Went to the dragstrip today. (protip: don't go to the dragstrip.) - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-27-2008, 06:25 PM   #21
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that sucks. i am waiting on my 1.6 to explode. and on how i drive the car, i dont know how it hasnt happened yet
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Old 04-27-2008, 07:56 PM   #22
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im pretty sure ill blow my 1.6 rear end if drive my miata daily. thats why i dont drive it
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Old 04-27-2008, 08:16 PM   #23
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dude is this at sacramento raceway? cause i think i was there
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Old 04-27-2008, 08:37 PM   #24
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damn im pretty sure it WAS YOU at the sac raceway cause my friend GOT IT ON CAMERA:

Last edited by cjernigan; 04-27-2008 at 09:33 PM.
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Old 04-27-2008, 08:55 PM   #25
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Quote:
Originally Posted by 18psi View Post
damn im pretty sure it WAS YOU at the sac raceway cause my friend GOT IT ON CAMERA:
http://youtube.com/watch?v=NwsSXKQK5EY
Small world.

Sucks to hear Sav. I assume the plan is to avoid the dragstrip in the future?

Our diff's suck *****, even the 7's. We (anyone) need to start upgrading to the RX7 Turbo II's (8") if we (anyone) wants real drag racing.

I hope to do a few passes later this year, but will ease it off the line as a 3.636 isn't cheap, nor is a good RX7 clutch pack diff.
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Old 04-27-2008, 09:18 PM   #26
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Just putting this in here - I have an open and a welded diff and the housing if you need a replacement :P
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Old 04-27-2008, 09:25 PM   #27
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I'll also have a spare rear housing (rx7 unit) one fedex delivers my **** that's been sitting in a warehouse 20 minutes away for the last 4 days.
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Old 04-27-2008, 09:25 PM   #28
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13.7, not bad. I'm sure wheelhop killed it. Its bad.

I went to 1/4 Friday and ran best of 13.7 @ 102 and for a change nothing broke.

Good luck on the repair.
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Old 04-27-2008, 10:53 PM   #29
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I was hoping it was an open and that my failure last year was just a fluke, but now you have me worrying..

If you want another Torsen, I know Blake @ www.isellmiataparts.com just picked up a '94 with a Torsen.
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Old 04-27-2008, 10:57 PM   #30
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Quote:
Originally Posted by reddroptop View Post
Small world.

Sucks to hear Sav. I assume the plan is to avoid the dragstrip in the future?

Our diff's suck *****, even the 7's. We (anyone) need to start upgrading to the RX7 Turbo II's (8") if we (anyone) wants real drag racing.

I hope to do a few passes later this year, but will ease it off the line as a 3.636 isn't cheap, nor is a good RX7 clutch pack diff.
Nah, I'll go back. Just need to prepare the car properly. Poly diff/motor bushings/mounts to limit wheelhop, and I am going to do some research into a real rear end. If the Rx7 rear won't do it, mabye the 8" TII is the ticket?
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Old 04-27-2008, 11:09 PM   #31
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Quote:
Originally Posted by Savington View Post
Nah, I'll go back. Just need to prepare the car properly. Poly diff/motor bushings/mounts to limit wheelhop, and I am going to do some research into a real rear end. If the Rx7 rear won't do it, mabye the 8" TII is the ticket?
I am installing the same. It seems like a bandaid solution, that might not even work, it should limit wheel hop, but is wheel hop what is grenading the ring and pinion? Or is the torque simply shearing them off.

I honestly have no clue.
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Old 04-27-2008, 11:32 PM   #32
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Quote:
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First run, I wheelhopped badly at the launch, missed 5th, and still went 13.9 at 98mph.

Nice launch. You wanted a new diff anyway.
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Old 04-28-2008, 12:47 AM   #33
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Quote:
Originally Posted by Markp View Post
Nice launch. You wanted a new diff anyway.
Nah, it was a really crappy launch, like a 2.12 60".

I was hoping it was just the R&P, and I could throw a new one in with my Torsen and case and be done.

Ohhhhh, no.

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What one of the 4 parts of the Torsen are supposed to look like:
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What 1 of mine looks like:
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R&P is chipped, Torsen is totally trashed, and the case is cracked. Total writeoff.

Last edited by Savington; 04-28-2008 at 01:01 AM.
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Old 04-28-2008, 12:52 AM   #34
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Expensive night. Time for a 3.9 or 3.636.
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Old 04-28-2008, 12:54 AM   #35
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ok so the moral of the story: torsens suck for clutch dumps. the end.

It looks like you chewed an internal torsen gear, the diff froze, and then ripped the meatball right out of the bearing retainers. ouchie.
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Old 04-28-2008, 01:14 AM   #36
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Yeap, same thing that happened to ApexOnYou, torsen died and took the rest with it. That sucks. Well, I'm definately scratching torsen off my list. Welded diff for me. What are you going to do Sav? I think a welded open diff would be cheap and super strong if it's welded up right. And I hate your for having a 2.1 60' time.
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Old 04-28-2008, 01:29 AM   #37
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Why not just install a Ford 8 or 9 inch? Arent they supposed to be indestructible?

Perfect for drag racing, and a live axle vs IRS is moot when it comes to track racing.
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Old 04-28-2008, 01:46 AM   #38
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Our 7" differential isn't the weak link IMO. Well, it sort of is. Wheel hop is what kills ****. Our diff winds up like a spring when you launch it. The front of the diff jumps up and nothing stops it. Look at how the RX7 diff is mounted. Ours needs to be supported just like that, with a brace between the frame rails holding the front of the diff. Stop wheel hop and the diff's would stop breaking.
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Old 04-28-2008, 01:51 AM   #39
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A 2.1 60' on street tires is not bad at all.

Looks like the exact same gears went on both of ours. One of those side gears went on mine, and two or three others split clean in half when the whole unit locked up. I wonder if cryo treating would help any?

And for the record, I wheel hopped for the first time the run before I broke mine too, so maybe that has something to do with it.
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Old 04-28-2008, 01:52 AM   #40
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This car is primarily a track/autocross car, but I want the ability to go to the strip, put on the R-comps, and click off some 2.0 60 foot times. Welded diffs aren't an option. I am looking into a hybrid Rx7 option, and I need to do more research into (read: someone needs to tell me about) an 8" Rx7 TII diff.

edit: the 2.1 was on NT-01s. Not drag radials, but not street tires.
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