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  #1  
Old 06-29-2016, 01:10 AM
Hellcat94's Avatar
Oh my OM617
 
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Garrett T3 boost pressure and wastegate pressure

So I havent been able to find the info yet, to test the boost pressure on a T3 Garrett do you attach a banjo line to the back of the intake manifold where the ALDA would connect or is it somewhere near the wastegate? I need to adjust my wastegate and I cant find info on where to test my current boost pressure or my wastegate action pressure.
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  #2  
Old 06-29-2016, 05:43 AM
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yeah you can tee at the ALDA or theres a set screw on the intake manifold that the copper line fitting will attach too.
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Old 06-29-2016, 05:08 PM
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The set screw he's talking about is technically a british standard thread, but any NPT 1/8 fits perfectly.
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  #4  
Old 06-29-2016, 08:22 PM
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You say T? Does the alda need to be connected?
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  #5  
Old 06-30-2016, 09:34 AM
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You can either screw in a dedicated fitting on the manifold using the port just above the ALDA bajo bolt on the back of the intake manifold. It's BSP but is close enough to fit an 1/8NPT fitting just fine. You boost gauge probably came with a 1/8NPT fitting.


Or

You can cut the ALDA plastic line and tee that to a gauge.

Either will work
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  #6  
Old 06-30-2016, 10:28 AM
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My car the copper line was not long enough.I glued rubber hose onto it to reach gauge inside car..
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  #7  
Old 06-30-2016, 12:41 PM
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What if I just attatched a banjo bolt with a guage to the alda port on the intake, and plugged off the alda line during testing?
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  #8  
Old 06-30-2016, 02:50 PM
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Quote:
Originally Posted by Hellcat94 View Post
What if I just attatched a banjo bolt with a guage to the alda port on the intake, and plugged off the alda line during testing?
Then the ALDA will go into cutback mode and restrict your injection pump to naturally aspirated levels of fueling.

Just tee off the line, or grab a cheap 1/8NPT fitting. They're everywhere!
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  #9  
Old 06-30-2016, 05:02 PM
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S=B has it right. Really, you can tap the intake manifold anywhere - the pressure is consistent thruout the manifold (pressure/vacuum is like that) as long as you're not in a turbulent area (you're not on an intake). I don't know on your engine but on my 617 there's a metric plug toward the outside rear of the manifold. I just went to my local Parker store and bought an adaptor fitting from that metric plug to the appropriate gage line - piece of cake!

Dan
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  #10  
Old 09-14-2016, 09:08 PM
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Quote:
Originally Posted by Hellcat94 View Post
So I havent been able to find the info yet, to test the boost pressure on a T3 Garrett do you attach a banjo line to the back of the intake manifold where the ALDA would connect or is it somewhere near the wastegate? I need to adjust my wastegate and I cant find info on where to test my current boost pressure or my wastegate action pressure.
garrett AR aint got no wastegate
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  #11  
Old 09-15-2016, 09:17 AM
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Yes, they do. At least the ones equipped on the OM603s have wastegates (note photos at post 29): OM603 semi-super pump testing, fitted with Bosch 6.0mm elements


Quote:
Originally Posted by panZZer View Post
garrett AR aint got no wastegate
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