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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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Old 01-08-2005, 02:48 PM   #1 (permalink)
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if i get an 318i with the M40 engine now, will it be possible to convert it to a M20 325i engine l8r on? and no i cant just get an 325i now because it would waste too much gas compared to the 318i nd i cant afford that!

if possible what else would i have to change?

thnx...
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Old 01-15-2005, 04:18 AM   #2 (permalink)
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ok...c'mon guys, some1 must knw smtin about this!!!!
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Old 01-16-2005, 01:22 PM   #3 (permalink)
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I think you mean M42.

It is possible - you'd need to change your trans. & driveshaft, as well as a few other items.
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Old 01-16-2005, 09:42 PM   #4 (permalink)
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m20 is a 2.5 liter from a 325i and it will get same economy as ... if you just outright bought a 325.

if thats what you are asking.... and the price of it will be greater than the car's cost.
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Old 01-17-2005, 11:49 AM   #5 (permalink)
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E30, its all the same body, so you can do pretty much any engine conversion, even up to the 750i 12cyl, but that is pretty much close to impossibly, only one person has done it.

But yes, you can conv to the i6. and yes, it will be faster, the M20 was supposed to be the more economical engine hence the single cam, the M42 was supposeed to be the more 'race' engien hence the dual overhead cam.

So in a nutshell, it is possible to do the conversion, people do it all the time.
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Old 01-17-2005, 03:38 PM   #6 (permalink)
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Quote:
Originally posted by detour54@Jan 16 2005, 02:22 PM
I think you mean M42.
[snapback]272636[/snapback]
Unless you are from outside the US, where the M40 - the single cam version of the M42, is available.
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Old 01-17-2005, 07:06 PM   #7 (permalink)
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Quote:
Originally posted by spiff325is@Jan 17 2005, 01:49 PM
E30, its all the same body, so you can do pretty much any engine conversion, even up to the 750i 12cyl, but that is pretty much close to impossibly, only one person has done it.

But yes, you can conv to the i6. and yes, it will be faster, the M20 was supposed to be the more economical engine hence the single cam, the M42 was supposeed to be the more 'race' engien hence the dual overhead cam.

So in a nutshell, it is possible to do the conversion, people do it all the time.
[snapback]273259[/snapback]
Someone actually swapped a V12 into a E30 ? Damn. The biggest engine I've seen/heard of in a E30 is a V8... it was a 340is.
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Old 01-17-2005, 08:20 PM   #8 (permalink)
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Quote:
Originally posted by Torque+Jan 17 2005, 08:06 PM--><div class='quotetop'>QUOTE(Torque @ Jan 17 2005, 08:06 PM)</div><div class='quotemain'><!--QuoteBegin-spiff325is@Jan 17 2005, 01:49 PM
E30, its all the same body, so you can do pretty much any engine conversion, even up to the 750i 12cyl, but that is pretty much close to impossibly, only one person has done it.

But yes, you can conv to the i6. and yes, it will be faster, the M20 was supposed to be the more economical engine hence the single cam, the M42 was supposeed to be the more 'race' engien hence the dual overhead cam.

So in a nutshell, it is possible to do the conversion, people do it all the time.
[snapback]273259[/snapback]
Someone actually swapped a V12 into a E30 ? Damn. The biggest engine I've seen/heard of in a E30 is a V8... it was a 340is.
[snapback]273634[/snapback]
[/b][/quote]

They sure did.

info - http://www.bmw-power.de/Fahrzeuge/E30_350i..._uebersicht.htm

pics - http://www.bmw-power.de/Fahrzeuge/E30_350i..._uebersicht.htm
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Old 01-18-2005, 02:05 PM   #9 (permalink)
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well dont you worry about that, ill out do the 750 engine as soon as i find a cheap rolling chassis, i have a chevy 350 bored .30 over, which will make it a 355 and also will make the car a 358 thats correct a 5.8 liter, it will also have arround 400-500 hp and then im going to cage it, and drive it arround and race crappy hondas id switch it to a bmw engine, but those are soo bloody expensive! anyways thats my to cents
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Old 01-18-2005, 09:36 PM   #10 (permalink)
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i ment wht i said, M40 to M20!

the 318i has the M40 and the 318is has the M42 nd im not planning to get an 'is' because its too hard to get them in NZ nd as gettin any bmw here manual is nx to impossible so trying to find a "is" tht is manual would b like lookin 4 a needle in a haystack...

thnx 4 replyin guys...
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