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-   -   325is Turbo Project, Engine upgrades? (http://www.unitedbimmer.com/forums/showthread.php?t=9988)

BmwCrazy325 01-11-2007 05:32 PM

325is Turbo Project, Engine upgrades?
I need some help on what I should upgrade on my 325's engine?
I wouldn't be asking this, but since the 325's engine has 260,000 on a stock engine, the engine still feels very strong, but I know if I add a turbo to this engine the way it is, something is going to blow,
even with low psi.
So my question is what should I buy to get my engine worthly of a turbo? New head? new pistons? new cams?
Any help would be great, because I'm getting tired of getting beat by those v8's.
Turbo is already ordered.

xsperf 01-11-2007 06:09 PM

new rings and pistons for sure, im not sure about the little other little things, someone else will know

BmwCrazy325 01-11-2007 07:38 PM

Thanks! Now should I just go with stock pistons or upgrade to something a lil more beefy?

O and I also have the CRS, and it really sucks when having a gf! lol

witeshark 01-11-2007 07:57 PM

I would think tougher rings and maybe main crank bearings

xsperf 01-11-2007 09:54 PM


Originally Posted by BmwCrazy325
Thanks! Now should I just go with stock pistons or upgrade to something a lil more beefy?

O and I also have the CRS, and it really sucks when having a gf! lol

i wouldnt go stock, just b/c that if you are replacing them anyway, might as well upgrade because they will last longer

oh yes, and CRS disease, lol props to c1apton for that one

scrichy84 01-11-2007 11:16 PM

Sell, it and buy one with less miles. That way the suspension has more time on it along with the engine.

blacklove7777 03-20-2009 03:51 PM

my 2nd 325is
wuz good everybody purchasing my 2nd 325is last one was a 93 this ones gonna be a 95 my 93 was da shit a moment of silence for her shes gone now but for the 95 were gonna do it right and do it big project in the making if you have any ideas holla all idea are appreciated and welcomed keep the pedal to the floor!

larryglover@gulfviewllc.c 03-30-2009 06:55 PM

I'm in the process of puting a turbo on my 325i M50. I would re-build the engine with stock internals for up to 400 HP at the crank. The internals on this engine are exceptionally strong and need no upgrading. To turbo an engine, you must lower the compression to 8.9 lbs. or lower (our engines are slightly above 10 lbs). You can do this with either a thicker head gasket or lower compression pistons. If I was rebuilding the bottom end, I would problobly go with lower compressoin pistons but that will run you $1,300 or more. Your best bet is a kit, or at very least use a tuner to help you put the system together. Talk to Mike McCoy at TRM, his web site is: www.racersmarket.net.

Good luck.

ristaking 09-25-2010 10:52 AM


Mine in progress to install Twin Turbo Turbine Garret TD04 CT12 and T20 with Big Intercooler too..wish me luck okay..

Best Regards,

325LB 06-15-2011 01:15 PM

Hey everyone hows it going well this is my very own first car its a 325is coupe and ever thing on it is stock i think? but the point is im trying to upgrade the entire car but starting with the engine and i think ive been needing a new transmission what do i need to know to start or where to start?

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