[Vulcan50]

First off this isn't me planning nor suggesting that it be done. I've looked at other threads floating around but they seem to all go negative really quick, and don't really explore the topic.

So obviously the physical swap wouldn't be difficult (in the sense of an engine swap), just moving the parts like subframe and such to the M3 chassis. My first question is could the N54 be controlled with a stock module?
How would the modules talk to each other. Would the other electronics like suspension control and such work?

I drive like 30hrs a week so my mind wanders.

[Torgus]

This would be a step back. Just SC the S65. Or buy a e9X with an n54. The reason threads go negative is this is a none starter and makes no sense.

[neilvan]

It would be easier(and cheaper) to just sell the M3, buy a 335 + some M3 parts/wrecked M3.

Swapping an engine/trans/subframe and exhaust plus all the wiring,modules and coding; vs suspension,brakes,diff, muffler, seats and bumpers/sideskirts? the latter is all pretty much bolt on

[Jeef]

or m3 convert your 335i if you want the wider panels and look.

[The_E92_Fan]

Just buy a 1M 😉

[nicky dj]

You guys got it all wrong... first why would you want to do that to get a turbo car on the M3 chassis?

A project that big just turbo charge the S65! There are a couple insane builds that have done this and must say probably the best E92 I have ever seen 🔥

[Vulcan50]

Originally Posted by The_E92_Fan

Just buy a 1M 😉

Aren't 1Ms stupid expensive?

[Vulcan50]

I guess my thought is that if you put on some stg2 turbos on an N54 and put it in the e9X M3 it would be like the F8X but have the e9X beauty. There's enough clean chassis that have toasted S65, that it would be a neat swap

[Vivek.]

Originally Posted by The_E92_Fan

Just buy a 1M 😉

OP could build an n54 swapped m3 and then buy another m3 because he regretted it and it'd still be cheaper than a 1M

[Rob1285]

Originally Posted by Vivek.

OP could build an n54 swapped m3 and then buy another m3 because he regretted it and it'd still be cheaper than a 1M

QFT.

I had an acquaintance who wanted to do the N54 in an M3 just to troll or whatever, and after he did the math it would be cheaper to just do a full M3 swap of all the suspension and control bits than it would to put all the stuff from an N54 into an M3.

If you want FI in an M3, you are better off just SCing it than swapping an N54 into it.

[Torgus]

Originally Posted by Rob1285

QFT.

I had an acquaintance who wanted to do the N54 in an M3 just to troll or whatever, and after he did the math it would be cheaper to just do a full M3 swap of all the suspension and control bits than it would to put all the stuff from an N54 into an M3.

If you want FI in an M3, you are better off just SCing it than swapping an N54 into it.

Yup.

You can handle better than a stock m3 if you want to with an n54 e9X. Upgrade to all m3 arms, solid bushings, fully ball jointed suspension, m3 rear coilovers to fit the m3 rear arms etc. I know, because this is my exact suspension set up: https://www.e90post.com/forums/showt...5#post25439025

I would still take a SC'd DCT S65 for a track car over anything n54 powered any day of the week. But that is another discussion.

[B6T]

Major point being missed here... E9x M3 has a unique body. The body work and parts alone make a huge difference in the cost between N54 swapping an M3 or just upgrading a 335 to match M3 specs and appearance.

I'd rather have factory body work than have some guy bondo M3 rear quarters onto my 335. Practically every body part is unique on the M, and they aren't cheap to buy individually because people typically "know what they have".

So I'd rather N54 swap an M3.

[Rob1285]

Originally Posted by B6T

Major point being missed here... E9x M3 has a unique body. The body work and parts alone make a huge difference in the cost between N54 swapping an M3 or just upgrading a 335 to match M3 specs and appearance.

I'd rather have factory body work than have some guy bondo M3 rear quarters onto my 335. Practically every body part is unique on the M, and they aren't cheap to buy individually because people typically "know what they have".

So I'd rather N54 swap an M3.

I'm pretty sure a quality body shop could do the M3 fenders on a 335i for cheaper than the swap still...but I've also been told by my friends who do body and paint work it isn't as cheap as I think it is.

That being said with how cheap E92s are getting these days, if you just wanted the E92 M3 look I'd buy an E92 M3. Unless you are somewhere where having a V8 like that is prohibitively expensive.

[B6T]

My point is that it's more than just rear fenders though. Front bumper, headlights, hood and fenders, rear bumper, trunk lid, mirrors, window trim and so on... all unique or most likely different than on a 335.

I cringe when I see that wire harness clips on my car have been removed and reinstalled and aren't factory original. The fact that some dude bondo'd fenders on would literally keep me up at night.

As far as I'm concerned, I'd rather have a M3 body even if it were a price premium.

[Rob1285]

Originally Posted by B6T

My point is that it's more than just rear fenders though. Front bumper, headlights, hood and fenders, rear bumper, trunk lid, mirrors, window trim and so on... all unique or most likely different than on a 335.

I cringe when I see that wire harness clips on my car have been removed and reinstalled and aren't factory original. The fact that some dude bondo'd fenders on would literally keep me up at night.

As far as I'm concerned, I'd rather have a M3 body even if it were a price premium.

Everyone has their thing. I do kinda wish my 335is was a little more aggressive in the body, so I get it. I just don't know that the cost would be worth it. But its just money and you can't take it with you when you die.

[Torgus]

Originally Posted by B6T

So I'd rather N54 swap an M3.

So go do it and piss away your money. The S65 supercharged or TT with a DCT is a superior engine for the street, track, etc.

Unless you want above 800whp for bragging rights, then go build an n54 for 20k.

Also, you can just buy a widebody for your N54 a fit wider tires than a stock m3 can fit. The difference in body size 335i vs m3 E9x is minimal.

[Saif2018]

Originally Posted by Torgus

So go do it and piss away your money. The S65 supercharged or TT with a DCT is a superior engine for the street, track, etc.

Unless you want above 800whp for bragging rights, then go build an n54 for 20k.

Also, you can just buy a widebody for your N54 a fit wider tires than a stock m3 can fit. The difference in body size 335i vs m3 E9x is minimal.

Should just fully forge the S65 and supercharge it.

I Don't see end point in putting a N54 into a M3, either.

[nicky dj]

Originally Posted by Saif2018

Should just fully forge the S65 and supercharge it.

I Don't see end point in putting a N54 into a M3, either.

Supercharging is common on the S65 Supercharged your still limited by the crank 550-600 max. Turbo guys are pushing 800+ on the M3 chassis.

If the goal is to spend money trying to push turbo power and be different, then be really different and have 1 out a handful.

[Vulcan50]

It seems to me that the beauty of the N54 is the low end torque. Which to me is the best because rarely can I redline the car (at least outside of 1st gear)

My thought is that you could find an m3 for "cheap" with a bad motor, and an N54 car for cheap.

[Saif2018]

Originally Posted by nicky dj

Supercharging is common on the S65 Supercharged your still limited by the crank 550-600 max. Turbo guys are pushing 800+ on the M3 chassis.

If the goal is to spend money trying to push turbo power and be different, then be really different and have 1 out a handful.

I was referring to Fully Forging the S65 engine and then Super charging.

Using a stock block, yes your probably right,

A fully built S65 has 550-600 max hp at crank?

[nicky dj]

Originally Posted by Saif2018

I was referring to Fully Forging the S65 engine and then Super charging.

Using a stock block, yes your probably right,

A fully built S65 has 550-600 max hp at crank?

A supercharger relying on the crankshaft to produce forced induction. While you can get 600 possibly 700hp to the wheels, the torque is still relatively lower at maybe 550 max. You'd have to google the numbers of some builds.

Turbos rely on themselves via the exhaust gas to produce the forced induction. The bigger the turbos the more you can crank out, hence the turbo wars you see now between car manufacturers. Not low end horsepower but overall torque.

[KnighTT]

OP - The truth is, I know exactly what you mean. When you look at the E92 M3, it is hard to deny that the little extra aggressive body styling set it apart from the 335i. That little extra flare in the back makes a world of difference. Plus, there is about 0 can do to just pop that look on a 335i without $$$$$ in body work.

I had the same thought. Find an empty M3 body for cheap and just swap everything from my complete 335i into it. Now, it is NOT that easy, but I figured at the end you'd have the look and you'd get the N54 at the end of the day. For me, I would also be putting the 335xi AWD drivetrain in which I have no clue if the xi subframe would bolt on.

Anyways... I think at the end of the day this would be easier. Fitment Labs makes a overfender kit that gives you the M3 flares look without that overfender Rocket Bunny look.

https://www.e90post.com/forums/showthread.php?t=1748190