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

[vvega]

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.

good man :d
the screamer needs its own flexy..... just teh way it is

[92mr2paddy]

good good, thanks for all the info guys i see how u mean with the gate opening then closing therfore cracking the pipe with time, lol never thought of it that way.

[Steve123]

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

Well, by the letter of the law, a "modified wastegate" requires a cert, so they should all fail unless certed anyway.

[vvega]

im sorry can you show me the legislation that says this

[flygt4]

pretty sure the leglisation doesnt mention wastegates at all.
the only reason they would fail would be for noise or exhaust leak, even an exhaust leak is dubious, as its only open on full load anyway. and the noise tests are done at idle , where there isnt enough load to open the w/g anyway.

[Lloyd]

Any substitution of a turbo or wastegate requires a cert. And if they want to they can fail you on that, fail you for the reduced effectiveness of an exhaust system if its too loud, or fail you on the exhaust system being constructed in a way that it can be readily interfered with.

All of this information is quite readily available.

im sorry can you show me the legislation that says this

http://www.landtransport.govt.nz/certif ... -13-v3.pdf
Note 2 at the bottom of table 13-1-1 for the wastegate thing


Most will let you through with external gate etc, but if you have an obvious screamer pipe which is going to be loud etc then I wouldn't be surprised if you didn't get a warrant

[vvega]

Any substitution of a turbo or wastegate requires a cert. And if they want to they can fail you on that, fail you for the reduced effectiveness of an exhaust system if its too loud, or fail you on the exhaust system being constructed in a way that it can be readily interfered with.

All of this information is quite readily available.

im sorry can you show me the legislation that says this

http://www.landtransport.govt.nz/certif ... -13-v3.pdf
Note 2 at the bottom of table 13-1-1 for the wastegate thing


Most will let you through with external gate etc, but if you have an obvious screamer pipe which is going to be loud etc then I wouldn't be surprised if you didn't get a warrant

ok so you need a lvv external wastegate but not for a OEM one

vented or not.......

i stand corrected

the rest of it is still arugable.....IMO
its based on how you interprit the legislation.........readily interfered with encompasses almost every exhaust system made

they board definitions with no real standard

[fivebob]

Actually it's even worse than that, the rules state that;

A modification that affects the engine and transmission must be inspected and certified by an LVV specialist certifier, unless the vehicle:
a) is excluded from the requirement for LVV specialist certification (Table 13-1-1),

So in theory anything that's not specified in that table needs to be certed. This includes such things as a boost controller, aftermarket ECU or piggyback (not sure if that's covered under rechipping of the ECU which always needs certifying). Though I suppose it could be argued if they don't increase power by 20%.

Quite how you certify an ECU is beyond me, as most people wouldn't even know how it works, and that would include a vast majority of certifiers. That begs the question that if you get it retuned to produce 20% more power than it previously had, does it need to be re-certified?

[vvega]

if your talking letter of the law ..then yes
i guess they didnt wanna be to specific i mean how else can tehy fail a car becuase they 1 dont like it or 2 didnt get paided for a pointless lvv

[sergei]

On the side note, my ST165 passed WOF with 2 external wastegates by a VINZ inspector. I don't see why externals should have LVV if they are plumbed back. Mine are plumbed back BTW. Wastegates do not increase horsepower, they infact limit it. I don't see why it would need LVV.

[92mr2paddy]

mmm about needin g a cert for ecu or bigger turbo etc, when i got my engine conversion certed i asked the guy if i was to change turbo or computer, rasie boost etc he simply said that he wouldnt bother certing it as i quote "it wouldnt change power by that much compared to standard so i see no reason it neede a cert" thats pretty much what he said, he obviously had no idea what hes talking about.. haha doesnt change it much!! lol

and ive never heard of someone needing a cert for computer change or turbo upgrade?? lol unless turboing a N/A