How much power can be extracted for the M42 ?

[Rob]

a few cams, 3 exhausts, 2 chips, and home made mods dont make for much of an aftermarket, nor do the make any power.

[Streetspec_iS]

Anyone know where i can source a S50 in Australia ? and how much would i be looking at ?

east coast wreckers. s50s dont come up that often. the cheapest i have seen was $6000 for an s50b30 a few years back. and your still looking at about $12000 for an s50b32. heck, even m50b25s are pulling around 4000$.

spoke to one of the guys here, and he has a line of a wrecked 3.2 m3 in Hong Kong, whole car was going for 14000$. but apparently he cant be bothered bringing it over right now.

unless you got big bills to spend, id consider the m50 as a base swap. try and find an alloy block to go with it. with some massaging to the motor, and the right rear diff ratio for your needs, i dont think you will be disappointed.

[Giorgio]

Once you ride in an s50 e30, you will want one. It has more power than my s14 (from 4500 rpms +) starting at like 2000rpms. I get to drive one soon :D

[e30Matt]

Once you ride in an s50 e30, you will want one. It has more power than my s14 (from 4500 rpms +) starting at like 2000rpms. I get to drive one soon :D

So true, so true.

[GreekDriver]

Anyone know where i can source a S50 in Australia ? and how much would i be looking at ?

east coast wreckers. s50s dont come up that often. the cheapest i have seen was $6000 for an s50b30 a few years back. and your still looking at about $12000 for an s50b32. heck, even m50b25s are pulling around 4000$.

spoke to one of the guys here, and he has a line of a wrecked 3.2 m3 in Hong Kong, whole car was going for 14000$. but apparently he cant be bothered bringing it over right now.

unless you got big bills to spend, id consider the m50 as a base swap. try and find an alloy block to go with it. with some massaging to the motor, and the right rear diff ratio for your needs, i dont think you will be disappointed.

Do you guys see what I mean about the DOHC motors not being price efficient? He could run an M20 with low(9psi) boost and still put up great numbers, and stay reliable.

[burtonownz]

The M20 will still lack the easy tuning qualities of a DOHC motor though. If he wants to change Intake/Exhaust timing he has to buy a new cam! DOHC is very much worth it.

But, you're right, he can still get good numbers using a SOHC application/

[trent]

Matt is not the only one with 300rwhp.

In addition, the M20 is crap naturally aspirated. I know that. I was telling him to get the M20 for purely forced induction reasons.

Do you people have some kind of hate for the M20? Put a stock 160k miles M50 under 13lbs of boost and tell me how it is in a week...

Why bother with a Euro ///M3 motor when a built M20 + turbo would make that Euro motor look like an M10. A rebuilt M20 setup for a turbo with a large turbo steup would be reliable and more powerful. The way I see it, is price for price a turbo M20 would produce more horspower than a Stock Euro M3 motor. When you start modding the M3 motor, you start paying alot for the additional horsepower, theres not much more N/A power you can squeez out. I see the M3 motor limited without throwing alot of money its way. I see ridiculous amounts of power from an M20 for cheap.

Tell me... What would be cheaper to get 420rwhp out of an M20 or an M3 motor.

Shut your fucking mouth you fucking idiot. You don't have a fucking clue as to what you are talking about. Stop spreading bullshit you monkey sack licking asshole.

[Skafrog]

Ok guys, damn. No need to get all upset, educate, dont slam.
The area under the curve would be devastating to a turbo m20. While your turbo m20 is still spooling, the euro s52 will be pulling away from you very rapidly, as it makes power all the way from idle. I would like t osee a dyno sheet from a turbo m20. If it makes 300 RWHP from 4-7 k, then I would say go for it. You will also have problems with reliability. A euro s52 is built to run at 321 HP for 200k miles. How long until your boost starts killing your engine internals, headgaskets, and at 200k miles, all your fuel metering devices?
GreekDriver, you really should learn your stuff before you start posting stuff like this. I have a feeling you know possibly 5% of the bolt on mods that an s52 can accept.
Why dont you call Pete McHenry, or any other engine modifier. Hell, call Jon at 615-500-1331. He knows what the hell he is doing, we just finished a euro s52 in an 89 m3 two days ago.

[mjc85]

If i do go for the S50B30 will i need to change do a 5 lug swap to fit bigger brakes ? Or can i keep my 4 lug and just upgrade the disc size or is this not possible ?

[e30Matt]

If i do go for the S50B30 will i need to change do a 5 lug swap to fit bigger brakes ? Or can i keep my 4 lug and just upgrade the disc size or is this not possible ?

Of course it's possible. Several companies, such as Wilwood and IE make big brake kits for the 4 lug cars. The only problem is finding wheels to clear them.

[mjc85]

I have 16inch wheels atm, would i need bigger wheels ?

[Wes325]

I have 16inch wheels atm, would i need bigger wheels ?

16" wheels are the minimum for RPI's kit. So you should be fine.

[mjc85]

Where do i find this "RPI" kit ? can someone please supply me with a link ?

[e30Matt]

I have 16inch wheels atm, would i need bigger wheels ?

16" wheels are the minimum for RPI's kit. So you should be fine.

It also depends on wheel to caliper clearance, though, doesn't it?

[Rob]

Where do i find this "RPI" kit ? can someone please supply me with a link ?

http://www.rpiequipped.com/

also talk to Ted on this board, as he has the kit, forgot his SN though