Progressive V.S. Linear...Springs

[zappy65]

Okay so really long story short, I want Lovell Springs, they have a linear front and rear, and a progressive rear, tell me why? what would be the posittives of putting a linear front with a progressive rear? What are the positives of linear all round? A couple of pepes have told me different things so i think a universal opinion is in order...

[Orion]

My Espilers are progressive rears with linear fronts. I think that progressives in the rear allow a greater drop and therefore are preferred for looks. Linear fronts are used to provide a bit more predictability for cornering.

[Putonyourshoes]

progressives give you a less rough ride.. but they tend to be a little sloppy..

[zappy65]

What if i was to want to sacrifice ride quality for cornering ability...after the BPT rebuild is complete i want this car to be a really good handling/mid torque vehicle...you reckon linear all around would be prefered for my choice? im not to worried about look seither, as longas the driver looks good lookin, nothing else matters..hahahaha but the lovell sports lows do drop the car 25mm in the front and 35mm in the rear i think...

[FEM]

I would definatley go linear all round and sacrifice a tad of comfort for performance.

I personally would call lovell and get them to make you a custom spring rating.. that is what i am doing. you will only ever get what you really want when it is custom... its like building a house. you have it the way you want when you build but when its built already, you dont have that choice; you have to improvise.

i am getting 5.5kg at front and 3.4kg at rear, that wont be a rock solid ride but i think a 6kgF+ and 4kg+ rear will be what your after...

dddddan

[Cosmo Dude]

Think about what you want from the car and who will be riding in it.
The GF probably won't want to get in if the ride is harsh and your mates will probably rather catch a taxi than cram into the back of your car if it's running on the bump stops....
Don't make it handle like a track car unless it is one.

[chicaboo]

Or you can get Eibach springs and have everything you want in one package...

Gav.

[project.r.racing]

each have their pros and cons.

progressive rears are there to allow different weights in the back of the car to settle and adjust to road/weight changes. part of it move very easily, part of it move like a linear spring.

the linear front support mainly then engine's weight at the front. the front loading doesn't change much. but the rears change alot, fuel tank at full will add 35kg, 1 male passenger will add 75kg each, or luggage in boot etc. these weight changes need to be compensated for, progressive springs allow for this. and allow more articulation in the suspension system. they allow bumps to be absorbed easier.

driver and front passenger aren't really an issue as they sit in the middle of both front and back wheels and the force of bumps is shared accross the chassis of the car.

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linear rear springs are stiffer and don't compensate for the above listed items. add weight and a stiff springs and you'll feel every bump. passengers sit above / right on the rear springs. i sat in the back of my car while a mate thrashed it hard around some bumpy round-a-bouts. it was fun and like a rollercoaster, but i could feel my ass going numb real quick. but these are more stable as they do not have that extra articulation that i referred to earlier.

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ask gotta find out what you require from the car??? if you don't carry passenger in the rear, linear might be okay for you. if you only want looks then progressive would be fine. there are more questions to ask.

---

5.0kg/3.5kg is a pretty high/stiff spring rate, if you wanna go race car style but not too hardcore at the same time, try 4.0kg/2.8kg. the best thing i think you can do is to drive in some cars that are the same weight as your BG, 1050kg I think? and then see what spring rates work for your tastes.

i use 7.5kg/5.1kg - sometimes a little too stiff.

Ryan

p.s. your BG came factory with linear fronts and progressive rears.

[zappy65]

Originally Posted by chicaboo

Or you can get Eibach springs and have everything you want in one package...

Gav.

I cant get em silly....

[chicaboo]

Originally Posted by zappy65

I cant get em silly....

Yeah you can, I found the part no's for Tinastar one time even. ICBF'd looking them up again, but it's only the KE/BF that you can't get Eibach springs only, and you need to get ground conrol sleaves if you want em that bad. So BG should be fine.

Gav.

[Putonyourshoes]

whats so good about these Eibach springs??

[FEM]

ooooooooooooooohhhhhhhhhhhhh.... put on your shoes........

UN-FREEKIN-BELIEVABLE

[zappy65]

well when greg gets back to me with prices for the springs ill have a go with them firts, if not, ill sell em and get an Eibacg sleeve kit...sounds like alot of work though...whats involved in putting a sleeve kit on the KYB strut?

[Smikey]

I got eibachs progressive springs all round my car and they are fantastic. Don't really have much to compare them with but the ride is stiff but comfortable (like a new car kind of feel), so comfort and performance. On my BA though, but i imagine the results would be just as excellent. Cost is the issue i believe.

[chicaboo]

Eibach springs aren't floaty like stockos or Kings, and generally absorb any bump with 1 rebound, so you don't get that giggley sensation over rough roads. They are stiff still, but seem to be the ultimate no-compromise spring for any/every occasion.

And then you have Eibach Ground Control coilover sleave kits. You pick the spring rates you want and then just slide the kit over the strut body, and use the upper spring cap provided under the stock strut tops. It's pretty simple... You can get these for KE/BF to current, so heaps of choices to drive you mad when you factor in spring rate selection.

Gav.

[Astro Boy]

Originally Posted by chicaboo

Eibach springs aren't floaty like stockos or Kings, and generally absorb any bump with 1 rebound

Gee... makes you wonder why you need shock absorbers then... have a re-think about that. That's like trying to tell that if I drop an Eibach spring on the ground it won't bounce. Metal is metal, whether its an Eibach or a Kings, its still up to the shocks to absorb in a given number of oscillations.

[Putonyourshoes]

how much would a set of these set you back for a v6 BA you recon?

[Astro Boy]

The Eibach's... about $550.

[chicaboo]

Originally Posted by Astro Boy

Gee... makes you wonder why you need shock absorbers then... have a re-think about that. That's like trying to tell that if I drop an Eibach spring on the ground it won't bounce. Metal is metal, whether its an Eibach or a Kings, its still up to the shocks to absorb in a given number of oscillations.

I was prolly confusing my Tockicos for my Eibachs sorry. But when I ran the Eibach springs alone, they were unreal, and felt much better than stock. Springs alone can make a massive difference though.
Gav.

[Putonyourshoes]

can we get those through you mate?