How do i test for boost leaks?

[crimson88]

I have an 88 turbo with intake, bic ddp, test pipe, and 3 in cat back. i boost 7/8 pounds usually, but ive been hearing that with my mods it should be higher. is this correct? and how can i test for boost leaks? ive done some searching, but i figured just asking experienced 7mgte owners on here would give me the best info.
:1zhelp:

 

[ben1984j]

http://www.supramania.com/forums/showthread.php?t=19718

 

[radiod]

If you would have looked through even a couple threads on the front page you would have found this thread which had that link within the first page...:3d_frown:

Please try and search the forum a bit more thoroughly so we don't find end up just repeating ourselves over and over and over.

And just FYI, I have similar mods on my car and I'm making 12psi (+ fuel cut :icon_conf). I do have a 57-trim CT26 and a 2.5" IC pipe kit too though.

 

[figgie]

radiod

instead of posting that the link you did, you should have posted to the link you (and that benj posted prior) posted in that thread.

DIY Boost Leak tester

don't make people run around. Be direct with the answers.

 

[crimson88]

thanks guys, i tried searching a bit but guess i didnt search hard enough. :nono:

 

[Boosted516]

If you would have looked through even a couple threads on the front page you would have found this thread which had that link within the first page...:3d_frown:

Please try and search the forum a bit more thoroughly so we don't find end up just repeating ourselves over and over and over.

And just FYI, I have similar mods on my car and I'm making 12psi (+ fuel cut :icon_conf). I do have a 57-trim CT26 and a 2.5" IC pipe kit too though.

your making 12psi off the wastegate? im also pushing 7-8 i thought thats what i was supposed to lol.

 

[crimson88]

my car pushed 4 lbs when i got it. i put in one set of washers which bumped it up to 5, then my mods have made it increase to 7/8. should i just shim the wastegate more? havent dont the boost leak test yet. just had another question. thanks.

 

[ben1984j]

my car pushed 4 lbs when i got it. i put in one set of washers which bumped it up to 5, then my mods have made it increase to 7/8. should i just shim the wastegate more? havent dont the boost leak test yet. just had another question. thanks.

Only 4psi originally? You must have a boost leak, further shimming of the wastegate would just be a band-aid for the real problem (and not a good idea)

 

[crimson88]

Only 4psi originally? You must have a boost leak, further shimming of the wastegate would just be a band-aid for the real problem (and not a good idea)

it was all original when i got it. i just figured that the wastegate spring had weakened like ive heard about.

 

[ben1984j]

it was all original when i got it. i just figured that the wastegate spring had weakened like ive heard about.

Yeah that is possible actually (should have thought of that since I had the same thing happen to me) but from what I've seen that's much less common than having a boost leak...

You can test the wastegate actuator though, then you will be able to rule out (or pinpoint) your wastegate as the cause of the problem. It's not hard, and the procedure is in the TSRM...
http://www.cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?S=TC&P=7