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View Full Version : Best way to make 300hp out of a m52?


Tyman
10-18-2012, 12:37 PM
I hoping in the near future to be making 300 hp out of my m52 and was wonder what the best ways or cheaper ways to get that kinda of hp, or if its easier and cheaper for me just to swap in a s52

Bullet Ride
10-18-2012, 01:35 PM
There's a number of ways that you can achieve that number, but the way to go will depend on what it is you plan on doing with the 300hp. That being said, short of a cheap nitrous kit, any way you cut it it will cost you thousands to make a reliable 300hp from an M52. An S52 (US) will still need some pretty serious mods to get 300hp as well.

Tyman
10-18-2012, 01:40 PM
daily driver/weekend car mostly, and maybe go out to a couple of track days

GeMc
10-18-2012, 01:42 PM
An (aftercooled) supercharger kit running 8psi will get you 300whp on a strong M52 motor. You can buy them used cheap out of the U.S. Nitrous is the cheapest way to get that power, just make sure you get it installed professionally with all the proper safety measures (tuning, plugs, variable controller, fuel etc).

T.Dot_E30
10-18-2012, 01:46 PM
300rwhp ain't happening without forced induction, but you know that right?
Even getting close to that will take several thousands into an engine build.

Usually FI mods aren't known for reliability.

Tyman
10-18-2012, 01:53 PM
no you can have an n/a motor with 300 hp, just didnt know what it would cost, and how much could i get a supercharger for?

GeMc
10-18-2012, 02:10 PM
You think you can make 300whp without a power adder on an M52 2.8L motor? Um, sure. It'll cost you about $30,000 and last for a few hours running 110oct, stand alone, 12+:1 compression with ITBs and radical cams with VANOS delete. You'd essentially have to build your own Eurospec S50 motor out of a 328i. Like Trevor said, aint going to happen. You can get a used blower kit from a U.S. forum for probably $4g

Bullet Ride
10-18-2012, 02:12 PM
Unless your car is in super clean condition you'd be better off to sell it and pick up a clean M3 than to spend the time and money to do an S52 swap.

Tyman
10-18-2012, 02:37 PM
its in an e30 btw, i want to keep my car, so should i just get an s52 instead of a super charger bcuz ive seen s52's go for 2000-3000$

GeMc
10-18-2012, 02:57 PM
Sure, but you'll pay half the price (of a used S/C) to get HALF the horsepower you're looking for. You're call really.

Bullet Ride
10-18-2012, 03:05 PM
FWIW....

http://www.maxbimmer.com/forums/showthread.php?t=153849

Tyman
10-18-2012, 03:17 PM
hmm i actually like the look of that but honestly how long do you think that turbo will last, im kinda new to cars but know used turbos arnt the best investment

GeMc
10-18-2012, 03:44 PM
Sounds like a good deal. Even if the Turbo blows prematurely, you can easily get it rebuilt, or buy another one. At least you still have all the other accessories.

Bullet Ride
10-18-2012, 04:25 PM
hmm i actually like the look of that but honestly how long do you think that turbo will last, im kinda new to cars but know used turbos arnt the best investment

Based on the picture it doesn't look like the turbo has had much use. As long as there's no shaft play, chances are it's in good shape and will last quite some time if you treat it well.

SamE30e
10-18-2012, 04:44 PM
It's an ebay turbo kit. It's cheaper then that new..

You could get close 300hp out of an M52. You'd have to build the engine pretty serious, but not as extensive as the previous guy said. It wouldn't be basic bolts on's though.

But why? Just buy a M52, buy a used supercharger kit and be done with it. It's the cheaper route.

Or just get a Euro S50, cheaper then a S54 and a easy swap.

T.Dot_E30
10-18-2012, 04:58 PM
But why? Just buy a M52, buy a used supercharger kit and be done with it. It's the cheaper route.


This.

Until the head-gasket or something else blows....

richie_s999
10-18-2012, 05:13 PM
V8 swap ftw!!

Tyman
10-18-2012, 05:30 PM
would i be able to fit an m60 in my e30 or would that be alot of work? So im thinking that swaping in an s52 would be the most reliable choice and close to the power i want

richie_s999
10-18-2012, 05:48 PM
Any v8 will fit. Cheapest v8 swap is ford 5.0.

SamE30e
10-18-2012, 08:04 PM
This.

Until the head-gasket or something else blows....

They're designed to use stock head gaskets... And at such low boost, it's un-likely that it would blow unless the engine was not previously maintained properly.

SamE30e
10-18-2012, 08:05 PM
Any v8 will fit. Cheapest v8 swap is ford 5.0.

Terrible idea....

LSx maybe. Iron block... No

richie_s999
10-18-2012, 09:30 PM
Terrible idea....

LSx maybe. Iron block... No

yes an LSx would be best but the 5.0 motor is much more affordable, with aluminum heads the motor weighs pretty much the same as an M52, and as it sits closer to the center of the car balance is just as good or better for handling.

the is a 380hp 5.0 mildly built, for $800, say $1000 for the other parts you need for the swap, that,s alot of bang for buck!!

Dan's E36 with the LS6 is a pure monster, and handles great, and the white E36 with the 5.0 thats been out at autoslalom a couple times is pretty crazy

Tyman
10-18-2012, 10:06 PM
how hard would it be to fit one of these into an e30?

richie_s999
10-19-2012, 04:53 AM
how hard would it be to fit one of these into an e30?

http://www.e30v8.com/details.html

no more work then swapping in an m50

e30_kid89
10-19-2012, 07:19 AM
http://www.e30v8.com/details.html

no more work then swapping in an m50

I disagree. More work than a m50 by far.....an m50 swap into an e30 is pretty much bolt-in besides some minor wiring.

kenmar
10-19-2012, 08:38 AM
They're designed to use stock head gaskets... And at such low boost, it's un-likely that it would blow unless the engine was not previously maintained properly.

What you do is buy a M5x with good compression, do a refresh on all the gaskets (incl. the head gasket) and then swap it in. With all the gaskets/seals done, the bottom end should last longer than your shell would hold up

T.Dot_E30
10-19-2012, 08:57 AM
They're designed to use stock head gaskets... And at such low boost, it's un-likely that it would blow unless the engine was not previously maintained properly.

I donno man, almost everyone I know of locally who went FI had issues eventually with the motor. Without opening the motor, FI on these motors is not proven to be reliable, unless you never drive it hard or make it a garage queen.

DANIMAL
10-19-2012, 10:06 AM
Ah, Id say V8 swap of course but lets be honest here, its about half the price to do an M/S52 with FI. You do get a lot more torque and hp with the LS but its been you are paying for it and there is no guarantee its going to be any more reliable. Ultimately I am not so sure its for everyone, you really have to be into the 'project' frame of mind when you start going down that road as it never really ends. If your just starting out at the track you don't need that kind of power; chances are you wont really be able to use/appreciate it anyways, not that I presume to know your driving history. You would be better off just driving a refreshed M52 stock (as others suggested) and taking a few schools. Learn what you can do with your car and you would be surprised how much faster you can be compared to higher horsepower competitors. This is assuming that your primary use of 300hp is more than just highway pulls and bragging rights.

SiR
10-19-2012, 10:22 AM
FI on the m52 is easily the best bang for the buck. no question

headgaskets can be an issue...id do updated arp's with a fresh oem gasket at a minimum....unless you want to see how far the engine will go without touching it. Sometimes they are perfectly fine. depends on usage/life.

cormier
10-19-2012, 11:36 AM
Cheapest to 300 IMO is LSx, or SC m/s5x

More expensive, get SF to drop in an s54.

sb_600
10-19-2012, 11:43 AM
It's possible but a lot of work.

Look at my engine build. I have 232WHP with stock S52 cams, overbore, and 11.5:1 pistons. Runs on pump gas.

With an agressive cam (sunbelt/evosport) and some head work I could probably up that number by 30-40HP, but even then, I'm still relatively far from your "300WHP" mark.

Now if all you care about is bragging rights, then you can easily say that my engine has 275HP (at the crank), and therefore with the cams would have well over 300hp.



Now, I spent about $5k on the motor (complete rebuild incl. bolts, guides, bearings, pistons, machining, all new sensors as well as bolt ons like pulleys, intake, headers, custom exhaust, and cams). If you wanted to go with an aggressive cam, then you're looking at about another $3k for top end work...

So for less than $10k you can have a "300+HP" N/A M52 that will be fairly reliable, and insane to drive on the street.

e30_kid89
10-20-2012, 04:11 AM
I donno man, almost everyone I know of locally who went FI had issues eventually with the motor. Without opening the motor, FI on these motors is not proven to be reliable, unless you never drive it hard or make it a garage queen.

I had issues with components around the motor, but not the actual motor itself. To track an FI car reliably you need to up the cooling system to deal with the extra heat and run no more than 8-10 pounds of boost, an m52/s52 with any half decent turbo setup will be making 350-400whp easily with that little boost which is more than enough for any track car. It's all in the motor prep, and putting together an solid setup. With an FI car you gotta be on top of things versus n/a where you can most likely get away with a not-so-great put together motor. There are dozens of guys in the US doing 20-30 track days, drift events etc with boosted m5x motors, I'd say they're up to the task.

On a turbo/supercharged car you cannot expect things(even the motor itself) to last as long as the stock counterpart. Only few can pay to play....

If anyone is wondering, I has a m52b28 with a forged bottom end, o-ringed block and i'm using a stock headgasket. With boost of course. Love it!*wave*

doogee
10-20-2012, 02:14 PM
So for less than $10k you can have a "300+HP" N/A M52 that will be fairly reliable, and insane to drive on the street.

Word. By the time you get NA 300hp out of an M52, you won't even want to drive it on the street since it'll freak out at low rpm, and won't have any power until the top end.

SamE30e
10-22-2012, 09:37 AM
What you do is buy a M5x with good compression, do a refresh on all the gaskets (incl. the head gasket) and then swap it in. With all the gaskets/seals done, the bottom end should last longer than your shell would hold up

Yeah, but if that was the case you might as well spend the extra $300 and put in a MLS gasket like cometic, and a set of ARP's and you're good all the way to 15psi and 350+whp.

In reality it's not expensive to put together an engine. A set of forged rods like Manley, or Crower can be had for less than $500, and pistons come it at around $750. An if you're using an iron block, you're laughing till you hit 500whp. It's the proper assembly and machine work that tells if it will last or not. Like Devon said, it's the assembly that separates the men from the boys. We're working in 0.0001 of an inch in some cases.