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Old 05-10-2009, 10:24 PM   #11 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

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Originally Posted by HLxDrummer View Post
Alright, I'm probably going to do this soon. Any tips on bending the line without kinking it?

Any tips on getting the line out of the engine bay? I've never looked at the vacuum tank but I'm assuming it's easy to get out?

Also, what did you use to plug the nipple?
I used a tubing bender. 456 Tri-Bender - RIDGID Professional Tools . . . The tubing is actually a little big for the bender, maybe = 10mm which is slightly larger than the 3/8 form in the bender, but it worked. (with a lot of force on handles). . . . Not sure if you can get one of these benders as auto parts loaner tool?? With care, you could bend it around a round object the radius you are attempting. You would have to do little at a time, and maybe use vise-grips or something to keep the sides from bulging. . . . My bend was a little ugly because I had a hard time getting the bender in position correctly. I slipped a piece of flexible black plastic tubing over the steel tube to hide the un-evenness. Looks totally stock.

I bent the tube while in the car, but I would suggest taking it out first. I had to take mine out later for other reasons, and found it is not that hard to disconnect the A/C line from firewall etc. to free this tube.

The hard lines and vacuum tank are easy to get out. It is a little time-consuming because of the other stuff that has to be removed first, but it is very obvious what has to come out, once you look at it.

I removed the nipple and replaced with metric pipe plug.
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Last edited by 3Sfever; 05-11-2009 at 12:13 PM.
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Old 05-21-2009, 06:30 PM   #12 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

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The lower hard-line on the firewall was connected to a hose near the battery area and ran to the clutch booster. . . . I cut that line, and bent the end toward the brake booster hose.
I don't get it... I understand that you're cutting the hard-line, connecting one end of the cut to the brake booster hose, but what are you doing with the other end of the cut that runs to the clutch booster. I think this is the ugly hard-line that runs across the engine bay and down past the tranny. Doesn't that impact the clutch booster now?

- Jeff
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Old 05-21-2009, 07:41 PM   #13 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

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Originally Posted by UCSB VR4 View Post
I don't get it... I understand that you're cutting the hard-line, connecting one end of the cut to the brake booster hose, but what are you doing with the other end of the cut that runs to the clutch booster. I think this is the ugly hard-line that runs across the engine bay and down past the tranny. Doesn't that impact the clutch booster now?

- Jeff
Something not obvious looking in engine bay is that there is a "T" behind the air conditioning hoses. One side goes to passenger side, on it way to the accumulator tanks under radiator. The other side goes to the clutch booster.

I cut the line (the ugly one you refer to), bent it, and attached to brake booster. . . . The other side of the "T" remains connected to clutch booster.

Attached is a crude sketch.
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Vacuum Reduction - Clutch Boost - No extra "T"-diagram.jpg  
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Old 05-22-2009, 11:21 AM   #14 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

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Originally Posted by 3Sfever View Post
Something not obvious looking in engine bay is that there is a "T" behind the air conditioning hoses. One side goes to passenger side, on it way to the accumulator tanks under radiator. The other side goes to the clutch booster.

I cut the line (the ugly one you refer to), bent it, and attached to brake booster. . . . The other side of the "T" remains connected to clutch booster.

Attached is a crude sketch.
Got it, thanks!

- Jeff
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Old 06-13-2009, 07:38 PM   #15 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

If you don't have anything to bend that line with, could you cut the hard pipe closer to the stock rubber pipe and get a longer rubber pipe and replace the stock one? If I'm reading this right the piece replaced would be the one right behind the brake fluid reservoir, so there's no check valve in it. I'm doing the vac reduction now so I want to do this at the same time and ditch the stupid brake booster. That hard line near the battery annoys the sporf outta me!

EDIT: How hard is the pipe to cut? Any special tools needed?
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Last edited by jba3; 06-13-2009 at 07:39 PM. Reason: cutting
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Old 06-13-2009, 11:55 PM   #16 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

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Originally Posted by jba3 View Post
If you don't have anything to bend that line with, could you cut the hard pipe closer to the stock rubber pipe and get a longer rubber pipe and replace the stock one? If I'm reading this right the piece replaced would be the one right behind the brake fluid reservoir, so there's no check valve in it. I'm doing the vac reduction now so I want to do this at the same time and ditch the stupid brake booster. That hard line near the battery annoys the sporf outta me!

EDIT: How hard is the pipe to cut? Any special tools needed?
I used a Ridgid tubing cutter to cut the line, but a hacksaw (or similar) would work. That would be a crude cut though, and edges probably should be filed.

You could use a longer hose to the brake booster, and not have to bend the clutch line.

I will try to explain this method in words (no time right now to do a picture). After NG, and I hopefully I have some more time, I might try to document this better.

To do what you are proposing --> there will be a stock line from driver's side of intake (with checkvalve) to the "T" hidden behind brake booster. One side of that "T" will remain stock and go to clutch booster. The other side of the "T" will be cut at some point, and a new hose will run to brake booster.

Note that the only difference to this method and mine, is that I did not have to buy any extra hose, I used the stock hose to brake booster. . . . but if you have no means to bend the tubing, a longer hose could be used.

Either way, you can eliminate the hard line that goes by the battery,

If that explanation did not make sense, let me know, and I will try again.
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Old 06-14-2009, 08:38 AM   #17 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

That makes perfect sense and is exactly what I was hoping to hear. I'll take pics of it sometime next week when I can get my hands on a camera and I'll post it up. Thanks!!!
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Old 07-12-2009, 10:56 PM   #18 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

Thanks for doing this writeup, I finally have a decent clutch again. :-)
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Old 07-13-2009, 07:49 AM   #19 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

Thanks for showing this....I will be doing this after my tranny is rebuilt
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Old 07-13-2009, 10:46 AM   #20 (permalink)
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Default Re: Vacuum Reduction - Clutch Boost - No extra "T"

so the accumulator isn't necessary? what happens if you do an emergency stop pushing the clutch and brake at the same time?
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