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FCs with BMW 24V straight sixes?

Old 05-31-10, 05:36 PM
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FCs with BMW 24V straight sixes?

As title.

Ive seen it done here....









...but has anyone else seen more, or got any info?

It seems to fit nicely if you use the rear hump sumps, but has anyone here done it?
All engines from the early 90s M50 from a 525i to the E46 M3 CSL S54 engine should go in using the rear hump sump (all sumps are interchangable).

In the UK these engines are ten a penny, and far cheaper than any V8 to buy and tune over here, so could be a good option.

Be amazing if anyone did the mounts, but im not holding my breath...
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Old 06-01-10, 01:47 PM
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Hmm, not seen mounts for those.

Honestly though, why bother? They're HEAVY and don't make a whole lot of power, unless you're talking M3 EVO engines, and those aren't dime a dozen anywhere.

-Blake (E36 328iC and FC owner)
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Old 06-01-10, 01:54 PM
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M3 engines really are dime a dozen here, well, in comparison to V8s anyhow, sucks being in the UK for V8s. AND they much more powerful than US versions too.
Generally ebay UK will have 10x E36 or E46 M3 engines at any one time, but even a SBF or SBC, never mind an LS, will only come up once in a blue moon and even a stock SBF in need of a rebuild will cost only half what a working E36 M3 engine will.

Can easy make 500bhp turbo with very little effort too, even if its a 325 24V.

Last edited by StavFC; 06-01-10 at 01:56 PM.
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Old 06-01-10, 05:23 PM
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now thats a pointless swap
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Old 06-01-10, 07:55 PM
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Originally Posted by fstbckgt View Post
now thats a pointless swap
The engines cost next to nothing, even the 24V 2.5s can do 500bhp in turbo form reliably with northing more than a head gasket swap, the sumps are in the right place to fit straight in, even the gearstick ends up poking thru the original hole.

Looks like quite a few points to me?
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Old 06-02-10, 07:11 PM
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i dig it
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Old 06-02-10, 07:42 PM
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Real unique! I like it.
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Old 06-02-10, 07:52 PM
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and i understand they are tough engines ,durable. boosted should be easy 500hp, maybe more.

all the weight up front should make the rear drift no problem
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Old 06-03-10, 03:54 AM
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Iron block M50s are meant to weigh 190kg, thats less than a JZ or RB isnt it?
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Old 06-03-10, 05:09 AM
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Originally Posted by StavFC View Post
Iron block M50s are meant to weigh 190kg, thats less than a JZ or RB isnt it?
yup, but you also gotta think about the added weight from FI pieces though when thinking about a turbo m50. 1jz is 225kg and the r154 is 46kg. the rb26 is just under 260kg. i just wonder how much weight is from the turbos and accompanying parts
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Old 06-03-10, 05:20 AM
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could be fun
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Old 06-03-10, 05:21 AM
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A turbo/intercooler/wastegate wont add up to 70kg by a long way, and other parts will weigh similar regardless, so it looks like its on part with the Japanese alternatives, just far cheaper and more widely available, and in many respects easier to fit.

The later alloy M52 blocks are like 50kg lighter too I think? Cant remember now.

There is a guy in the UK attempting it now, ill see how that progresses I guess as nobody seems to have tried it here, and ive not got the patience/ability to attempt it blind, lol

Last edited by StavFC; 06-03-10 at 05:25 AM.
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Old 06-03-10, 05:22 AM
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give it a shot and take lots of pics!
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Old 06-03-10, 03:59 PM
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If the motors are as cheap as you say to get that power out of them and they are fairly light and go in relatively easily then it all makes sense. Still a goddam ugly looking donk though.

Depends on where you are for motors though, here in NZ a E46 bimmer 6 would cost a fortune to get and if you needed to replace any part then you would have to pay through the teeth.

People that do swaps into sevs here (of which there is around 2 in the country) put sr20's or v8's in. They only just get out the driveway normally and are then mobbed by a crowd of angry rotor heads and ritualistically beheaded for their blasphemy.
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Old 06-03-10, 05:21 PM
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Originally Posted by StavFC View Post
A turbo/intercooler/wastegate wont add up to 70kg by a long way, and other parts will weigh similar regardless, so it looks like its on part with the Japanese alternatives, just far cheaper and more widely available, and in many respects easier to fit.

The later alloy M52 blocks are like 50kg lighter too I think? Cant remember now.

There is a guy in the UK attempting it now, ill see how that progresses I guess as nobody seems to have tried it here, and ive not got the patience/ability to attempt it blind, lol
where is this 70kg difference coming from? is the m50 weight w/ tranny?
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Old 06-04-10, 04:50 AM
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Im wrong sorry, its 30kg lighter, and just from going from iron block to alloy in the M52s.

And regarding prices...

A stock 70s/80s small block chevy needing a rebuild in the UK is about 550.
A stock LS1 with plenty of miles would be about 2k+
A stock SR20 or 1JZ is about 800.
An RB26 is about 1500.
A stock M50 2.5 24V is 14 and everywhere. I know they 14 as I just bought one for that, lol.

And suitable transmissions are similar scales of cash.
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Old 10-24-11, 10:56 PM
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Here we have a really nice european talk ^^
Iam getting a FD3 with a blowed engine.

I live in Portugal and nobody knows to repair rotors or LTx \ LSx engines.

So I thinked in alternatives for a 13B.

I have seen the Jag V8 cheap, a lot going around, but F*cking Heavy.

And seen the BMW and Audi the next good trials.

But Audi engines are overpriced (or so I think)
BMW engine have lot laying around here and there in Europe.

And have thinked about the brilliant mess they did with the new BMW Series 1M, is a power drifter car. The M55 are a superb engine.

Hope to see some opinions.

Best thanks and regards.

Last edited by Guyver01; 10-24-11 at 11:03 PM.
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Old 12-05-11, 02:09 PM
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I'm a BMW enthusiast but also love the styling of rx7s. I'm planning on putting a turbo m52 in an fc and have already started working on the mounts. Should have a build thread here within the next week r
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Old 12-05-11, 02:10 PM
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I'm planning on putting a turbo m52 in a fc myself. Will be starting a build thread as soon as the projects on a good roll.
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Old 12-06-11, 12:32 PM
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Originally Posted by StavFC View Post
Iron block M50s are meant to weigh 190kg, thats less than a JZ or RB isnt it?
the RB engines are HEAVY! the JGTC skylines were running RB blocks with something like 120kg milled off of them, and they were STILL heavier than the V6...

its funny that in the UK the BMW engines are everywhere and cheap, its not like that in the US. they aren't really that reliable here either. we go racing with this other shop, and in a 25 hour race they go thru at least 2 engines, if not 3.
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Old 12-06-11, 12:46 PM
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I would not have guessed that a BMW straight six is that cheap to acquire. I'm sure parts are easy to find too. The thing about pushrod GM (and to a lesser extent Ford) engines is that they are all over the place around here.
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