Anyone running itb's on m30 ?

Post Sun Dec 21, 2008 1:33 pm

If so what has been used ???

Post Sun Dec 21, 2008 2:28 pm

Toby una used M5 tb's on his m30 turbo. Probably your best option?

Post Sun Dec 21, 2008 3:08 pm

Is it a straight fit or is the plenenth going to need modding.

Post Sun Dec 21, 2008 3:14 pm

IIRC they're way to big for a M30, they need an adapter flange for sure, spacing is well out, Toby had one made up, he had to mod the stat housing too, there's his build thread on here somewhere.

Post Sun Dec 21, 2008 4:08 pm

I thought they were too big but when i mentioned it to Dave Walker he thought they were OK because only 2 cylinders suck at one time.

If you do go ahead and get a set then chop the mounting lugs/flanges off the ITB's and an old m30 inlet, then weld the M30 lugs/flanges onto the ITB's, simpler than an adapter plate and trying to match up the differing port shapes.

Like Mark said the 'stat housing will need modding and it'd pay you to get a smaller servo and move it accross like the S50 boys do, this will mean you will have to mod the plenum less.

You would need to go AFM less to get the best out of them and a cam would help too.

Post Sun Dec 21, 2008 4:23 pm

It sounds like a lot of work. Will look into chopping up a manifold and see what bike tb's could work.

Post Sun Dec 21, 2008 10:35 pm

intake valve is to small unless you where going to use 40mm bodies or something like that.

Post Tue Dec 23, 2008 1:18 am

I had a set now on an other e21, adaptors are quire simple to make from some 10mm alloy plate. But if you want to use a set of Jenvey throttles I have a weber manifold

Jason

Post Tue Dec 23, 2008 6:10 pm

Gunni wrote:intake valve is to small unless you where going to use 40mm bodies or something like that.

Looked at the r1 bodies, They are 40mm internal too.

Post Wed Dec 24, 2008 11:43 am

Even though, the original manifold is probably not limited at the moment.
so just going to ITB´s doesn´t have to make more power.
I´d put in a cam before doing ITB´s.
Then I´d have the head ported to the limit of the intake manifold and exhaust.
All before putting itb´s on.

The only thing they really do is you gain in throttle response and the acoustic profile of the intake system changes,
that may be good and can be detrimental as well.

Bolt on tuning whatever you find isn´t proper tuning, if you get my drift.

Post Wed Dec 24, 2008 12:58 pm

I know this fella. Going with 278 cam. The head will be smoothd out but no need for porting as it is ok where it is.
Not going wild with this engine.

Post Sun Dec 28, 2008 1:15 pm

interesting this thread, what about simply sourcing a set of ITB's from a M88 engine and bolt on to it? remapp the engine and pronto.

will that be enough?

They share the same engine block although the M88 it's a 24v head or better yet, source a whole M88 head from an early 3.6 and bolt on a M30B35 using the complete hardware, cams, ITB's, ECU, etc, wouldn't that do the trick?

Post Sun Dec 28, 2008 3:42 pm

None of that will work, or if you could get it to work it's way way romoved from a bolt on job.

Only adapting the TB's is practical but still a lot of work.

diogogaspar wrote:interesting this thread, what about simply sourcing a set of ITB's from a M88 engine and bolt on to it? remapp the engine and pronto.

will that be enough?

They share the same engine block although the M88 it's a 24v head or better yet, source a whole M88 head from an early 3.6 and bolt on a M30B35 using the complete hardware, cams, ITB's, ECU, etc, wouldn't that do the trick?

Post Tue Dec 30, 2008 5:39 pm

yup you'll have to spend at least a day on a rolling road to make a proper fine tuning for the ITBs I was just taking thing forward a little bit more, since this isn't your common chip it, open air filter it, mild cam type of thingy

Post Wed Dec 31, 2008 9:32 pm

I always wanted to make a 3.8 M30 but it's to much cost for the M5 crank and the rest of the parts.

Post Thu Jan 01, 2009 11:22 am

Andy335Touring wrote:I always wanted to make a 3.8 M30 but it's to much cost for the M5 crank and the rest of the parts.

Would be more cost effective to just source a complete 3.8 or 3.6 imo.

Post Thu Jan 01, 2009 12:27 pm

zaust wrote:
Andy335Touring wrote:I always wanted to make a 3.8 M30 but it's to much cost for the M5 crank and the rest of the parts.
Would be more cost effective to just source a complete 3.8 or 3.6 imo.

If either of you are feelling flush....

http://www.e30zone.net/modules.php?name ... c&t=121944

Post Thu Jan 01, 2009 12:36 pm

I wish I could. Doing the head on this m30 is killing me as it is. Ordered the thicker gasket from the dealers but it won't be in till next week, so still off the road..

(i'm rubbing a lamp but F A is happining)

Post Thu Jan 01, 2009 4:12 pm

zaust wrote:I wish I could. Doing the head on this m30 is killing me as it is. Ordered the thicker gasket from the dealers but it won't be in till next week, so still off the road..

(i'm rubbing a lamp but F A is happining)

Have you had it skimmed ?

You can also get the thicker gasket from ECP, probobly too late now though ?

Post Fri Jan 02, 2009 9:12 am

Being checked monday to see if it need's a skimm. So till I know the amount taken off there is no point ordering, With bm You can get more choice of thickness, And for the same price, i would rather avoid ecp.

Post Fri Jan 02, 2009 10:18 am

You need to be fairly flush to fit ITB's on any car if you are buying them rather than making them. Even on a 4 cylinder car you are in the thick end of a £grand +. Thats before you consider any management to control it.

Then you'd want a really really spiky cam, and solid lifters, more expense.

Seems an awful lot for a £150 engine that only has one inlet valve per cylinder. One of the 3.6 or 3.8 options suddenly seems to be a lot better decision as they come with multiple valves, ITB's and probably, although I am not sure, a spiky pair of cams compared to an m30.

Turbo it, or fit a different engine.

Post Fri Jan 02, 2009 10:23 am

Jon_Bmw wrote:You need to be fairly flush to fit ITB's on any car if you are buying them rather than making them. Even on a 4 cylinder car you are in the thick end of a £grand +. Thats before you consider any management to control it. Then you'd want a really really spiky cam, and solid lifters, more expense.

Seems an awful lot for a £150 engine that only has one inlet valve per cylinder. One of the 3.6 or 3.8 options suddenly seems to be a lot better decision as they come with multiple valves, ITB's and probably, although I am not sure, a spiky pair of cams compared to an m30.

Turbo it, or fit a different engine.

It was more a thought than anything, But it is doable on a budget it's just seeing if it's viable. And at the mo it look's more like bbtb and a healthy remap would not give much less bt the tb's and msd would leave me more scope in the future.