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Search: Posts Made By: lr172
Forum: Traditional Aircraft Engines 04-12-2021, 11:40 AM
Replies: 33
Views: 3,950
Posted By lr172
If he is any good, he would have measured it...

If he is any good, he would have measured it before making that statement.
Forum: Traditional Aircraft Engines 04-12-2021, 08:19 AM
Replies: 33
Views: 3,950
Posted By lr172
The standard is 200 ROP when full rich, WOT at...

The standard is 200 ROP when full rich, WOT at sea level. It is nice to have that margin for detonation prevention on Take off. You should be more worried about WOT SL than at cruise, as that is...
Forum: Traditional Aircraft Engines 04-05-2021, 10:22 AM
Replies: 33
Views: 3,950
Posted By lr172
The bowl vent is not exposed to ram air. If it...

The bowl vent is not exposed to ram air. If it was, the excess pressure on top of the fuel in the bowl would cause a rich condition, not lean. The same way that higher float settings cause rich...
Forum: Traditional Aircraft Engines 04-05-2021, 09:06 AM
Replies: 33
Views: 3,950
Posted By lr172
WOW. 50* ROP at 8000 with full rich is quite...

WOW. 50* ROP at 8000 with full rich is quite lean. seems a jet change is in order, assuming you have confirmed that the mixture cable installation is allowing the arm on the carb to go full travel....
Forum: Traditional Aircraft Engines 04-03-2021, 08:21 AM
Replies: 33
Views: 3,950
Posted By lr172
9.5 GPH at 7500' is right around or a bit higher...

9.5 GPH at 7500' is right around or a bit higher than max power (approx 75-100 ROP). I routinely run 8 GPH at 8000', which is around 20-40 LOP. Rejetting is not your answer, at least at cruise. ...
Forum: Traditional Aircraft Engines 01-31-2021, 07:57 AM
Replies: 33
Views: 3,950
Posted By lr172
The nozzle is the main jet and it is the biggest...

The nozzle is the main jet and it is the biggest contributor to how the carb matches fuel flow to air flow through the venturi. I can't say whether that swap was an increase or decrease in the jet...
Forum: Traditional Aircraft Engines 12-30-2020, 12:19 PM
Replies: 33
Views: 3,950
Posted By lr172
Hottest CHT will be at 80-100* ROP. They cool a...

Hottest CHT will be at 80-100* ROP. They cool a bit as you lean to peak and then cool rapidly when leaner than that. CHTs also drop when richer than 80-100* ROP.
Forum: Traditional Aircraft Engines 12-30-2020, 07:37 AM
Replies: 33
Views: 3,950
Posted By lr172
If you are only getting a 20-50* rise at 20" from...

If you are only getting a 20-50* rise at 20" from full rich, you have some major issues going on. I would expect at least a 150-200* rise from full rich to peak EGT at 20" Maybe less at 28", but at...
Showing results 1 to 8 of 8

 
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