feldguy

iTrader: (4)

After riding in several big turbo cars with wastegate dumps that vent to the atmosphere rather than being re-routed, I am curious, does anyone make a muffler or spark arrestor/muffler to deaden the sound of the otherwise obnxiously loud pipes?

TrinaBabe

iTrader: (3)

That is the strangest question I have ever heard. If you dont want the noise route it back into the exhaust.

evodrifter

AMS makes a recirculating wastegate dump pipe, so it joins back up with the headers, that would prolly work.

feldguy

iTrader: (4)

No, its not strange, According to several different companies, recirculating the dump in some cases causes extra back pressure on the wastgate. Having never verified it, I dont know...but for those who dont offer than type of option, this would be a good cure for it. If I find the post where Geoff says this I'll link it.

Its also an extra expense for most header prices, I figure I could make these simply and cheaply to rememdy anyone who already has a VTA wastegate dump

EVOKing8

iTrader: (6)

why not cut a whole in the dp and make a pipe and weld it up to the dump and back into the exhaust? idk if that would work...just an idea

Zeus

iTrader: (66)

I forget the optimum length, but if you reintroduce the waste gate flow far enough down stream, it is not a problem per se. I forget, but seems like it is in excess of 18" from the turbo...

feldguy

iTrader: (4)

zeus, I would imagine it should be that big a deal, but this is an alternate solution for someone who is already stuck with a manifold like that.

Sponge2.0

i know a few people that have small motorcycle mufflers.

ExViTermini

iTrader: (25)

The original Porsce 911 turbo(commonly known as a 930) had a small muffler on the wastegate from the factory. Maybe you could track down one of those or buy a replacement?

CBRD

iTrader: (60)

u could use a muffler like we use on shifter karts etc...

cb

check ebay

or a motocross muffler

TrinaBabe

iTrader: (3)

I would think that by using some sort of a muffler device you would introduce the same backpressure (Or more) than if you just sent it back into the exhaust system.

feldguy

iTrader: (4)

Good point. The idea was to see if anything exists. Its feasibility Im planning on testing on someones or my own car in a short time.

Nesiop

iTrader: (25)

I don't think he is saying put it back into the exhaust. He is saying on that like 1/2 dump tube add a small muffler on that pipe to muffle the sound but not lose the advantage of dumping.

feldguy

iTrader: (4)

Nes, correct......I guess I didnt make myself entirely clear

ExViterMini...you're not the guy who runs the GTR700 Skyline...from exvitermini.com...are you?

EVOlutionary

iTrader: (38)

My friend did this on his Mercedes 190E 2.3-16V with GT35R turbo (might be a T4, can't remember). I am not sure where he got the muffler (I think he made it), but it quieted it down ALOT! I do not believe it has caused any boost creep issues.

EVOlutionary