Couple of M30 conversion questions

[E30_Jatt]

I currently have an M30 3.5 engine from a E34, coupled with an M10 gearbox.

Now here's the part I need help with. I have been told that the clutch on the M10 is not up to the job of handling the M30 torque?

Therefore I have been looking around for a better clutch. A paddle clutch for the M10 box is in the region of £250, which is a bit expensive in my opinion.

So my thoughts and to get some opinions from you guys are, would it be better/cheaper if instead I look at buying an M30 gearbox? with this I guess I would also need a new flywheel to match?

The other thing I am curious to know is about the electric fan. I have got myself an E28 M535i radiator and have been looking at 16" fans on eBay, and thinking of getting something like this: http://www.ebay.co.uk/itm/310210593878 will something like this be ok for this application?

I have read on here somewhere that a two speed fan is best, I haven't seen many two speed ones for sale on eBay. Do I need a two speed fan, or can I just use a single speed one?

Thanks AJ

[staley_turbo]

Id get a m30 gearbox. The ratios might be better suited.

I have m30 flywheel with a new clutch (100 miles) if you need one?

Im using 2 10" fans on single speed. They do fine.

[jimbom30cab]

i know robOr used a M10 box with a performance clutch, worked well i believe and was a little lighter. I've used a M30 box with a 325 shift linkage as it just came my way at a good price. I really don't know if the M10 box internals are not as strong as the M30 ones ??

I've heard that SPAL fans are very good but the in your link looks ok, suppose you only real know when you use the motor and how you intend to drive it but for £20 odd you don't have much to lose. How are you going to wire in the fan? Are you using a "Danthe" loom ??

[E30_Jatt]

Id get a m30 gearbox. The ratios might be better suited.

I have m30 flywheel with a new clutch (100 miles) if you need one?

Im using 2 10" fans on single speed. They do fine.

Thanks, if I need them bits I will get in touch.

i know robOr used a M10 box with a performance clutch, worked well i believe and was a little lighter. I've used a M30 box with a 325 shift linkage as it just came my way at a good price. I really don't know if the M10 box internals are not as strong as the M30 ones ??

I've heard that SPAL fans are very good but the in your link looks ok, suppose you only real know when you use the motor and how you intend to drive it but for £20 odd you don't have much to lose. How are you going to wire in the fan? Are you using a "Danthe" loom ??

I'm also using the 325 linkage been told this is best. With regards to wiring the fan, because I am using an m535 rad it has temperature switches built into the radiator and I plan on using the dual temp e34 temp switch. I have read that the fan needs to be wired to the spare AC relay? in the fusebox. But what is this danthe loom like? Easier? Gotta be said vehicle electronics is not my forte.

AJ

[Bristol_Jer]

Don't bother with those ebay fans, they're not upto the job. I had one on mine and when sat in traffic the temp would just keep rising when the fan was on. Got myself a Kenlowe now (about £100) and it was well worth the money

[zaust]

The m10 boxes are strong enough. Either an updated m10 clutch or m30 box with e28 single mass flywheel and clutch. It's the same cash there abouts and labour too. If your happy with your box then clutch would be the awnser.
maybes little shave on the flywheel.

[E30_Jatt]

The m10 boxes are strong enough. Either an updated m10 clutch or m30 box with e28 single mass flywheel and clutch. It's the same cash there abouts and labour too. If your happy with your box then clutch would be the awnser.
maybes little shave on the flywheel.

So the M10 gearbox internals shouldn't have a problem coping? Well I'm pretty happy with the box but got a little put off when I heard that the box may not be strong enough for the job.

You reckon I should have the flywheel lightened? Do you have any ideas on what clutch would work well, brand/name?

Thanks

[rob0r]

As above, I used an M10 box with M10 flywheel and M10 uprated clutch. I'm not absolutely sure the clutch was strong enough but I only had the car on the road for a month or so before I had to sell it. It came from CG clutches and was £250. I'm 95% sure I used 320i linkage and propshaft, unless the M30 and M10 boxes are the same length in respect to the end of the linkage on the box and the box prop flange.

I'm under the opinion that the M30 box is longer than the M10 box. I believe the 320i used a shorter box than the longer 325i box, therefore the 320i prop/linkage is longer than 325i. My theory is...

M30 engine in position 3
M10 box - 320i prop/linkage
M30 box - 325i prop/linkage

Again this is just a theory, I will try and verify this in the coming weeks. My touring I first M30'd used an M10 box, it was previously a 320i manual converted to 325i engine, I suspect it still retained the 320i box, prop, linkage.

My new 4 door saloon I'm converting was previously a 320i auto which was been converted to a manual. I'm hoping they used a 320i box/prop/linkage as I'm planning to use another M10 box.

On my new build I'm going for another setup...
M10 box
S14 flywheel (228mm clutch diameter)
M20 paddle clutch (228mm)

The reason for this being I already had the M20 paddle clutch and M10 box and I picked up an S14 flywheel cheap. I also already have an M30 E34 box and E28 single mass flywheel but no clutch. An M30 clutch was going to be £200+, so I've saved myself at least £140ish by not buying a new clutch.

[E30_Jatt]

Another quick question I've got my m535 rad and wanted to know how most people using the same rad have mounted theirs.

I had a quick look if it would fit and realised I will need to cut the box section on one side, but what else do I need to mount it?

[staley_turbo]

I haven't cut any bodywork. There are rads out there that fit perfectly. Im using a e34 525i with aircon rad I think.

[E30_Jatt]

I haven't cut any bodywork. There are rads out there that fit perfectly. Im using a e34 525i with aircon rad I think.

I believe lee on here is using the same rad and had to cut the box section on one side as well to get it to sit properly.

I bet there are rads out there that fit straight in, but can't really go out and buy another rad already got this one and an m20 rad which is new too.

[Rav335uk]

E34 rad will fit, but you need to relocate on of the tabs on the botton, 10 min job.

[E30_Jatt]

E34 rad will fit, but you need to relocate on of the tabs on the botton, 10 min job.

But how about if I'm fitting the E28 rad, what do I need, (fixings etc) and what is the process?

[jimbom30cab]

i've got an e28 M535 rad and although i've not properly fitted it yet, i have test fitted it in place and it is a perfect fit, almost made to measure.

[zaust]

E28 rad here too. Held in place by large British telecom cable ties.
The helix organic clutches are mire than up to the job if your still looking.

[leeparkes]

I had to smash one of the original rad platforms off to allow the E28 rad to slide between the rails, once you got it between the rails it just fixes to the panel near the headlights. i got a pic somewhere....

[leeparkes]

Not my pic (Jers) but you get the idea.




There's holes already in the shell to use.

[Bristol_Jer]

Also you need to find a way of securing the bottom of the rad otherwise it swings about a bit on the top bolts. Cable ties are ideal for a quick fix

[E30_Jatt]

Yea that rubber mount thing looks like the ticket. Where can I get those? And any idea what bolts those are too?

[Bristol_Jer]

The rubber comes as part of the rad on a used one (mine did anyway), and I used a pair of 'chimney lug nuts' with normal m6 or m8 bolts (not sure which ones now, but the ones that fit nicely through the rubber

[Bristol_Jer]

Grr text filter, M 8 bolts

[E30_Jatt]

I see, unfortunately my brand new rad didn't come with the rubber bits. Any idea where I could source those rubber mounts?