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07-07-2012, 08:43 PM | #251 | |
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Vehicle:07 FPgreen 7.37@95 WRX VF39+E85 12.0, 121mph |
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07-07-2012, 10:24 PM | #252 |
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I am a fan of the tuning theory that just got thrown around in here, but I need to weigh in on this.
Dyno numbers are arbitrary and obviously weather dependent. Everyone's measuring stick is different, but for goodness sake, shoot for a trap speed or ET in something, be it a 0-60 (I rather have to fight traction issues there, but that is me), this 50-100 time, or get into the 60-130 game. |
07-07-2012, 10:31 PM | #253 |
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trust me...juan and i are both VERY on board with the 50-100 time and the trap speed measurements. juan and i have compared numbers enough and talked tuning enough to be able to compare our graphs and things. you are right though, anybody who is looking at dyno numbers should take them with a grain of salt and use them as more of a ballpark figure than an exact number.
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07-08-2012, 01:36 AM | #254 |
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Vehicle:06 Red Ltd.Wagon Dom 1.5xtr JJ tuned |
Well, if anybody's interested, I looked at my video and my 60-90 was 3 seconds flat. It seems a lot of the videos have an uninterrupted 60-90 section without shifts, if I recall correctly.
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07-08-2012, 02:40 PM | #255 |
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mine looks really close...mine looks to be about 2.5-3 sec for me to go approx 60-100mph...really hard to tell on this computer, and my shift to 3rd only dropped me to about 61-63mph so...not exactly starting at 60mph...but close.
i can check on an actual video editing software once i get on my personal computer later tomorrow. |
07-08-2012, 02:46 PM | #256 |
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I think the smaller the window you look at, the less useful the metric becomes. It ends up being even more gearing and powerband dependent, it makes it impossible to compare against other cars, etc. I think 60-130 is probably the best benchmark, but 50-100 is decent and easier to obtain in a slow car.
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07-08-2012, 02:46 PM | #257 | |
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07-08-2012, 02:52 PM | #258 | |
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07-08-2012, 03:21 PM | #259 | |
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07-09-2012, 09:39 PM | #260 |
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Here's a link to my car, horrible video quality. It's hard to film and drive at the same time I'll try to get a better video this weekend.
Vehicle: 06 STI Motor: Built 2.5L Turbo: HTA86 Boost: 24PSI-93 octane Transmission: Stock 06 STI Redline: 7800 Upgrades: ...ID2ks, walbro 400lph aermotive FPR ...Turbotuff rods, wiseco pistons, GSC stage 2's ...Perrin rotated kit with a HTA3586 ...Perrin EL header Weight: ~3400lbs with a passenger and heavy rotas |
07-10-2012, 03:45 PM | #261 |
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Wow. Looks like about 4.3 seconds. My build is similar, just a much smaller turbo. Can't wait to put on a bigger one -- just have to finish saving for a better tranny. Nice shifting, too.
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07-10-2012, 03:49 PM | #262 |
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Join Date: Nov 2006
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Vehicle:07 FPgreen 7.37@95 WRX VF39+E85 12.0, 121mph |
Why is it so hard to tape a cell phone to the speedo console or steering wheel?
So you when from a VF39 to a HTA86? nice! |
07-10-2012, 04:03 PM | #263 |
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i agree...i love making big jumps like that. on my bugeye i went from stage 2 stock 2.0L and transmission to a FPRed E85 built 2.5L with ppg's i was literally scared to go WOT in 1st for a little while
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07-10-2012, 04:23 PM | #264 |
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07-10-2012, 05:17 PM | #265 | |
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I actually just went to make a video again on the way home from the gym that was super steady..but I was a noob and missed 4th |
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07-10-2012, 05:34 PM | #266 |
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Methinks I need to switch the last two digits on my turbo.
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07-10-2012, 06:09 PM | #267 |
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Unless you're using a more precise log with correctly calibrated speed, this list seems a bit silly.
A small error in measurement makes a big difference when you're talking about only 4 or 5 seconds. A 50-100mph run in 5 seconds could very easily have been be a 52.5-105mph run if you're speed is 5% off. So an actual 50-100 would have been around 4.75 seconds. Combine that error with a small error measuring the time and you're 5 second time could be a lot closer to 4.5 seconds......or 5.5 seconds if you error in the other direction. |
07-10-2012, 06:20 PM | #268 | |
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(But a good case in point. The error would be even greater 60-130mph. That's why I'm still a fan of a single-gear pull in a smaller range, say 60-90). |
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07-10-2012, 06:42 PM | #269 |
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No, a longer pull would be better. The measurement error should be fixed (ie. +/-0.1seconds). The longer the pull takes, the less significant (percentage wise) the error becomes.
I think we all know this isn't perfect. It's still interesting, IMO. It is easier to get than a1/4 mile time. It is more useful (for comparing speed) than a road dyno (or even a real dyno). |
07-10-2012, 06:49 PM | #270 |
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i think that if you try and make this comparison too scientific, you will not only make it completely unable to be performed by the average person, but you will also completely remove most of the fun involved. i am all for making things accurate, but i think we are all fairly aware of inaccuracies in speedometers, human errors in calculating times, etc. i mean, i don't think any of us are arguing our position on the list or going at this with a competitive mindset.
if someone feels that the possibility of inaccuracies pollute the results, they are more than welcome to move on and not participate. for those willing to overlook or accept the possibility for inaccuracies, we will gladly welcome your entry to the list. |
07-10-2012, 06:52 PM | #271 | |
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07-10-2012, 11:23 PM | #272 |
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Here's a video I made for fun with my new gears. Thought it might be interesting for some.
In this video I'm only shifting at 6.5k instead of 7k in my other video. In-gear acceleration is just as fast (as expected, nearly identical ratio's), but the extra shift to get to 100mph ends up slowing the time down by about 1/3 of a second. |
07-11-2012, 03:04 PM | #273 | |
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07-12-2012, 12:46 PM | #274 | |
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Vehicle: 2012 GS Motor: Stock Turbo: Stock Boost: 20psi can be had Transmission: Stock 6 speed Redline: 6700 Fuel: 93 Mods: K&N drop in synolimit 2012 Buick Regal GS 36k 3800? 2.0 I4 T04? 20psi? 93 270chp 295ctq NA NA NA NA 13.1 im last on the list!! http://youtu.be/i2dw2pT0qvE EDIT: started in 2nd and its a cooler day today. 10.3 http://youtu.be/aQdEq_vvW_k Last edited by synolimit; 07-14-2012 at 02:27 PM. |
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07-12-2012, 08:14 PM | #275 |
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Vehicle:07 FPgreen 7.37@95 WRX VF39+E85 12.0, 121mph |
It is a little cooler here today and I did a couple of runs. I think I beat my best time in both runs . In my second run I started on second but It knocked after shifting (no flat food shifting) it pulled a little bit of timing on third (1.5*). I was also running 11.2-11.4 AFR uptop, it is around 75* F with 60% humidity. On the first run VD says I am making 470whp Dynojet and Airboy says 440whp..
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