M30 3.5L or M52 2.8 L ??

[magpie]

the cost to stroke my m52 to 3.0L is going to come in under £400

all i need is crank shells,head bolts,head/sump gasket,valve stem oil seals...jobbed

+ the m54 crank/rods/pistons which are being purchased today.

[jimbom30cab]

Cool Mick

Does this mod need the ecu mapping?

Why do need new valve seals?

Ta

[ross_jsy]

Because it would be a gash job to leave them out?

Seems 3 litre m5x's is the new thing around here. My crank is sat in the garage awaiting forged rods and low comp pistons

[magpie]

Dan has told me the car will run fine on the ecu he mapped for my m52 , the valve stem seals are being done as it would be rude not too really when the head is off .

i need to edit the list with head bolts lol

[magpie]

Because it would be a gash job to leave them out?

there you have it

[jimbom30cab]

Cool, yes well worth doing whilst head is off. Good news that the 'danthe' ecu works directly. Sounds like a relatively straightforward job. See if can do a write here mick, I can just imagine all m52 owners will be buying b30 cranks like mad !

With all the usual mods , a M52B30 should be shooting 230 to 235bhp

Tremendous !

[JungleGus]

I'm surprised people aren't talking about the weight...part of the reason the M3 handled so well was the balance (drive a 318 and 325 back to back and see what I mean).

The M52 is around 20-30kg lighter than the M20 (inc. all ancillaries). The M30 is a LOT heavier than the M20 (unsure exactly...but it's not light). M52 + M50 manifold makes 220hp or so...surely it's a no brainer?

[reggid]

you'll want to speak to Rich318i he is the expert AFAIK

[ross_jsy]

you'll want to speak to Rich318i he is the expert AFAIK

[scott320i]

M52 + M50 manifold makes 220hp or so...surely it's a no brainer?[/quote]

Pretty much what I was wanting to know....

[jimbom30cab]

225bhp on the RR for M52B28 with m50 man, bbtb, map and BTB system.

[scott320i]

Bbtb? Bbtb?
Is 225 at the wheels?

[jimbom30cab]

Big bored out m50 throttle body

[jimbom30cab]

Big bored out m50 throttle body

[scott320i]

So B28 throttle body is smaller also?

[ross_jsy]

Anyone know the details of fitting an s50 head to an m50 block out of curiosity? Not interested on VANOS, would be locked off

[magpie]

i'm using a big bore m52 throttle body

[scott320i]

Ok so M50B25 inlet is the go
What is the big throttle body off???

[ross_jsy]

You can use either a bored m50 or m52 one. Think magspower offers the boring service?

[scott320i]

So it's not a std item from a different motor...?

[jon-m42]

Want a fast car then the best way would be to buy a fast car, bite the bullet and get one it may not be an e30 of course but if it is an e30 you want then..


yes the options you have here are good but not fast. For speed and power you would much rather want to invest into a m5 engine out of an e60 m5. Put that in your e30 and enjoy a very fast e30.

please keep in mind if it is speed that you are after and power then this by far would out run both you 2.8 and 3.0 - 0-150mph.

[rob0r]

M30 for me, I've got an E28 535i in mine and I love it. Ignore the M30 weight comments, it's really not that bad. I've noticed this twice with both of my conversions, both previously M20.

[JungleGus]

A slight difference in scale of cost there, no?

2.8 m52 + M50 manifold makes a nice 40-50hp over a M20 2.5. not fast, but enjoyable.



[quote="jon-m42"For speed and power you would much rather want to invest into a m5 engine out of an e60 m5. Put that in your e30 and enjoy a very fast e30.

please keep in mind if it is speed that you are after and power then this by far would out run both you 2.8 and 3.0 - 0-150mph.[/quote]

[Simon13]

not really a nice tweeked M52 with a iron block and some tasty internals to get it out to 3.3 or 3.35 like alpina did and you can have your M30 torque as it will make 250-270 lbs like alpina managed and 300bhp to boot and still good MPG

Getting 300bhp from an M30 will be much harder, thirsty work. they are great aswell though

will cost a bomb either way once you start doing the bottom end on either motor, Alpina cranks are uber $$$ so you are limited to 3.2L mostly. Alpina had ported head and new cams, manifold. if you are swapping an engine and going this far then neither m30 or M52 based would be the one to go with. S38B38 and S54 are the best potential and in standard form you will be better off compared to anything you realistically to to the m30 or m52

just wait for an engine to come up, it will be cheaper than any S5X engine thats for sure, the servicing costs are cheaper than any S5X engine also plus they're no where near as highly strung. They're very grunty and if you were going to all that effort of converting to 24v power why settle for a stock engine? I wouldn't but thats me.

You could always build a 3.2 one for mucho cheapness. Mick you'll never build that engine for £400 without cutting corners

If your on about cost Reggid that M20 in your car came cheap did it tucka? like anything in cars its always expensive

[ross_jsy]

Want a fast car then the best way would be to buy a fast car, bite the bullet and get one it may not be an e30 of course but if it is an e30 you want then..


yes the options you have here are good but not fast. For speed and power you would much rather want to invest into a m5 engine out of an e60 m5. Put that in your e30 and enjoy a very fast e30.

please keep in mind if it is speed that you are after and power then this by far would out run both you 2.8 and 3.0 - 0-150mph.

>tells you to buy a fast car
>then tells you to stick an m5 lump in

Something tells me you have no idea what you are talking about!

[pony]

Servicing costs on S54 aren't that expensive and very similar to M20B25!!!

[pony]

Want a fast car then the best way would be to buy a fast car, bite the bullet and get one it may not be an e30 of course but if it is an e30 you want then..


yes the options you have here are good but not fast. For speed and power you would much rather want to invest into a m5 engine out of an e60 m5. Put that in your e30 and enjoy a very fast e30.

please keep in mind if it is speed that you are after and power then this by far would out run both you 2.8 and 3.0 - 0-150mph.

This

Get S54 or the M6 V10 NA engine into E30

[ross_jsy]

Well that is bullshit pony. Oil alone for an s54 costs a fair whack where as an m20 can be run on pretty much anything half decent and be fine. And then go price up adjusting the tappets on an e30 as opposed to valve clearances on an s54.

[Simon13]

who wants a V10 that breaks and does 8mpg no matter how you drive it? Utterly useless in an e30 imo they don't even sound that great

E30's struggle to deploy properly 220bhp in alot of conditions on the road let alone 500bhp.

I'd take the light tuned M52, you can abuse them they're good on fuel and that make an e30 a quick car by anyones standards

[pony]

Inspection II Service (S54)
BMW Dealer - £899
Indie £400

Inspection II Service (M20B25)
Private tech £200
BMW Dealer £900
Indie £500

[pony]

I thought valve clearances needed adjusting on S54 and M20 ?

[jon-m42]

Well that is bullshit pony. Oil alone for an s54 costs a fair whack where as an m20 can be run on pretty much anything half decent and be fine. And then go price up adjusting the tappets on an e30 as opposed to valve clearances on an s54.

I was talking about the BMW S85B50 is a DOHC V10 and was produced from 2005-2010. Used in the E60 M5 sedan.

Put that engine in and those melting dreams of getting to 0-150mph will become a reality plus much more.

Straight line speed will leave the m52 and m30 in its dust way behind in the rear view some place lost.

This depends on how large you bank account is full of cash as this clearly would be the most expensive way forward however by far it will be the fastest and if that is what you want you may well can consider this.

It has been done many times mostly outside the uk check up some youtube videos and look into it.

[ross_jsy]

You honestly think that will be the fastest?

Currently I'm building an m50 turbo. It started off as a simple thick headgasket job and has turned into a 3 litre, low comp forged bottom end. The hx40 turbo I have should be able to flow up to 750hp. I think by the time I'm done it will have cost me less than £7k all in, a lot cheaper than wedging some massively heavy v10 in.

Granted, it's not going to have OEM reliability of drivability and there is zero chance it will put the power down but it will be fun.

I'm well aware of s85 swaps. I wouldn't count the handful of swaps done as many times either. A zoner has just completeld swapping one in

[jimbom30cab]

Simon13 's above post = most sensible thing I've heard on here in weeks

[bss325i]

I thought valve clearances needed adjusting on S54 and M20 ?

An M20 has adjustable rockers to adjust the valve clearance where as the S54 has shims that set the clearance which are changed to alter the clearance.

It takes 3 times as long if not more to do the shims and you also have the cost of the shims to add on top. Also, the rocker cover gasket on the S64 costs more.