well i after 5 days at the cottage i was starting to get a little antsy ... so i gave my good friend todd k a call and asked him if wanted to test for boost leaks how would you go about doing it ... well after a few minutes of talking here is what we came up with 2-2inch pvc couplers 2-2 inch plugs some epoxy(used to seal the air fitting into the pvc) and an air fitting total cost $16 at lowes.....well i think of myself as a bit meticulous when i work on my car thinking that i would not find any leaks... i was wrong i found 5 huge leaks it leaked so bad that it emptied my aircompressor in 15 seconds... after an hour of so tracking them down its as tight as a drum.. i would advise doing this to your setup.. the car is a whole differnt beast i can finnaly keep my boost on top.. the only bad side 4th gear 1.5 bar the clutch starts to slip a bit around 5000rpm ill probably have to turn it down a tad let me know if you have any questions

ps

i plugged the tester into an air compressor regulated at 25 lbs the 2 rubber couplers mount onto the turbo air inlets.. you can hear all the air leaks and you rub around the hoses and clamps with your hand and when you get close the pitch changes

tim

 

Whats the amount of psi from the compressor?

 

regulated 25psi

 

Great post! I think EVERYONE should do this. I found a few major leaks myself (air fittings, intercooler couplers, pinhole in the intercooler). It makes a big difference in spool time!

Keep in mind the above is for cars running blow-thru MAFS. Stock MAF/Hitachi cars can just remove the airbox and make a plug for the intake plenum.

 

most of the leaks were repaired how? did you just have too tighen up hose bands? or replace something?

 

Tim Great little article. I can see everyone running out to get this done already LOL
Tim I had mine smoke tested and it check out.

 

yup just tightened everything down

 

Can you expalin more on the above? I want to do this soon. But want to make sure that I'm doing it correctly. Thanks!

 

How do you keep air from escaping out of the air filter? I tried an experiment with a diy pressure tester of my own design a while back, and felt like the air was leaking out the filter.

 

So, with a stock air box, you would remove air filter and box that holds air filter; and make a single plug with air fitting that fits to opening that holds the MAF? Then 25lbs pressure and look and listen for leaks? Correct?

 

Yes.

 

Well I went out to the barn and looked at the stock setup and what needs to be done. Is remove the irbox all together in cluding the housing that holds the maf sensor that will leave you with a 4.5 inch(aprox) rubber coupler I then would plug that nd pressurize the system..

 

So then you'd be plugging the throttle body as well as two plugs for the intercooler intakes and presurize it to 25 pounds and listen/feel for obvious leaks?

 

Wouldn't boost leak out of the turbos if you prrssuruzed from the airbox opening?

 

No don't plug the tb... 2 huge boost leaks were after the tb one intake runner and the vac line to the dv's