"I'm interested in fitting
"I'm interested in fitting a dry exhaust system to my GI 8.1 and was wondering if there is a blanking plate available to cut off the water between the manifolds and risers. Also would this affect the engine tuning or would the ECU adjust accordingly. I'm hoping to improve fuel economy by allowing the engine to breathe better. As it is now, the exhaust exits via 2x 4" pipes from the risers, through the transom shield and then out through a single 3" outlet at the drive. I don't profess to know more than the VP engineers but it seems restrictive for a 496 cubic engine. I guess I would need to run the raw water from the exhaust manifolds out throug a skin fitting in the hull seeing as the risers would now be blocked off."
"I'm interested in fitting a dry exhaust system to my GI 8.1 and was wondering if there is a blanking plate available to cut off the water between the manifolds and risers. Also would this affect the engine tuning or would the ECU adjust accordingly. I'm hoping to improve fuel economy by allowing the engine to breathe better. As it is now, the exhaust exits via 2x 4" pipes from the risers, through the transom shield and then out through a single 3" outlet at the drive. I don't profess to know more than the VP engineers but it seems restrictive for a 496 cubic engine. I guess I would need to run the raw water from the exhaust manifolds out throug a skin fitting in the hull seeing as the risers would now be blocked off."