Mech Boost gauge install

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Mech Boost gauge install

Postby Rallly » Fri Oct 02, 2015 11:31 pm

Hey, okay so the pictures in the "HOW TO" boost gauge install section are not working for me. I'm unsure of which oem vac hose I need to tee into to install my mechanical boost gauge. Also can I use a silicone or rubber hose instead of the nylon one? I bought my gauge used and there is no nylon hose.

Thanks!
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Re: Mech Boost gauge install

Postby CMS-GT4 » Sat Oct 03, 2015 1:27 am

I'll have an answer about the nylon hose by Monday. I ordered a barb to use silicone instead.
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Re: Mech Boost gauge install

Postby Rallly » Sat Oct 03, 2015 1:08 pm

Sounds good:)

quote="CMS-GT4"]I'll have an answer about the nylon hose by Monday. I ordered a barb to use silicone instead.[/quote]
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Re: Mech Boost gauge install

Postby slakeco » Sat Oct 03, 2015 2:33 pm

I'm no authority on anything mechanical, but I had the hood open already and wanted to try to help.

Image

Image

I hope this helps. If someone can confirm, that'd be helpful.
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Re: Mech Boost gauge install

Postby underscore » Sat Oct 03, 2015 5:32 pm

I'm just using whatever standard vacuum line is made of for mine, just remove a cap from one of the extra ports on the back of the intake manifold and hook up to that.
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Re: Mech Boost gauge install

Postby Rallly » Sat Oct 03, 2015 5:42 pm

Thanks man, I don't think my stock Alltrac has a BOV though?



slakeco wrote:I'm no authority on anything mechanical, but I had the hood open already and wanted to try to help.

Image

Image

I hope this helps. If someone can confirm, that'd be helpful.
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Re: Mech Boost gauge install

Postby Mr Alltrac » Sat Oct 03, 2015 8:02 pm

Highly doubt it. St205 came with a bpv (bypass valve) but neither the 165 or 185 had one.
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Re: Mech Boost gauge install

Postby CMS-GT4 » Sat Oct 03, 2015 9:20 pm

underscore wrote:I'm just using whatever standard vacuum line is made of for mine, just remove a cap from one of the extra ports on the back of the intake manifold and hook up to that.


This is the most common hook up point. I am using an unused port on the manifold, but I may be changing it after some upcoming testing. I got data from an electronic sensor and found my boost gauge is not correct.
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92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
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Re: Mech Boost gauge install

Postby underscore » Sat Oct 03, 2015 9:26 pm

What makes you say that it's incorrect? Ideally you want it to read from the same source as the sensor for fuel cut since that's the biggest worry.
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Re: Mech Boost gauge install

Postby Rallly » Sat Oct 03, 2015 11:13 pm

Okay so where is the most accurate place to tee into??
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Re: Mech Boost gauge install

Postby CMS-GT4 » Sun Oct 04, 2015 8:12 pm

underscore wrote:What makes you say that it's incorrect? Ideally you want it to read from the same source as the sensor for fuel cut since that's the biggest worry.


It reads a different vacuum and max boost as my map sensor is detecting. I looked at it, and saw that it is not zeroing when off. It rests on a few psi, which might explain why it reads low on vac and high on boost. Once I zero it, if it does not match up, I will experiment with places to hook up for readings.

On a note of the hook up, they sent the wrong size... so I will have to wait till a new one comes in.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: Mech Boost gauge install

Postby Rallly » Sun Oct 04, 2015 11:50 pm

Wrong size hose?




CMS-GT4 wrote:
underscore wrote:What makes you say that it's incorrect? Ideally you want it to read from the same source as the sensor for fuel cut since that's the biggest worry.


It reads a different vacuum and max boost as my map sensor is detecting. I looked at it, and saw that it is not zeroing when off. It rests on a few psi, which might explain why it reads low on vac and high on boost. Once I zero it, if it does not match up, I will experiment with places to hook up for readings.

On a note of the hook up, they sent the wrong size... so I will have to wait till a new one comes in.
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Re: Mech Boost gauge install

Postby CMS-GT4 » Mon Oct 05, 2015 12:11 am

Wrong size thread that goes to the back of the boost gauge.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: Mech Boost gauge install

Postby Rallly » Tue Oct 06, 2015 4:56 pm

Where else can I tee into my stock st185 celica? I had a look between the firewall and intake and only noticed 1 rubber hose coming off the intake but it's a bigger diameter hose then I am using on my boost gauge. I would like to tee into an accurate source that uses a 4mm hose. Any ideas?
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Re: Mech Boost gauge install

Postby Rallly » Wed Oct 07, 2015 10:29 pm

Any places on the throttle body?
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