Silent Thunder removal on newer FasTechs

rhsj2006 · 12-09-2006, 02:04 PM

I searched and reviewed the (many) previous threads on ST removal and while I found alot of great information and pics on removal of the ST box which also doubled as a swim platform (like the SR series), I didn't see much on removal of the non-integrated ST. Does anyone have details and pics of a newer FasTech with this mod?

I'm very interested in seeing how it looks and understanding what is involved for me to do this to my 2003 292. I have the Captians Call switchable exhaust (which I like) if that makes any difference in the mods for exhaust tips, routing, etc.

Any help is greatly appreciated.

Rippem · 12-09-2006, 03:59 PM

now you see it...

Rippem · 12-09-2006, 04:00 PM

now you don't...

Magicfloat · 12-09-2006, 04:03 PM

On Fastechs the look is exactly the same,all you are doing is removeing the lower pan,unlike the older boats. Starting in 06 the pan is eliminated ,they are using Corsa mufflers to keep the sound down. With Capts Call you have an ideal situation,you can go to extremely quiet to loud,as there are no mufflers in the silent thunder thru hull tips like 06 boats. However,you MUST buy 4 rubber flappers to install on the existing tips to eliminate water ingestion. They are cheap, available at most dealers(or Trick Marine) Just be aware that with the pan removed and Capts Call open,you may be illegal sound wise. Of course you can always hit the CC switch

Magicfloat · 12-09-2006, 04:08 PM

Rippem went the extra mile with new mufflers tips,a nice touch. Now he can go from very quiet to kind of quite and be legal both ways

I'm just saying you don't have to do that if you spend a very few bucks on flappers and don't mind it loud when open. Rippem's mods,while more costly.are pretty much what is the factory system now,and is a nice setup

Rippem · 12-09-2006, 04:09 PM

or find some used transom mount Corsa's to replace the raw stainless stock tips like I did. They are plentiful as take-offs and inexpensive.

Robert's right in that getting rid of the box is easy and cheap if you can do "open" exhaust. with smallblocks it can't be too loud.

rhsj2006 · 12-10-2006, 12:59 PM

Rippem, thanks so much for the great pics - Impressed me enough that I'll be doing this asap. I think I'll install straight tips w/ flappers to see how loud it is, move to the Corsa setup if it sounds like it might be trouble for me.

Robert, thanks for your comments as well.

OSO absolutely rocks.

Magicfloat · 12-10-2006, 01:32 PM

Let me clarify,you don't have to install straight tips,they are already there inside the Silent Thunder. Just clamp on the low cost flappers on the existing tips and evaluate if it's too loud before you spend the money and time on the Corsa mufflers.Like Rippem said,the small blocks may be OK on noise.

PhantomChaos · 12-10-2006, 10:11 PM

See it........

Now you don't........

rhsj2006 · 12-11-2006, 01:31 AM

Nice boat, Phantom, and thanks for the pics. I can't quite tell from the 2nd photo - Did you add mufflers or are those the factory tips with added flappers?