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With one caveat, making it a daily driver.... (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Patrick Buthmann on December 21, 1999 at 23:14:53:

In Reply to: 400hp NO PROBLEM!! posted by Richard M on December 21, 1999 at 16:03:01:

: 400hp from a 3 litre turbo engine is no problem. My twin turbo '89 535i Sport was putting out close
: to 550hp but I wanted more so I have decided to rebuild the engine (lower cr, bigger injectors, custom con rods, pistons and some other things)
: hope to get close to 700hp when I finshed.
: Some facts:
: 1988 Ford Cosworth 2 litre 4 pot turbo 205hp standard, can be tuned to over 600hp No problem
: 1980's F1 turbo cars 1.5 litres 1000-1500hp Size does not matter.
: 1998 Nissan Skyline GT-R 2.5 liter twin turbo 280hp standard, can be tuned to 1000hp+
: Richard M
: '89 535i Sport

That Ford Cosworth engine is a sweet-heart of an engine. Always will be.

However, when we digress into F1 turbo engines, we're talking about limited use, highly specialized engines of extremely short lifespan. Most F1 engines are replaced after every race, so the old 1.5 L 1000 HP engines (turbo'd) might have impressive HP to displacement numbers, it's not a *practical* street engine.

We're also talking about high-revving, drive it *like you stole it* engines. Little bottom end torque for around the city, stop and go traffic.

However, 400 HP is very realistically achievable (even with factory parts!), and as Richard points out, 500 HP is achievable depending upon the engine being built on, and how much money you're willing to spend. 500 HP is still a very streetable car too, and carefully run, could last 100,000 miles as well.

The *supposedly* impossible limits of yesteryear are not as prevalent as they used to be. Modern technology, particularly in materials, can be the difference between a long-life, high HP engine, and one that blows up weekly.

Pat


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