pins....floating pins.....floating pins....EXACTLY!

[brad]

R3 and R4 engines did not have "Howards" rods. They were the same as regular R1-R2 rods with one important difference...they did not have a hole drilled in it for a pinch bolt. That's it. They were also shot peened. 

[mfg]

Yes, for normal driving there's nothing wrong with the conventional rods.....

But for high RPM use, I can see how those wrist pin lock bolts & nuts, plus the drilled hole itself, might be a real liability!