[How to] Install an aftermarket boost gauge

Write ups and tutorials for maintenance and modifications.

[How to] Install an aftermarket boost gauge

Postby Gary » Wed Jun 01, 2005 11:59 am

What you need:
1) A mechanical boost gauge.
I'm using an Auto Meter® Ultra-Lite 2-1/16" (# 4301) comes with 6ft nylon tubing and fittings.
2) 5/16" (inner diameter) rubber tube
(at least 4-inch long, mine is 1 ft.)
3) 2 Hose clamps for the rubber tube above.
4) Adapter (from any hard wear store) to connect the rubber tube
to the NPT fitting (provided with the gauge)
5) Teflon sealing tape or sealing compound.

Schematic:
Image

What to do:
1) Locate the vacuum/boost source behind the throttle body.
Image
Image

2) Remove the rubber cap. Keep it some place safe.
You might need it in the future.
Image

3) Connect the rubber tube. Use the clamp to secure it.
Image
Image

4) Connect the other end of the rubber tube to the nylon tubing
(provided with the gauge). Always use Teflon sealing tape.
Image

5) Route the nylon tube trough the fire wall.
I route it through the driver side wheel well.
Image

6) Connect the nylon tube to the meter following the gauge instruction.
Start the engine. Check for leak. Gauge should read about 17-21 in.Hg at idle.
Image

7) Connect the gauge light to the power source. I parallel it to the ash tray bulb.
The light will turn on with other interior lights. It can also be dimmed with the dimmer.
Image

8 ) Drive the car and check the boost. Now, you will realize how slow the stock boost gauge is!
Stock boost is around 7-11 psi.

Disclaimer: Do it at your own risk. I'm not responsible for any damages caused by following this instruction.
It is your responsibility to make sure that materials are fire proof and
can withstand heat in the engine compartment.
Always follow manufacturer's instructions.
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Last edited by Gary on Sat Aug 19, 2006 3:29 pm, edited 1 time in total.
93 ST185
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Postby QIK_GT4 » Thu Jun 02, 2005 2:52 am

would that be the same source i would use for my BOV vacume?
The Car:Black JDM 1990 ST185
The Mods: Whiteline Rear-sway-bar, K&N Panel, 3" Dump, HKS BOV, 2" Boost Gauge, Garret TMIC, TWM Short Shifter, Mirror Tints

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Postby Gary » Thu Jun 02, 2005 5:31 pm

QIK_GT4 wrote:would that be the same source i would use for my BOV vacume?

Yes.
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Postby QIK_GT4 » Thu Jun 02, 2005 11:16 pm

great all i need now is a BOV lol
The Car:Black JDM 1990 ST185
The Mods: Whiteline Rear-sway-bar, K&N Panel, 3" Dump, HKS BOV, 2" Boost Gauge, Garret TMIC, TWM Short Shifter, Mirror Tints

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Postby AlltracAvenger » Fri Jun 03, 2005 3:01 am

Quick question... I heard from other sources as well that you can route it through the wheel well. Any disadvantages to this setup than via the firewall, and how exactly would it be done?
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'88 ST165 #3784- Bought 05/08/15 :D
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Postby toayoztan » Fri Jun 03, 2005 12:57 pm

AlltracAvenger wrote:Quick question... I heard from other sources as well that you can route it through the wheel well. Any disadvantages to this setup than via the firewall, and how exactly would it be done?


It's just easier to go through the firewall than the wheel well.

Bryan
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Postby Rick89GTS » Fri Aug 12, 2005 2:19 am

Excellent write-up Gary :)
Should be a sticky.
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Postby RIalltrac » Fri Aug 12, 2005 11:14 am

AlltracAvenger wrote:Quick question... I heard from other sources as well that you can route it through the wheel well. Any disadvantages to this setup than via the firewall, and how exactly would it be done?


You need to remove the liner on the inside of the wheel well, then you'll see the boots that wiring goes through. You could use those same boots to get the vacuum source in/out. I did the firewall method, but plan on changing it to the wheel well option, just cleaner overall imo.
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Postby QIK_GT4 » Mon Sep 12, 2005 9:55 am

ok i installed my boost gauge just the other day and why the hell is it reading at 25 - 30 in.hg?

look i got a pic..
Image

is my car stuffed or could gauge be inaccurate?
The Car:Black JDM 1990 ST185
The Mods: Whiteline Rear-sway-bar, K&N Panel, 3" Dump, HKS BOV, 2" Boost Gauge, Garret TMIC, TWM Short Shifter, Mirror Tints

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Postby Aracheon » Tue Sep 13, 2005 6:52 pm

How much different is the install procedure for an electronic boost gauge, like a GReddy or a Defi?
Chris

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Postby Aus_GT4 » Tue Oct 04, 2005 4:31 am

Is this essentially the same write up for an st185?
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Postby toayoztan » Sat Aug 19, 2006 6:59 pm

Aus_GT4 wrote:Is this essentially the same write up for an st185?


The car used in the pictures is an ST185. In any case, this write up can be used for both the 165 and 185.

Bryan
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Postby //Zee-Roh// » Sun Aug 20, 2006 1:37 am

Both of my ports are being used....what's going on?
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Postby Gary » Sun Aug 20, 2006 2:46 am

For people without an empty port, you can just use a "T" on any vacuum line from the intake manifold.
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Postby //Zee-Roh// » Sun Aug 20, 2006 6:22 am

But it's so cramped down there....*sigh* man that's gonna take a while LOL
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