Compliance question

warrior · Post by **warrior** » Tue Feb 19, 2013 11:10 am

Its just about time to get my car certified for a few things, supercharger, adjustable suspencion and more than likely the exhaust.

I would think the supercharger and adjustables would be fairly straight forward but I am worried about my exhaust. IT IS QUITE LOUD.

My question is should I go and get another resonator put in it now or wait untill certifacation and see if they pull me up for it? I know its hard to say if its too loud without hearing it but what are your thoughts?

Angreal · Post by **Angreal** » Tue Feb 19, 2013 11:32 am

If you can find a Harley, bring it along at the same time and the car will sound quiet

siren676 · Post by **siren676** » Tue Feb 19, 2013 11:34 am

I wouldnt worry about it too much. My starlets exhaust was really loud(1 reso + straight through muffler) and it would have passed had the guy not made me get a cat converter

ross · Post by **ross** » Tue Feb 19, 2013 2:21 pm

If its to loud it will fail.
Theres a noise DB limit which it will pass or fail.

I guess if it fails you put on a resonator if not its all good.

A overloud exhaust tends to be droning headache inducing pain after a while, also good excuse for the law to pull you over.

SLYDIT · Post by **SLYDIT** » Tue Feb 19, 2013 5:44 pm

Drop your car aslow as you think will pass. They record your ride height. Something my cert guy didn't effing tell me!

warrior · Post by **warrior** » Tue Feb 19, 2013 5:54 pm

Yeah Ross thats what I thought, can allways fix it afterwards but it may just pass.

And yes again, I will drop it as low as I think then I can bring it up if they are not happy.

I,m guessing it will be quite a long process

Snapfrozen · Post by **Snapfrozen** » Tue Feb 19, 2013 6:10 pm

Ok, so to clarify some info as I've certed a car about 4 times now. (Last time was 1 week before they brought in the cat rule, so its been a while now, info may be old)

1. The LVV cert and the noise test are different tests. You will not fail a cert for being too loud, but your exhaust system will not be approved on your cert.

2. Get your car to the height you want it, not neccessarily the lowest. You are certed for that height. Any alternation, up or down requires recerting.

3. Make sure she is wearing her good shoes. They will record your wheel size and technically you can fail for wrong sized wheels.

4. Check your camber, you will fail outside a certain range (Which is hard not to do on an MX5)

Mad Kiwi · Post by **Mad Kiwi** » Tue Feb 19, 2013 6:42 pm

Just passed my cert with Neil Fraser today...so can clarify a couple of things....

Exhaust / Noise.
He said the noise wasn't a problem with my car but could measure it if I wanted him too.....i declined in th ehope noise wasn't mentioned on the cert....

He never mentioned the requirement for a CAT and I dont have one. (Keep this to just us if it is a problem, I dont want to have to run a CAT !!!)

Height.
He said that they allow you 5% leeway from the certed height and that in this case was 15mm (I haven't checked his maths). We have certified the car at 290 mm front and 310 mm rear.

Drive Shaft.
As of 2009 all cars needed a drive shaft retaining loop max 150mm from gearbox from minimum 5mm Steel.

Camber.
You can go max of 30 deg (1/2 a degree) beyond the manufacturers recommended at the rear (didn't discuss the front) BUT with a competition licence/MANZ homologation it was open.

I showed him the 949 road/track recommendation that I have and he has passed it.

I suspect most certifiers interpretations are slightly different....

I can heartily recommend Neil Fraser, he was a nice man, very complimentary of the car and said that mx5's must be becoming very popular as he has inspected quite a few lately. So has a bit of experience with them.

Snapfrozen · Post by **Snapfrozen** » Tue Feb 19, 2013 6:54 pm

He's definately a top bloke (Y).

Cat isn't required if your car is older than 1990/91 (Correct me, can't remember the year) or if it didn't come with one from factory. <3 having an 89

warrior · Post by **warrior** » Tue Feb 19, 2013 7:46 pm

Thanks mad kiwi, good info. Can I ask how much it cost? How long it took? and did you stay there while they did it. Cheers

Snapfrozen · Post by **Snapfrozen** » Tue Feb 19, 2013 7:50 pm

Takes around 2 hours max if everything goes to plan

Otherwise, it can take 30 days

warrior · Post by **warrior** » Tue Feb 19, 2013 7:57 pm

Fair call

Mad Kiwi · Post by **Mad Kiwi** » Tue Feb 19, 2013 11:44 pm

Took about 30-40 minutes, he took it for a quick test drive, jacked it up asked questions re the brakes, suspension etc.

Filled out the paperwork and I was on my way.

I need to send paperwork (inc competition licence application - due to roll cage) to MANZ for authority card (takes about a week he said) then return authority card to him and he completes the cert paperwork and about a week later you get the cert....apparently.

I am still just stoked that I passed after 10-12 months of hard work getting things right (roll cage and race seats in a ROAD LEGAL Mx5 for a 6'2" ....not thin, owner) was NOT easy. I dont think I would do that again.....

MrGrey · Post by **MrGrey** » Wed Feb 20, 2013 12:05 am

congratulations, glad it went smoothly

Mr. Shine · Post by **Mr. Shine** » Wed Feb 20, 2013 10:35 am

As has been said, exhaust modifications never require certification but are required to meet usual WoF standards.

RMS · Post by **RMS** » Fri Mar 29, 2013 6:45 am

Always a wealth of info on the lvvta website.. definitely worth a look if you are modifying your car because it spells it all out pretty clearly.

http://lvvta.org.nz

I can't confirm it because I cant download the relevant documents at the moment but I believe that any car originally fitted with a catalytic converter is required to retain a catalytic converter. The exemption for older vehicles is to do with the practicality of fitting a cat - if the car originally had one then there should be no problem fitting one.

Obviously nice to have a sympathetic certifier though

WideOpenThrottle · Post by **WideOpenThrottle** » Fri Mar 29, 2013 7:43 am

My car was passed by Neil Fraser without a CAT and dont forget you need a driveshaft safety loop for Turbo/SC cars.
Expect to pay $575.00 like what i was charged [turbo-front mount-bodykit-boot wing-suspension-wheels-tyres-seat-half cage-exhaust-loop-brakes].

warrior · Post by **warrior** » Mon Apr 01, 2013 9:58 pm

Anyone out there what to build me a driveshaft loop and fit it as a paid job? Or where can I get it done? I forgot about it

chris · Post by **chris** » Tue Apr 02, 2013 8:49 am

Had mine done by Neil too. Good guy.

However set the height of the car as the height you want it. Not the lowest you want it as stated above, any height modifications require recerting (Much like mine does now)

SLYDIT · Post by **SLYDIT** » Tue Apr 02, 2013 11:00 am

Better to be higher than cert than lower. Cops will not tolerate lower. Theyll be reasonable if its a bit higher.

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