Strange incident - partial engine failure, then a few days later engine seems fine

[hazek]

In the Precision Airmotive manual on RSA-10 injection systems I found this(https://precisionairmotive.com/wp-content/uploads/2019/06/15-812_b.pdf):

 

This matches what the EDM data shows quite well.

[Jetpilot86]

On 8/21/2024 at 1:37 AM, hazek said:

I do admit I'm exactly sure what the graph that number is from represents, especially not because it has "Lean limit" written in the middle.

It's from here:

When I was doing work on my cruise charts, I found that Lean Limit was the equivalent of Peak TIT fuel flow. 

[LANCECASPER]

On 10/5/2024 at 6:57 AM, Jetpilot86 said:

When I was doing work on my cruise charts, I found that Lean Limit was the equivalent of Peak TIT fuel flow. 

Just be careful of the POH recommendations on TIT. You can't run the max POH numbers (1750 TIT) without burning up cylinders. Owners who have flown M20Ms for years keep TIT 1600 and under. Fuel is cheaper than cylinders, labor, TIT probes and exhaust components.

[Jetpilot86]

In the hundred hours I’ve had mine, I’ve yet to see a peak of 1600°, much less more. But then again, I keep getting limited by CHT at around 73% power in cruise, especially at the Summer ISA+ temps. I’ve already had Maxwell inspect the TIT probe, it’s good. 
 

So, yes you can run POH numbers, but for other reasons, I am stuck at 30/2200 as a max cruise for now. However, I’m not going to be surprised that it gets harder to hold those numbers above the power settings I’ve seen so far. 

[Fritz1]

1600 is the max TIT that I want to see, cruise typically 1560-1580 dF at 100dF rich on 1st EGT to peak, beware of old TIT probes, they tend to read low, 18-18.5 GPH is typically a good fuel flow at high speed cruise 30" 2300 rpm which computes to about 78% power and which is the max that you want to extract out of that engine continuously, running peak TIT per POH is only possible at lower power settings, let's say below 65% keeping TIT below 1600 and CHT below 400, this gives you long range cruise close to POH numbers

[Sanoi]

Hello to all.

One thing to see is how old are the Harnesses.