Would passenger tyres be okay for occaisional aired down use?

NachaLuva · Post by **NachaLuva** » Tue Nov 08, 2011 2:08 pm

Yep i've heard that too...the extra rotating mass gives more inertia so you're less likely to bog down or stall. It still sucks power from the engine though...

d_generate · Post by **d_generate** » Tue Nov 08, 2011 4:48 pm

Yeah your clutch would last 5 min with a lightened flywheel, even on a street car it needs a little slipping or higher revs to get going.

2nd Hand Yank · Post by **2nd Hand Yank** » Wed Nov 09, 2011 12:35 am

d_generate wrote:I think I'll stick to my 16" alloys with cheap street tyres then, roughly 16kg all up.

Something interesting.
Simply put, sprung weight is everything from the springs up, and unsprung weight is everything from the springs down. Wheels, shock absorbers, springs, knuckle joints and tyres contribute to the unsprung weight. The car, engine, fluids, you, your passenger, the kids, the bags of candy and the portable Playstation all contribute to the sprung weight. Reducing unsprung weight is the key to increasing performance of the car. If you can make the wheels, tyres and swingarms lighter, then the suspension will spend more time compensating for bumps in the road, and less time compensating for the mass of the wheels etc.
The greater the unsprung weight, the greater the inertia of the suspension, which will be unable to respond as quickly to rapid changes in the road surface.
As an added benefit, putting lighter wheels on the car can increase your engine's apparent power. Why? Well the engine has to turn the gearbox and driveshafts, and at the end of that, the wheels and tyres. Heavier wheels and tyres require more torque to get turning, which saps engine power. Lighter wheels and tyres allow more of the engine's torque to go into getting you going than spinning the wheels. That's why sports cars have carbon fibre driveshafts and ultra light alloy wheels.

Read more: http://www.carbibles.com/suspension_bib ... z1d2DmiEFx

Now I'm wondering if it's worth sourcing some alloys and selling my Sunraysias.
I'd already thought about this before....

Are there any nice lightweight wheels for this 4-lug bolt pattern?

I don't need tyres immediately, but maybe within the next month.

Venom · Post by **Venom** » Wed Nov 09, 2011 8:21 am

14" alloys for these do exist, but mostly in peoples dreams. If you get hold of some I would doubt they are noticeably lighter than your sunraysias, in fact i thought my 14" Rallyharts alloy were heavier than my 14" sunraysia's. I will sell them to you thoguh and i'll even take a non-vital organ in lieu of cash payment

:twisted:

2nd Hand Yank · Post by **2nd Hand Yank** » Wed Nov 09, 2011 8:25 am

Thanks venom, but I'm mostly interested in lighter weight wheels, not appearance. They look nice though.

YouTube · Post by **El_Freddo** » Wed Nov 09, 2011 8:37 am

2nd Hand Yank wrote:Thanks venom, but I'm mostly interested in lighter weight wheels, not appearance. They look nice though.

Yeah, these are probably the lightest L series rims going around without changing your stud pattern. These were built for rallying back in the day and are probably rarer than the 14 inch scorpion rims that I've got on Ruby Scoo, hence the down payment of a non-vital organ...

Realistically you're not going to get super light rims for the L series, just pick the tyres you want to run with and deal with the rest as you enjoy them. The L isn't exactly a performance machine as you've found out, so a heavy tyre and rim combo isn't going to matter for anything other than your wallet and keeping it healthy...

Cheers

Bennie

Post by **TOONGA** » Wed Nov 09, 2011 12:57 pm

2nd Hand Yank wrote:Now I'm wondering if it's worth sourcing some alloys and selling my Sunraysias.
I'd already thought about this before....

Are there any nice lightweight wheels for this 4-lug bolt pattern?

I don't need tyres immediately, but maybe within the next month.

Most of the available alloy rims are 13 inch, like the set that was on my vortex that i still have

as Venom and Bennie said the 14 inch alloy rims with the right offset are rare.

peugeot rims are available as well but come in metric as well so you need to be careful (Im sure we discussed this in your other thread on tyres)

TOONGA

2nd Hand Yank · Post by **2nd Hand Yank** » Wed Nov 09, 2011 10:25 pm

TOONGA wrote:Most of the available alloy rims are 13 inch, like the set that was on my vortex that i still have as Venom and Bennie said the 14 inch alloy rims with the right offset are rare.

peugeot rims are available as well but come in metric as well so you need to be careful (Im sure we discussed this in your other thread on tyres)

TOONGA

Want to swap for some rusty 14" Sunraysias?

thanks, I might check out peugot rims somewhere down the track.

Venom · Post by **Venom** » Wed Nov 09, 2011 10:46 pm

I've mentioned it before in another of your threads, but if unspring weight reduction is a serious goal then going to a 13" rim would A) be cheaper than 14" alloys and B) reduce unspring weight by more than the 14" alloy. I think reducing unsprung weight certainly has alot of merit, even if you're just compensating for the extra weight of a larger profile tyre. I haven't got the faintest clue about 13" tyre selection though... which is probably why you're sticking to 14's.