Oliver Engine Specs

I'd like to compile a spec sheet comparing engine specs for the 77, 88, Super 77, Super 88, 880, 1650, 1655, 1850, and 1855 Gasoline engines. This is something that I will post on the web for everyone to have once it is complete. My primary reason for doing this is to look at common threads and the progression of engines for these tractors through the years. I am also building an 88 motor and have found that a lot of this engine stuff overlaps. Anyway--here is the info I need (remember for all tractors above):

-Bore
-Stroke
-# of Cylinders
-Valve head diameter Intake
-Valve stem diameter Intake
-Valve length Intake
-Valve head diameter Exhaust
-Valve stem diameter Exhaust
-Valve length Exhaust
-Valve to valve centerline
-Combustion Chamber length
-Combustion Chamber width
-Main Journal Diameter
-Rod Journal Diameter
-Rod Length (CL to CL)
-Intake port diameter
-Exhaust port diameter (or LXW)
-Rate Engine speed
-Rated PTO HP
-Compression Ratio
-Piston-head clearance
-Cam Lift
-Cam duration

Any more info you guys think would be helpful can be added too. Again, I know this is a lot of info, but I will put on the web on someone�s site when complete, since I don't have one. Thanks again and dust off those Oliver shop manuals!!! Brian from Hartford, WI.

Information on "77" gasoline:

No cyl 6, bore & stroke 3-5/16" x 3 3/4", comp. ratio 6.75:1, rated speed 1600 rpm, belt hp (they didn't measure PTO hp back in those days) 38.82

For Super 77:

6 cyl, 3 1/2" x 3 3/4", comp ratio 7.3:1, speed 1600 rpm, belt hp 46.18

For 88:

6 cyl, 3 1/2" x 4", comp ratio 6.75:1, speed 1600 rpm; belt hp 44.66

For Super 88:

6 cyl, 3 3/4" x 4", comp ratio 7.3:1 speed 1600 rpm; belt hp 58.08

For 880:

6 cyl, 3 3/4" x 4"; comp ratio 7.3:1, speed 1750 rpm; belt hp 64.21

I will follow up with most the other specs. I have to check on them

This info is all for gasoline engines

Intake valves:
Stem diameter (same for all) .373"-.372"

Head diameter ("77") 1-5/16" (Super 77 & 88) 1.397"-1.390" (Super 88 & 880) 1.514"-1.507"

Length (77) 5-5/32" (S 77 & 88) 5-3/64" (S 88 & 880) 4-63/64"

Exhaust valves:
Stem diameter (same for all)

Head diameter (77) 1-1/8" (S77 & 88) 1.258"-1.251" (S88 & 880) 1.397"-1.390"

Length (77) 5-3/16" (S77 & 88) 5-5/64" (S88 & 880) 5-1/64"

Main journal diameter:
(77 & S77) 2.250"-2.249" (88, S88, 880) 2.625"-2.624"

Rod journal diameter:
(77) 2.000"-1.999" (S77 & 88) 2.250"-2.249" (S88 & 880) 2.4375"-2.4365"

Rod length:
(77 & 88) 6.75"-6.747" (S77, S88, 880) 6.75"-6.745"

Cam lift intake valves:
(77 & S77) .224" (88, S88, 880) .246"

Cam lift exhaust valves:
(77 & S77) .204" (88, S88 & 880) .248"

Of the information you requested, this is all I have, and I'm afraid that in order to get some of the info you want you're probably going to have to get hold of the engineering blueprints.

Zeus

A lot of IT manuals have this info, but I don't have any. Good luck.