2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

power brake booster line?

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Old Oct 11, 2009 | 09:03 AM
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87_RX7_fc3s's Avatar
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OneThreeRotary
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power brake booster line?

I have an 87 Turbo II, I was wondering where the power brake booster line goes to?
It comes out of the Booster and goes to a hard line then it runs along the fire wall, and then i'm not sure where from there... any help?
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Old Oct 11, 2009 | 09:50 AM
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Hope this helps (this is a n/a engine but i assume it should help your search)

[IMG]<a href="http://s589.photobucket.com/albums/ss333/Jreed624/?action=view&current=SDC11564.jpg" target="_blank"><img src="http://i589.photobucket.com/albums/ss333/Jreed624/SDC11564.jpg" border="0" alt="Brake Booster Line"></a>[/IMG]
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Old Oct 11, 2009 | 10:39 AM
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Aaron Cake's Avatar
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The TII lower has a threaded port on the rear runner where a little bent pipe bolts on with a banjo bolt. That's the location of the brake booster line. Similar to the NA.
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Old Oct 11, 2009 | 10:45 AM
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OneThreeRotary
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Sorry I wasn't clear... this is for the Vacuum source to the booster?
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Old Oct 11, 2009 | 10:53 AM
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Aaron Cake's Avatar
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Yes.
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Old Oct 11, 2009 | 11:22 AM
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OneThreeRotary
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okay well I'm still not sure exactly where you mean... also the picture has no reference points so it really doesn't help.
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Old Oct 11, 2009 | 11:28 AM
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OneThreeRotary
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Really I just need to know where is an acceptable vacuum source. I Bought a 3ft length of power brake booster line so I can re-route...

(I mounted my FPR in the path of the old hard line because that was the only place I could fit it...
So I have to remount the hard line up a little higher above the firewall.)
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Old Oct 11, 2009 | 12:58 PM
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Originally Posted by Aaron Cake
The TII lower has a threaded port on the rear runner where a little bent pipe bolts on with a banjo bolt. That's the location of the brake booster line. Similar to the NA.
that's on the jdm intake manifolds. on the usdm ones it's located on the UIM.
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Old Oct 11, 2009 | 01:31 PM
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OneThreeRotary
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Thanks man you come through again for me!!!

There are a couple of nipples that look to be the right size... on up top pointing strait up... and the other strait out towards the fire wall, Does it matter which one???
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Old Oct 11, 2009 | 02:30 PM
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You have four nipples one above the other on the back. Just to the right of those is the LARGE nipple meant for the series four TURBOII brake booster.
Attached Thumbnails power brake booster line?-thegap.jpg  
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Old Oct 12, 2009 | 10:27 AM
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The booster "nipple" is actually a large pipe coming off the lower (I guess Jspec only) or upper (apparently North American) manifold. It's a pipe of about a 3/8" diameter which connects to a threaded hole in the manifold via a banjo bolt. It is the only threaded hole in that are of the manifold.

You can see what it looks like in the picture below. It is directly above the downpipe and is the black pipe connected to the lower intake with the silver clamp and S shaped hose connectd to it. This is an NA manifold so yours will be a bit different but the pipe looks very similar. I don't have a picture of a TII.

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