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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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#1 (permalink) Old 07-30-2010, 03:02 PM
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Lightbulb Boost?

I have 85 325e and I am wondering what I would need to do to the motor so it could be boosted. I only want to run like 8-10 pounds. Thanks in advance for the advice.

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#2 (permalink) Old 07-31-2010, 05:36 PM
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Pretty much nothing, just maybe a rebuild. All new gaskets, main rod bearings, new rings, etc. With that low boost you'll be fine on stock internals. Also depends what route you choose, supercharger or turbo. Search around for builds and what not.


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#3 (permalink) Old 08-03-2010, 12:18 PM
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I tried looking up a supercharger kit and cant find them anywhere. any sites you would recommend?

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#4 (permalink) Old 08-03-2010, 02:44 PM
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not to be a dick but isn't this the car you have for sale? And if you have it for sale and need money why are you trying to dump more money into an already overpriced car?

BTW, $4k, rediculous. Clean m50 swaps go for $3.5k

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#5 (permalink) Old 08-03-2010, 05:11 PM
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I tried looking up a supercharger kit and cant find them anywhere. any sites you would recommend?
There aren't a lot of choices when it comes to supercharger systems for the M20 motor on the E30. Lowen Designs builds a bolt on kit for the E30 and supposedly it fits all M20 blocks.

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#6 (permalink) Old 08-03-2010, 07:08 PM
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You'll spend 3-5k turboing it, I guarantee it. I'm over 3k in so far on mine and this is my 2nd one I'm building, so I knew ahead of time what to get and what I was getting into. Plus there is tuning it, which there are no plug and play solutions for. I've been working on fuel and spark maps for the last week, which can add 100's to the cost of the kit if you cannot do it yourself.

The lowen design supercharger kit uses a RRFPR for fuel compensation, no actual tuning is included.

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#7 (permalink) Old 08-09-2010, 06:54 PM
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swap motor

take it from a guy who has had a boosted BMW for 4 years. its costly, and i'm talking about things breaking and maintainace. i'm currently out of commision because i need a new tune on my standalone but i normally run 8lb low boost and 17lb high

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