SpeedForSale.com’s Boost Leak Tester

Product development/production and write-up/pictures by Jeremy Blackwell.

If you would like to purchase this ‘SpeedForSale.com Boost Leak Tester’, you can BUY IT HERE!

INTRODUCTION: SpeedForSale.com’s Boost Leak Tester includes a boost leak tester, and (optional upgrade) dummy plug for intercooler pipe testing. The kit was designed specifically for the 1993-98 Supra (custom sizes available.) It allows you to quickly and easily pressurize your Supra’s intake system/plenum to find any boost/vacuum leaks. You can also use the ‘blank’ block-off plug to allow you to heavily pressurize your intercooler pipes to check to make sure they don’t pop off during high boost situations.

Time Required: ~20 minutes

Tools Required:
-rachet with short entension
-10mm socket
-air compressor
-something heavy enough to hold down the gas pedal

Legal Disclaimer: LEGAL DISCLAIMER: Install this modification at your own risk! ‘Speed For Sale LLC’ will not be held liable for any damage that occurs to you or your car while/after installing this modification! This process involves working with compressed air which can be VERY dangerous! You must also make sure that the clamp holding the tester/plug in the pipe must be tightened VERY tightly, otherwise the plug may pop out and damage your car or hurt someone! Never point the tester directly at yourself!

Installation Steps:
1. The area in which you will be working is the factory air filter area (see picture #1 below.)

2. Untighted the 2 hose clamps that hold the #1 rubber intercooler pipe on and remove it (the black pipe over the air filter in the picture above.) Next, unplug and remove the Mass Air Flow (MAF) meter and air filter from the #1 intake pipe (see picture #2 below.)

3. Now, loosen the hose clamp holding the #1 intake pipe (see picture #3 below) to the aluminum turbo intake piece, and rotate the #1 intake pipe up a bit so that you can fit the ‘Boost Leak Tester’ into the end of the pipe. Tighten the clamp, ensuring that it is very snug.  If the clamp is worn out, you may need to purchase a new hose clamp at your local parts store.

4. Next, simply insert the ‘Boost Leak Tester’ into the #1 intake pipe where the MAF meter was located, and tighten the clamp down VERY tightly so it doesn’t pop off! (see picture #6 below.)

5. For lightly testing the intake system AND plenum for vacuum/boost leaks go to STEP 6. For heavily pressurizing the intercooler pipes ONLY, go to STEP 8.

6. Making sure that the car is turned OFF, put something heavy on top of the gas pedal inside the car so that it’s held at least half way open. This will allow the intake plenum to pressurize easier.

7. Using an air compressor, pressurize the boost leak tester so that the gauge shows about 5-7psi of pressure, then listen for leaks. You have to be fairly quick about finding leaks (best to have a friend help), because the pressure will bleed off after a few seconds.  If it bleeds off too quickly for you to test, simply remove the check valve in the stem coming out of the tester by rotating it counter-clockwise with a small screwdriver to allow more airflow (note: if you do this method, you’ll have to have someone hold the compressed air to the stem so it doesn’t bleed off.)  Now, simply listen for leaks around the intake manifold/throttle body, and the vacuum hoses around the stock turbos! Using a mechanics stethoscope with the metal piece taken out of the end makes finding leaks MUCH easier (see picture #7 below!)

8. If you want to pressurize the intercooler pipes to 15-20psi to make sure they don’t pop off when boosting, remove the intercooler pipe that attaches to the throttle body, and insert the ‘dummy plug’ that came with the ‘Boost Leak Tester Kit’ into the pipe where the throttle body was located and tighten the clamp VERY tightly! KEEP THIS DUMMY PLUG POINTED AWAY FROM ANYTHING THAT COULD BE DAMAGED IN CASE THE PRESSURE POPS IT OUT!! Be very careful doing this! Once you pressurize the intercooler system to the desired pressure, hold it there for 5 seconds, and then let the pressure off and you are done! If an intercooler pipe pops loose, connect it and perform another test. Good luck, and happy boosting!

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