Throttle body FAIL!
 

How does this shit happen? I was just driving and it broke.

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Do you still have the support bracket on your intake? The one in the way of the oil filter? I remember reading on here that could be a cause of it. Got me.

I once turned a throttle blade into something that resembled a taco with a N2o backfire.

No I dont and I remember that thread. I still don't see how that could possibly cause that.
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I don't see how it could either, but also remember that thread... "things that make u go hmmm"

wtf another day another problem...That sucks phil, You have a replacement?

Yeah I do. Pretty sure I have at least two somewhere.
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Good to here lol get her back on the streets!!!

did you mill that down any before? Seems to me its must have been weakened before it broke unless you are running 50-60 psi onto a closed throttle body :P

Nope, never touched the butterfly.
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It was the corvette chevrons. I've seen them cause failures like this before. They rebel against being put on a non-corvette.

So are you still going to run without it? :jerkit:

Yes, if that were the cause there would be ALOT more broken throttle bodies out there. :jerkit:
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A good friend of mine has had the same problem with TB's breaking on him a few times and I always end up replacing then. Well last weekend I was doing some routine maintenance and dressing up his engine bay i'll post a few pictures. When it finally happen to me LOL no issue I had a few BP TB spares for his turbo 1.6 setup and was back on the road in no time. All in all that problem has happen 3-4 times already. So you are not the only one who has had that weird problem happen too.

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Wrong. But have fun with your throttle body. :loser:

Can you proove otherwise? How many people have removed that brace? How many people have had broken throttle bodies?
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4 vs 4,000,000,000,000,000

maybe its this huge conspiracy and no one is admitting

lol, that must be it.
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Must be a b-series thing. I've broken a mustang TB on my brother's BP setup. But I have never broken a stock TB on my mx6, even after pushing a good amount of boost on it. And I do not have an intake manifold brace on my mx6 either.

I think Emilio or Sav has had this happened and JB Welded his next...
so do you still have the support brace?

Oh and where is the missing piece? Not in your turbo I hope?

Nothing went into the motor.
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That's. Huge WTF right there. I've never seen that happen before

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......:rly:

Never see the shaft shear like that...consider yourself lucky that the screws/rivets didn't fail and made their way in the engine!

From Emilio's blog

Behind the wheel: broken throttle shaft

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

then he could be cool like me:

http://www.boostedmiata.com/new_miat...body_screw.jpg


http://www.boostedmiata.com/headwork...ute%20ZOMG.jpg

to me, it looks like a flaw, the way it snapped.

Ya think?

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.

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.

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.

That brace doesn't do shit. 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.

You know, emilio has broken like four of those. It's all over in the power mods section on mnet..