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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E21 (1975 - 1983)

E21 (1975 - 1983)

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  #1  
Old 07-19-2012, 07:29 PM
boostaddict21 boostaddict21 is offline
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Location: surrey,bc
 
Join Date: Jul 2012
Posts: 5
Mein Auto: 1987 BMW 325
turbo e21 possible

I was going to get an e30 but It all didn't pan out so im looking at a e21 right now. My question is, I want more power, what would be the best ,engine swap or turbo it? I have about a 5000 grand budget. Ive searched but couldn't find anything
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  #2  
Old 08-15-2012, 11:08 AM
Xerxes Xerxes is offline
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Location: Tacoma Wa
 
Join Date: Nov 2010
Posts: 24
Mein Auto: 81 323i and 93 525i
I'm assuming you have the 320i (4 cylander) motor, you might want to look at the m44 motor, it was used in the e36 318i. They produced 142hp and you don't have to do any major modifications (I haven't done this so I'm speaking theoretically) to put that motor in, the other option would be the s13 motor out of an e30 m3, 192hp but much harder to put your hands on, and may blow your budget just for a good motor. You can also look up performance upgrades for the m44 motor, being newer and far more common, there are undoubtedly upgrades available.
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Old 08-15-2012, 06:43 PM
Xerxes Xerxes is offline
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Location: Tacoma Wa
 
Join Date: Nov 2010
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Mein Auto: 81 323i and 93 525i
Upon looking at the m44 engine (in my 318ti) and looking at the old 245 getrag transmission I still have, you would have to use an e36 transmission as well. This causes problems for your speedometer, because there is no cable drive from the e36 transmission. You could modify the rear subframe and put in an e30 rear end and change out your instrument cluster but now we are talking a lot of custom fabrication and work.
The m3 motor is based on the m10 block so it should bolt right up. Electronics is another matter, but any engine update will require that.
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