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Old 03-28-2010, 09:08 PM   #1 (permalink)
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Best n/a 2.5L build possible?

Hey everyone,

Just joined this. Im looking for the best possible n/a 2.5L build for a race engine. Cant decide if i should go with the m50/tu or m52/tu. Looking for a sustainable high revving engine (anywhere above 7k is good though). Any advice is extremely welcome. Im hoping to put it in a completely custom built frame for a track toy. Thanks again.

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Old 03-28-2010, 09:35 PM   #2 (permalink)
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Go with the M50. It is OBDI and thus easier to mess with the software. I hear that the non-vanos has certain advantages as far as getting more performance out of it goes. I don't know if the stock internals can sustain 7k rpm for extended time -- that is above the stock redline.

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Old 03-28-2010, 09:49 PM   #3 (permalink)
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Ah thanks a lot! Hadn't even considered that the m52 is OBDII. I've been looking for cams for the engine and almost all of them seem to be for the 2.8... The only schrick cam i could find for the m50b25 was a 256/244 Degree. I dont have any idea how much of a difference that is from stock, but im looking for something even higher. Any advice?
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Old 03-29-2010, 06:59 AM   #4 (permalink)
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i saw a M52B28 OBD-I near 300hp n/a, its for sale at the moment, fresh rebuild
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