Jump to content
SAU Community

Recommended Posts

As my car was manufactered before 1995 the pits will have no problem with it having a carbon fibre bonnet...

BUT i dont know whether or not they'll pick on the vent that is facing the windscreen. The vent is ontop of my vmount intercooler (before the engine) and its not really possible for fluids to pass through.

Does anyone know if they'll pass this? Should I block the vent up?

  • 3 weeks later...

Actually sorry her32 thats incorrect - vents are allowed, but they cant have openings facing the windshield no matter where they are positioned so you'd need to block it up.

Here's the basic skinny from the DPI website:

No structural cosmetic change is allowed other than spoilers and bonnet scoops.  

1. The fitting of front and rear spoilers either of fibreglass or sheet metal is acceptable, provided it is not likely to increase the risk of bodily injury to a person.  

2. An air scoop fitted to the bonnet of a vehicle must not intrude into the line of sight. An air scoop must not have an unobstructed rearward facing opening (an incident such as the bursting of a radiator hose could result in the windscreen becoming completely obscured). The maximum air scoop protection should not exceed 60 mm

Thats the basics - but Ive also got the printed long version - which I almost wasnt gonna be bothered typing - but hey - got nothin else to do so here you go:

DEPARTMENT OF PLANNING AND INFRASTRUCTURE

VEHICLE SAFETY BRANCH

TECHNICAL SECTION

BONNET SCOOPS AND PROJECTIONS

Modifications to the bonnet of a vehicle should take into account the possibility that the body of a pedestrian or cuclist might strike parts of the scoop (or bonnet projection) in an accident.

Parts of the scoop likely to be struck are the front, sides and top. The top surface of a scoop should not be more rigid than the original bonnet in case when a load is applied to the scoop perpendicular to the surface of the bonnet.

Engine mounted scoops

No metal engine mounted component likely to increase injuries to a pedestrian in an accident may project through and above the bonnet profile without being protected with a cover mounted to the bonnet.

Bonnet Mounted Scoops

* When a 165mm diametre sphere is placed on the bonnet in front of the scoop (or bonnet projection) and rolled rearwards until it touches the bonnet scoop, no point of contact between the sphere and the scoop shall lie above a horizontal plane passing through the centre of the sphere. ie:

ScoopOpeningSize.jpg

* When sitting in the driver's seat with the seat located at its rearmost position, it shall be possible to see either the surface of the road, 11 metres in front of the driver's eye or the front edge of the original body when looking across the top of the bonnet scoop;

* Alternatively the eye position can be taken as being a point 730mm above and 270mm forward of the junction of the seat cushion and the squab with the seat in its lowest and rearmost position;

ScoopLineOfSight.jpg

* The edges at the front of a scoop likely to come into contact with a pedestrian in an accident shall be well rounded with a minimum of 10mm radius;

* The scoop mustnot have reflective surfaces which will cause glare towards the driver.

:thumbsup:

Adam

Can a rear facing vent just be covered on the inside with a bit of plastic/plywood glued on there? Are those regulations valid for NSW?

I would imagine if you could clearly demonstrate the bonnet was completely sealed off from the vent (no possibility of fluids gettingt through) you'd be ok - coz it wouldnt be a vent - itd be a lump on top of your bonnet lol :wassup:

But u know how it works - depends on the cop who stops u - might just hit u with a yellow and leave it for the inspector to determine if its properly sealed.

And I am not sure if its the same in other States - but dont underestimate the value of walking into an inspection centre and politely chatting to an inspector who isnt busy inspecting - they always pull out all the extra detail and copy it for me when Im thinking about a mod. Great to have on file to show to a nicer cop who might be genuinely ok with having it clarified for them when they enquire about a mod uve got. But if you know u've scored a tard cop then dont even bother agitating them with documents.

:(

  • 4 weeks later...
  • 2 months later...

i got defected the other day for having a carbon fibre bonnet on my 1990 r32. i thought it was pre 95 as well and is what i told the f**k head cop that booked me. i havent gone to get it checked yet either, so im not payin the fine till i know for sure

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • That's kind of what I was getting at saying you'd be here soon regarding length etc being able to add additional restriction.  My assumption (possible donkeys of you and mption) is that the length of hose to an oil cooler, and back, isn't going to be that huge of a loss. Typically you're talking about 1.5m of total length. And so far everyone in our world hasn't had issues with oil not being able to get to a cooler and back, it's more been, how the heck do we get the oil out of the head and back down to the bottom? I'd nearly hazard a guess the biggest issue people have with oil cooling and oil supply, is being able to get the heat out at the cooler itself (not enough air flow, too small of a cooler etc) Also, when people mount them wrong and make really awesome air traps so they've dramatically diminished the cooling capacity.
    • I will rebutt this and the preceding point from Dose....but without doing any calcs to demonstrate anything and without knowing that I am right or wrong. But... The flow capacity of a fluid transfer system is not limited by the smallest orifice or section of conduit in that system, unless it is drastically smaller than the rest of the system. OK, I use the word drastically perhaps with too much emphasis, but let's drill down on what I really mean. The flow capacity of the system is the result of the sum of the restrictions of the entire system. So, to make an extreme example, if you have a network with 3" pipe everywhere (and let's say a total length of only a few metres) and that 12mm ID restriction of the oil filter connection being the obvious restriction, then for any given amount of pressure available, the vast majority of all the pressure drop in the system is going to occur in the 12mm restriction. But.... increase the length of the 3" pipeline to, say 1000m, and suddenly the pipe pressure loss will likely add up to either be in the same order of magnitude, possibly even exceeding that of the 12mm restriction. Now the 12mm restriction starts to matter less. Translate this to the actual engine, actual oil cooler hose sizing, etc etc, and perhaps: The pressure loss caused by flowing through the narrow section (being the 12mm oil filter port, and perhaps any internal engine oil flow pathways associated with it) is a certain number. The pressure loss through, say, -12 hoses out to the cooler and back is negligible, but The pressure loss through -10 hoses out to the cooler, at the exact same length as the above, starts to become a decent fraction of the loss through the 12mm stuff at the filter port. Maybe even it starts to exceed it. I could actually do these calcs if I knew 1) how much oil was actually flowing in the line, 2) gave enough of a f**k to do things that I hate doing for work, voluntarily for a hypothetical discussion. Anyway - I reiterate. It's not the narrowest port that necessarily determines how much it can all flow. It is the sum. A long enough length of seemingly fat enough pipe can still cause more loss than a semmingly dominant small bore restriction.
    • To pick up what Dose is putting down. Not a lot of point running a huge hose if the motor is still restricted to the smaller size... It's only capable of flowing so much at that point...   *Waits for GTSBoy to come in and bring in the technicalities of length of pipe, and additional restriction from wall friction etc etc*
    • Hooley Dooley these things have some history! If i sell them they will need a certificate of providence to prove they have been in the hands of verified RB20 royalty! They have been stored in a plastic tub, away from sunlight and moisture. They are in mint condition. And they will stay that way, as i have sprung the money for a set of shockworks coilovers. I'm just working on getting them in at the moment, after rebushing the rear of the car, and while the subframe was out i welded in the GKtech reinforcement bracing as well.  They will get a workout at Ararat King of The Hill in November. I ran 48s on the short course there a few months ago, and i am hoping with new bushes and shocks in the rear i can launch a bit harder. There was a fair bit of axle tramp when i tried too hard off the line. a few of the corners had dips mid way which also made the car feel a bit unsettled, hopefully this will help there too.   
    • Food for thought, the stock oil filter thread is a 3/4-16 UNF, which has an ID of about 10 to 12mm (according to ChatGPT lol). Now compare than to an 10AN, which has an ID of about 14mm (Raceworks is 14.2mm, Speed flow is 14.27mm).  
×
×
  • Create New...