My first M30 swap details

[Gunni]

So I decided to put in the information for you guys to use if you wish.

Engine : 735i E32
Motor mounts : pos 3 www.e30.de
Motor mount bushings : M20 height polys
Oil pan and pickup : E32 / E34 items

Radiator : E28 535i
lower rad hose : E32 735i cut and a pipe added to lengthen the hose
upper rad hose : E23 this does not have the T section
Coolant tank : M20
Coolant to engine hose : M20 piece T connected under the manifold into the
hose from header core to engine back : something I had lying around
Hot Heater core side to back of head as opposed to E34 and E32

Trans : M10 318i E30
Drivershaft : M20B20 non modded
Gearshifter : stock E30 M20 item
Gearshit linkage : E36 M3 / same size as 320i linkage or should be
trans support : Stock E30 item

Exhaust : custom "2 from manifolds back, tupes in the back and a custom muffler in the back

Electronics : E32 ECU
Loom : M20B20 Motronic 1.3 harness spliced to lengthen TPS and AFM cables,
Timing : E32 front timing wheel, sensor.
AFM : 027 stock E32

Electrical fan in front of radiator,

[Andy335Touring]

Cool, don't forget some pictures though

Trans : M10 318i E30

Is the M10 gear box going to be strong enough and what clutch/fly wheel are you using with it ?

lower rad hose : E32 735i cut and a pipe added to lengthen the hose

You probobly are using it because you have it already but the E28 535 bottom hose fits on with no cutting.

[Gunni]

well since they have 500hp M10Ԛ´s out there then a 200hp M30 one isnԚ´t going to kill the trans

and itԚ´s a SPEC clutch and pressure plate , Stage 3, 290lbs holding power for the M10 (215mm clutch)

[m10man]

The M10 318i Getrag 240 box will be strong enough - and lighter! I would change the output flange to a larger one though.

[Gunni]

Why ??

Like I said if they have 500hp M10Ԛ´s with M10 driveshafts and transmission I canԚ´t see a weak part in the
drivertrain,

[m10man]

It'll just save you chewing out guibo's so quickly. The main weaklink with high powered M10's is the clutch, but you wont have to worry about that with the M30.

[gareth]

interesting!!!! could this be the holy grail for uprating a 4 pot E30 somewhat?!!!

i would be a little worries about the guibo but it's an easy and cheap enough part to replace if you do kill it. suck it and see i suppose?

what engine position did you end up with? there has been some comparison here:
http://www.e30zone.net/modules.php?name ... &start=100

[Andy325i]

Nice work mate

Andy

[Gunni]

interesting!!!! could this be the holy grail for uprating a 4 pot E30 somewhat?!!!

i would be a little worries about the guibo but it's an easy and cheap enough part to replace if you do kill it. suck it and see i suppose?

what engine position did you end up with? there has been some comparison here:
http://www.e30zone.net/modules.php?name ... &start=100

'I have the 3rd position, and I always use poly bushings, they make sure that
the engine stays where you put it ;)

[m-dtech]

pos 3 looks tight !

can you fit the engine and box together ? or u gotta drop the lump in then the engine ?

[Gunni]

yea engine and trans in together,
even with a M30 trans itԚ´s not that bad

[m-dtech]

hmmm this is another posibility for my 316 m10

[m10man]

Use a tilting bar and it all slips in in 10 minutes.

[m-dtech]

why was the m20b20 propshaft used ?

has the gearbox gone further forward / back ?

[Toby_Unna]

Gunni

m10 trans goes straight on to the back of an m30 then?

and it's compatible with engine in p3 and unmodded 320i propshaft?

does the gear lever sit in the right place?

no more pissing about with e30m3 propshafts and rare as f*ck manual m30 boxes then

[m-dtech]

Gunni

m10 trans goes straight on to the back of an m30 then?

and it's compatible with engine in p3 and unmodded 320i propshaft?

does the gear lever sit in the right place?

no more pissing about with e30m3 propshafts and rare as f*ck manual m30 boxes then

this is why i love this forum

[Gunni]

The 320i shaft : NO modding
trans support : NO modding

Shifter rod and related parts : I used a E36 M3 unit and shifter as that is what I had with me at the time,
but since the driveshaft has the correct length I would assume that the 320i assembly fits without issues,

my next conversion is going to be same but with the 320i shifting parts

[m-dtech]

The 320i shaft : NO modding
trans support : NO modding

Shifter rod and related parts : I used a E36 M3 unit and shifter as that is what I had with me at the time,
but since the driveshaft has the correct length I would assume that the 320i assembly fits without issues,

my next conversion is going to be same but with the 320i shifting parts

why could you not use the 316 drive shaft ?

[Gunni]

As I told you in msn,
itԚ´s too long, the M10 trans sits farther back when bolted to a M30 then when bolted to a M10,

[gareth]

this is simply bizzare!!! what flywheel and clutch did you use?

[Gunni]

M10 flywheel machined down to 5.xx kgԚ´s,
Spec Stage III clutch and pressure plate, rated at 290lbs

[DRIFTBOY]

Who'd have thought it? !!!

Amazing!

[gareth]

cool! how big is the M10 clutch? does your uprated one handle the torque ok?

[m-dtech]

must do as he is driving about in it lol

[TW166Y]

1. what would you recommend using for an exhaust? ive heard the m3 setup will be ok to use, but could a 325 system be used or not?

2. Radiator :-, ive just bought my e34 donor car so i take it i cant use the rad from it, so ill need to aquire a e28 535i one will i?

3. does an 320 prop fit instead of an m3 one then?

sorry for the questions fella, just wanna get it right 1st time around and all that, my project car is a e30 318i, so obviously ill need to uprate brakes, mounts, suspension and a few other things which i will also need help on. cheers pete

[DRIFTBOY]

In engine position 3 I used the E34 535i radiator.
Top and bottom hoses just need cutting down, use 2 right hand E30 bottom rad mounting plastic cups (might be same on E34 too but I'd scrapped my donor by then so I don't know) and standard 325i top mount bracket (same as other E30s maybe?) with slightly cut down rubbers.
It's very close to the distributor cap and crank pulley so must be in pos 3!

[gareth]

1. a 325i exhaust can be used but it's a smaller bore than the original M30 one so isn't ideal. a M3 one is the right bore and scorpion ones can be found fairly cheap as they're not as good on a M3 as the OEM one. both me and andy are using these. some mods need doing to the rear hanger as it's different to the 325i one. i welded up a bracket to use the M3 hanger. andy used modified 325i band type hangers.

2. the E28 rad is a lot thinner so would be better for space in all cases. the E34 one can be used but only in P3 as it's thicker. The E32 one is as thin as the E28 one but won't fit between the chassis legs.

3. only with a M10 gearbox by the loods of it. the M30 box needs a shorter prop. either a standard M3 one or a custom E32/4 manual / E30 one.

[TW166Y]

thanks lads

[m10man]

M10 flywheel machined down to 5.xx kgԚ´s,
Spec Stage III clutch and pressure plate, rated at 290lbs

Bloody hell! I wouldnt have been game enough to use the M10 flywheel and clutch. Like I said with high powered M10's this is the week point. The M10 clutch is 215mm as opposed to the M30's 240mm. I would recommend using the E28 240mm single mass flywheel and clutch setup.

[m10man]

1. what would you recommend using for an exhaust? ive heard the m3 setup will be ok to use, but could a 325 system be used or not?

I would recommend using a single 21/2 inch system with a rear muffler flowing at least 350cfm. If you find this too loud then put a resonator in halfway.

[Gunni]

1. I had a custom 2 x "2 setup made, it sounds so sweet, not loud at low rpms and idle, but when you stomp on it, it becomes awesome

2. E28 535i rad is the only one that fits, but of course a custom one is possible, of course you can have a thick one made that fits in front of where the stock one goes, this would allow for use off the mech fan.

3. a M3 one would not fit with a M10 trans , so a 320i one fits with a M10 trans.

Having problems with shifting into 2nd gear first, I made a 15.1 average in 1/4mile with a gtech pro.
one good 14.9 tough, so I will have to make another run when I get the car back,
hopefully getting in the mid 14Ԛ´s on average,

cool! how big is the M10 clutch? does your uprated one handle the torque ok?

Yea, I had to drive it relaxed at first and it did slip slightly, but after some driving around it started to hook up real well, now it can burn the tires from a dead stop in 2nd gear if I drop the clutch above 4k or so,
and at all loads and speeds it hold great,

the issue with the Stage III kit is that itԚ´s got a very short connection period on the clutch pedal, but you can get the Stage III+ it works like stock and handles even more power.

[Gunni]

M10 flywheel machined down to 5.xx kgԚ´s,
Spec Stage III clutch and pressure plate, rated at 290lbs

Bloody hell! I wouldnt have been game enough to use the M10 flywheel and clutch. Like I said with high powered M10's this is the week point. The M10 clutch is 215mm as opposed to the M30's 240mm. I would recommend using the E28 240mm single mass flywheel and clutch setup.

if you fit a 240mm flywheel you canԚ´t use a M10 trans

[Gunni]

1. what would you recommend using for an exhaust? ive heard the m3 setup will be ok to use, but could a 325 system be used or not?

I would recommend using a single 21/2 inch system with a rear muffler flowing at least 350cfm. If you find this too loud then put a resonator in halfway.

Why a single "2.5 ? by calculation that is the same diameter as a stock 325i exhaust i.e 2x "1.75, the 735i comes with a double "2 as stock
why would you want a smaller exhaust,

i.e a single "1.75 has a "2.40 square, so "4,8 on both of them
a single "2.5 has a square of "4,9

2 x "2 has got "6,28 square
a single "3 has got 7,06 square

[m10man]

if you fit a 240mm flywheel you canԚ´t use a M10 trans

Ah, so thats the catch. Well if you have your stage III clutch working well thats great. Opens up a lot more options - there are a lot of getrag 240/5 boxes out there cheap! Saves on driveshaft modifying cost too.

G-tech runs looking ok mate, I am planning on doing a few G-tech runs in mine this weekend.

[Gunni]

with a gtech pro???
if so send me the files when your done and I will post up a comparison, also do a dedicated HP run,
getting off easy in first gear and then shift very early into second and then mash it all up to the redline,
this will give the clearest HP figures,