Re: An opinion on the 750 in comparison to 850? Magnus - Saab Vintage Models Bulletin Board - Saabnet.com
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Re: An opinion on the 750 in comparison to 850? Magnus
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Posted by magnusSE (more from magnusSE) on Sat, 22 Jan 2005 06:54:55 Share Post by Email
In Reply to: An opinion on the 750 in comparison to 850? Magnus/Pet, Larry, Fri, 21 Jan 2005 14:47:38
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The 750 is a rather nice engine. Not as powerful as the 850, but due to different carb setup (smaller throat) and heavier flywheel it has a sweeter kind of drive around town, especially at low rpms. But alas, only 33 Hp.

The triple carb 850 engine has only 2 Hp more than a single carb engine, and those three carbs can be kind of a pain to get to run right. Often the triple carb engines are highly fuel consuming. That said - if the carbs are in excellent shape the engine is nice enough. 42 Hp - 27% more than a 750.

The bullnose 850 engine is a common replacement in a SAAB93, for many reasons. The main ones being:

* directly compatible with everything. a no-brains conversion that gives you an instant quite noticeable performance gain. 5 Hp more doesn't sound like a lot but it's a 15% gain!

* the cylinder head on the 750 engine only has 8 bolts. thus they are somewhat prone to develop head gasket problems. the 12-bolt 850 head doesn't have this problem at all

* supply. 750 engines are getting kind of scarce, but there are a lot of 850s around.


I don't quite understand your reasoning otherwise. You say the 750 engine needs rebuilt - but another option is to move the crank to another block?? What exactly needs a rebuild then?? The crank is the only moving part in the engine, and the one thing to pay attention to / spend money on in one of these engines!

posted by 81.225.9...

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