engine swap...but which engine?

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user1830
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Fri Jul 15, 2011 7:49 pm

any thoughts on what engine i should replace my m10 with? will an e36 lump drop straight in? i have about £1200 tops to spend on it and need some ideas......sensible ones :wink:
adamski80
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Fri Jul 15, 2011 7:51 pm

loads of info on here mate just do a search
MurphyE30
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Fri Jul 15, 2011 7:52 pm

an e36 lump is a common conversion, theres M50 and M52 being 2.5 and 2.8

not a straight fit though theres some conversion parts you will need, ( not sure on what exactlys needed )

why not go for a nice M20? 2.5 or 2.7
kieran325
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Fri Jul 15, 2011 7:53 pm

Has anyone dropped a E46 330d in one yet ??
goosiegander
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Fri Jul 15, 2011 7:54 pm

kieran325 wrote:Has anyone dropped a E46 330d in one yet ??
Good question!
user1830
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Fri Jul 15, 2011 8:03 pm

yeah a 2.5 would be lovely but mine doesnt have rear discs. would that be a big problem?
i was thinking an is engine?
MurphyE30
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Fri Jul 15, 2011 8:05 pm

rear disc set up can be sorted, theres a set up in the for sale thread at the minute for £50 iirc
user1830
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Fri Jul 15, 2011 8:07 pm

what about the weight of the 6 pot compared to the light Is engine? i think its probably going to be one of the two. speaking to the guy that'll do it for me, an e36 engine would be a lot more work due to the mounts etc.
Rav335uk
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Fri Jul 15, 2011 8:12 pm

goosiegander wrote:
kieran325 wrote:Has anyone dropped a E46 330d in one yet ??
Good question!
That's alot of work isn't it???
:?
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Fri Jul 15, 2011 8:22 pm

1200 Spent on making a turbo m10 would be the way forward imo. Lots of power to be had out of these lumps.
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user1830
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Fri Jul 15, 2011 8:29 pm

the problem is the carbs and getting it running right with no engine management. ive looked into it and it seems a bit dodgy.
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peeweemad
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Fri Jul 15, 2011 11:01 pm

Slap a webber on there, carb problem solved.
retroboyo
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Sat Jul 16, 2011 12:24 am

A turbo m10 would make it something special imho
user1830
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Sat Jul 16, 2011 6:47 pm

i already have webers on it. i put them on last october to replace the pierberg. they're 30/32 i think, and have a manual choke which is quite cool. if anyone knows how to safely turbo this then please let me know as i can only find turbo kits for a 318 and the engine management problem as i mentioned above.
user1830
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Sat Jul 16, 2011 6:48 pm

i would honestly prefer to turbo it though. has anyone done this?
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toby
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Sat Jul 16, 2011 8:25 pm

For £1200 you'd struggle to get the thing running with a turbo.

M30 swap - bolts straight onto your existing gearbox (but it's a heavy old engine)

M20 swap could be done really nicely and do some tarting up of the car - replacing all the broken bits on the way.

M50 - costly for someone to do for you

Nasty side draft carb set up would be in your budget.
If done correctly this would make your little motor quite zippy but you'd have to throw all of your budget at it
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daimlerman
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Sat Jul 16, 2011 10:51 pm

M10 is a strong little engine,formed the basis of the F1 engine some years back.Can be taken to at least two litre,you need to be talking to guys with E21 cars for the best information.seek out E21Jason,and see what he can tell you.
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Ilkorin
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Sat Jul 16, 2011 11:03 pm

Turbo will take you past that budget really as you will need to go injection to get it right... might be an interesting project to stick an engine management system on it and go injection and wasted or full spark control. That should give you some more poke and give a good base for getting some boost in when your budget allows.

People who tell you to boost it and stick with carbs are probably the same sort who say running 11:1 AFR on a turbo car is good because it's "safe". My point being the inability to fine tune mixture control will either lose you both power and economy (best case) or ruin your engine (worst case).

But now the good news, if you do eventually liberate the funds, a boosted M10 can make silly power. Very bulletproof engine. Have a look at other people's projects on E30tech, there's a good number of boost crazies on there.
user1830
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Sun Jul 17, 2011 11:45 am

yeah i was thinking about dropping an m40 in and turboing that but that would definately be overbudget. anything over about 1200 and i may aswell just sell mine and buy an Is. still dont really know what to do. an m20b25 would probably be the best bet if i keep the car but im just worried about the weight of the lump and also having to change all the suspension, brakes etc.
how much power would sidedraft carbs add and what would that do to the fuel economy as its pretty bad with the webers i have already. not a massive issue to me but would like to do more than 15mpg :wink:
d6dph
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Sun Jul 17, 2011 11:50 am

What about a set of bike carbs?
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DanThe
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Sun Jul 17, 2011 12:18 pm

Carbs are shit, you should be thinking about converting the engine to injection or binning it IMO
Dan320is
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Sun Jul 17, 2011 12:20 pm

d6dph wrote:What about a set of bike carbs?
+1.

Do some research on M10's, they're fantastic engines and in my opinion a better option than the M20. Buy yourself another M10, rebuild it with some headwork, a nice cam along with the bike carbs.

You'll have M20 power without the weight and you wont have the complications with a conversion.
user1830
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Sun Jul 17, 2011 12:30 pm

what sort of cost would i be looking at if i wanted to build a custom m10. preferably i'd keep a four pot in there. also makes sense to try and avoid conversion complications if i can.
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toby
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Sun Jul 17, 2011 12:50 pm

Yours is a 'how long is a piece of string?' type question.
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toby
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Sun Jul 17, 2011 12:58 pm

Fuel economy isn't great with carbs. It wouldn't add a lot of power but you would get a snappy throttle response and it would howl and accelerate quite nicely. With twin carbs it has the advantage of individual throttle bodies. Carbs are an utter pain but fun when they work well. The most sensible swap is to a 318i M10 and add fuel injection if you want to keep it four pot.
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E30BeemerLad
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Sun Jul 24, 2011 11:24 am

Are you able to do the work yourself or are you going to need to pay someone to do the spannering?
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rychkaBMW
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Mon Jul 25, 2011 8:57 pm

everything depends from the cash u have for that,now i'm driving with m52b28tu(2,8 double vanos) under the bonnet,but now when i took my friends e30 with the 2,0ltr diesel from e46 for a test drive i was really surprised and the next swap it's going to be only 2,0ltr diesel,cause with the remaping u can get 200hp and 400nm
leeparkes
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Mon Jul 25, 2011 8:59 pm

rychkaBMW wrote:400nm
8O
Cypriotgeeza wrote:I done both my mates in my old 318is
felt so proud,even tried it with a E30 325i and got put in my place.. :o:
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rychkaBMW
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Mon Jul 25, 2011 9:43 pm



take a look ;)
Quaser
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Wed Jul 27, 2011 9:40 am

Personally, i think that if you are going to install another e30 engine, then you may as well sell yours and get the other e30. Dont forget the cost of insurance as anything you do will count as a modification.

My mate converted his car from auto to manual and his classic car policy doubled as it was a modification. He then bought a manual cab and price was the same as he originally was paying!

Just my 2p's worth

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BMW E30 2.0 Convertible (M52B28)
BMW E30 2.0 2 Door (M20B28 Turbo project to start)
BMW E36 328i Sport (M52B28 Turbo Project)
http://www.e30zone.net/modules.php?name ... ic&t=68663
deanocool
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Wed Jul 27, 2011 8:30 pm

im in the process of fitting an m50b25 into my tracker atm. for all the bits including gearbox, engine, ecu, m20 fly etc, ive budgeted £750 with the only labour charge being the custom exhaust. im on about £400 atm and i have all the parts. im quite handy with cars and my stepdads a mechanic by trade so im in the right ball park for a cheap upgrade. if youre lacking the know however then it would be costly to get someone else to do it for you.

turbo route is expensive and if not done right is a waste of time, money and most probably an engine + tears.

few of my mates have gone down the 'sack the 30 and get a 24v 36' route, as they couldnt afford/didnt have to facilities/knowhow to m50/52 their e30s and wanted 24/6 power. if i didnt have the facilities to fit an m50/52 i would have gone down the 36 route although i much prefer the 30 in whole as the car has buckets more character hence why i have one (that and the fact that the mrs hates my e30 which gives me more reason to keep it lol 8) ). just a thought if cost is a factor :)
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