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 Welcome to the thread where I probably ruin my 2006 Sepang / Sepang Z4M Coupe!  I have a long, proud, history of modding cars until they suck to drive except in very specific circumstances. Out of 5 cars that I've built, only 1 of them survived as a daily and was still really fun. Maybe this one will be the second. Probably not  it's a track bitch now I bought this car in August of 2014 with around 50k km on it. It was bone stock, and the front bumper was (is) a bit messed up; I got a decent deal on it, and vowed to leave it stock, as one does, which lasted until the first track day I did in it. The Z4MC is so loving good on the track, but it tells you the whole time how it can be better. "I just need a little more rubber, and a little more suspension, and a little more power, and a little more brake, and I'll be perfect for you" is what it whispers in your ear the whole time. So, last year, I installed a set of Ground Control coilovers with 550lb-in front springs and 700lb-in rear springs, deleted the rear sway (well, disconnected it), did a stud conversion, put 18x9.5" ET35 Apex EC-7s on all four corners (12mm spacers in the rear) with some 200AA A Kumhos, threw ECS floating front rotors on front and fresh BMW rotors in the rear, changed the pads out for Hawk HP+, and went back to the track. The results were... somewhat positive: https://www.youtube.com/watch?v=1wTzG00CbrA&t=272s That was something like 12 seconds faster than my previous best time at the Ridge. As you may be able to tell from the video, I was pleased with this outcome. So of course I ordered a bunch of poo poo, like, immediately after that. Come along for the ride as I install a bunch of bits, hopefully don't blow up the S54 this season, but when it lets go the car is getting a V8, and spend thousands of dollars to knock a second or two off laps at this track! Which I could do by improving my driving. But that wouldn't be as I've been building a parts pile for the past four months or so, and am installed a two-post lift in the garage in the next couple of weeks. Here's what's slated for the winter: * Installing AP Racing CF front splitter / rear wing * Installing Evolve CF CSL-style airbox / doing speed-density tune on dyno * Installing Schrick 288/280 degree cams and new followers [I'm still waiting on these to arrive, two months later. Hiya, VAC Performance! I'd love to receive these this year.] * Installing Porsche / Brembo 4-pot brakes all around with RallyRoad adapters and Hawk HP-10 pads * Installing eBay exhaust headers * Scratch-building header-back 2.5" stainless exhaust system * Re-tuning on the dyno for the whole system. Attempting to keep car emissions legal for street use * Probably rebuild all of the VANOS poo poo * Hopefully don't forget to replace all of the cam gear bolts * Maybe get the mechanical timing right * Inspect the rod bearings? Later on I'll be dealing with seats, harness bar, harnesses, and all of that fun poo poo. Eventually it will probably be a trailer-only track / parking lot bitch, but I'm delaying that outcome for as long as possible. Probably. Some additional snaps of the car and parts follow.        And one shot for inspiration:  
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Dec 5, 2016 21:38
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Hooray. I feel this car is my cars spiritual brother 😎
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Dec 5, 2016 21:50
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That's a heck of a list of upgrades, but what does sepang/sepang mean?
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Dec 5, 2016 21:53
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MrSaturn posted:That's a heck of a list of upgrades, but what does sepang/sepang mean? Colours.
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Dec 5, 2016 21:59
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I wanna see the lift 
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Dec 5, 2016 22:06
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Bape Culture posted:Colours. Ah. I guess "Beige"/"Sad brown" isn't good enough! Thanks!
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Dec 5, 2016 22:11
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Bape Culture posted:Colours.  racing livery option:
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Dec 5, 2016 22:24
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Sepang is by far the coolest colour BMW has done since Laguna Seca Blue.
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Dec 6, 2016 00:44
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Bape Culture posted:Hooray. I feel this car is my cars spiritual brother 😎 You're not wrong.  Data Graham posted:I wanna see the lift I pick it up Friday evening and unload it Saturday morning, pictures will come. MrSaturn posted:Ah. I guess "Beige"/"Sad brown" isn't good enough! Thanks! That's metallic bronze over chocolate brown, jerk.  (Yes, old man colours. I only mention it because it is literally one of four in North America in that combo) InitialDave posted:There's always the I... had never seen that.  Holy poo poo, the exhaust dumps just past the front wheels? That thing must be monstrously loud. I have the weirdest boner right now.
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Dec 6, 2016 00:44
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Popete posted:Sepang is by far the coolest colour BMW has done since Laguna Seca Blue. I really, really like it. I really, really like Laguna Seca Blue, too.
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Dec 6, 2016 00:45
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Ah yes.... (If you get bored of the S54 before it blows up I am in the market)
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Dec 6, 2016 01:04
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BlackMK4 posted:Ah yes.... With the Evolve airbox and Schrick cams? I am willing to go full retard on this today if the finances work.
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Dec 6, 2016 01:42
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I think that's a little too full retard for my purse straps right now
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Dec 6, 2016 02:40
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This is great. Looking forward to hearing the cammed S54
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Dec 6, 2016 04:17
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Do these things have the same issue with the rear subframe/chassis mounts like the 3 series? Also you need speed holes in the hood and fenders.
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Dec 6, 2016 04:37
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BlackMK4 posted:I think that's a little too full retard for my purse straps right now Alright I could cancel the cams and sell the airbox separately, or we can talk about getting you a tuned engine for the end of next season... Lightbulb Out posted:This is great. Looking forward to hearing the cammed S54 Me too. Especially with the CSL airbox. I think it's going to be very mean. jamal posted:Do these things have the same issue with the rear subframe/chassis mounts like the 3 series? They don't, no. And yes, I do. I won't be buying the actual GT wide body in carbon fibre, but I kind of want to learn to work with CF myself...
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Dec 6, 2016 06:49
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Nice Looking forward to this build.
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Dec 6, 2016 13:04
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Glad to see another M-car getting used the way it was meant to be
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Dec 6, 2016 16:05
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Bilsteins, Brembos and Inevitably dead rods and a V8 swap planned in case? (Has there ever been an M car without rod bearing problems?)
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Dec 6, 2016 16:50
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InitialDave posted:There's always the Came to post this but beaten.  Get all your parts from here: http://www.studie.jp Here's some build inspiration: http://www.zpost.com/forums/showthread.php?t=102549 And when the engine blows, put a 2JZ in it, in spirit of the next Toyota Supra/Z4. Good times!
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Dec 6, 2016 17:04
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The S54 can be thought of an evolution of the 2JZ, in a way, real talk
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Dec 6, 2016 17:48
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Can you put an S65 in it?
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Dec 6, 2016 17:52
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Rigged Death Trap posted:Bilsteins, Brembos and Inevitably dead rods and a V8 swap planned in case? As far as I know the only engine with a rod bearing issue is the S54 engine which is shared between the Z4M and e46 M3.
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Dec 6, 2016 17:58
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S65s also have bearing issues.
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Dec 6, 2016 18:11
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Lightbulb Out posted:S65s also have bearing issues. Are rod bearings BMWs new water pump?
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Dec 6, 2016 18:13
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Is there a recent S motor without rod bearing issues? The S85 also has issues.
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Dec 6, 2016 18:48
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There's like a <5% chance you'll have rod bearing issues in the S65/S85 but it's the only thing anyone ever talks about on those motors because nothing else ever really goes wrong.
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Dec 6, 2016 20:13
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Wut, the S85 is pretty much guaranteed to roach the things.
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Dec 6, 2016 21:00
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News to me, I know a lot of people pre-emptively swap them out for $2k or so and everyone I know who runs the S65 or S85 blackstones them religiously but I never followed the S85 that closely so perhaps they're worse than the S65, of which the failure rate is minimal but a big deal when it happens so gets plenty of discussion. I know two guys who owned S85's for 3-5 years and did not have the issue arise so that is my anecdote.
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Dec 6, 2016 21:06
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I will be swapping in a Coyote or LS when the day comes - I don't want the car to sound like an American V8 but the price / performance and aftermarket support are unbeatable.
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Dec 6, 2016 23:07
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HandlingByJebus posted:
I thought it was funny that the exhaust dumps on the wrong side, turns out they used de-tuned S62 and S65 engines so I guess that is do-able at least with a SuperGT budget. Bibendum fucked around with this message at 23:18 on Dec 6, 2016 |
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Dec 6, 2016 23:16
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HandlingByJebus posted:I will be swapping in a Coyote or LS when the day comes - I don't want the car to sound like an American V8 but the price / performance and aftermarket support are unbeatable. How bout a Voodoo
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Dec 6, 2016 23:46
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Data Graham posted:How bout a Voodoo That would be freaking awesome. They're super expensive in crates still though. But yes, Voodoo, please.
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Dec 6, 2016 23:49
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Data Graham posted:How bout a Voodoo That's the GT350 engine, yeah? I think that should satisfy the "not sound American" qualification.
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Dec 7, 2016 03:58
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Yup. It is quite uncanny to hear a noise like that while you're flogging a Mustang. (and for it to rev to 8 grand  )
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Dec 7, 2016 04:24
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I said "still expensive in crates" when actually the truth is that Voodoo isn't available as a crate engine and Ford performance says that it intends to keep the flat-plane crank exclusive to the GT350. This is a shame but from a marketing perspective I guess I understand it. It would probably be a $25-30k crate engine, anyway (guessing, since the Coyote is still a $15k engine from Ford Performance, and the 5.2 "Voodoo/Coyote" is $22k). That's a little  even for me.
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Dec 7, 2016 07:20
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Well fooey. That'll teach me to assume such a thing exists just because people are apparently googling for it. 
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Dec 7, 2016 12:42
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I've always had a soft spot for the Z ///////M coupes. Don't see many of them around! Good luck with it
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Dec 7, 2016 13:44
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HandlingByJebus posted:Later on I'll be dealing with seats, harness bar, harnesses, and all of that fun poo poo. Eventually it will probably be a trailer-only track / parking lot bitch, but I'm delaying that outcome for as long as possible. Probably. I'd put cage/seats/harness higher on the priority list IMHO. I'm much more comfortable and therefore faster in a car with a proper seat and harness holding me in so I don't move around at all. Downside is you'll feel vulnerable in a non-caged car after driving in one for a while and the whole getting in/out of the car can be a bit trickier.
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Dec 7, 2016 16:40
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Ether Frenzy posted:There's like a <5% chance you'll have rod bearing issues in the S65/S85 but it's the only thing anyone ever talks about on those motors because nothing else ever really goes wrong. Controversial opinion, this is also the explanation for god drat cooling system hysteria on the e46... 
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Dec 7, 2016 18:20
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