Rolco exhaust too quiet

[Colt]

We have recently changed our boat and it has a very quiet exhaust note, too quiet I?m told. It?s a 350 chev with Rolco exhaust manifolds and Rolco hi rise?s. Is there any easy cheap way to get a bit of throatiness to the exhaust? Or are the Rolcos very quiet all of the time?   

[johnmead]

How can a jet boat be too quiet??? 

[Colt]

When you have teenager?s they want a bit of noise

[riverboater]

Put more cam in the engine, that will make it bark a bit. Or put an expanded tail pipe on the outlet. Listen to the noise a honda civic makes with a 4 inch bell on the tail pipe.

[JohnR]

Put more cam in the engine, that will make it bark a bit. Or put an expanded tail pipe on the outlet. Listen to the noise a honda civic makes with a 4 inch bell on the tail pipe.

Haha put more cam in it,  top up the exhaust fluid while you at it,

[mohawk]

rolco pipes are abit restrictive arent they ... i looked at some when i did my ls1 and the advice was run like hell ..

[TERP]

What size are your outlet pipes, and are they below the water line ? Mates boat has 50mm outlets and super quiet, same engine in mine but 63mm pipes and huge difference in sound, mines better ha !

[bbs 540]

Tell the kids to download  a V8 noise app and stream it through the earbuds they are probably wearing. save yourself a fortune.

[Hacky]

I bought some rolco mufflers some years ago. I found them highly restrictive and removed them after a very short time and then made my own mufflers which worked well and had very little restriction.