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WA Engineering and power limits


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#26 bat 53

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Posted 11 April 2021 - 09:39 AM

problem with these overpowered cars is 

alot of them have had a big horsepower engine fitted with no other modes done to chassie brakes and so on 

had a few people come to me for conversions , but only wanted bigger engines no chassie or brake upgrades 

told them not interested and go away ( being polite )



#27 Oversteer

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Posted 11 April 2021 - 01:14 PM

WA DOT/POL is run by some very nanny thinking people, they have been on a campaign since the early 2000's to rid all cars older than 1990 from the road, and put a halt to all and any modifications(including factory option to model cars, ie V8 in 6cyl holden, turbo engine into n/a VL/jap car etc).

There was a big report commissioned into road safety and crash data ~4 years back which when viewed from their nanny head-in-arse position lead to current we-make-out-own-rules WA policies, and hoon laws etc, I have read several letters and been lectured too personally about crash safety of older cars and reasons why they don't want to allow HP in older cars, and there are some valid arguments against it, a little paranoid, but they are valid arguments, and denying they exist like a lot of pro modification people doesn't strengthen your argument.

Its also a pity at the same time engineering to improve performance and safety is flat out refused with no consideration because its too hard and no one wants to understand it.

 

 I've been modifying cars since the 80's, and I knew from the start(probably from driving farm hacks on dirt and doing stupid shit since I was old enough to reach the pedals myself..been real lucky!), that common sense is a must have, a man's gotta know his and his cars limitations, modifications can't be a death trap and you keep your fuccking head down when your doing/driving something that's not quiet legal !

 

It gives the departments way too much fuel for their own nanny argument with all these big hp cars in magazines and on social media which, have plates on them, are shown driven on the road.... and then talked about in the interview being "great and nice to drive on the street" <- which most of the time total bs, a big stall full manual auto with solid drive line mounts, kirky seats etc etc sucks balls to drive for any distance.

 

/end rant

 

TLDR: If you want to be a hoon and drive your race car on the street, time and place and Keep Your frOcking head down so you don't draw attention and ruin it for everyone.  



#28 ozyozyozy

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Posted 11 April 2021 - 07:59 PM

Too many cheating it. If done right should be no issue.
To be fair alot more people now think about suspension and brakes when modifying, years past these were not a consideration

Agree with you oversteer, if your going to drive them on the road, try not draw attention

#29 DanWA

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Posted 13 April 2021 - 09:21 AM

Like everyone is saying, there is people ruining it for everyone else

 

Especially this x power and x 1/4 mile "street" car ego war on social media. It is a track/event car with plates get over yourself

 

My car was trailered everywhere until i completed the engineering and modification permit process and it was rego'd the whole time


Edited by DanWA, 13 April 2021 - 09:23 AM.


#30 Redslur

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Posted 14 April 2021 - 12:23 PM

500hp is enough for me in an older street car. My HQ will easily get me in to trouble if I were to be a dick. Had plenty of big engine cars and reckon 500hp is pretty much enough for a streeter. After that you really lose too much drivability. Bit different with the more modern cars though but who cares about them LOL.

 

My two bobs worth.



#31 yel327

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Posted 14 April 2021 - 12:37 PM

I agree. An XY GT-HO had about 330hp. HT-HG GTS350 had 300hp. Both were 14s cars on skinny street tyres with manual transmissions and weighed about 1500kg. 400hp is probably enough on cars of this size and style of suspension. Drop back in size and weight to a Torana and 300-350hp is probably enough for a regularly street driven car. Personally in a bigger car I’d rather a big cube engine with less power and bulk torque, like a 350-400hp 427 with 600Nm of torque.

#32 LXCHEV

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Posted 14 April 2021 - 01:22 PM

Amen!



#33 Redslur

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Posted 15 April 2021 - 12:16 PM

We must be all getting too old LOL....



#34 rexy

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Posted 15 April 2021 - 06:27 PM

If the cars in question are talking it up in the magazines, running hard at the strip but driving like miss daisy on the street what’s the problem?

if they are ripping it up in the neighbourhood that’s a problem!

 

Is there a problem in WA with 1000hp cars doing burnouts and street racing?



#35 LJ RB30

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Posted 15 April 2021 - 11:38 PM

Mine has 403rwhp with estimated 550ftlb flywheel torque. 

Definitely enough to totally f@#k  you up if not concentrating but always wanted more at  the drags (though gearing wasnt ideal)

Makes a 1200kg car boogie 



#36 myss427

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Posted 16 April 2021 - 08:38 AM

Big horsepower is fine if you use it in the right place, not in traffic or built up areas. Obviously the car first of all has to be made to be able to handle it, with strengthening, brakes, handling etc. Too many high horse cars out there set up for the strip that won't go around a corner.



#37 Redslur

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Posted 16 April 2021 - 12:11 PM

You are just trying to justify your car Brett  :stirpot:

 

Big horsepower is fine if you use it in the right place, not in traffic or built up areas. Obviously the car first of all has to be made to be able to handle it, with strengthening, brakes, handling etc. Too many high horse cars out there set up for the strip that won't go around a corner.



#38 Nugget

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Posted 29 June 2021 - 04:52 PM

Has anyone successfully had engineered a stock LS3 into an LX in WA yet?



#39 bat 53

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Posted 01 July 2021 - 10:27 AM

max capacity engine for that car is LS1



#40 Oversteer

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Posted 01 July 2021 - 09:18 PM

Have heard of a 6.0 going through, try the application with 6.0 and see, if they say no go 5.7.



#41 bat 53

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Posted 02 July 2021 - 10:48 AM

mate was knocked back with 6l in a VK



#42 Redslur

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Posted 02 July 2021 - 12:16 PM

SLR5000 weight is 1275kgs. I have documentation to support this. Multiply that by 5 and you can have a 6.3L legally.



#43 ls2lxhatch

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Posted 02 July 2021 - 03:14 PM

WA now has a Power to weight ratio limit of 180 KW/T.  

 

At 1275 kg the maximum is 222 kW / 296 HP. The factory rating of the LS1 is 227-260 kW.

 

https://www.transpor...S_VS_IB_134.pdf

 

Any vehicle that has an unmodified power-to-weight ratio that falls outside the limit will be assessed on a case by case basis.


Edited by ls2lxhatch, 02 July 2021 - 03:15 PM.


#44 Lima31

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Posted 02 July 2021 - 04:33 PM

SLR5000 weight is 1275kgs. I have documentation to support this. Multiply that by 5 and you can have a 6.3L legally.

Yep, and the reason I posted to this thread is because it seems they have gone back on that requirement and now will not permit a 383, but may permit a 355.

#45 yel327

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Posted 02 July 2021 - 07:37 PM

Just call them a 350! Or if it fits a 377. Don’t use the overbored engine ci!
It’d be interesting with older stuff it it comes to it. The old capacity limits allow even up to 454ci in a HK, but if they tried to apply power it’d be interesting as some 454 were as low as 220hp, less than a HT 308.

#46 Oversteer

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Posted 03 July 2021 - 04:38 AM

That's why they are now banging on about 180Kw/T, and want dyno tests(and swept vol), with an LS stating a standard unopened motor is helpful.

 

As always its a lottery in the wild west.. a 6.0 was allowed in a big torana, maybe they are getting smart and if you don't mention brake upgrades you have less of a chance(doubtful but one can dream)


Edited by Oversteer, 03 July 2021 - 04:40 AM.


#47 rexy

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Posted 03 July 2021 - 01:27 PM

So just do what everyone has always done. Get it passed and then put the good motor in.



#48 Nugget

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Posted 04 July 2021 - 04:19 PM

Seems like the only option. I've had a COME Racing 383 Holden block for over 20 years, towed a caravan around Australia with it.
Really it's been a joy to own. Obviously its no comparison to a modern fuel injected mill and It's getting tired.

 

Maybe a replacement COME Racing Holden block (simple change of engine number I think) and then 420-ish stroker and avoid engineering altogether?

 

Its just that KW/$, it's not a cheap option and I still feel the LS series are superior engines and not so heavy, A=F/M.

 

I did have my heart set on a LS3



#49 Redslur

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Posted 05 July 2021 - 12:12 PM

Yep, and the reason I posted to this thread is because it seems they have gone back on that requirement and now will not permit a 383, but may permit a 355.

So much for having a National code hey :-(



#50 Bigfella237

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Posted 05 July 2021 - 02:10 PM

The whole point of having engineering signatories is so someone who actually knows what they're talking about can say what needs to be done in order to do what you want to do.

 

WA seems to have some little bureaucrat somewhere who has decided to make some blanket rules based on the lowest common denominator, like everything bloody governments do these days!






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