1.6 Artech SR20 200hp 1/4 mile - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-04-2013, 06:19 PM   #21
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Quote:
Originally Posted by miata2fast View Post
Totally untrue.



Too hard to have repeatable consistent results with a manual transmission. At least I never had much luck with that technique.

It's really not hard at all.... i'd suggest using e-brake instead of footbrake. You don't need to load it up hard, just a little bit.
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Old 08-04-2013, 08:25 PM   #22
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My feet can barely handle a standard launch with controlled RPM at the yellows, I wasn't about to ask them to coordinate any brake/clutch/gas dancing.

All shifts were indeed at 7000rpm, or as close as my adrenaline fueled brain could get them, there were a few 7200 shifts in there I'm sure.

The botched shift wasn't to 5th, it just wouldn't go in. There's some fluid dripping from my clutch hard line where it goes into my brand new master cylinder, I may of been loosing some pressure there. Once my wife has a minute to help me, I'll see if I can see some bubbles there and do some further investigation. Otherwise, although my times sucked, I had a blast and that little clutch line issue seems to be the only gremlin after 10 runs.
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Old 08-04-2013, 09:07 PM   #23
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Originally Posted by Braineack View Post
because slowcar.
What did you run in the 1/4?
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Old 08-04-2013, 09:13 PM   #24
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you don't want to shift at torque peak, you want to shift well past the torque peak.

*edit: and if this vd is accurate
https://www.miataturbo.net/build-thr...e3/#post922080

then shifting at redline is perfectly fine on your setup
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Old 08-04-2013, 09:15 PM   #25
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Not that that's where I shift...but in my mind unless you're really awesome at drag racing, lets say peak torque is 6,600. By the time you react, it'll be later than that.
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Old 08-04-2013, 10:47 PM   #26
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There are all kinds of theories on when you shift, but when it comes down to maximizing the full potential of your driving, you need to practice and experiment. How well the transmission shifts, driver reaction, and power all play a role.
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Old 08-05-2013, 02:01 AM   #27
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Here's the real dyno, sorry, I thought I had posted it somewhere.


The dyno was all around fail too, I wasn't driving the car, and he wouldn't start below 2400 or go to 7000. The red line was an accuracy thing though, on the last run I told him to ignore the tach and go by the laptop tach, still didn't read 7000 on the dyno.
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Old 08-05-2013, 08:31 AM   #28
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clearly you should shift at 5K. that's why you are so ******* slow.
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Old 08-05-2013, 10:09 AM   #29
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no way bro, that's overspinning it like crazy.
his torque peaks at 4500
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Old 08-23-2013, 09:05 AM   #30
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its all practice practice practice man.
get you a lil logbook and try different shift points and launchin rpm and take notes on what you did each pass. the easies and cheapest way to go faster is drive it better.
at least your at the dragsrtip. most of these 300 hp Miata **** wouldn't dare take their **** out there
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Old 08-23-2013, 02:28 PM   #31
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If I was precise enough, I'd write down my launch RPMs and results, however those first 10 passes I was too nervous to look away from the lights. I went off engine sound, and was fairly consistent after a pass or two, slowly upping the revs until my epic launch that netted me my best 60', although that's the one I botched the 2-3 shift :(

Careful with the *** word, you're in a mod's thread with the admin regularly replying and you're insulting members with 20,000 posts. After all, it was only my first visit.
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Old 08-23-2013, 02:34 PM   #32
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Quote:
Originally Posted by trikchop View Post
its all practice practice practice man.
get you a lil logbook and try different shift points and launchin rpm and take notes on what you did each pass. the easies and cheapest way to go faster is drive it better.
at least your at the dragsrtip. most of these 300 hp Miata **** wouldn't dare take their **** out there
post videos of your 300hp miata at the drag strip bro.
we all need to take notes.
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Old 08-23-2013, 03:10 PM   #33
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Why would you try different shift points? Stock rods bend above ~7200, so that's when you should be shifting.
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Old 08-24-2013, 05:12 PM   #34
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Quote:
Originally Posted by thenuge26 View Post
Why would you try different shift points? Stock rods bend above ~7200, so that's when you should be shifting.
Plus, when the stock rods bend it will lower compression ratio some so you can run more timing. Win-win!
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Old 08-24-2013, 05:22 PM   #35
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lolol win
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Old 08-31-2013, 01:46 PM   #36
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Originally Posted by 18psi View Post
post videos of your 300hp miata at the drag strip bro.
we all need to take notes.
next time to the dragstrip ill take a video. my Miata only has around 200 wheel tho.
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Old 08-31-2013, 06:46 PM   #37
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This is kind of a necrothread but wouldn't the mechanical advantage of being in a lower gear outweigh the torque loss as you near the redline? Unless your ratios are that close.

That's how I always thought of it, at least.
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Old 08-31-2013, 09:09 PM   #38
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Quote:
Originally Posted by Onyxyth View Post
This is kind of a necrothread but wouldn't the mechanical advantage of being in a lower gear outweigh the torque loss as you near the redline? Unless your ratios are that close.

That's how I always thought of it, at least.
Typically, the fastest way down the drag strip is to be at your peak horsepower in a 1:1 gear at the trap.
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