Testing Tial 38mm.....????

[gsxrtalon]

Ok Im having problems boosting past 20psi and I can not figure it out. I think my Tial isnt working properly or at all. I need to test it. Is there a proper way to test it or no.

Right now I have my custom downpipe with my tial dump recirculated back into it off the car. I want to test the WG so I planned of leaving the downpipe off the car while hooking the WG back up to the MBC and then capping the UICP just before the TB(because I know there are no leaks prior to the TB) and I have a boost gauge installed on my cap to monitor boost, and pressurize the system and watch for when the WG opens. Will this hurt my turbo or anything if I pressurize the system up until the TB to make sure the WG is opening properly, also will I be able to use my BOV nipple as a boost line source for the MBC/WG? Thanks in advance. I am getting frustrated.

 

[andy4g63]

I am not sure if this is going to work,

On the other hand I just got off the phone with a Tial tech and he said, that the only way to test the WG is to put pressure on TOP port only. You'll be able to hear if WG leaks. Most likely is coming from the diaphragm of the WG.


My car boosts fine, but when gets hot, I am naving a little booost creep and I know my WG diaphragm is little torn/ basically allowing the air to escape thru the top port and this , I think is causing it to creep/. He didn't suggested to block the top port though.

 

[No_Skillz]

I want to test the WG so I planned of leaving the downpipe off the car while hooking the WG back up to the MBC and then capping the UICP just before the TB(because I know there are no leaks prior to the TB) and I have a boost gauge installed on my cap to monitor boost, and pressurize the system and watch for when the WG opens. Will this hurt my turbo or anything if I pressurize the system up until the TB to make sure the WG is opening properly, also will I be able to use my BOV nipple as a boost line source for the MBC/WG? Thanks in advance. I am getting frustrated.

No, it won't hurt your turbo or anything to pressurize up to the TB. However, why not pressurize the entire system and fix all your leaks?

Leave your BOV line unmolested. Tap for MBC somewhere close to the pressure source (IC piping as close as possible to the turbo, or on the compressor housing).

 

[gsxrtalon]

I just pressurized my wastegate to test it while off the car. I made a tester out of a spare IC pipe and a couple fittings and boost gauge.

With my Hallman MBC(side port going to the side port of WG and bottom port going to the boost source) the wastegate wouldnt open even when the boost gauge read 20+psi

Without the MBC and the boost source directly to the wastegate the wastegate started to open around 17-18psi.

So obviously my MBC isnt working properly. But while I was doing pulls trying to get boost past 20psi I ran the boost source on the car directly to the wastegate and I still couldnt get past 20psi.........I am very confused.

With all that said I think I have a boost leak somewhere past the TB(which just got rebuilt and is not leaking) and Im almost positive the intake manifold isnt leaking either??????

 

[No_Skillz]

Without the MBC and the boost source directly to the wastegate the wastegate started to open around 17-18psi.

So obviously my MBC isnt working properly. But while I was doing pulls trying to get boost past 20psi I ran the boost source on the car directly to the wastegate and I still couldnt get past 20psi.........I am very confused.

With all that said I think I have a boost leak somewhere past the TB(which just got rebuilt and is not leaking) and Im almost positive the intake manifold isnt leaking either??????

If your wastegate opens around 17-18psi with the boost source directly attached, what makes you think you can reach 20psi with the same setup when the car is on?

Do a BLT. It'll do wonders and show you stuff instead of being "almost positive."

 

[gsxrtalon]

If your wastegate opens around 17-18psi with the boost source directly attached, what makes you think you can reach 20psi with the same setup when the car is on?

Do a BLT. It'll do wonders and show you stuff instead of being "almost positive."

I am not 100% positive on how the WG works. So if the WG opens at 18psi that is all I can run? I have a brand new big blue spring in it. I adjusted my MBC all the way out/in and with it attached and testing my WG the WG wouldnt open. I was told to test the WG and see if it even opened so I did.

Like I have stated I have BLT'ed about 10times now and when testing the whole system I can only pressurize to 8psi.
When I sectioned off and tested up to the TB I got 20+psi...........so this was one of the reasons for testing the WG to check and mark that off the list of possible problems.
Obviously if I can pressurize the system to 20+psi just before the TB and only 8psi after the TB something isnt right.

It was very hard to check for leaks on the intake manifold by myself and check it good.

 

[No_Skillz]

Try squirty some soapy water all over your intake manifold. Any leaks will bubble up and make them very visibile.

And yes, whatever pressure your wastegate opens at is the pressure that you will run (unless there is something else wrong). So since your wastegate opens at 17-18psi, you should be seeing 17-18psi when you boost.

As for your MBC, are you sure it's not hooked up backwards? If it is a ball and spring type, you can take it apart and clean it. If not, throw it away and get a decent ball and spring model.