Date: Tue, 11 May 1999 07:29:36 -0400 From: "Eric Law" <elawnopsamexxx.com> Subject: Re: Engine Developement History
Douglas, When the 99 was introduced (1968?), it had a 1.7-liter Triumph motor - same motor as in the TR-7 (and some other Triumph models, I think). At some point, I think during the 1970 model run, they switched to a 1.85-liter variant of the same motor. This motor had a lot of problems, especially related to the cylinder head. In the '72 model, Saab introduced a 2.0-liter motor of thier own design, actually manufactured by the Scania truck division. This later came to be referred to as the "B" motor. It was loosely based on the Triumph motor - same bore centers, bearing sizes, and a few other things. But most other things were dramatically improved, the thing was bulletproof. Pretty heavy, too! This motor was used in 99 and 900 models up to 1980 with very few changes. The "turbo" option was added in '78, but it was still the same motor underneath. For the 1981 model year, the "B" engine went on a weight-loss program, and became the "H" engine. Still fundamentally the same, but a lot of details were changed. Most significant was the elimination of the "countershaft" that drove the distributor, oil pump, and water pump. If I recall correctly, the changes made it about 150 lbs. lighter than the B motor. In 1985, the 16-valve variant appeared, and the naming scheme changed. The 8-valve motor was called the "B201", and the 16-valve was called the "B202". Both had pretty much the same block as the previous motor, but the 16-valve naturaly had a very different cylinder head. Also, the B202 was Saab's first with hydraulic valve lifters. In 1990(?) the 2.3-liter motor, a.k.a. "B234" appeared. This one's still an in-line four, but has a different block layout, increased stroke, and balance shafts. Plus about 1/2-a-million detail changes. I beleive also this is the first in the series that's not "bolt-compatible" with the Triumph motor. If you want the story in even more detail, check out "From two-stroke to turbo" or "The Saab-Scania story" books - they're both fascinating! Eric Law Douglas Balderson <dbaldersonagricnopsamial.co.uk> wrote in message news:3736ffea.0nopsama.ukisp.net... > PLEASE HELP ! > > I am looking for information on the develpement of the engines that were put > int the 99 / 900. I believe that they were developed from the Triumph 1850 / > 2000 16V unit. > If anybody has any information relating to this please could they let me > know > > Thanks alot > > J_Baldersonnopsamail.com > >
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