E28 - the long slog

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Original Poster:

16,804 posts

212 months

Thursday 10th October 2013
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Not much is really happening at the moment, largely down to time.

The diff is away being rebuilt as a 3.62 LSD, and there are stacks of parts waiting to be fitted. I'll have lots of free time to do this starting mid-November, so expect some updates after that.

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Original Poster:

16,804 posts

212 months

Tuesday 15th October 2013
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Throttle bodies before:



Throttle bodies after:



Pleasant.

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Original Poster:

16,804 posts

212 months

Monday 4th November 2013
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Not much at the moment, no.

The diff build is still ongoing. Discovered that the thread on the pinion is knackered, so had to source a replacement as it was too far gone to be repaired. That should be finished this week, with a view to me collecting it next week.

However, it isn't going to be fitted onto the car, as I've found a new (albeit possibly interim home for it), which is an E28 race car I've recently bought.

Anyway, the plan is to get the red car down for bodywork in a month's time, as the guy who's doing it is going to do it over Xmas, so hopefully it's still on-course to be on the road for spring.

I did remember over the weekend that I dropped one of the seats off to Bespoke Leathering when I collected the refreshed M5 interior, so I need to catch up with John and see how that's looking. One of the benefits of buying the race car is that it has given me a couple of ideas for things that could translate on to this one - seat sliders and mounts, for example.

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Original Poster:

16,804 posts

212 months

Monday 4th November 2013
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Original Poster:

16,804 posts

212 months

Monday 4th November 2013
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I'll get some decent pics when I finally get a chance to see it!

I see that green is the in colour for E28s this season hehe

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Original Poster:

16,804 posts

212 months

Monday 4th November 2013
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Yeah, that's a bit special, eh.

I've got a slightly less 1970s-Nan's shagpile steering wheel cover to go on when I see it!

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Original Poster:

16,804 posts

212 months

Monday 4th November 2013
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As many as I've got time for!

Appears to be elligible for the Future Classics and CTCRC, as well as MSV TT. As yet undecided where to focus.

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Original Poster:

16,804 posts

212 months

Tuesday 12th November 2013
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The diff build is now complete, so I collected it this morning.


...and took it straight up to where the racecar is being stored, ready to fit onto that hehe

It's only a temporary measure though, as the plan is to build a 3.91 LSD in a 188 case for the race car, and then get this diff back for the ex-518i.

Still, it's all progress!

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Original Poster:

16,804 posts

212 months

Thursday 28th November 2013
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Almost non-E28 update (although it is really) - passed the B+E test today, so next week I'll legally be able to use this:



to get the 518i down to the bodyshop.

Which means I need to re-attach the steering at some point.

In other E28 news, once the 518i is out of my garage the M5 is going in for a bit of love - the plan is a new fuel tank, fuel lines and brake lines, refurb of the front and rear axles (check bushes, strip, paint etc) and then I think it'll get a repaint - it needs a new front wing plus it has a few little dents and scrapes that can all get sorted in one hit.

The other E28 (are you keeping up at the back?) gets its first proper outing on Saturday at the Bedford GT circuit. The 3.62 diff is now on, and it's all ready to go. As this is the first time I've driven it properly (and really it's a shakedown) I'm not expecting miracles, but we'll see how it goes. It has needed a new battery, so an Oddyssey 20 is here to go on it. The M5 also needed a new battery this week - I guess the cold weather really kills off weak ones.

More to follow in due course...

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Original Poster:

16,804 posts

212 months

Thursday 28th November 2013
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Well, it's another three really hehe

What've you got, mister?

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Original Poster:

16,804 posts

212 months

Friday 29th November 2013
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You are. HTH.

E28 news - the bits of interior I dropped off for trimming haven't been done yet, which is fine. So rather than a two-phase approach (where one seat and door card was going to be done as a test) I'll drop the rest off a week Saturday so it can be done as one. There's going to be some fabrication required to make mounts for he front seats, but one benefit of the race car is that I've now found some sliders I can use, albeit they'll need the seat rails modified.

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Original Poster:

16,804 posts

212 months

Wednesday 18th December 2013
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Some, but not really for the red car!

The race car is currently undergoing a bit of work. After the trackday I discovered that the brakes are useless and it was running very rich, so it's getting a servo fitted to the front brake circuit, which should help. It'll also get new pads, the bias adjuster is now fitted properly and then some new fluid.

The M5 has gone to a bodyshop for a respray - there were little things all over it that needed doing, so may as well get the whole thing done, with a new pair of front wings to go on too.

I'm literally about to go and pick up a newly built diff for the race car, and so once that's swapped over the diff for the 518i will be available again. The red car should be disappearing for surgery at some point in Jan - it's going down to Martyn Scott @ Scott's Performance, but he's the one looking at the race car at the mo, so it'll be one in, one out.

And the remainder of the interior needs dropping off to Bespoke Leathering too. Suspect that'll be after Xmas.

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Original Poster:

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212 months

Thursday 16th January 2014
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Been after some of these for a while - not any more. Boom!

Current order of events:

- finish fixing race car
- replace fuel tank, lines and sunroof motor on M5 so it can go for paint
- do everything to 518i

So it should be getting some attention around the end of Feb at this rate.

Currently having a bit of a dilemma over wheels. I've got a set of 16" Style 5s from an E38 for it, which offer a good balance between aesthetics and ride comfort. I've also got a set of 17" Style 5s on the race car that I could put on it, but then I lose the ride comfort part to a degree. Plus I've had the 16s refurbished and new tyres fitted. Don't know - will probably have to toss a coin closer to the time.

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Original Poster:

16,804 posts

212 months

Thursday 16th January 2014
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Hactually I don't think that'll be an issue on this one - they're more to get the setup I want, which you can't do on the standard top mounts.

The race car, however, is reasonably likely to get new suspension in the next few months for exactly that reason.

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Original Poster:

16,804 posts

212 months

Friday 17th January 2014
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Don't think I ever put pics up of this from a while back, which is wrong considering how good a job he did.

I had John @ Bespoke Leathering refurb the leather in the M5, which showed every one of the 223,000 miles it has covered. The outer thigh bolster on the driver's seat was broken, but strangely so was the inner on the passenger side. It transpired that the seats had been swapped over previously.

Anywany, before:







During:







After:











That's in this one, in case you've lost the will to live:


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Original Poster:

16,804 posts

212 months

Wednesday 22nd January 2014
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[Cut to race car]

OK, so I picked up the race car yesterday from its fettling.

The job list included:

- fitting a servo to the front brake circuit
- swapping the diff to a 188 case 3.91 LSD
- changing the fuel lines to braided and running them in the cabin
- getting it to run properly
- changing the PAS pump
- fitting some RS29 pads

At the last outing the brakes were rubbish - solid pedal that did nothing, and the bias was heavily set to the rear, despite having an adjustment dial. It transpired that the garage selling it (see stickers for details) had plumbed the front and rear circuits the wring way round, and had ballsed up the bias dial fitting something chronic. So, the plumbing to the MCs was rejigged, the bias adjuster mounted correctly, and a servo (which IIRC is a MGB item) added to the front circuit. That, added to the new pads up front mean that once the pads are bedded in, I ought to be able to stop now and then.

Next up - the diff. I'd pinched the 210 case 3.64 I'd built for the 518i as an interim for this car, but wanted to go a bit shorter, and in a small case. Why a small case? Two reasons. Firstly, CWPs are easier to find (as are LSD cassettes, come to that). Secondly, it weighs less. They used a 188 case on the E36 M3 3.0, so it ought to be able to cope.

The diff was rebuilt by Competition Transmission Services in Markyate (they did the 3.64 too) and at my request they added some oil cooler unions into the back cover. They're blanked off for now, but if I do some longer races in the future I think it could be a good idea.

Fitting this diff was a bit of a nightmare, however. The case bolted up just fine, but the drive shaft ends were too big, and the rear mount was nowhere near the bolt on the body. To cut a long story short, what I thought was an E28 donor case turned out to be something else (E34 I think). After quite a bit of swearing an E28 donor was found, the output flanges and back cover swapped, and it all bolted up properly.

I'd saved the PAS pump from the 518i, and as the only difference across the range (M5 excepted) is the pulley, that swapped over just fine.

Now, the running issues had been a bit of a problem. It'd run fine for a bit, then it'd go really lumpy and run stupidly rich. To the point that at Bedford the marshalls said that if I couldn't make it smoke less, I wouldn't be back out on track. I couldn't, and I wasn't.

The apparent cause of the poor running is the alternator. It appears that the regulator has gone, and coupled with the fact that the car runs a small race battery, the ECU isn't getting proper voltage, which they really don't like, hence the strange running. I'll know for sure later, as I've sourced a new alternator to collect this afternoon.

Today's job is to go over the car once more in preparation for Brands Indy tomorrow, and to test fit another set of wheels/tyres I've got. It's currently sitting on worn R888s, and I have a set of Federal RS-Rs to try out. I suspect I'll end up running Kumhos, but we'll see how tomorrow goes.

The upshot of all of that is that the M5 is now in for a bit of fettling before it goes off to paint. Would expect to be picking it up by the end of next week, at which point the 518i goes in...

Some pics, since you've asked.

No servo:



A servo! And some fuel lines.



New diff:



Daft rubber fuel lines:



Alignment, pre-adjustment:



Obviously having 7 degrees of toe-out on the front wheels isn't ideal.

Stickers will be coming off today. The CTCRC stickers are from a previous owner, whereas it'll be going into CSCC Future Classics. And also, quite frankly, the garage on the rear quarters deserve no mention at all.

I'll end this post with a recommendation to you. Should you find yourself needing a garage in Dartford, you simply must go and see Martyn Scott at Scotts Performance. Top man.

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Original Poster:

16,804 posts

212 months

Wednesday 22nd January 2014
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It's was Martyn's idea (he's got one on his E30), but from what I remember it was about £100, is originally MGB fitment and needed a vacuum line tapping into the inlet manifold.

I'll see him tomorrow so can ask him more if you tell me what you want to know.

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Original Poster:

16,804 posts

212 months

Wednesday 22nd January 2014
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olly22n said:
Output Flange said:
I'll see him tomorrow so can ask him more if you tell me what you want to know.
That would be great thanks
>cough<

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Original Poster:

16,804 posts

212 months

Wednesday 22nd January 2014
quotequote all
olly22n said:
Ah, right, yeah.

Can I fit one to a 1969 lotus elan? Can't be anymore technical. Soz.
As long as you can get a vaccum line to it, I don't see why not. Obviously you'd need space for it too.

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Original Poster:

16,804 posts

212 months

Wednesday 22nd January 2014
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Mark, the E28 linkage is fairly convoluted, but my car has an OBP pedal box with the cylinders under your feet, so it doesn't suffer the factory setup.

You mean the Performance BMW day next month? I'm probably going to that too.