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jeepguy1948 · 03-05-2024, 05:45 PM

Sorry, I’m at work so not sitting in front of my computer. I have had multiple experiences of power valves that don’t close completely so the motor runs very rich. These have been aftermarket valves that were part of kits from Speedway etc. If you sell the parts I want then I guess my question has been answered. I am in the process of building a pretty hot “B” motor and have not decided which downdraft or downdraft(s) I am going to use yet but I am going to be looking for some advice re jet and power valve sizes to use for the application. On the table right now for consideration are (1) 97, (1) 48, (2) 97’s, or (2) 81’s. I have all the carbs I just need to decide which way I’m going to go.

03-05-2024, 05:45 PM	#4
jeepguy1948 Senior Member Join Date: Jan 2022 Posts: 1,049	Re: Jets & Power Valves Sorry, I’m at work so not sitting in front of my computer. I have had multiple experiences of power valves that don’t close completely so the motor runs very rich. These have been aftermarket valves that were part of kits from Speedway etc. If you sell the parts I want then I guess my question has been answered. I am in the process of building a pretty hot “B” motor and have not decided which downdraft or downdraft(s) I am going to use yet but I am going to be looking for some advice re jet and power valve sizes to use for the application. On the table right now for consideration are (1) 97, (1) 48, (2) 97’s, or (2) 81’s. I have all the carbs I just need to decide which way I’m going to go.