Sometimes you will not hear a distinct "leak" sound but not be able to make pressure. It also helps to do this while it is quiet. It might help to have a friend do this while you inspect the lines. While pressurizing the system, listen for leaks. intercooler pipe, or pressure is being lost in the crankcase. If you cannot build any pressure or are struggling to make the 5 psi, then you have a large boost leak or something is open, ie. Basically, if you lose 1 psi per second (1psi/s), then your system is in good shape.
#Best boost gauge wrx trial#
But this is just a trial run to see if the system will hold any boost at all.Īfter reaching 5 psi, remove the tire inflator and watch the needle for the rate of pressure loss. Air pressure will build slowly since our compressor is capped to 5 psi. Pressurized the tire valve stem on the boost leak tester using your standard tire inflator attachment (not included). Step 4: Pressurizing the System - Start with a 5 PSI Trial Run Hopefully if you are doing your own boost leak test you are familiar with your compressor. Lets see what happens first before cranking up the boost. Remove the oil cap!ĭial in your air compressor - Make sure the outlet pressure is set to a minimum level (on this compressor its the gauge on the right) For our first run to pressurized the system, 5 psi is adequate. What does this mean? Well, when you pressurize the system while boost leak testing, some of the air makes it way passed the rings and valve guides and pressurizes the crankcase which can put positive pressure on your crank and cam oil seals. ** Remove your oil cap! This relieves excess pressure in the crank case system which is especially important on the EJ motors. Step 3: Engine Safety Precautions - Oil Cap and Dialing In the Air Compressor The common areas that need to be addressed. If you missed one youll know because you wont be able to build pressure when boost leak testing. A WRX may have a slight different arrangement than the STI. Use the pic as a guide but keep in mind not every EJ motor is exactly the same. The idea is to pinch off the vacuum lines that are connected to the turbo intake pipe. It should slide over the intake pipe without much effort.
#Best boost gauge wrx install#
Remove the flex hose and install the boost leak tester just like in the pic. Again, since this turbo is a PITA to get to, its much more efficient to get to it from the turbo intake pipe. The turbo intake pipe is the plastic pipe that leads from the airbox to the turbo's inlet. Step 1: Remove Flex Hose Between MAF Housing and Turbo Intake Pipe We assume no responsibility for any injuries. **Remember when working with compressed air wear safety eyewear and be cautious.
#Best boost gauge wrx how to#
This will give you some good info on how to do your boost leak test and show you how to properly pressurize your engine. For example if your turbo boosts 14 psi stock, then you don't really want to put more than that while doing the boost leak test.Īlthough the pictures shown will be from a 2004 STI, this same steps apply to all Turbocharged Subaru EJ22/25 Engines including Impreza, Legacy, WRX, Forrester, Outback.īefore getting started be sure to read the " HOW TO BOOST LEAK TEST 101" posted in the categories section. This is a good target boost to use while pressurizing the system with the boost leak tester. You want to have a rough idea of how much you boost while driving. It will cause your turbo to operate at higher speeds that will cause overheating and bearing damage. Keep in mind a boost leak can be anywhere in the boost path, and any leak is bad news for performance and especially your turbo charger. However since we are now boosting the intake pipe which normally does not ever see boost, putting pressure through this line will require blocking off the lines that are attached to the intake pipe, otherwise the pressure you put into the pipe will just escape through these lines to atmosphere, or into the crankcase, and you will not be able to build pressure.Ĭommon leak areas on these motors is the diverter/blow-off valve flange, intercooler connections and the turbo intake pipes have been known to get damaged at the turbo inlet flange. However, since the turbo inlet pipe is easily accessible, we can perform the boost leak test more upstream from the turbo. On the Subaru EJ Engine platform, the turbo inlet is difficult to access causing the traditional way of doing a boost leak test more of a task. Boost Lea k Testing A Subaru at the Intake Pipe
0 kommentar(er)
