6CTA Air intake Manifold Plugs

[stevenagodfrey]

Hello –

In the process of installing the SBMAR Boost pressure gauges and found an interesting difference after removing the threaded plugs from the Air Intake Manifolds. Top picture black (is port engine) and the Bottom Picture with Red Rust is the Starboard side. Both engines around 1,000 hours (year 2000). Prior to purchase (last year) the starboard aftercooler was replaced. Port aftercooler serviced last year.

Any thoughts on the difference and what would be expected inside a 20 year old air intake manifold?

Thanks
Steve

Topic

[stevenagodfrey]

EGT Boost Pressure on Misting Engine

Thought I would update this thread with the results of the EGT / Boost installation

Starboard engine with Red Rust from the past:

RPM / EGT / Boost
1200 / 500 / 0
1600 / 600 / About 5
1800 / 600 / About 10
2000 / 600 / About 12
2200 / 600 / About 16
2400 / 700 / About 20
2620 / 800 / About 28

I am concluding this is pretty good for 20 years with new aftercooler. Discovered I didn’t have full travel on port throttle linkage (thanks to Tony’s low power trouble shooting) so I need to redo that side. I get about 2960 no load. RPM confirmed with photo tach.

Appreciate all the community support.

Plan to gather data on Port side and then get tuned and made decision on pitch.

[Tony Athens]

Real simple explanation–The one engine was “misting” for, “how long”?

What’s done is done and don’t worry about the past.. Just keep all up to our protocol..

Tony

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stevenagodfrey

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