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-   -   1.6 Artech SR20 200hp 1/4 mile (https://www.miataturbo.net/dynos-timesheets-21/1-6-artech-sr20-200hp-1-4-mile-74258/)

curly 08-04-2013 01:47 AM

1.6 Artech SR20 200hp 1/4 mile
 
2 Attachment(s)
Shit times, but it was my first time, with an open, x6 heat cycled Neo Gens....and I'm sure I'll think of some other excuses.

I'm 526J, my friend in the other lane is a 300+hp FWD LSD Galant on RS-3s, in major need of some drag setup tweaking. Currently both our cars are floating between DD and full track circuit duty. Both do exceptionally well at both.

https://www.miataturbo.net/attachmen...ine=1375595253

RedCarmel 08-04-2013 08:04 AM

I kind of want to try this now.

miata2fast 08-04-2013 09:18 AM

Any idea what the car weighs?

curly 08-04-2013 11:28 AM

2150+ my 185lbs. I cut about 50-60 lbs out race trim, I didn't do any prep for this though.

thirdgen 08-04-2013 11:37 AM


Originally Posted by RedCarmel (Post 1039919)
I kind of want to try this now.

Bring it over...we can g-tech it.

concealer404 08-04-2013 11:38 AM

Does the Galant weigh about 4000lbs?

miata2fast 08-04-2013 11:39 AM

The eighth mile is what is killing you. You have enough mph to go in the 13's. My guess you will see that mph go up if you worked on your driving. It takes a little practice.

thirdgen 08-04-2013 11:48 AM


Originally Posted by miata2fast (Post 1039946)
The eighth mile is what is killing you. You have enough mph to go in the 13's. My guess you will see that mph go up if you worked on your driving. It takes a little practice.

My 1/8th mile mph was 84mph and I ran a 13.9. Look at the difference in 60' times between his 2 slips. Now look at the 1/4mil time. On the second slip, he should've beat the other cars time...why only 14.9?

curly 08-04-2013 11:52 AM

Botched 2-3 shift. I saw huge improvements over 10 runs, definitely need practice. I have no idea how to properly launch a car, much less a turbo one. Well, I do, I just can't do it.

adamiata 08-04-2013 12:07 PM

I ran 16.5 with my stock '90.

I understand that there are launch, shifting, and traction issues, but only two seconds faster for the double the power seems strange.

thirdgen 08-04-2013 12:30 PM


Originally Posted by curly (Post 1039951)
Botched 2-3 shift. I saw huge improvements over 10 runs, definitely need practice. I have no idea how to properly launch a car, much less a turbo one. Well, I do, I just can't do it.

Everybody does it differently. A line lock makes it really simple, cause you don't need to foot the brake when staging, but who has a line lock?
My technique:
Roll until staging light comes on.
Stop.
Right foot holds brake pedal and side steps throttle, left foot releases clutch enough to feel it start to grab. Yellow light before green, I slip my foot off the brake fully onto the throttle at the same time as I dump the clutch. Then it's usually wheel hop for a few shakes, when my tach his 7,000 I bang second and repeat with each gear until I cross the finish. If you set your rev limit to like 8,000rpm's, you might cross the finish in 4th. Nothing sucks more than to put it in 5th right at the finish line.

thirdgen 08-04-2013 12:31 PM

The botched 2-3 shift sucks. I've done that a pile of times...go for 3 rd and put it right into 5th.

miata2fast 08-04-2013 02:16 PM


Originally Posted by adamiata (Post 1039955)
I ran 16.5 with my stock '90.

I understand that there are launch, shifting, and traction issues, but only two seconds faster for the double the power seems strange.

LOL at ONLY 2 seconds.

I never have my foot on the brake on the line. The track should be flat enough that you will not roll when staged. For a Miata, I always come out at a high rpm whether I am driving with a power adder or not. You never ever want to bog the motor. Some excessive wheel spin is better than bogging.

Most of your practice will be learning how to modulate the throttle at launch to match the tire you are using. Once you have that figured out, then you work on shifting. You need to experiment with different rpm shift points. It takes a few passes to really nail it down as to when is the best time to shift.

I looked at a few timeslips I had, and I started to get into the 13's @ 95 MPH when I had the less than ideal 95 cylinder head. That is of coarse with a good tire. You might have a hard time going into the 13's without a tire change, but I would wager that with practice your mph will go up some. It might be enough to get you there on the tire you are currently using.

Braineack 08-04-2013 02:57 PM


Originally Posted by miata2fast (Post 1039976)
You need to experiment with different rpm shift points.

yeah, redline...

sixshooter 08-04-2013 03:07 PM


Originally Posted by Braineack (Post 1039981)
yeah, redline...

Actually, if the little turbo has run out of breath already, redline is too high to shift. An engine might mechanically hold together to 9500 rpm but stop making power at 7000.

Braineack 08-04-2013 03:17 PM

REDLINE.

concealer404 08-04-2013 03:41 PM


Originally Posted by miata2fast (Post 1039976)
LOL at ONLY 2 seconds.

I never have my foot on the brake on the line. The track should be flat enough that you will not roll when staged. For a Miata, I always come out at a high rpm whether I am driving with a power adder or not. You never ever want to bog the motor. Some excessive wheel spin is better than bogging.

Most of your practice will be learning how to modulate the throttle at launch to match the tire you are using. Once you have that figured out, then you work on shifting. You need to experiment with different rpm shift points. It takes a few passes to really nail it down as to when is the best time to shift.

I looked at a few timeslips I had, and I started to get into the 13's @ 95 MPH when I had the less than ideal 95 cylinder head. That is of coarse with a good tire. You might have a hard time going into the 13's without a tire change, but I would wager that with practice your mph will go up some. It might be enough to get you there on the tire you are currently using.

The brake is often used to just barely load up the motor so you don't shock the ever-living shit out of the drivetrain.

Probably not a big deal when only making 200hp or less.

This may also be why i have good luck with my transmissions, despite having ragged most of them at the strip.

miata2fast 08-04-2013 04:11 PM


Originally Posted by Braineack (Post 1039983)
REDLINE.

Totally untrue.


Originally Posted by concealer404 (Post 1039986)
The brake is often used to just barely load up the motor so you don't shock the ever-living shit out of the drivetrain.

Probably not a big deal when only making 200hp or less.

This may also be why i have good luck with my transmissions, despite having ragged most of them at the strip.

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

thirdgen 08-04-2013 05:02 PM

In my opinion, you should dyno and find out what rpm your torque starts to drop off at...that's the rpm where you shift.

Braineack 08-04-2013 05:10 PM


Originally Posted by thirdgen (Post 1039991)
In my opinion, you should dyno and find out what rpm your torque starts to drop off at...that's the rpm where you shift.

because slowcar.


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