e30 with m54b30

[matt]

Better in most respects, I think, but I'm not an expert.

[BeirBrennerE30]

-So... better or worse than an s50?

smaller engine(less power depending on mods to said engine)... however a lighter engine. Also a bad engine for forced induction.

IMHO the s50 is a better engine than an aluminium m52

[matt]

smaller engine(less power depending on mods to said engine)... however a lighter engine. Also a bad engine for forced induction.

IMHO the s50 is a better engine than an aluminium m52

Read the whole thread again, please.

[alexbaby88]

If you are starting from an M50B25 base and have access to M54 crank, pistons and 135mm conrods, then you could argue that such a 3.0L stroker makes financial sense. Otherwise, if starting a DOHC conversion, you might as well plonk in an S50 right from the get go.

As for S50B30 vs M54B30: 240 bhp vs 231 bhp.
But for a stroked M50B30 using M54 parts plus S50 cams? who knows short of a proper dyno.

Matt - what software do you reckon might work with such a M50B30 stroker?Do yuu think stock S50 software might be adequate to do the job?

[PiercedE30]

as for rods, any S/M50/2 rods will work, other than the M50TU rods which are 140mm.

[matt]

If you are starting from an M50B25 base and have access to M54 crank, pistons and 135mm conrods, then you could argue that such a 3.0L stroker makes financial sense. Otherwise, if starting a DOHC conversion, you might as well plonk in an S50 right from the get go.

As for S50B30 vs M54B30: 240 bhp vs 231 bhp.
But for a stroked M50B30 using M54 parts plus S50 cams? who knows short of a proper dyno.

Matt - what software do you reckon might work with such a M50B30 stroker?Do yuu think stock S50 software might be adequate to do the job?

Depends on the compression ratio, cams, MAF, injectors, intake manifold ETC.... if all that stuff matches the S50, it would probably run pretty well.

I think my next project may be a complete OBDII compliant M54B30 e30. :pimp:

[Brew]

Keeping it OBD2 would be the only way to go with the M54, just for all the diagnostic capabilities. I think the S52 is a much better option though- you sacrifice a bit of weight, but the aftermarket is 10x bigger.

[matt]

Keeping it OBD2 would be the only way to go with the M54, just for all the diagnostic capabilities. I think the S52 is a much better option though- you sacrifice a bit of weight, but the aftermarket is 10x bigger.

Plus for the doppelvanos. The ECUs BMW uses now are the shit. Much more powerful than almost anything you can buy aftermarket. Just can't be tuned by the average joe.

[alexbaby88]

BTW how much bigger can the 2.5L M50 iron block be bored?

[matt]

BTW how much bigger can the 2.5L M50 iron block be bored?

86mm

[alexbaby88]

so 86 x 89.6 = 3.2L?

[matt]

I dunno... that's easy math. That sounds like S52 specs to me though.

[pwidaw]

Hello
Its my first post here. i'm the owner of this E30 with m54b30 engine.
it works since 1,5 year without any problems. I'm using this car on trackdays and for daily driving.

its all-alloy engine, so its much lighter than m52 or S50/52
engine has 2 vanos and its generate 230HP & 300Nm
There is no necessary to convert to OBD I. its running on MS43 with little mods.

We already made over 12's E30 with this Engine in Poland.
here is a photo story of my car :

http://www.e30m54.com/buni.htm

and video
1/4 vs M3 E46 http://youtube.com/watch?v=3N3_MHimPwQ
and some training http://youtube.com/watch?v=dibK_dU9SN0

[static]

^^ pictures don't work for me

and what is trenning?

[FredK]

Thanks for joining pwidaw!