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Old 05-29-2013, 03:00 PM   #141
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Quote:
Originally Posted by Pen2_the_penguin View Post
why not do what many others did and make an intake mani out of aluminum tubing?
Well, in the “Honda IM thread" there was a report someone breaking Begi aluminum tube IM.
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Old 05-29-2013, 03:04 PM   #142
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pics or it didnt happen.


I have seen thousands of successful track stories of aluminum tube manis.
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Old 05-29-2013, 04:00 PM   #143
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Quote:
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I have seen thousands of successful track stories of aluminum tube manis.
With pos BP engine which vibrates more than any engine Iíve ever seen?
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Old 05-29-2013, 04:07 PM   #144
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What about incorporating the OEM manifold support brace?
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Old 05-29-2013, 04:17 PM   #145
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Quote:
Originally Posted by 18psi View Post
What about incorporating the OEM manifold support brace?
I already have a support brace there

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Old 05-29-2013, 05:00 PM   #146
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is it recent or was the failure with it on?
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Old 05-29-2013, 05:17 PM   #147
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Quote:
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is it recent or was the failure with it on?
last failure was with brace attached

Like someone said in Honda IM thread: "I have no idea what I'm doing with my life"
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Old 05-29-2013, 05:41 PM   #148
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That brace is putting a moment on the manifold most likely. I bet your crack started at cylinder 4 with that brace on. Put another one to the other end.
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Old 05-29-2013, 05:45 PM   #149
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Quote:
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I bet your crack started at cylinder 4 with that brace on.
No, actually runner #1 was first to crack
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Old 05-29-2013, 08:03 PM   #150
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maybe the brace is too tight?

Quote:
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With pos BP engine which vibrates more than any engine I’ve ever seen?
you have a damper, right?
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Old 05-29-2013, 08:23 PM   #151
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Quote:
Originally Posted by muoto View Post
last failure was with brace attached

Like someone said in Honda IM thread: "I have no idea what I'm doing with my life"
that brace looks really weak and unsupportive.
factory one definitely bolts teh mani down a lot more and grabs most of it not just the front 1 runner
but I'm not saying it is or if that's your issue.

I dunno, just guessing here.
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Old 05-30-2013, 05:16 AM   #152
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Quote:
Originally Posted by Pen2_the_penguin View Post
maybe the brace is too tight?

you have a damper, right?
It might have been too tight. I tighten it on track and probably twist it too tight in hurry

I have 949racing's supermiata damper and mazda competition motor mounts
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Old 05-30-2013, 05:39 AM   #153
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with a brace like that I would have just twisted it till it got snug, and then a quarter turn further. Good luck dude
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Old 05-30-2013, 05:43 AM   #154
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Quote:
Originally Posted by Pen2_the_penguin View Post
with a brace like that I would have just twisted it till it got snug, and then a quarter turn further. Good luck dude

That is exactly how it is now tightened
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Old 05-30-2013, 06:28 AM   #155
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captured a very special video for this special thread

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Old 05-30-2013, 10:43 AM   #156
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Quote:
Originally Posted by 18psi View Post
that brace looks really weak and unsupportive.
factory one definitely bolts teh mani down a lot more and grabs most of it not just the front 1 runner
but I'm not saying it is or if that's your issue.

I dunno, just guessing here.
Well Iím here guessing too. After all Iím an alcoholic not a qualified engineer. I had to first break stuff to know how to build it better. Anyway, that brace is there support more of the plenum than the runner #1. That plenum section is really thick and I donít think itís going to flex. </guessing>


Next thing to do is set oil pressure warning system. With these power figures I donít expect my stock pump last long. Super Miata damper should protect oil pump but...who knows how well?... Adaptronic reads that 0-5v pressure sensor and alerts if pressure suddently drops on track. Maybe I should put another for the fuel pressure alsoÖ

ps. If any of the mods are reading. Change my thread title to ďTurbo MX-5 (I have no idea what I'm doing with my life)Ē
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Old 05-30-2013, 10:46 AM   #157
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But that brace is really just creating a moment arm because its connected the the manifold with a floppy joint. It would be ok if you connected it at the other end of the plenum the same way, or if you make a solid, stiff, 2 bolt connection with the same points you have now.
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Old 05-30-2013, 12:02 PM   #158
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I’m tired of welding and bracing that ****. I want my intake to be as my exhaust manifold. Bulletproof and sexy
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Old 06-03-2013, 08:05 AM   #159
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....Turns out it was clutch slip. It seems that FM lvl1 didn’t like 17psi so I’m back to the 15psi boost. It really didn’t come as a surprise as lvl1 is only rated for 318ft/lbs.

Any recommendations for cheap at least 380ft/lbs. rated clutch?
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Last edited by muoto; 06-03-2013 at 08:52 AM.
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Old 06-03-2013, 11:31 AM   #160
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Well the lvl2 should definitely be able to hold down more than the 1, possibly well into the 350 range. Beyond that, looks like the twin disk is what you should start eyeballing. Esp since you're tracking the car
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