should i turbo or superchager my 2003 m3

supercharger!

thats all i have to say :D

if u want to keep the warranty then i say no

if u are rich as hell and dont care for $20k on a new s54, i say go for it

If you have the cash to replace a blown S54 then by all means go for it.

If you aren't going to seriously track the car go with a supercharger, cheaper and easier install.

Vandy

If you have the cash go with the turbo. Turbos are more efficient, but your warranty is definitely void if you go this route.

I've thought of doing this, but how might a turbo be integrated with SMG transmission?

Originally posted by king56
should i turbo or superchager my 2003 m3


Who will turbo ur car? Active Autowerke? What about hp figures ?

S54 engines are too fragile and almost sqeezed out.. trying to pull out power from this specific engine isn't a good idea..

Here why don't u go like this,

-Headers
-Cylinder Head
-Valves and valve retainers
-Cams
-Intake
-ECU
-SS pipes
-Exhaust

with this setup u might hit ~400hp at the crank or flywheel.

ticking time bomb?

What company turbo charge E46 M3?
What company super charge E46 M3?

wait a year or more ...
for now grap a honda and make it into a 11sec car for under $10,000:beer:

If you want your car to run then I'd say neither. If you want a pretty $50-60K flower pot then have at it.

why supercharge the m3, it is fine how it is with its refined ride and elegance....if you truly want a car that kicks out pure hp, then the m3 is not for you

i put up a post on carpassion.com and some one has said all engine would b better just need to take out some **** from it but also i want to know if getting a s54 is better or gettin turbo or supercharge if supercharged i would get from dinan and turbo im still trying to find 1 that is good enough and i would get the euro ecu instead of american so it would make a difference so please give me more advice

well to be honest, there is not much advice to give, each of these applications you speak of are custom...Dinan's Stage III+ is their supercharger and they have not even officially released it yet, the only other option that I am aware of is RMS (www.racemarque.com) and they are notorious for faulty systems (I only speak from other people's experiences) especially on the S54 engines. Turbo applications are even more unheard of on this engine and I do not think changing the DME's from US to European version will make a difference because the problems lies with the engine inherently and the design simply cannot respond well to forced induction. Alot of work has to be put into in order to prep for FI and simply is not worth the time or the effort to most people. The S54 is an amazing engine, a free revving N/A is its true nature...to force air down its throat will simply lead to problems, plain and simple...

so mostly you guys are telling me that i should stick with all engine with no turbo or supercharger and basiclly just cahnge parts or rebuilding the engine

king can u afford a new engine?

if u cant, dont work on the current engine at all

I met a guy today that has supercharged 2 E46 M3 and says they put up to 540 HP . I told this guy that they would probably blow up sooner or later and he told me that they had been working geat. He even invited me to test drive one in ten days from today in case I want to mod. mine.

So if any one is interested I can take pictures of everything and post them

Originally posted by microboby
I met a guy today that has supercharged 2 E46 M3 and says they put up to 540 HP . I told this guy that they would probably blow up sooner or later and he told me that they had been working geat. He even invited me to test drive one in ten days from today in case I want to mod. mine.

So if any one is interested I can take pictures of everything and post them

Pictures!!!!

And Dynos!!

Then find out who the kit is from.

G-Power has a kit that does 525.

Who makes the kit? And definately post some pics!

yes i can afford a new engine but mostly they just say replace the engine parts in the car like exhaust manifold so on but i would want to put a turb o charger in the car but mostly everyone is telling me its not good to do so and also i was wondering can u drop a m5 engine on a m3 lol

why mess with such a beautiful thing, the m3 is an m3 because of its refined power, slapping a charger onto an engine that is more like a piece of ar than a machine seems more like an insult to all the m3 stands for.....if you truly want a turbo car, go for a porsche, they come with em stock :roll:

i would keep a 3rd gen m3 stock but if you have the money get a 2nd gen m3 and turbo it.

I wouldn't supercharge or turbo the m3 I did some research on this topic earlier because I was inerested in the prospect, but the engine is already very high strung with an extrememly high compresiion ratio, this would only make for a ticking time bomb. As of now this would not be a good idea, but maybe in a couple of years they will have some application that is not so risky.

I say you do neither jsut as everyone elses has said. To do turbo- or supercharge it you would need to lower the compression ratio to around 9.0:1 or maybe 9.5:1. To do this you would either need new pistons or increase the size of the combustion chamber.

You will need to do all that and run a lot of boost to make any respectable amount of power. Remember the M3 produces 333 HP because it is a high compressin engine. If you lwoer the compression, you lose power NA and to run safely after Forced Induction, you will probably still have to keep the compression ratio to that of how it used to be.

Pointless and worthless. Oh and you can't run it on pump gas either.

If you are looking for raw power, invest in a car that comes with the LS1/LS6 engines from GM. Those motors are incredible. I should know. ;) (even though the rest of the car leaves a lot to be desired)