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.

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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1999 w140, quit voting to old, and to old to fight, a god damned veteran

The set screw he's talking about is technically a british standard thread, but any NPT 1/8 fits perfectly.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
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You say T? Does the alda need to be connected?

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

__________________
$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

My car the copper line was not long enough.I glued rubber hose onto it to reach gauge inside car..

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

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!

__________________
$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

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

garrett AR aint got no wastegate

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

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