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1980 280CE; 1982 300CD
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1,250 Posts
Discussion Starter #1
This looks promising. New manifolds from a 1979 300SD next to my original equipment for the 1982 300CD.

FB
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1980 280CE; 1982 300CD
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1,250 Posts
Discussion Starter #2
I can’t wait to not reinstall all that plumbing and vacuum control.

FB
 

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'84 300d, CA version. Blue inside, silver outside. All the bells and whistles, some of which work!
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54 Posts
Nice. Junkyard? I keep my EGR on there because it's inspected every 5 years. If there are capped off ports, I might fail.
 

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1980 280CE; 1982 300CD
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1,250 Posts
Discussion Starter #4
No inspections here. And my EGR was all caked shut upon removal.

The manifolds came from the engine shop that rebuilt my motor. I think they were left behind on an abandoned rebuild.
FB
 

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1980 280CE; 1982 300CD
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1,250 Posts
Discussion Starter #5
Of course, I’ll be saving all of the parts. Just in case...

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1980 280CE; 1982 300CD
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1,250 Posts
Discussion Starter #7
Wow. I hadn’t noticed that. That’s cool- should make the car breathe a little easier.

Drive pressure- is that like measuring EPR on a Pratt?

FB
 

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94 Posts
Yes. Using a pressure gauge twice the range of boost helps determine if the turbo is working efficiently in the 1.0-2.0:1 range.
Too much boost for the amount of fuel burned and the ratio can be above 2.5:1. For the 617 with stock valve springs, ~35psi is the safe limit.

I laugh when I hear of people running 15-25+psi boost from their stock turbo, the drive pressure is insane with that antique turbo, mainly bacuse of its horrible wastegate design.
 
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