quietest F/I exhaust for EP3 ?

[startrack]

I need something that can take some punishment without crying too much about it...

it has to have an an ID of at least 60

Any suggestion guys?

 

[lecurie]

i think your best bet is a custom made one, you'll be able to give exact specifications you need and not settle for a close enough off the shelf cat back

 

[thetrash]

I use the spoon bpipe and standard backbox on mine. Keeps it to 102dB and I still get nearly 400bhp

 

[lecurie]

seano said the standard backbox was restrictive for him?

 

[Lottie]

I use the spoon bpipe and standard backbox on mine. Keeps it to 102dB and I still get nearly 400bhp

That will be too loud still if you want to track it Anouar (well at most tracks anyway)

 

[startrack]

Bedford has some of the most restrictive noise limit... 110dB static and 88 dB drive by.

I did 88.5dB at Bedford and that got me barred for the day.

When I say quiet I mean I need 87dB on ultra full bean drive by. that's the one that hurts on our VTec engines...

 

[thetrash]

seano said the standard backbox was restrictive for him?

Yes it was for him, but he was running the smaller rotrex without an intercooler so his exit temps were a lot higher and the N1 helped the gas flow quicker than the std one. With an intercooler the it all runs cooler so maybe it's less important to have a less restrictive exhaust. I think the std back box is pretty good. I don't know how much of a gain I'd get with a 75mm system but I know it would be LOUD!

Thats the way I see it anyway.

I doubt you'll get much of a quieter setup than the one I've got. At 5k revs we're moving a lot of gas through the exhaust,to make it quieter will start to reduce the power.

 

[G]

I would also consider a system designed like Toda with a turned down tailpipe that directs a large part of the sound downwards.

 

[Dynax]

I'd say the Toda, or perhaps try get a DC5 HKS Silent to fit?

 

[Harv]

Twin loop, Fujitsubo? JASMA stamped exhausts are pretty quiet. Toda is a good suggestion though