What are Parabolic Springs? How do they work? 4x4 Suspension
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- เผยแพร่เมื่อ 23 ส.ค. 2019
- We compare parabolic springs to leaf springs. We replace the original Toyota leaf springs with Terrain Tamer Parabolic Springs, in a Toyota 79 series Landcruiser 4x4. By the end of the video you will have a good understanding about parabolic springs and how they work.
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Great point about a lack of friction in the spring pack requiring additional damping from the shocks. That's a detail most people would miss.
Right on
you can insert a thin pad on every leaf spring to reduce friction .
That's the most informative vid I've seen on these springs, cheers Matt ya mad bastard!
Woot woot :)
I love your little Land cruiser!!!
Fantastic video!!
Great video👍
Hope they're better quality than the Terrain Tamer coils and struts i had in my hilux. Absolute rubbish. Collapsed coils and busted strut bushes on very light work.
Wow this channel awesome content bro, nobody talks and test like this
Thanks kindly.
Great vid once again.
P p parabolic 😁 keep up the good work
😂
Love how you guys down in Australia are improving leaf springs! I have a 1st generation Ford Super Duty, a 2004 F350 to be exact. Ford used parabolic front springs stock BUT every company in the states says they are junk and only offer multiple leaf packs as replacements. Wish they would follow Australian engineers and make upgraded parabolic springs for the Super Duty trucks. For now I'll jeep running my stock parts
I have a 02 f250 and apparently I can get aftermarket parabolics for it.
Sold. These will go on my 79 this year. Funny enough i have added 500kgs in the back with a full sized canopy! So i know these will work. Thanks Matt!
I'm confident you'll be happy with them.
Nice video bro. After buying a 79 series all I think about how can I improve the ride quality. This video is very helpful
I was impressed
Cheers for this vid. You would think with less metal in them, they might be slightly cheaper than the regular leaf's - but that's not the case for my VDJ76R ;)
No, i guess the process must be difficult.
Do a video on helper springs plz! Like the hellwig or ironman load plus.
I'll keep it in mind. Cheers
Awsome vid again Matt I will have to get me
A set of them in the 07 SR5 Hilux an flick the old style leafs
Nice
I've just been too IronMan 4x4 now too price a set and an also shocks too as i still want some comfort as the guy said that the rear will have a harder ride when not towing the cruiser high side camper trailer but when towing the camper it will be perfect
Hi MadMatt. Love the video and wish that Terrain Tamer had these for my vehicle. Who else makes Parabolic Springs? I have a 1985 Toyota Land Cruiser BJ73 FRP Top. Thanks
Thanks mate. I wonder if you spoke to terrain tamer they would have a set from something else that’s not listed? I don’t know who else makes them though.
Great video and makes me wonder why so many leaf sprung ustes don't come with such a spring set up from new. Cost would not be a major issue for a manufacture surley? Might help me make up my mind on buying a ute now. I just want a basic run around single cab for personal use but the ride on all such utes is bone jarring without 500kgs in the back and even then still rubbish so buying a new ute and putting such a spring on it would solve all those issues for me.
I would certainly want to run parabolics if I owned one.
Drive it like you stole it
Lol
Cheers for the video bro very informative
Glad you liked it
The military wrap @3:05 is gone @4:24 Thanks for the video. learned a lot
The wrap is on the front end 😀
Awesome video mate, I didn’t realise parabolic springs were load carrying, so thanks for that i might look into them. Hopefully they make the for the 76 series 👍👍
Thanks for sharing
I believe they do.
The links are in the description
nothing on the site yet
Might be worth a call. I believe the range is increasing all the time.
I know lots of bush vehicles are getting them put on here in the Alice as they are lasting heaps longer than the standard and yes they get flogged.
That’s interesting to hear
I just put parabolics all round on my 75 series. Love them to bits. Great video, I have been trying to explain them to people but I will just send them to this video instead. Haha
The Fauna Fetchers
Hi, are they comfortable in road when there is no load at all
It’s definitely more “bouncy” unloaded. But still better then more leafs.
Do you have the specs for the parabolics you used on your 75? I wanted to upgrade my old 75 too but can't seem to find any suitable part numbers for the right parabolic springs
what brand did u use
@@tourtonne3paramaribo315 Same here, was looking for a response from maddMatt to confirm the specs of the leafs used in this video
Awesome work Matt, are these also available for the front for the early LandCruiser's?
That I don't know but head to the links I have in the description.
@@MadMatt4WD thanks for that, will do
Thanks for the video, what’s the load carry weight recommendation of the parabolic springs, or is it possible in theory to have a 2tonne parabolic if that is what is required?
It's possible to have 2T parabolic. Trucks use them. The rating will depend on your vehicle.
MadMatt 4WD awesome, I had a feeling it was possible! Definitely keen to look into it
Great vid. Think I'll flick the diabolic standard springs in favour of the probolic springs and give it some anabolic steroid strength.
Nice and such a creative writer.
Hi Matt. What shocks were you using with the terrain tamer parabolics? If Terrain Tamer, which of the 3 choices from them? I am interested in these on a Hilux but can find out very little about the terrain tamer shocks.
Hey Peter. Best to chat with TerrainTamer about your situation. The vehicle in the video is not mine but was fitted with TerrainTamer adjustable shocks
Wonderful,
You mean that the typical suspension springs which have the inter-spring layers friction prevent the required strain of the springs to minimize the impacts from bumps and jolts from the road, so the more the friction, the less we have spring displacement and the more the impact force is imparted to the cabin!
It seems this friction mechanism convert some of the impact energy to heat, but also prevent absorbing the total impact force so the remaining force is applied to the car structure!
Ok that sounds very complicated but if I understand you what you say is correct.
Yes, and no. In a ideal setup, that force is suppose to be absorber by the "shock absorber", in normal leaf spring part of that energy is as you say friction from the leaf spring, probably a very little, but noticeable because of the brake away force required.
Whit parabolic, as correctly mention in the video you need sock absorbers tuned to match the new springs.
If the wonder spring compresses half as much under the same load then it can't be softer. Spring rates are not irrelevant. Even if the spring rate were variable (soft under light load, harder when compressed under heavy loads) they would not compress less, but more. It's always nice if spring rates are specified. OME do so but Terrain Tamer don''t even list recommended loads for their springs as far I can see.
I think it's more to do with the inter leaf friction that changes the rate.
@@MadMatt4WD yes and not only that,the design itself its pretty awesome, just hard to manufacture
I have OME leafs on my 76 based on the specs suggested by ARB, awful! I will be replacing them with TT parabolics but keeping the OME BP51. Not the first set of suspension I've had from OME either and I will never purchase OME springs of any kind again.
QUESTION- DO PARABOLICS WORK WELL ON FRONT SUSPENSION Eg- 1997 TROOPCARRIER?
If you can find some they’ll work well.
Hey Matt, would these springs work for a HZJ75? Can't seem to find a kit for my old 75.
You would have to ask TerrainTamer
What would be a good shock absorber adjustment for the Parabolic springs Sir?
The terrain tamer pro shock.
Thanks Matt 👍
Ford Transit had front(single leafs) parabolic leafs back in the early 70s they been around a while. F250 have them as STD at around 1998. And yes they give the comfort of coils with strength and load carrying of multi leafs
Yes they're not a new concept at all.
How did they hold up over time? cheers mate..
They’ve been really good. The biggest drama is people not getting the right springs for the load they carry.
Hi Matt,
Do you know if they make them for the 76 series? I cannot seem to find any info for the 76 series prabolic springs.
Not yet but I believe they will do soon.
They do now as ive just put them on my 76 and did a 2" raise as well. So far they have performed better on all that ive thrown at them.
Ive seen slapper springs like those get folded back and bent when they hit a rock. they may work great on a work truck, but on a off roader not so much.
You’d have to hit the rock fairly hard I would think.
@@MadMatt4WD i live only a short drive to the Rubicon Trail. I've seen many times where those slapper springs cause trucks to get hung up on obstacles. some times when hung up it causes the spring to bend. best to stick with a properly built pack and loose the slapper springs.
I want to wheel Rubicon one day. I guess most of the people buying these springs are touring rather than rock crawling so this won't be an issue. Horses for course ay.
I see that they havent thought about when the lower leaf dropping, it can hit an obstacle and get bent or making it difficult for the car to move or even any object can get trapped in when it moves down.
That’s a common problem with most leaf spring setups.
Sir it’s great. How much does it cost for land cruiser 70? Web link plz
Hey mate head over to the Terrain Tamer website.
@@MadMatt4WD thank you
Hi matt, why do you think toyota dont build there 4x4's with these as standard?
I imagine there’s a lot of reasons but it’ll come down to an economic cost to manufacture type deal.
If you are going to change the springs change to coils springs they weigh less and work better. Cheers
Superior engineering do a great kit IMO
What are the best shocks to use for parabolic springs?
Shocks that are correctly rated for the spring installed.
@@MadMatt4WD Thanks for the reply but I was hoping you would be more specific.
We get your reasons for parabolics, but the Land Rover units we have seen, are often sagging after a few thousand kilometers even with hardly any off-road work. Also, the bottom leaf on the parabolic is like a brush collector and earth digger in the way it sticks out waiting to snag on some nice piece of timber. Sorry mate, we named them 'Diabolics'.
That’s what I’d seen as well but the terrain tamer steel seems to be way better quality and from what I’m seeing they’re not sagging.
Could I use parabolics with bp51 shocks?
I would think so being that they are adjustable. The Parabolic will need more shock than the standard spring so as long as the BPs have the adjustability I would think they would work.
Are these rear Springs available for rzn169 Hilux?
please contact Terrain Tamer
you took the air bags out for those PB springs, put them back in and then see how it ride, because its much the same with air bags as the other springs.
No way it can be. The interleaf friction will not allow it to be the same. Also the airbags had no air In Them.
thanks for the feed back
How do you do this? How many leaves in the pack?
You buy the right spring to suit your vehicle from terrain tamer.
Can the parabolic spring support 3-4 tonnes of carriage load capacity?
Yes so long as they’re designed for it. Trucks use them.
@@MadMatt4WD oh! Awesome then👍🏻
Is it comfortable and can carry loads?
Well as i say in the video I certainly think they are an improvement on what was taken out. Time will tell on how they carry load long term.
MadMatt 4WD
Are the comfortable if there is no load?
I couldn't say as I didn't have time to test that. I would think so.
Um no bump stops in the rear??? Poor leaf springs 😥😢
i think there was some chassis stops on there.
So basically a better riding lighter weight boat anchor to catch on every thing off-road 😂
Lol
They bent way too far. Looks too soft for me.
Yeah only at full flex which is what you want. They have different ratings.