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.. it wasn't full code brown, but it definitely got my attention.
LOL I bet..
Originally Posted by Brainz
One other quick thought: If you're running factory intercoolers like me, do not go crazy with the test pressure. I heard some faint creaking noises from the intercoolers as I got up around 25psi and it spooked me. It's probably best to only test up to your max boost pressure or maybe a few psi higher. My guess is that 20psi is plenty high for folks on stock ICs. I don't want anyone blowing off an end tank.
I only do mine to 20 and I have the GT2RS coolers, and yes you do start to hear creaking of the various parts at that pressure..
One other quick thought: If you're running factory intercoolers like me, do not go crazy with the test pressure. I heard some faint creaking noises from the intercoolers as I got up around 25psi and it spooked me. It's probably best to only test up to your max boost pressure or maybe a few psi higher. My guess is that 20psi is plenty high for folks on stock ICs. I don't want anyone blowing off an end tank.
Great write up, building a set right now!
Thanks!!
Thank you to Brainz a couple of years later for this idea. Being stuck at home under the CV quarantine, one naturally starts to look for projects to do, and I thought this would be a good one. I wanted to share a slight evolution on the cheap boost leak tester design that does not require any lathe turning nor does it require any PVC gluing:
1-1/2 in. PVC Sch. 40 Threaded Plug
1-1/2 in. x 3/4 in. Sch 40 PVC Bushing
3/4 in. MIP x 1/2 in. FIP Brass Bushing
1/2 in. MIP x 1/4 in. FIP Brass Bushing
1/4" male air fitting
The outer threading will prevent blow-outs and will still seal up. Each of these parts simply screw into each other with no PVC glue needed. It would be more elegant if our local Home Depot had a 1-1/2 in. x 1/2, (or even a 1-1/2 x 1/4)PVC bushing, but we must make do in these challenging times.
Drill one hole in the top of the pvc plug. Screw on Schrader valve. Its for a tubeless rim so has seals built in. Use bike pump with gauge to pressurize.
I prefer the schraeder valves that thread directly in to the cap... No need to tap, the plastic is soft enough that the valve will cut it's own threads...
Hi all,
thank you for amazing forum, it helps a lot of people! I have a 997.2 Turbo and trying to see if you can help.
I have build the intercooler pipes plugs, and did a test. I am getting a big leak and found it comes from a smaller line that connects on the Y. If I remove the hose and plug the connection the system holds boost.
After some researching it seems it’s a “breather line”. Is it normal to leak air through it?? It’s quite a lot the system drains quickly to 0.5bar and the. 2-3 seconds to 0.
thank you in advance,
Ricardo
Last edited by rjpcardoso; 02-25-2024 at 10:51 AM.
Hi all,
thank you for amazing forum, it helps a lot of people! I have a 997.2 Turbo and trying to see if you can help.
I have build the intercooler pipes plugs, and did a test. I am getting a big leak and found it comes from a smaller line that connects on the Y. If I remove the hose and plug the connection the system holds boost.
After some researching it seems it’s a “breather line”. Is it normal to leak air through it?? It’s quite a lot the system drains quickly to 0.5bar and the. 2-3 seconds to 0.
thank you in advance,
Ricardo
Yes, the hose you have circled needs to be blocked off from the y-pipe to boost leak test. If you check the 991 forum, you will find a thread I started years ago about boost leak testing the 991 Turbo. I'll also look for it in a bit and post a link here when I find it.
you can either remove it and use another piece of hose for a plug, or if you have a some hose pinch off pliers, you can often just seal it in place.
Read past the first few posts until I found a better/more effective way of testing the 991 from the intercooler inlets, like the 996, but requiring a sacrificed set of boost hoses. Testing from the top also works, but tests less of the system.
Read past the first few posts until I found a better/more effective way of testing the 991 from the intercooler inlets, like the 996, but requiring a sacrificed set of boost hoses. Testing from the top also works, but tests less of the system.
07-25-2018, 05:08 PM
