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Exhaust silencers

Old 03-06-2002, 06:21 AM
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Question Exhaust silencers

I have a 2000 Stingray 230SX with a 454 Mag EFI, with exhaust silencers (the tips have baffles that swirl the water and exhaust for muffling. Not sure of the specific name of this silencer.) Anyway, I was told that removing these tips in favor for an open exhaust would net a 2-3 MPH increase of my 71MPH top end. I personally don't think the tips are that restrictive, but I want to ask first. Will it be worth the trouble and cost to change to open tips?
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Old 03-06-2002, 09:39 AM
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Ghia,

I have the same question about my Baja. It has the Corsa Quick and Quiet II system. I wanted to just pull the internals out rather than switching tips entirely. I asked this question on another board also and one guy there said not to pull out the baffles as this might allow water to enter the engine. I have external rubber flappers on my tips but I'm not sure if that is enough to keep water out when coming off of plane. I guess my question, along the same lines as yours would be, do the baffles really do all that much in keeping the water out or can I just yank them out...

Ted
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Old 03-06-2002, 09:41 AM
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2-3MPH???? from removing the exhaust tips?? No way! Its gonna sound alot better (to me anyway! ) but you wont see anything out of doing that mod. you may get a few x-tra Hp from the less restriction but not enough to make a change in speed. Especially if you are allready in the 70's. It takes more hp to go faster the higher the speed gets.
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Old 03-06-2002, 11:38 AM
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If you are talking about baffles that look like big cork screws welded inside the tips then you might be in luck. I had these in my Liberator and removed them using a sawzall with a long carbide blade to reach in and cut the welds. I picked up about 5 mph and after changing the intake ,rejetting and going up a prop size gained eight mph. If they are the corkscrew type, they are very resritictive.

This was on my boat and I agree that you might not see much on a faster boat such as yours. What to you have to lose though?
 
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