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.
have a 1981 Mercedes-Benz w123 200 that I used to ride with my Dad before he passed away. I got used to how loud it is through the years and thought it was like that because it's an old car and cars from its age can't compete with modern vehicles, etc.
Anyways, yesterday I rode with one of...
Long-time lurker here. This might be my first post!
anyway I am trying to replace all the seals on my coupe sunroof (1982 230ce) and am looking for a bit of help;
I know the sedan/saloon seals won’t fit so I am aware I can’t just buy a standard w123 sunroof seal replacement set from eBay...
I have a well used but strong running '81 300D with 210k miles. She has gone through a couple owners so I can't speak specifically to the quality/frequency of the maintenance but I know between the previous owner and I, over the past 50k miles there have been regular 3000 mile oil/filter changes...
My water pump is seized and needs replacing but I cannot get it out of the housing.
I have had it submerged in vinegar for the last two days to try and break down any rust and free it, but it just wont budge.
Anyone have any suggestions?
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