The Ford Barn - View Single Post - Exhaust cross-over pipe mystery insert

38 coupe · 06-07-2024, 05:41 AM

If you are running good thermostats I suspect you will see no difference in temperatures. JWL was performing dyno tests of an 8BA and found one of these stuck closed in the crossover pipe after initial testing. Removing it made zero difference in power or coolant temperature for the engine being dyno tested. After learning of that result I no longer worry about restrictive factory exhausts on our flathead Fords.

06-07-2024, 05:41 AM	#5
38 coupe Senior Member Join Date: May 2010 Location: South Texas Posts: 2,137	Re: Exhaust cross-over pipe mystery insert If you are running good thermostats I suspect you will see no difference in temperatures. JWL was performing dyno tests of an 8BA and found one of these stuck closed in the crossover pipe after initial testing. Removing it made zero difference in power or coolant temperature for the engine being dyno tested. After learning of that result I no longer worry about restrictive factory exhausts on our flathead Fords.