E34 M50B25

viking325i · Post by **viking325i** » 26 Dec 2005, 06:33

Sorry for being in english guys

If someone could point me to a good online translator that'd be great

Anyway, I have a E34 M50B25, reads around 190-200psi compression across all the cylinders, so seems in good order.

How much can I boost this engine on stock internals? I'd like around 500rwhp.

Is that obtainable with just a thicker head gasket, new studs, bigger injectors, standalone ECU and lots of boost?

peppe · Post by **peppe** » 26 Dec 2005, 13:05

With a MLS gasket, ARP bolts, aftermarket ECU it sould be possible. But how long the engine will survive, dunno.

viking325i · Post by **viking325i** » 26 Dec 2005, 20:42

Would some low compression pistons improve its reliability by alot?? Is there anything else I'd need to replace on the bottom end?

Post by **Bäckis** » 27 Dec 2005, 00:44

With forged pistons and rods your all set.

viking325i · Post by **viking325i** » 27 Dec 2005, 01:28

Will the stock rods not hold up to the task?

Snurrbo · Post by **Snurrbo** » 27 Dec 2005, 02:29

viking325i wrote:Will the stock rods not hold up to the task?

Probably not to long. :wink:

viking325i · Post by **viking325i** » 27 Dec 2005, 03:04

So more or less I am looking at

New Rods
Low Compression Pistons
Head Studs
Bigger Injectors
Link Plus ECU

They should be double valve springs as stock. Will I need to swap out the valves or cams, or should I be able to hit my power goal with the above?

I had heard that the rods in the non vanos M50 were very soild and able to take alot of abuse?

http://www.bmwturbo328.com/page2.html

This guys running more or less a stock M52 and seems to be killing more drivetrain parts than engine parts.

What do you guys think?