Carbs and rebuild - BMW Forum -

3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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post #1 of 2 (permalink) Old 12-31-2003, 08:04 AM Thread Starter
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Hey hey,
I'm looking for a pair of webber 45 or 40 DCOEs side drafts.
Any one have any expierence with sidedrafts on an e21?
I have a 78 e21 with 2 liter and a 83 e21 with the 1.8.
Would it be ideal to go with 2.0 or the 1.8 or mismatch or... Please tell me the best combination. or even a different motor/block/head...??
I'd like to build a torquey e21, 180hp at wheels, carbs.
So far I've been working on the suspesion.
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post #2 of 2 (permalink) Old 12-31-2003, 08:43 PM
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Hmm, taking off fuel injection and using carburetors is kind of backwards.

Most people recommending this have never balanced a set of carburetors.

The Fuel injection is not limiting point on a M10 engine.

Use the 2 liter and get a high lift cam, a cenfugal distributor, and a header.

To get the most out of the power available, get a 3.91 to 1 differential.

To counter this lower gearing, install a 5 speed with an overdrive 5th gear.

I do not think on a low compression engine, less the 10 to 1 you will get a hp number over 160.


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