Second time at the 1/8th mile - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-27-2008, 06:49 PM   #1
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Default Second time at the 1/8th mile

My time was slower this time, but I was running about 14psi versus 11.5psi last time (9.0 at 84.66). All it did was make it spin second even worse, as in hopeless spinning before 4000rpm; my best time was short shifting 1st and 2nd and driving most of the track in 3rd.

ended up with a 9.20 @ 87.99

I'm happy with the mph, the ET is pretty bad, but that's to be expected. It hits the 7200rpm rev limiter at about 30 feet from the end of the track, pretty irritating. I guess I could raise the limit to 7500 and get a little closer to that magic 90mph, but it's not really worth it.

I might get a video up if I can get it on youtube.
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Old 01-27-2008, 06:56 PM   #2
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I did the crystal mod to my ecu and it only took like 15 minutes, five bucks, and it's nice to not have a rev limiter in my way. I ran a 9.38 @ 72 mph and that was a 2.47 60'. I figure I could have got in the 8's pretty easy with a better launch. Sounds like you should be in the mid to low 8's when you get your launch and traction taken care of.
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Old 01-27-2008, 08:31 PM   #3
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Originally Posted by patsmx5 View Post
I did the crystal mod to my ecu and it only took like 15 minutes, five bucks, and it's nice to not have a rev limiter in my way.
Read his sig "MSnSE spark and fuel and idle and boost control".

All it takes is 30 seconds to change his limiter... he just doesn't care to.

I personally run my rev limiter at 7500 rpm. Seems to like it up there
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Old 01-27-2008, 09:42 PM   #4
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Yeah, it definitely has the power to go a lot faster ET-wise, but I'm not gonna buy drag slicks for it so I'll just have to be a ricey MPH racer.
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Old 01-27-2008, 09:54 PM   #5
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That is still pretty stout dude. The important part is do you enjoy it? Does it do pretty well on the street? Was the track prepped up right? I bet with a nice prepped track you could pull a better ET.
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Old 01-28-2008, 02:17 AM   #6
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Yeah the track is awful. It hooks better on the street.
Here's some videos (last one is the fastest run, you can hear it hitting the rev limiter):


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Old 01-28-2008, 02:21 AM   #7
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Wow you need traction!!! Something man, that's bad. Your car has so much potential man. Wish I had that much power. Could you post up a time slip?
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Old 01-28-2008, 05:14 AM   #8
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hey posted the time earlier. I had similiar issues at a local track with the same PSI myself. You just need to find a nicer track dude.
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Old 01-28-2008, 10:45 AM   #9
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damn that's crazy - you can hear the revs rocket up as soon as the power comes on
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Old 01-28-2008, 12:51 PM   #10
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needs...mo...tire.
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Old 01-28-2008, 01:10 PM   #11
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what's funny is I also tried my 225 hoosier autocross slicks, and they didn't work as well as my 195 azenis!
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Old 01-28-2008, 01:16 PM   #12
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Do you get into 4th gear in the 2nd video? Sounds like you shift 3 times. Or am i mistaking one of the BOVs for something else?
Looks awesome, makes me want to hit up the track sometime.
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Old 01-28-2008, 01:30 PM   #13
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Originally Posted by Al Hounos View Post
what's funny is I also tried my 225 hoosier autocross slicks, and they didn't work as well as my 195 azenis!
Being cold and having super stiff sideways doesn't help with straight ahead traction.
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Old 01-28-2008, 03:27 PM   #14
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no that's just pedaling 2nd gear and then finally shifting to 3rd. you should take it out to the track. it's funny to get destroyed by mustangs but end up with a trap speed 10mph faster.

some of the other cars there were interesting... a 2jz swapped lexus SC300 was running 8.4 at about 85mph, a Jeep Grand Cherokee SRT8 with a few mods and a 75 shot was running 7.5s at 90! there was also a mazdaspeed miata with FM intake, exhaust, IC, and a hydra running 9.0 at 76.
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Old 01-29-2008, 02:20 AM   #15
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That track surface looks nasty!

Looking at the vids, im sure you would pull decent times if you ran on a better surface. You were on Azenis I take it?
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Old 01-29-2008, 02:39 PM   #16
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yep, azenis. the track is about as broken up, patched and dirty as they come.
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Old 01-29-2008, 03:48 PM   #17
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Our track is really bad also, but there is nothing else within about 150 miles. I ran 9.6s all night at 77mph about a million times last summer. All on very old 14inch pilots. I switched to 15inch azenis but about the same. I am going to get a couple 14inch street drag radials for this summer only because we go every other weekend and run all night. Its $5 and you can run again and again. Lot more fun than I thought it would be although it will never ever beat a track.
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Old 01-29-2008, 03:56 PM   #18
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I need to count the slips that I haven't lost. And all on 8-9psi with stock clutch and rear, and miserable 60foots. Best was a 2.3. Best on the civic was 2.5 with 10.3 at 70mph, with all my mphs within .2 mph. Consistantly bad, like most things I try. Good thing other people were often worse.
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