Carl Froehlich
Well Known Member
Just rolled 10 hours on N8PH. The engine seems to be settled but I?m chasing hight CHTs. This is a stock IO-360-M1B with Hartzell prop, using these stock Van?s cowl with the snorkel.
#1 runs ~10 degrees hotter than #3 and #4, and #2 runs 20 degrees hotter than 3 and 4. I did a GAMI spread and all cylinders are between 0.0 and 0.1gph, so I do not think I have an air leak or an injector that needs to be changed.
I did the standard Van?s baffles on this project. Both #1 and #2 have air dams in front. I have now three times trimmed them down chasing this issue. #1 is now about 3/4? high and #2 is about 1/2? high. The last trim of 1/2? did not do much to improve the CHTs.
Is there a secret on this setup that I don?t know about? What are other builders seeing and doing?
Carl
#1 runs ~10 degrees hotter than #3 and #4, and #2 runs 20 degrees hotter than 3 and 4. I did a GAMI spread and all cylinders are between 0.0 and 0.1gph, so I do not think I have an air leak or an injector that needs to be changed.
I did the standard Van?s baffles on this project. Both #1 and #2 have air dams in front. I have now three times trimmed them down chasing this issue. #1 is now about 3/4? high and #2 is about 1/2? high. The last trim of 1/2? did not do much to improve the CHTs.
Is there a secret on this setup that I don?t know about? What are other builders seeing and doing?
Carl