Throttle body FAIL! - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-09-2009, 01:16 PM   #21
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That's. Huge WTF right there. I've never seen that happen before
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Old 05-09-2009, 01:31 PM   #22
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That sucks man, WTF right? Well I also remember that thread and might have to do some quick searching on the subject. IF I still even have that brace laying around somewhere......it might be going back in. The brace never bothered me much, just seemed pointless. Maybe its not......
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Old 05-09-2009, 01:44 PM   #23
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Never see the shaft shear like that...consider yourself lucky that the screws/rivets didn't fail and made their way in the engine!
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Old 05-09-2009, 02:51 PM   #24
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Old 05-09-2009, 03:03 PM   #25
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Broken throttle shafts are quite common. Stock or modified engine, brace or no brace, N/A or F/I.. no discrimination. The only common denominator is frequent use at 7000rpm.

MX-5 Miata Forum - Throttle shaft breakage
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Old 05-09-2009, 03:37 PM   #26
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Quote:
Originally Posted by mrtonyg View Post
Never see the shaft shear like that...consider yourself lucky that the screws/rivets didn't fail and made their way in the engine!

then he could be cool like me:




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Old 05-09-2009, 03:38 PM   #27
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to me, it looks like a flaw, the way it snapped.
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Old 05-09-2009, 03:50 PM   #28
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Quote:
Originally Posted by Braineack View Post
to me, it looks like a flaw, the way it snapped.
Ya think?
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Old 05-10-2009, 01:43 AM   #29
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edit: I should read the thread next time.

So, what's the fix? I'm down for the preventative mod.
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Old 05-10-2009, 01:59 AM   #30
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Quote:
Originally Posted by hustler View Post
edit: I should read the thread next time.

So, what's the fix? I'm down for the preventative mod.
Sell me your car for a dollar man thats the fix.
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Old 05-10-2009, 08:59 PM   #31
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Quote:
Originally Posted by hustler View Post
edit: I should read the thread next time.

So, what's the fix? I'm down for the preventative mod.
There's a shop in Arizona that will put a billet 12mm shaft in a stock throttle body. They want $300+ for it, but that's cheaper than rebuilding a $3000 built longblock because you sucked a piece of crap through it.

edit: Just found his email. $350-400 for a one-off, plus $75 core charge. 3-day turnaround. The shop is British Car Service in Tuscon, AZ, and the guy's name is Ryal Greenwood.
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Old 05-11-2009, 06:13 AM   #32
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Quote:
Originally Posted by hustler View Post
edit: I should read the thread next time.

So, what's the fix? I'm down for the preventative mod.
micropolish the hole and threads on the shaft to stress relieve them. if it's a recurrent 7k rpm abuse that causes the failure, it's vibration-induced fatigue probably from a manufacturing defect, not a material defect. just remove the stress risers and it'll be much better.
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Old 05-11-2009, 08:37 AM   #33
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Quote:
Originally Posted by crashnscar View Post
Wrong. But have fun with your throttle body.

That brace doesn't do ****. I put 200,000 miles on my miata without it, never a problem, and I had also milled down that rod through the butterfly. I've put another 200,000 combined on 3 other Miatas I've owned with that brace removed and never any problem.
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Old 05-12-2009, 05:08 PM   #34
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You know, emilio has broken like four of those. It's all over in the power mods section on mnet..
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