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The BMW 3 Series (E30) Forum
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BMW 3 Series (E30)
Automaker: BMW
Model: 3 Series (E30)
Years:
Topic: Automotive Forums, BMW
Related Forums & Links: Old archives; The E30 Off-Topic Forum: E30 Lounge
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Mod-O-Matic (beta!): Please vote with care. You must be logged in to use Mod-O-Matic Move post to: For Sale | Group Buy | Off Topic | NWS/Adult    Remove due to Spam/Troll | Prohibited       Highlight as: Informative | Success Story
 
Author:  
butlertron on 2008-05-24 at 12:32:18(Roadfly member #124000; Roadfly Inner Circle member since 2006-01-07) 
    
Subject:  
250 is just getting started. (132 views) 
Message: That is FAR from what you can really do with a stock internal turbo M20. Regardless of what you'll hear from the villiage idiots.

The only reason I would consider an M50 is for those sweet-[Oops!] 4 valve combustion chambers. 9:1 CR on that engine would be more resistant to detonation than 8:1 on an M20/M30. The two valve chambers are not ideal, and that is an inherent limitation at the highest fringes of power output.

A higher compression ratio would get better mileage, quicker spool, a lower boost threshold and more power. Its a tempting swap, and I'll probably end up doing it it I cant get 120 mph traps out of my 2.7i M20.
1988 528e- 299rwhp/360rwtq
1983 528e- stock 2.7e motor, 4hp22 from an '86
1985 528e - RIP
1984 533i - RIP		 
 

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