ideas with fitting charger (M30B35 build)

[Speedtouch]

We need to see pics of these Porsche brakes on your E30, Ben

[Driftben]

ill pop down to the garage when i get abit of time and take pic. havent finished the fronts yet though. im still looking for E36 M3 hub, legs and control arms. thats the hard part finding them!

[Driftben]

hi all
abit of an update on progress....

i have got all the parts from cotswold so i have started the rebuild of the bottom end.....











i have changed all bearings and gaskets plus the tensioner and timing chain/guides .... so mostly everything.

its abit vague but i shall put abit more detail later on..

[Speedtouch]

Looking good, Ben Did you notice much wear on the bottom end parts, as I gather the M30 is pretty bulletproof and good for 250,000 miles between rebuilds...

[Driftben]

Cheers maurice. No the bottom end was quite good but I thought I'd give it a good old rebuild so it will last abit longer plus to cope with the strain of the charger.
Just need the time to put the oil level sensor and I can then spin it round to pop the modified head on.
It's all goooooo

[Driftben]

abit of a update on progress....

iv managed to build the bottom end and im in the flow of getting the head on.
abit unsure if i have a dual mass flywheel or a single?
couple of pics of the fly i have. so abit of advice on that would be spot on..








next step will be get a new cam and bolt the head on...

[DRIFTBOY]

Good stuff!

And that is a dual mass flywheel, you'll need an E34 535i clutch to fit on that.

[Driftben]

cheers driftboy

well im really after a lighter one ie a single mass fly. what model has these flywheels?

[DRIFTBOY]

Most commonly E28 535i / M535i.

Then you'll need an E28 clutch, they aren't interchangeable with E34.

When I slightly bodgily weighed the two flywheels side by side they were roughly 15kg for the E34 dual mass and around 10.5kg for the E28 single mass.

[Driftben]

ah i see so a good difference between the both then..

ill start looking. thankgod i didnt go buy a clutch first of all.
do you know if beefy is still doing the mounts?

[DRIFTBOY]

Not only is there a nice weight saving but the single mass won't go wrong like the horrid dual mass tat will!

And I do beleive that Beefy is still making the mounts, and getting very good feedback for them so I would feel confident going with his, not a bad price too.

[Driftben]

simple is best policy.

iv got 4 things to get now to complete.
new cam, a flywheel, a clutch and a set of the world famous beefy mounts. all money and plenty of it

[leeparkes]

Why did BMW choose to use a dual mass fly over the early lighter one's?

[Driftben]

because it makes more smoother changing gear as it keep the engine speed up? i think?

[DRIFTBOY]

Yeah, dual mass flywheels were fitted to give a smooth tske up of drive and gearchages.

The weight of the flywheel itself smooths things too, but usually clutch friction plates on non-dual mass have springs in them which absorb some shock.

It's not uncommon with quite modern cars that the first time the clutch needs changing a conversion to a single mass flywheel, from a facory fitted dual mass, is carried out.

Dual mass seems, at least partly, an epic fail for some car makers!

[Driftben]

you have to wonder why they made it more complicated for themselves? sure they are double the money to manufacture?

[DRIFTBOY]

Yes, they are rubbish!

[gareth]

my bro was telling me about upgrading the booooost on his seat leon tdi jobbie... to do this means a new bigger turbo (fair enough), a remap (again to be expected) but then an uprated clutch (to go from 150bhp to 180 bhp ) AND a single mass flywheel or it will detonate in spectacular fashion

utter pants if you ask me. maybe they're there on the diesel to remove some of the diesel's harshness but it still seems naff to me.

[Driftben]

Ya that sucks ass. I must admit this m30 is the first engine I have come across with a dual mass fly.
they probably put it on to help with the time taken for old gimmers to change gear

I'm now on a search for a E28 flywheel and clutch so if anyone has one floating about just chuck it my way

[gareth]

BMW spares in charing should have one. they sorted me out with a E34 box and E28 flywheel for my conversion. it'll set you back a bit though £200 for the box, £50 for the flywheel iirc

[Driftben]

Ah see I have the box but need a flywheel. I can stand £50 for a fly. Just need to prep myself for the clutch.

[gareth]

pop down there and have a rummage. the engines are all out of cars, on racks. you may get lucky and find a early M30 with a good clutch on the flywheel

[Driftben]

Ya I'll see if I can pop down there this weekend. Do you have a number gaz? I'll phone before I'll head down just to find out.

Also I have found a camshaft which looks in real good nick. It's from a M535. Does anyone have any stats on these over a standard m30b35 cam? Duration of lift, deg ect?

Thanks
B

[the_bear]

I believe the dual mass flywheel is to save destroying the transmission (or at least make it last) by limiting the torque the engine can transmit through the gearbox. It is designed to slip if overtorqued, when dumping the clutch or even giving to many beans during gear changes.
I am pretty sure Porsche use them as high powered rear drive rear engined cars have a lot of traction and the gearbox can be subject to a lot of stress. Obviously front drive isn't such a problem although my old Focus ST had one (was prone to failing too!). I can imagine tuned engines causing problems.

[Speedtouch]

Bmw Spares are at:

Bridgeend Farm, Hurstford Lane, Charing, Ashford TN27 0ER
Tel: 01233 713447

[Driftben]

Lovely stuff cheers maurice I'll get right on to them.

And cheers bear for the useful info. I thought they were for a greater good other than failing ;)

[gareth]

I believe the dual mass flywheel is to save destroying the transmission (or at least make it last) by limiting the torque the engine can transmit through the gearbox. It is designed to slip if overtorqued, when dumping the clutch or even giving to many beans during gear changes.
I am pretty sure Porsche use them as high powered rear drive rear engined cars have a lot of traction and the gearbox can be subject to a lot of stress. Obviously front drive isn't such a problem although my old Focus ST had one (was prone to failing too!). I can imagine tuned engines causing problems.

not on BMW ones, they have an inner 'core' that's isolated from the outer 'rim'. i'm not sure whether it's on rubber or springs as i've not actually seen one. i believe it's rubber, similar to the front pully/damper
here's a video that shows how a VW one works and the principles are the same

[the_bear]

not on BMW ones, they have an inner 'core' that's isolated from the outer 'rim'. i'm not sure whether it's on rubber or springs as i've not actually seen one. i believe it's rubber, similar to the front pully/damper
here's a video that shows how a VW one works and the principles are the same

I guess I should research more before offering an opinion!! Fords are the same, some kind of sprung damper too.

Back to BMW's..........

[Driftben]

So it still stands that the dual mass fly is still shit then?

I must admit I now know what a dual mass fly really does. Still want a single mass though

any one got any info on this M535 cam I'm wanting to get?

[Driftben]

Just rang BMW spares and they don't have a e28 fly or clutch ..... Pants

It's now something else Ill have to start looking for

[Driftben]

abit of an update on this build.....

i have built the head and im in the process of bolting it down to the block but before i do that i have a little question..

when the block is in TDC is there a mark on the camshaft to tell if its in the right position for TDC?

heres some pics.













this is my collet fitting device. cheap but affective

[Rav335uk]

BBB is doing a singlemass fly that takes the cheaper E34 clutch if thats any help.

[Driftben]

Cheers rav. Iv already researched that and have one planned

[Driftben]

had a real result today. i found a lad who is breaking a 535 sport so im off to meet him with my spanners on sunday to fill my pockets.
im going to wangle the rad, exhaust manifold, throttle body and all the pipes i can.. it shall be a tough day but well needed.

also im still stuck on putting the cam in the right position for the bottom end TDC. i cant bolt down the head to the block unless i know this...... please someone help

[gareth]

Cam timing on these seems to be annoyingly hit and miss. Do you have a haynes manual? If not, pm me your email address and i'll scan the page for you and email it over.

the alignment is done with two holes on the front pully both aligning with the crang from memory. rather gash