external wastegate screamer pipe... LEGAL????

[92mr2paddy]

ive just bought a ct20b, hehehe going to external it plus a few other mods, but i was wondering weather i should plumb back the wastegate into the exhaust or have it as a screamer pipe, sounds cool, but i dont know if its legal,, plus. wouldnt flames come out of it??
some 1 let me know
cheers pat

[postfach]

its legal as long as it terminates in a position where the outer end of the exhaust pipe isn't directly under the passenger compartment

and it can't be too loud

[edited out to remove possibly untrue information]

read http://www.lvvta.org.nz/Engine&Drive-tr ... ions09.pdf section 2.3(9)

[fivebob]

and you won't get away with it coming out anywhere in the engine bay

Not that it's a good idea, but according to the regulations I can't see why it wouldn't be allowed for an engine that is behind the driver. Am I missing something?

[postfach]

and you won't get away with it coming out anywhere in the engine bay

Not that it's a good idea, but according to the regulations I can't see why it wouldn't be allowed for an engine that is behind the driver. Am I missing something?

After reading it a second time I noticed that I mis-read it a little bit and thought the part at the top of page 11 was still related to the exhaust section. I glanced at the paragraph and saw something about exhaust heat and hoses and thought I was reading that the exhaust should exit a safe distance from hoses and the like (which IMO is still a good idea). I'll be more thorough next time.

[Crampy]

and it can't be too loud

Are there any screamers that aren't loud???

[92mr2paddy]

sweet, a screamer pipe it is then, lol ill just have it end somewhere near the bottom off the car near the exhaust,, cheers guys

[AE82 FXGT]

I though screamer pipes were illegal fullstop?
Because it's venting exhaust, it can't be under the cabin or before the doors etc...

[gleem]

yeh its illegal unless it vents out behind the passenger or something along those lines so it would be legal in a mr2, so if you have a screamer in the engine bay thats venting near other engine components what type of damage could it do, just melt things ?

[thaphatty]

so if you have a screamer in the engine bay thats venting near other engine components what type of damage could it do, just melt things ?

hmmm, let me think, yes?.

but then again you wouldnt point it at shit that melts would you?

[vvega]

and you won't get away with it coming out anywhere in the engine bay

Not that it's a good idea, but according to the regulations I can't see why it wouldn't be allowed for an engine that is behind the driver. Am I missing something?

i have them on my mr2 (though i dont have a warrent on it yet)
vents out teh top of the cover for the fflame effect...lol

from my understanding in a mr2 its becomes purely a volume issue
and on a ct20b your screamer shouldnt open on a free rev...though mine dose...dammit (i dont have a ct20b)

v

[92mr2paddy]

mmmm so they are illegal,, but in an mr2 they ok since it behind the driver... lol yes of course i wouldn't point it to the radiator hose for example, hahahah.

coming out the bonnet??? really?? flame effect (lol)

all this is still awhile away but i will let you know when i get round to doing all this if i get a warrant with a screamer, if not.. haha ill suss that then

[vvega]

you may have to argue it but to the letter of teh law(aside form the volume) they do not contradict the rules
depends on your wof man..but even that will depend how far yoru will to take it to make a point
v

[Dell'Orto]

Just run the pipe to the end of the car, on the opposite side to the muffler, with a small muffler on it. It'll be legal as and oughtnt be too loud.

[Crucible]

Just remember its entirely upto the inspector, differant inspectors have differant opinions. Most older mechanics I know wouldnt even know what a screamer pipe is or for that matter an external wastegate and thats the truth.

If you're worried plumb it back into the exhaust with a flexi "bridge" pipe that can be removed after its been through a W.O.F, this may not be possible with some setups of course but its one way around the problem.

[vvega]

Just remember its entirely upto the inspector, differant inspectors have differant opinions. Most older mechanics I know wouldnt even know what a screamer pipe is or for that matter an external wastegate and thats the truth.

If you're worried plumb it back into the exhaust with a flexi "bridge" pipe that can be removed after its been through a W.O.F, this may not be possible with some setups of course but its one way around the problem.

no its not......
if they deside to make up the rules as they go along thats illegal
thats why the guidlines are published to ensure that you can see for yourself
if i got turned down just for having them..not for the noise...id write a letter and have it dealt with

[Crucible]

Just remember its entirely upto the inspector, differant inspectors have differant opinions. Most older mechanics I know wouldnt even know what a screamer pipe is or for that matter an external wastegate and thats the truth.

If you're worried plumb it back into the exhaust with a flexi "bridge" pipe that can be removed after its been through a W.O.F, this may not be possible with some setups of course but its one way around the problem.

no its not......
if they deside to make up the rules as they go along thats illegal
thats why the guidlines are published to ensure that you can see for yourself
if i got turned down just for having them..not for the noise...id write a letter and have it dealt with

yes I agree and Im fully aware of that.

but not all inspectors will take time out to go look up sh*t in a WOF manual, there can be alot of downtime doing that. Its there for referance yes, but most will make an "on the spot decision" weather an item is safe or not.

Im just saying that a few inspectors out there wouldnt know what they are looking at so wouldnt even pick at it for a wof. I had an old boy at work look at my external the other day and say "ferk thats a big psssssh valve", he was refering to a BOV, I was like hmmmm

so its got to make you wonder.....

[92mr2paddy]

hahah, yes thats tru,, da guy that did my cert didnt even know what the turbo looked like!! f**kn noob, he gave me heaps of problems too, as for the external i though about just plumbing it back into exhaust, why use a flexi though??

"ferk thats a big psssssh valve",

haha

everythings is solid, manifold, external, turbo, downpipe, flexi only after downpipe so if you plumbed it back before the flexi you wouldnt need a flexi for the external exhaust line??

[flygt4]

ive had mine externally venting since i got it 2 years ago. never failed a wof yet. just use a discreetly venting dumpipe for the gases.

i have heard of people having issues trying to vent back into the exhaust and there being too great a restriction, causing boost spiking etc.

[DFECTED]

FYI what you are all on about is externally venting the wastegate.

A screamer pipe comes off the wastegate (external or factory), seperatly running parallel to the exhaust and rejoing it a meter or so further down the system, effectively bypassing the 'turbulance' straight after the turbo (screaming past) which can decrease the flow out of the wastegate at full noise.

They were doing this on mitsi's quite a few years ago before the external wastegate craze came along to help stop boost creep.

[Dell'Orto]

he gave me heaps of problems too, as for the external i though about just plumbing it back into exhaust, why use a flexi though?? verythings is solid, manifold, external, turbo, downpipe, flexi only after downpipe so if you plumbed it back before the flexi you wouldnt need a flexi for the external exhaust line??

Nope, the rush of gasses that go through the pipe when it opens will cause it to expand, then contract. If its solid mounted, it'll crack fairly quickly.