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06-05-2016, 03:36 PM | #287 | |
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I'm leaning towards a 20' trailer and no cabinets/etc since I have no place to store it at my house. I don't want to go back and forth between storage. I think your E90 is pretty damned cool looking! I'm thinking about getting out of my E46 M3 into an E90 M3 for the track. I'm holding off right now on getting an E90 and I'm trying to find a way to keep both. This thread will be a ton of help. If I do get an E90...it would be just like yours! IB, no sunroof, DCT.
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06-05-2016, 04:29 PM | #288 | |
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Anyway, I love tracking the E90 M3. Yeah it overheats when it's hot but it is damn fun to drive. I get in other people's track cars and I'm not even remotely envious of what they have. There's a thread on vehicle weights. I posted a few thoughts over there about how to keep losing weight from my gutted/caged car. I figured it would be good to have those ideas in my thread too. So here's my thoughts about vehicle weight and where I can go from here on my build: My gutted, full cage, full aero, supercharged E90 M3 is 3250 lbs with no fuel, no driver. (I just weighed it a few days ago at Racewerkz.) I have estimated that it would take about another approximately $10,000 from here to lose another approximately 200 lbs: [All following measurements are approximate but should be in the neighborhood.] -carbon doors (115 lbs loss from my current gutted doors) -carbon trunk (7 lbs loss) -carbon roof (10lbs loss) -carbon hood (12 lbs loss) -Lexan rear window (11 lbs loss) -thinning of wiring (10 lbs loss) -removal of dash/center console (15 lbs loss) -super light weight battery to replace my MiniCooper battery (21 lbs loss) $10000 for 200 lbs equates to $50 per pound. Doing that would put the car around 3050 lbs. From there, one could consider dumping the VF supercharger which is around 100 lbs. That would solidly put you under 3000, but it would be a bummer to lose all that power. Not sure it's worth it. Let's put it this way, a 3050 lbs rear wheel drive car with full aero, 295 square R-comp tires and 560 whp would definitely give people a run for their money! |
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06-05-2016, 04:40 PM | #289 |
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You'll lose more than 10lbs with the wiring...you'll be surprised
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06-05-2016, 05:01 PM | #290 |
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06-05-2016, 05:36 PM | #291 |
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Does the thin wiring compromise safety - aka, not thick enough to carry amperage demand and risk of fire?
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06-05-2016, 05:37 PM | #292 | |
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'11 BMW M3 ZCP DCT | Akra Evolution | Eventuri intake | MCS 3-way | 4.6L Carbahn S65 | Zebulon Aero | AP Racing Radi-CAL BBK by Essex | 305/645-18 Pirelli DHB Porsche 992 GT3, 991.2 GT3RS, 718 Spyder instagram.com/titomanlio |
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06-05-2016, 05:38 PM | #293 |
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06-05-2016, 05:40 PM | #294 |
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The doors are the biggest part and they come from the middle of the car, so it would be the best kind of weight to lose. The rest would be fine--- a little from the front, mid and rear.
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06-05-2016, 06:27 PM | #295 |
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I guess it's also worth noting that you would NOT want to consider doing carbon fibre doors unless you had a full cage. It would not be safe at all, even with a rear 1/2 cage/roll bar. You NEED the full cage's door bars to replace the OEM safety in the doors. The carbon doors literally weigh 4-6 lbs each. No safety in those.
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06-05-2016, 08:29 PM | #296 | |
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http://www.griffinrad.com/PDFs/customTemplate.pdf
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06-06-2016, 05:37 PM | #297 | |
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06-07-2016, 12:53 PM | #300 | |
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I do Time Attack with the car. Given the current configuration, I can run in Limited Class with some organizers if I run certain tires. However, I just accept the fact that I have to run in Unlimited class if I want to run with my fastest tires. |
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06-10-2016, 11:15 AM | #301 | |
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Not 100% sure if the E90 is setup the same way...but might be worth an experiment. 5lbs of weight loss for free. If you're willing to relocate the battery, you may be able to run a smaller gauge battery cable. I calculated I can run 6ga wire for the batter by reducing the cable length by 3 ft. Less and smaller cable equals more weight savings.
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06-10-2016, 11:26 AM | #302 | |
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Your description of what you did could have been written in Russian and I would understand about the same amount! But it sounded good!! |
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06-10-2016, 06:11 PM | #303 | |
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I ran ACS a couple weeks back with NASA and holy cow what a huge difference!! The aero make a ridiculous difference there. I used to be sliding up the embankment on 1-2 now the car is so planted it feels like I could go through there full throttle. I can't wait to get out to BW, WSIR, and Chuckwalla and see how much time I can cut off my non-aero times. |
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06-10-2016, 06:19 PM | #304 | |
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Wait a minute-----no playing coy here. What was your old best and what lap time did you do with the aero at ACS? |
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06-10-2016, 07:33 PM | #305 |
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Last time out with no aero on new tires I had ran a 1:44. This time with aero on tires that had about 8-10 heat cycles on them I ran a 1:41.
i think I ran a 1:52 or 1:53 on NT01's with my M3 Last edited by dapopa9; 06-10-2016 at 07:46 PM.. |
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06-10-2016, 07:53 PM | #306 | |
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At the Speed Ventures weekend, Stephanie Cemo ran a 1:42 in her Vette and a Viper ACR also ran 1:42. The Speed Ventures guys announced in the morning driver meeting that the ACR could run 1:38 so watch out for it……hehe Anyway, if you don't mind, check back in here as you get to other tracks and let us know your results. I would love to hear what the aero does for you at the other tracks. What tires are you on these days? |
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06-14-2016, 07:59 PM | #307 |
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Running Hoosier A7's ..315/345 18's. I'm pretty limited on tire selection with those sizes. I shoot video with a GoPro but usually never take the time to watch it or take it off the SD card.
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06-15-2016, 12:15 AM | #308 |
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Had a nice day today at Laguna Seca. The SpeedSF guys were nice. Weather was beautiful---mid 50's. The sun was shining. The birds were chirping. Ah---Monterey in June. But I digress.
As I've continued my journey of driving with DSC-off, I have slowly been building my confidence. My positive experience at Auto Club a couple weeks added another piece to the puzzle. I decided I would drive Laguna DSC-off, and it worked out well. I have to say, coming out of the final turn (11) without traction control-on was a revelation. Being able to get on the gas quicker is literally a kick in the pants! Jumping out of that corner in 2nd gear, the car takes off like a rocket. Very cool. I was able to knock 2.6 seconds off my previous best at Laguna. Ultimately, I ran a 1:36.4. This continues the trend of knocking 2-3 seconds off of every personal best at every track I go to now with full aero, R1S and DSC-off. The SpeedSF guys had a Time Trial Challenge. I was able to capture the fast lap of the day. Of course, it was a 90db, so truly fast cars have a hard time going there because they're too loud. I was happy that putting the stock exhaust on allowed me to run under the limit without much hassles.....I short shift going up Turn 5, but honestly I don't even know if it's necessary. The day started on TD's with 3 sessions on them. I ran a 1:38.7, which at the time was a new personal best. I started cautiously since it had been awhile since I'd visited Laguna. I switched to brand new R1S for the second session to scrub them in. During the scrub session I ran a 1:37.2 without any trouble. Those tires really do feel fantastic when new. Third session was the Time Trial. The first hot lap was a 1:36.4. 2nd lap, I was pushing too hard and overdrove the corners. The third lap, I was running 0.3 quicker than lap 1 until the Corkscrew. For some reason, I couldn't slow down the car in time for the left turn into Corkscrew.....bummer. The aero continues to amaze me. Every track that I visit for the first time with full aero, it's just amazing how the car holds. However, it is worth noting that Turn 3 really understeers even with the aero. You just gotta be patient there. Here's the video: In the video, you'll see the car shift from 3rd gear to 5th gear while I'm in the Corkscrew. Sometimes my car does that. With a single press of the paddle, it up-shifts two gears....annoying. I believe it's the supercharger software. Last edited by dogbone; 06-15-2016 at 08:19 AM.. |
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