Ap bbk

[BMWZ4MC]

I have an M3 kit - the rear fits without modification but the front callipers needed shimming with 2mm washers.

Sure, it's no biggy by any means, but if it were an m3 kit it would just swing it more towards buying a new 'correct' kit in my eyes.
If it is off a Z4M there will be no worries about the rear hoses of course.

Mine came from Fishy Dave, so all the work required to make an M3 kit into a Z4M kit had been done

[TomK]

Mine came from Fishy Dave, so all the work required to make an M3 kit into a Z4M kit had been done

He's not shy of a shim here and there is Dave I'll give you that!
I forgot they went your way. He bought an S2000 recently that I'm looking forward to sharing a few races with (first one in two weeks assuming we can get it together in time)

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[Ed Doe]

Mine came from Fishy Dave, so all the work required to make an M3 kit into a Z4M kit had been done

He's not shy of a shim here and there is Dave I'll give you that!
I forgot they went your way. He bought an S2000 recently that I'm looking forward to sharing a few races with (first one in two weeks assuming we can get it together in time)
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oooh an s2k race car, now that WILL be fun!

I so very nearly bought an s2k instead of my first Zed Coupe. Undoubtedly the S2k was the better drivers car, a big part of me still wants one now. Race report once you're done please Tom!

[BMWZ4MC]

That will be great fun. I ran an S2000 as my daily driver in London to keep the miles off my Zed. It was incredibly tail-happy, especially in the wet, but not unpredictable at all. Mine was a 2003 AP1 (so not the very first iteration of the car, but still pre-facelift with the 9000rpm rev limit).

The gear selector mechanism / gearbox was the real star of the show. Mine was more or less stock, except for the ‘UK exhaust mod’ (partial bypass of the rear silencers), additional heat shielding on the air intake, an aftermarket timing chain tensioner (the OEM is made of chocolate) and a (largely cosmetic) strut brace. There is a cone filter inside the air box which means that the car can be driven safely with the air box lid removed. Together with the exhaust modification, this made it sound absolutely crazy!

I don’t think the S2000 is a better driver’s car than a Z4M. I suppose it would be when compared with a 3.0 Z4C, but the 3.0 Zed would likely be faster in most circumstances on the road. Ignoring the propensity for rust, the only real failing of the S2000 is a lack of steering feel.

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Tom, give Dave my best wishes please, and tell him the APs are holding up well on >30C track days.

[TomK]

Will do Richard, glad to hear. Excellent brakes no doubt.
I'm looking forward to the s2k a lot, the few previous races I have competed in were in considerably slower cars.
This weighs about 1030kg and has ~240bhp, should be fun. I'm not all that up on them but they appear well designed, double wishbone all round, impressive mid-front engine location, and this particular car has been built to a very high standard. As you say, the epas looks to be a bit of a let down, much like that of the standard z4, but you can't have everything at this price I guess.
This '99 one I think does the 9k, has some kind of cf induction, decatted and a Janspeed exhaust, probably fairly rowdy!
We just need to install a brake booster (currently deleted and neither of us have Popeye legs), finish off the fire suppression plumbing, and get it through it's MOT hopefully.. Dave has been working on getting lights reinstalled and finding a temp CAT solution for the test

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[TomK]

oooh an s2k race car, now that WILL be fun!

I so very nearly bought an s2k instead of my first Zed Coupe. Undoubtedly the S2k was the better drivers car, a big part of me still wants one now. Race report once you're done please Tom!

I enjoyed it a lot I have to say, still rather drive mine but it's a good car for sure. We didn't fiddle around with anything since it raced last year with the previous owner. It felt a bit soft but since neither had driven it on track at all we were happy with this...

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I'll post a race report (most likely copied from Dave) when I get it in the 'other marques' section of the forum I guess.
It was a great buzz and I can see myself diverting more funds from trackdays to this tbh. I'm sure the M is thankful of a breather

[insider]

Very nice, congrats!

[Ed Doe]

Great effort Tom!!

Did you get any in-car videos of the racing? Twist Dave's arm to bung them up too!

Have you managed to get any closer to diagnosing the ?electrical? issue you had with the M of late?

[TomK]

Cheers Ed, yeah we were pretty chuffed even if the result was buoyed by quite some attrition of the field. There's a vid coming I'm sure but it was a relatively lonely race so not that exciting I suspect.
Haven't looked at the electrical issue at all as my focus has been on diagnosing what is most likely a head gasket failure, but there are some straws I'm still clutching toI'm back with the car next week so will know more then...

[Ed Doe]

Haven't looked at the electrical issue at all as my focus has been on diagnosing what is most likely a head gasket failure, but there are some straws I'm still clutching toI'm back with the car next week so will know more then...

Nooo!! Oh I'll keep my fingers crossed too then! Strange if it was HG, I'd not heard of that being much of an issue on the Z4 with the S54 - speaking to Mr Vanos, he said the main issue was the Mapping on the E46M3 coupled with the cowling over the back-end of the engine that resulted in more frequent HG failure - neither of which the Zed has.

Keep us posted!

[TomK]

Nooo!! Oh I'll keep my fingers crossed too then! Strange if it was HG, I'd not heard of that being much of an issue on the Z4 with the S54 - speaking to Mr Vanos, he said the main issue was the Mapping on the E46M3 coupled with the cowling over the back-end of the engine that resulted in more frequent HG failure - neither of which the Zed has.

Keep us posted!

Thanks! It's an odd one as if it has failed it has failed in a very uncommon way for an S54 which would normally go between cylinders (usually 5-6 for the cowling reason you mention). Mine appears to have gone into a coolant passage, we shall see

[Ed Doe]

That does sound odd. Presumably the symptoms you're getting then are overpressurised coolant? Was the issue present at Donny the other day? (I hope it wasn't as your car disappeared down the road from mine at a rate of knots - if it had a poorly engine then it'll make me feel even worse )

[TomK]

Exactly that. All was fine at Donington, drove back to west London, no issues at all. Drive to clerkenwell the next day and it started overheating in traffic after about 15 mins. Fan's definitely working. Got it back OK after letting it cool for 5mins. Opened the expansion tank next day and coolant came straight out. Started the engine and drove 10 mins coolant light came on and top rad hose felt pretty pumped. Engine seems absolutely fine, no pinking or signs of smoke/steam. Opened expansion tank a week later and it's pretty much empty which may or may not be a good sign as it has always had a tiny loss and I haven't checked it for a good 6 months or so.
Having spoken with a few specialists a stuck thermostat is a distinct possibility, but I dunno, feel like HG more likely...

[Ed Doe]

Exactly that. All was fine at Donington, drove back to west London, no issues at all. Drive to clerkenwell the next day and it started overheating in traffic after about 15 mins. Fan's definitely working. Got it back OK after letting it cool for 5mins. Opened the expansion tank next day and coolant came straight out. Started the engine and drove 10 mins coolant light came on and top rad hose felt pretty pumped. Engine seems absolutely fine, no pinking or signs of smoke/steam. Opened expansion tank a week later and it's pretty much empty which may or may not be a good sign as it has always had a tiny loss and I haven't checked it for a good 6 months or so.
Having spoken with a few specialists a stuck thermostat is a distinct possibility, but I dunno, feel like HG more likely...

I mean it's certainly an odd one - you'd have expected a head gasket to present itself when roasting hot on track, or at the very least on the way home. Very odd for it to have started to cause issues the next day!

Best of luck with it, I do hope it's something cheap like the thermostat!

[TomK]

Exactly that. All was fine at Donington, drove back to west London, no issues at all. Drive to clerkenwell the next day and it started overheating in traffic after about 15 mins. Fan's definitely working. Got it back OK after letting it cool for 5mins. Opened the expansion tank next day and coolant came straight out. Started the engine and drove 10 mins coolant light came on and top rad hose felt pretty pumped. Engine seems absolutely fine, no pinking or signs of smoke/steam. Opened expansion tank a week later and it's pretty much empty which may or may not be a good sign as it has always had a tiny loss and I haven't checked it for a good 6 months or so.
Having spoken with a few specialists a stuck thermostat is a distinct possibility, but I dunno, feel like HG more likely...

I mean it's certainly an odd one - you'd have expected a head gasket to present itself when roasting hot on track, or at the very least on the way home. Very odd for it to have started to cause issues the next day!

Best of luck with it, I do hope it's something cheap like the thermostat!

I'm going to chuck a stat on it next week and check the water pump impellar is still in the game. I'm not one for throwing parts on something to try fix, but it's not the easiest to diagnose and I figure I would probably do all that anyway when my wallet takes a beating and the head comes off