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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Olivers with GM engines

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Ryan W

01-29-2005 11:55:08




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Iwas wondering which models had detroits in them? Also if they 4-53 or 4-71? I have parts for both wanting to put A puller together. Thank-you




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Andrew

01-29-2005 15:50:42




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 Re: Olivers with GM engines in reply to Ryan W, 01-29-2005 11:55:08  
Cockshutt/Oliver 1900 and 1950 had 4-53 the 1900"s has figure 8 Sleeves where 16:1 or 17:1 but then you have HV or LV (HV5)injectors that slobber and do not atomize the fuel properly. The 1900"s also had 2valve head witch ran slower (2350rpm). Then the 1950"s came out They used 4valve head N50 or S series injectors (S45 or S55"s most common) They camed the 4valve head was also cammed up with a "GT Cam" from dtroit diesel high lift to open valves more timing was advanced to hold htem open longer. 1950"s had 21:1 compression and where governed at 2800rpm. guys would soup them up and open them to 3000rpm.. Before the 1900 came out Oliver had the Super 99 great tractor strong and very rugged with very nice body design the 99 had a 3-71N with the figure 8 sleeves 18:1 compression (HV6) 2 valve head. Then guys wanted more power by that they used N sleeve and piston N65"s, Gt Cam, 4valve head then the 990 came out with all the goodies. the 995 was souped up even more power by openin the gov to 2600rpm....

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tom upton

01-31-2005 19:57:23




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 Re: Olivers with GM engines in reply to Andrew, 01-29-2005 15:50:42  
Not to be picky or anything but my manual says 17:1 for the whole series of 1900's as well as the 1950. I tend to believe this as horsepower rating did not increase signifigantly from the C series 1900 to the 1950. I am not sure when change to 4 valve head happened but I have always assumed sometime during B series or early C as my C had the 4 valve head. High idle for 1900A=2125 B and C = 2375 1950=2575 (according to service manual?)Detroit makes several cams for 453 but I am pretty sure there was never one with GT stamped on it? The one in mine is a V7 which is described in detroit manual as a high lift low velocity. I doubt that timing would be advanced in the 1950 either? and I dont believe that would change how long valve is held open , it just opens sooner in the cycle, maybe you are thinking of timing hieght of injector? I am not sure what figure 8 sleeves are? Or HV5 injectors? I do know that when you "freshen up" your old oliver and put in an N kit and some N70 injectors it sure wakes it up!!!

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J. Schwiebert

02-01-2005 04:18:57




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 Re: Olivers with GM engines in reply to tom upton, 01-31-2005 19:57:23  
The four valve head and N series sleeves and pistons were introduced with the B series in the fall of 1962. I remember figure 8 ports and HV injectors from old 71 series.



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tom upton

02-01-2005 16:52:28




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 Re: Olivers with GM engines in reply to J. Schwiebert, 02-01-2005 04:18:57  
What does the figure 8 sleeve refer to? Is this the pattern of the ports in the liner? We thought about raising the top of the ports in our 453 when we rebuilt, but figured it might turn out to be a "expensive experiment" We are presently contemplating putting a turbo on our 1900 and trying to pull against some local 1066 binders, D21's etc., in what we in canada call "modified stock" Not too sure whether it will be worth the effort as some of these guys are pushing 300 H.P.I am pretty sure it would be hard to get any where near this out of a 453? What do you think? In one way I would like to leave tractor the way it is but there are only couple of heavy stock classes to pull in every year. we dont get much of a chance to work the old girl on the farm as it is too big for most of the chores on our small farm.So we are left looking at it sitting in the shed most of the time. I would appreciate any fellow oliver/gm lovers input as to what I would need to do to make 1900 into a competitive puller or is it even worth while??

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A.P.

01-30-2005 00:28:37




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 Re: Olivers with GM engines in reply to Andrew, 01-29-2005 15:50:42  
The B and C series of the 1900 came with the four valve head. The earlier A series came with the two valve head.

The Super 99, 990 and 995 all came with the two valve head, early style (not N series) injectors and the earlier style pistons and sleeves. Many have been overhauled with the higher compression late model piston/sleeve combination and have N series injectors. Some even have the four valve head added.

Oliver also built the Massey 98, which is an Oliver 990 with a different hood and grill.

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Andrew

01-30-2005 09:43:45




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 Re: Olivers with GM engines in reply to A.P., 01-30-2005 00:28:37  
i forgot about the A,B,C series. i thought the 990 995 had 4 valve head. not every book is right.



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J. Schwiebert

01-30-2005 16:03:43




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 Re: Olivers with GM engines in reply to Andrew, 01-30-2005 09:43:45  
Andrew: Send me an e-mail.



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Andrew

01-30-2005 19:33:23




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 Re: Olivers with GM engines in reply to J. Schwiebert, 01-30-2005 16:03:43  
whats you email??



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A.P.

01-30-2005 13:33:46




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 Re: Olivers with GM engines in reply to Andrew, 01-30-2005 09:43:45  
The 990 and 995 did not come stock on the tractor. But if you are talking tractor pulling, then of course it was stock ;^) Just like the 9 speed Farmalls, Power block Deere's, 301 460/560's, etc.



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