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-   -   What is the purpose of the intake manifold brace? (https://www.miataturbo.net/general-miata-chat-9/what-purpose-intake-manifold-brace-34029/)

Braineack 04-16-2009 11:45 AM

lol at weight savings.

Turbo_4 04-16-2009 11:47 AM

Honestly, I thought I remembering reading that the piece had something to do with helping with vibrations and what not...definetly nothing to do with the tb.

Braineack 04-16-2009 11:49 AM

I'm willing to bet the rigidity of the IM stays the same with or without the brace.

never heard of any failure directly related to it, and im sure more than 50% of the m.net members have their brace removed.

Saml01 04-16-2009 11:58 AM


Originally Posted by Braineack (Post 396690)
I'm willing to bet the rigidity of the IM stays the same with or without the brace.

never heard of any failure directly related to it, and im sure more than 50% of the m.net members have their brace removed.

I agree.

In order to help any with rigidity it needs to have tension on it, which it does not.

y8s 04-16-2009 12:31 PM

anyone measured the amount the intake manifold moves relative to the block at all RPM conditions? because it probably does a little. And aluminum SUCKS at fatigue resistance. just a mm or two of shake will break stuff fast.

1slowna 04-16-2009 01:07 PM

the dsms have a very similar brace which i removed from my car with no issues at all, however my buddy removed it and his manifold literally fell off during a hard launch.
i think the only difference was that he had his coils mounted to the manifold like they are stock and i had cops. maybe the extra weight on it did it? it left the flange on the head and was hanging from throttle cable and plug wires.

wayne_curr 04-16-2009 01:26 PM

Removed the damn thing from our integra as well when I redid the head. No issues there either.

Savington 04-16-2009 01:46 PM


Originally Posted by Braineack (Post 396690)
I'm willing to bet the rigidity of the IM stays the same with or without the brace.

never heard of any failure directly related to it, and im sure more than 50% of the m.net members have their brace removed.

And 99% of m.net members don't drive their cars hard enough for it to matter. 99% of the members here, too, for that matter. If you routinely rev your motor past 7000rpm, I'd have that thing in. I don't, but only because it doesn't fit.

Saml01 04-16-2009 02:13 PM


Originally Posted by 1slowna (Post 396721)
the dsms have a very similar brace which i removed from my car with no issues at all, however my buddy removed it and his manifold literally fell off during a hard launch.
I think the only difference was that he had his coils mounted to the manifold like they are stock and i had cops. Maybe the extra weight on it did it? It left the flange on the head and was hanging from throttle cable and plug wires.

DaNgEr To MaNiFoLd!!!!!!!!!!!

hindle 04-16-2009 04:33 PM

I removed it on all 3 of my DSMs the first time I ever had to do anything underneath it. Never looked back.

crashnscar 04-16-2009 11:53 PM

K. If you drive your shit hard, leave it in.

So everyone here, go ahead and take it out.

And how do you not see a correlation between the intake manifold brace and those bolts backing out? Leave the engineering to the engineers, not your puny little brain.

RotorNutFD3S 04-17-2009 12:16 AM

After just watching a video of Savington on the track, and him saying he doesn't have it installed, really leads me to believe that it's going to be just fine without it.

kotomile 04-17-2009 12:32 AM


Originally Posted by crashnscar (Post 397001)
K. If you drive your shit hard, leave it in.

So everyone here, go ahead and take it out.

And how do you not see a correlation between the intake manifold brace and those bolts backing out? Leave the engineering to the engineers, not your puny little brain.

I suppose there could be a resonance, hadn't thought of that. Is the theory that Emilio's TB screw backed out due to the sustained vibration?

BTW - Like I told Sav, I'm not an engineer, or an engineering student, or anything like an engineer. I don't think that makes my brain "puny", kthx. :2cents:

Savington 04-17-2009 01:24 AM


Originally Posted by RotorNutFD3S (Post 397007)
After just watching a video of Savington on the track, and him saying he doesn't have it installed, really leads me to believe that it's going to be just fine without it.

I want it in, though. I tried to leave it in but I need to redo my oil cooler lines to make it fit. If you have room for it, it should be installed.

RotorNutFD3S 04-17-2009 01:35 AM


Originally Posted by Savington (Post 397035)
I want it in, though. I tried to leave it in but I need to redo my oil cooler lines to make it fit. If you have room for it, it should be installed.

Ah. Sorry to have misinterpreted your statement then. I won't say that my motor routinely sees 7000+ RPM, but it's seen it on a few occasions. Guess I'll reconsider reinstalling it.

Doppelgänger 04-17-2009 08:33 AM

Oil filter relocation...problem solved.

Saml01 04-17-2009 10:08 AM


Originally Posted by RotorNutFD3S (Post 397007)
After just watching a video of Savington on the track, and him saying he doesn't have it installed, really leads me to believe that it's going to be just fine without it.

Savington needs to concentrate more on his brakes then intake manifold braces.

y8s 04-17-2009 11:32 AM

mine doesn't fit because of the intake manifold spacer gasket. I need to put one on the bottom of the bracket to space it out accordingly.

bhoss 04-17-2009 12:10 PM

Be careful with the intake manifold spacer and no brace. I ran this way on my NA track car. After a lot of abuse on track, three of the intake manifold studs broke, the intake started to suck in air and burned out the #4 piston.

I am now running with the stock intake gasket and the brace. The engine really moves around a lot at 7,000 rpm.

crashnscar 04-17-2009 12:13 PM


Originally Posted by kotomile (Post 397013)
I suppose there could be a resonance, hadn't thought of that. Is the theory that Emilio's TB screw backed out due to the sustained vibration?

BTW - Like I told Sav, I'm not an engineer, or an engineering student, or anything like an engineer. I don't think that makes my brain "puny", kthx. :2cents:

Talking about Saml01, and Philly, and Turbo_4. In response to your first post, we can't be sure, but it makes sense and there is a reason they increased vehicle production costs so that they could have it when designing the motor.


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