[AT] Oliver 990

[charliehill]

You probably have Ralph and didn't know it.  They were common in tractor 
trailer trucks in the 60's and 70's.  Often called 318 Detroits or 350 
Detroits which was their HP rating.  There was a version of the 8V92 called 
a 8V92TT.  It was supercharged and had twin turbochargers (TT).  It was 
about 425 hp set up for a truck.  The RPM operating range for those engines 
was 1600 to 2450 RPM.  Being 2 stokes they were not intended to be lugged or 
run at low rpm and usually had at least a 10 speed transmission and most of 
the time a 13 or 15 speed.  Once you got used to all that shifting they were 
a lot of fun to drive.   The 13 speeds were basically a 5 speed with a 
direct drive and a low and overdrive aux. gear on the back end of the tranny 
that was shifted with an air valve so you didn't have to shift the lever as 
much as it sounds like.
----- Original Message ----- 
From: "Ralph Goff" <alfg at sasktel.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Friday, March 05, 2010 10:27 AM
Subject: Re: [AT] Oliver 990


>
> ----- Original Message ----- 
> From: "charliehill" <charliehill at embarqmail.com>
> To: "Antique tractor email discussion group" 
> <at at lists.antique-tractor.com>
> Sent: Thursday, March 04, 2010 8:51 PM
> Subject: Re: [AT] Oliver 990
>
>
>> I'd like to have a tractor with an 8V71 or 92 Detroit in it.
>>
>> Charlie
>
> I've never heard those big engines Charlie but the way this 3-71 sounded 
> was
> very impressive. The way the driver played with the throttle kept me
> guessing as to just when he actually hit full throttle. After listening to
> the old 4 and 6 cylinder vintage tractors pulling at maybe 12 to 1600 rpm
> this  2 stroke GM sounded like it was turning full speed even at idle.
>
> Ralph in Sask.
>
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