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Old 02-06-2022, 10:02 AM
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JHZR2 JHZR2 is offline
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Join Date: Jan 2002
Location: New Jersey
Posts: 4,908
Originally Posted by Alec300SD View Post
Boost gauge was not a factory optiion AKAIK.
The MityVac setup works well to verify boost on a short term basis.

To monitor boost, I have a Autometer 5904 mechanical boost gauge plumbed in 'Desert Rose'.
The gauge range is 0 to 35 psi, black background with white numbers, illuminated, with a red (not orange) almost factory look.

For the boost feed to the gauge, an ALDA banjo bolt (with a barbed fitting) from an '85 OM617A was used in place of the stock '78 ALDA banjo bolt.
Thick walled silicone vacuum hose was used to connect the gauge to the barbed fitting on the ALDA banjo bolt.

I meant the wastegate . I know a boost gauge wasnít. Iíve pumped them into cars before. On my 617 cars Iíve used them as tools to tweak the mechanical boost controllers Iíve installed (they were the rage on here 20 years ago!).

I use it as a tool and keep it tucked away. Donít want a big 2Ē gauge permanently mounted. I like the tiny 1Ē 0-15psi gauge I have in my 300cd, but I probably bought it 10 years ago and donít really remember from where!
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)
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