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Old 06-25-2009, 12:59 AM   #51
dhallilama
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^^ all i've ever done is cap off the PCV...
the TB won't block all the air, but it generally doesn't matter... hooked up to a compressor (even a 5 CFM P.O.S.), you'll have plenty of air.

glad to see people are using this cheap trick... i totally forgot about posting it here. i end up using the thing (or one of the various sizes i threw together) pretty often. found an intake leak on my NA b20 about an hour ago, and another on my harley yesterday... works just as great on NA motors as it does on turbo motors. whoever the first person that came up with this should have beer bought for him for life...
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Old 12-02-2009, 03:10 PM   #52
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So, just to be clear here, what hoses do you have to block/clamp? Disconnect the PCV hose on the AMM --> Turbo hose and then fill the hole? what about the ones on the cold-side? Anything over there I should be blocking off, say the one that runs to the IAC or anything?
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Old 12-02-2009, 03:21 PM   #53
orie
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Technically, none of them. The whole intake system can take pressurization, just make sure you set yer regulator at about 10-15psi or you might pop hoses off (as with raising boost). Hell, it's probably a good test before raising boost. Too high a pressure and you may damage things, such as the climate control system.

Edit: intake system excluding the PCV of course.
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Old 12-02-2009, 04:19 PM   #54
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Quote:
Originally Posted by orie View Post
Edit: intake system excluding the PCV of course.
That's what I'm talking about, how do I "exclude" the PCV system?
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Old 12-02-2009, 04:36 PM   #55
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Just block the vacuum line coming from the intake manifold and plug the PCV nipple on the airbox to turbo with something. I used an old wine cork. Thought you already knew that, sorry!
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Old 12-02-2009, 06:09 PM   #56
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Quote:
Originally Posted by orie View Post
Just block the vacuum line coming from the intake manifold and plug the PCV nipple on the airbox to turbo with something. I used an old wine cork. Thought you already knew that, sorry!
In my head I thought I should know it, but I wasn't sure...apparently I did know it, but was not confident enough to let myself know it. Thanks for the confidence booster!
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Old 03-28-2013, 08:28 PM   #57
rj740t
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Did a boost leak test on the 740 today and found some leaks.
1- leaking hks ssqv3 bov
2- leaking cold start injector O-ring
3- 2 minor leaks on intake vaccum hose
After fixing these leaks, I can't get more than 10psi on the system..
I have a 80 gal compressor.
I have Ipd cam.
I haven't done a comp test but I know compression is not so good...
Could my tired 300 000km b230ft let flow that much blowby that boost can't go over 10psi?

Last edited by rj740t; 03-28-2013 at 11:01 PM..
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Old 03-29-2013, 09:17 AM   #58
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that or from Silicone intakes.com

30$

http://www.siliconeintakes.com/produ...a42ed512991a77
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Old 08-11-2017, 05:28 PM   #59
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Just wanted to bump this great thread I came across. Everyone always fails to ever boost leak their engines, even though it's always the first thing suggested when their is problem. Myself included, but not anymore. I took my trip to home Depot and will be doing this this weekend.
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