Plugs for silent thunder (1992 -on newer style)
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Plugs for silent thunder (1992 -on newer style)
New to me 1993 336 is going in the water this week. The silent thunder exhaust has four drain plugs that go in the underside of the silent thunder unit. Should these stay plugged or should the plugs come out for more noise and maybe more performance? Has anyone experimented with this?
#2
I took mine out
I removed the plugs from my 353 2001 fastech it did not
give anymore performance but it was loader.
this year i removed and put Eddie Marine switchable tips on
here is a photo with platform off. before tip install
give anymore performance but it was loader.
this year i removed and put Eddie Marine switchable tips on
here is a photo with platform off. before tip install
Last edited by causin trouble; 07-13-2007 at 11:39 AM.
#3
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I've tried mine both ways and didn't see ant difference in speed. But then I'm only running a single SBC not twin BBC's.
From what I under stand is that the water flow thriugh the rear area is used to keep the section coll. Hot exhaust gasses could damage the fiberglass baffles.
From what I under stand is that the water flow thriugh the rear area is used to keep the section coll. Hot exhaust gasses could damage the fiberglass baffles.
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Re: I took mine out
Originally posted by causin trouble
I removed the plugs from my 353 2001 fastech it did not
give anymore performance but it was loader.
this year i removed and put Eddie Marine switchable tips on
here is a photo with platform off. before tip install
I removed the plugs from my 353 2001 fastech it did not
give anymore performance but it was loader.
this year i removed and put Eddie Marine switchable tips on
here is a photo with platform off. before tip install
Causin Trouble, How much work was the conversion to the eddie marine switchables? I am contemplating droping the box on my 312 to do the same thing, The eddies look to be a little less money then the teagues, did you see any other results droping the silent thunder? Speed? RPM's? Thanks, Jeff
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Re: Plugs for silent thunder (1992 -on newer style)
Originally posted by powerguy
New to me 1993 336 is going in the water this week. The silent thunder exhaust has four drain plugs that go in the underside of the silent thunder unit. Should these stay plugged or should the plugs come out for more noise and maybe more performance? Has anyone experimented with this?
New to me 1993 336 is going in the water this week. The silent thunder exhaust has four drain plugs that go in the underside of the silent thunder unit. Should these stay plugged or should the plugs come out for more noise and maybe more performance? Has anyone experimented with this?
However, this could be an issue if you have large cut-outs in the bottom of the platform. Those would have been put there by a previous owner, Formula didn't do that.
As for running with the small plugs out, it adds a bit more noise since the water level in the platform a is bit lower. But, I've never experienced any performance gain form it.
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Re: Plugs for silent thunder (1992 -on newer style)
You should not notice any performance difference with or without the plugs in or out, box or no box. That's the beauty or Silent Thunder Exhaust, less noise with no loss of performance. Something I have seen happen though. Many who have cut larger holes on their box to drain even more water have been known to have problems with the box literally being rattled to death. The less water there is in the box causes excess vibrations and the box ends up making more noise than the exhaust does. If you want lots more noise, take the box off and put some tips on the transom. With the box in place, it will decrease noise levels 8-12 decibels from strait thru-hull exhaust noise.