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07-27-2017, 02:17 PM | #1 |
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I figured that I would start a build thread, I never thought I would do this but as I get more into the build I figure people could learn a thing or two from my experiences/mistakes.
The car was purchased from a older fellow who bought it new in 2008, this car was the test bed for Dinan E82 parts. When I picked up the car it had full Dinan "Stage 3" parts (Koni struts, Dinan Springs, Dinan FMIC, Dinan Oil Cooler, Dinan Stage 3 tune, Dinan Sways, etc) but this was obviously not enough... lol Just checked and I did my first track day in Q3 2015, so it's been about 2.5yrs. It all started very modest as I was saving for a house and my startup was still growing aka I didn't have the money to track, in Q3 2017 I started getting serious with the car knowing that 2018 I would start competing in Time Attack/Trials and try to be competitive. Once the real fun started, I started getting aggressive quickly... I swapped over some parts from my E92 335i I had previously and have slowly been building since. N54 Engine: - MHD 25% E85 Tune - BMS DCI - Dinan FMIC - Dinan Oil Cooler + Setrab 34 row In-Line (being installed asap) - Custom AT Cooler - VTT Silicone Inlets - VRSF DPs - BMS Chargepipe Suspension: - MCS 1WNR (KW V3 + ST XTA + Bilstein PSS9 + Koni Previously) - GC Camber Plates + Notched Tower - Dinan F Sway Bar Front: - Eibach #500 Springs - Megan Front Strut Bar - M3 Front Control Arms (Upper/Lower) - Rogue Engineering Front Control Arm Monoball Bushings Rear - DiffsOnline 3 Clutch 1.5way LSD (Mfactory LSD previously) - Eibach #750 Springs - Powerflex Subframe Bushing inserts (Front position) **Need solid ones ASAP - Powerflex Black Subframe Bushings (Rear Position) - Rogue Engineering Rear Toe Arms - SPL Rear Camber Arms Brakes/Tires/Wheels: - Stoptech ST60 BBK (Front) - Stock Rear brakes - RE71R 275/35 Square - Apex EC7 9.5x18 Square Interior/Exterior: - OEM 1M Front End - Sparco Circuit Seat / Grid Passenger Seat - Schroth 6pt harness - Custom 4 Point Half-Cage - Custom Mounts & APR Rep Wing Weight Savings: - Rear Seat Delete (-55lbs) - Sparco Seats (-65lbs) - Various Underhood Pieces (-10lbs) - Apex Rims (-33lbs) - Battery Swap (-40lbs) Future Mods: - Full Exhaust (-60lbs) - Gutting Weight to shoot for #2950... unlikely - Other Aero? - 1M rear Only "stock" photo I have of the car: [IMG]https://image.ibb.co/gQpL0Q/IMG_0032.jpg[/IMG] More Recent: [IMG]https://image.ibb.co/fkNCEk/IMG_1233.jpg[/IMG] [IMG]https://image.ibb.co/kmDf0Q/IMG_1238.png[/IMG] [IMG]https://image.ibb.co/kww00Q/IMG_1231.png[/IMG] Goals: [IMG]https://image.ibb.co/dvtBqQ/IMG_1652.jpg[/IMG] Current state - Car was sold in January 2022
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07-28-2017, 08:03 AM | #2 |
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I love the progression of the build. Our cars look pretty similar haha How did you do your transmission cooler? I am looking to build one but I have no idea on where to start.
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TiAg n55 DCT - FBO, suspension stuff, some aero
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07-28-2017, 08:48 AM | #3 |
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Looking forward to updates.
Any pictures of your seats? How you installed them? Can you get them a lot lower than the OEM seats?
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07-28-2017, 10:54 AM | #4 |
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Wow that's quite the list. Should be pretty nice on track.
Do you have specs for the 700# rear springs? I am thinking of doing that as well with my XTA kit. Also why did you change to 400# swift springs up front? Linear 400s should come with the XTA out of the box?! |
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07-28-2017, 12:51 PM | #5 | |
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Trying to get to 1:45ish at Laguna and ~2min at Thunderhill. The car is plenty fast, just need more seat time, this is only my 2nd season tracking.
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07-28-2017, 01:11 PM | #6 |
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Look into a composite hood and fenders if you come across them for a good price. That stuff weighs a lot and you don't need any more weight up front. Also I know of a battery solution that will allow you to remove the heavy cables going to the rear and use a 6lb battery up front to start and power the car.
You also could lose the sunroof, it's pretty heavy and in the worst place possible. You might also look into swapping the doors with a removable bar setup for the track days, the doors are unbelievably heavy. Also if your trackday organization allows it you can run an open downpipe. It's not that loud due to your turbos acting as mufflers and you save a ton of weight without the expense of a full system. |
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07-28-2017, 01:17 PM | #7 | |
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07-28-2017, 01:18 PM | #8 |
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Does anyone still make a bolt-in cage for 1ers? I heard most companies stopped making them
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07-28-2017, 01:54 PM | #9 | |
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Do you know the dimensions you used for the rear? I ask because I will probabl swap mine out next year for something a bit stiffer as well. The balance is close to neutral now but still a *bit* to understeery. A bit of extra rear spring should help neutralize it a bit more. Swapping to swifts will also change it from lightly progressive to linear. I do second the idea above to see if you can lighten up some of the front body panels, while simultaneously adding room for additional tire width. A little more tire, as well as less weight on the front axle should be quite noticeable on these cars. Depending on your level of experience you may want to just spend more $$ on seat time for now though. That will likely improve your lap times the most (while also being the most fun! ). Once you are reasonably comfortable and smooth with the car and pushing those Federal RSRRs to their limit (i.e. you should be in an advanced group) then you will probably want to move up in tire a bit. As you said something like a RE71 or maybe an "entry level" R-comp (NT-01, etc.) would be a logical next step. After that aero and brakes will be the biggest bang for the buck you will see for lap times. In a nutshell I personally would go: More seat time --> Improved tires --> Improved brakes --> Aero. Safety is safety and always important so that can trump anything if you feel more comfortable with/without it. Truth be told stuff like full exhaust, further lightening, etc, all are great but fall much lower on the bang-for-the-buck-o-meter. |
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07-28-2017, 01:58 PM | #10 | ||
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Luckily I'm spoiled in CA with a ton of local tracks and I've stopped traveling for work thankfully so I can dedicate almost 2 weekends a month to seat time. (If the wife approves)
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07-28-2017, 02:20 PM | #11 | |
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I do appreciate wanting to do mods though, we have all been there. IMHO do the stuff that gets you the most bang for the buck and doesn't stunt your ability to learn (better yet teaches you more). I love weight reduction as much as the next guy, but as an example lets take your setup and duplicate it. One guys spends a few grand taking out ~100 lbs in exhaust, sunroof, and fenders. While the other spends a few grand on R-Comps, bigger brakes, and aero. There will be no contest. The latter will run considerably faster, may end up even more street friendly as well (would just have silly wings on all the time ). So yea to me tires, brakes, and aero next. After that I would consider further weight reduction and high end dampers. |
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07-28-2017, 02:24 PM | #12 | ||
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I just need excuses to wrench when things aren't broken and unfortunately that means buying mods. At this point, I think the car is setup well enough for me to run for ~1-2yrs without any changes besides RComps and aero.
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07-28-2017, 02:26 PM | #13 | |
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They're great over there at OG for safety parts, and they price match other vendors which is awesome
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07-30-2017, 04:33 PM | #14 | |
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08-01-2017, 12:30 AM | #15 |
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Good day at Laguna, with this 65* weather I put down a 1:48 with street camber and no alignment since the new coils.
Loving the car, rotates a lot more though now with the Swift #700 springs + 100lbs of weight reduction in the rear.
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08-01-2017, 12:31 AM | #16 |
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Will upload footage from Laguna tomorrow! Stoked to get these seats in, they seem to just barely fit my lanky 5'11-6ft frame. Can't imagine many people fitting in these.
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08-01-2017, 10:38 PM | #17 |
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Test fitting as I wait for my BK brackets, not sure why they're not more popular, they allow you to retrofit your electric seats into any standard side mount seat using an E30 window switch (the electric motor is only ~3lbs) and the height difference is small.
I'm pretty tall so I'm going with floor mount driver side and electric passenger side for the wifey on the occasional weekend drives.
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08-01-2017, 10:58 PM | #19 |
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I tune it to around 17psi (inlets) and 11.5 degrees of timing on an E30 tune for cooling that runs extra rich. Id guess a little under 400whp for the track. Hard to make crazy power that's linear and easy to put down on stock snails but 400-450ish is plenty if you can get down close to 3,000lbs.
On the street I could probably put down closer to 475 with my mods but that kind of power is unnecessary when you're just looking to get seat time.
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08-11-2017, 08:54 AM | #20 |
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I couldn't find anyone after searching a couple years. I gave up and did this. Actually picked the car up yesterday.
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08-11-2017, 09:10 AM | #21 | |
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How did you decide on mounting points?
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08-11-2017, 09:18 AM | #22 | ||
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