The Epa Thread/Roadworthy Thread

[alr33x]

Yeh test is at 75% of peak rpm an it's gotta be under 90db

Can't remember if u fail at 90db I remember I got 89db and he re tested to try get me got 89 again winnar

[W0rp3D]

75% would be 5250.......... Are you sure?

[R31Nismoid]

It's not 75%

It's a set RPM determined by the EPA - which is more than that.

Either way, you need to be 89dB @ 4900rpm - that includes on back off/rundown. Which is usually what trips the meter.

Unless you have a stock exhaust, you'll fail.

[wht510]

My memory is hazy on this, but I thought it was around 60% of peak RPM (based on the factory limit) at 500mm at around 45 degree off axis with minimal reflective surfaces during the measurement (the meter must be away from reflective surfaces.)

Can't remember where I had this information though, so not 100% sure it's right...

EDIT: actually I thought it was 50% of max rpm...

Gotta find the EPA doc...

Edited March 8, 2012 by wht510

[alr33x]

What's redline 6k? 4700 ain't far off 75% ... either way it's a shit law lol

[W0rp3D]

7k

[Fattony]

Hey guys, just a quick 1, are semi- slick tyres roadworthy? Cheers.

[R31Nismoid]

If they are road legal ones, then yes.

You need to find out if they are DOT approved etc.

[Fattony]

Ok, so ur tellin me theres a chance!

Ill have a look when i receive em. Ta.

[W0rp3D]

what make and model are they?

[Fattony]

They r kuhmo ku36's. The rears have bout 40% tread left, fronts 80%. do u reckon they'd b meaty enuff 4 a track day?? If so, id keep em off the road til then.

[R31Nismoid]

Hate to break it to you.. KU36s are not a R-comp / semi-comp item.

They are no different to a Bob Jane all-rounder in terms of legality.

[Fattony]

Thats a beauty. Thanx for the info, looks like the wheels n tyres r goin on earlier than expected.

Cheers.

[W0rp3D]

for the record the db test for a 33 is @ 4800rpm and needs to be 90db or lower, mine was 92.

[antz69]

guys just got done by EPA , waiting for a letter in the mail to make it official,. epa picked Power FC and noise,

anyone know how i might cop it? Thanks in advance!

[R31Nismoid]

In a letter, just like everyone else?

It'll be a full EPA test if they've noted down ECU etc. Time to take it back to stock.

[antz69]

Well he didnt give me anything on the spot, saying i would most likely receive something in the mail, whats the deal with turbos, ive got a set of -5's on it, question is how far back to stock are we talking?

[R31Nismoid]

Well.. If he said you'll get it in the mail - guess what? You'll get it in the mail

You really need to have a read of this thread. It'll give you a fair idea of what you need to change.

You'll only need to change the things that can be picked up. ECU is obvious, you already know that. So what else does the ECU control? Injectors, AFMs etc. Only stock items can run on a stock ECU etc.

[MrWindsurf]

It's not 75%

It's a set RPM determined by the EPA - which is more than that.

Either way, you need to be 89dB @ 4900rpm - that includes on back off/rundown. Which is usually what trips the meter.

Unless you have a stock exhaust, you'll fail.

Unless you own a gtr which when it rolled out of the factory in japan was over the 90db limit for Australia ... go figure that one out.

[W0rp3D]

A while ago i read there was specific areas that are exempt from height rules, from what i read it was a meter either side of the axles, downloaded the mod guide from vic roads to check and there is nothing in there any more, it is a new one too, october 2011 is the date on it now.

Last time i looked at it exhaust manifolds were free as long as all the original fittings were retro fitted, now you need to have documents from the manufacturer to say that the manifold you are using is suitable for that car/engine, im glad my chinese stainless manifold cracked and i went back to standard.

seems things are getting worse

Edited March 16, 2012 by W0rp3D