R33 Gtst Suspension

[tommo!]

Hi guys. Big fan of forum, first time poster and need some help.

I currently have pedders comfort gas shocks with pedders low springs and aren't very happy with the way it handles bumps. Have been scouring through advice others on here have been given and am thinking of getting some bilstein dampers and king spring lows (but open to suggestion) and was just looking for some input into the difference I could expect in ride and height? also what parts I would need to complete the assembly? Could I use parts off the pedders?

Thanks in advance

[hardsteppa]

Would do the bilstein shocks first, don't think there'd be alot between king and pedders springs once matched with decent shocks.

[tommo!]

Ok mate. Was just thinking might give bit more comfort because kings are progressive rate?

[hardsteppa]

Alot of people would prefer Not to have progressive rate springs for handling/performance purposes. I'd be surprised if the pedders weren't progressive anyway, u sure they're not?

[hardsteppa]

Also from memory only 1 end of kings are progressive, other is linear, think its rears that are progressive?

[GTSBoy]

OK, so these are R32 springs, not R33. But shown are both GTSt (left) and GTR (right clean and dirty) front springs.

They are progressive. As are the rear ones that I didn't take any photos of. Kings, obviously enough from the colour.

Edited January 17, 2015 by GTSBoy

[tommo!]

This is a pic of one of the rears and pic of front fitted. Where would I be able to source boots and bumpstops from? Anything else I will need?

do you know of the differences between the pedders and kings springs gtsboy?

[GTSBoy]

I have no knowledge of the Pedders stuff. I have sworn black and blue that I will never use them again after one of their six-toe moron operators warped a brake drum on one of my cars about 25 years ago. Rattlegunned up the wheel nuts in circular order.

Just about any suspension supplier/workshop will be able to supply you boots and stops.

[tommo!]

Oh smart bloke wasn't he. Ok mate. Thanks

[hardsteppa]

re yellow springs pictured, see how the coil spacing is even; they are linear. See on the red springs how the coils get closer together at the top; they are progressive.

[tommo!]

Ok hardstepper thanks for clearing that up. Well hopefully the bilsteins sort the ride out.

[GTSBoy]

See how the diameter of the coils changes? Also changes the spring rate.

[hardsteppa]

I won't waste any time on this; call king springs and ask their tech dept about the spring rate of their r33 springs (as I did when looking at buying a set of their springs a while back). Couldn't remember 100% which was linear but yes it is fronts, thanks for posting pic up gtsboy.

[GTSBoy]

It's all a bit of a joke when they're pre-loaded onto a strut anyway.

By the way. I load tested them. They're 5.something kg/mm but they're not linear.

[chiksluvit]

I thought the softer part of the rear springs are meant to bind when installed with the weight of the car on them anyway? Effectively making the softer section helper springs to ensure that the springs stay captive at full droop since the rear shocks are so long

[hardsteppa]

By the way. I load tested them. They're 5.something kg/mm but they're not linear.

load-of-bullshit tested them, more like. If you did actually test them then you fu*ked up the test; cos they're linear.

See how the diameter of the coils changes? Also changes the spring rate

nope. The diameter of the coils is irrelevant, it's how much they compress under load, eg a 6kg/mm spring compressing 1mm under 6kg of load. I know this to be fact, having specifically asked King Springs, MCA Suspension, BC Australia etc this question, when asking about any difference of spring rate between the wider springs found on stock suspension and the smaller diameter coils found on aftermarket coilovers. I'm surprised you didn't know that, being an engineer and all.

thought the softer part of the rear springs are meant to bind when installed with the weight of the car on them anyway? Effectively making the softer section helper springs to ensure that the springs stay captive at full droop since the rear shocks are so long

pretty much yep, more a dual-rate spring rather than a true 'progressive' where the coil spacing more evenly changes top to bottom. You can see this on the Tein website where they list the different spring rates for the same springs. But still classed as a progressive spring.

[GTSBoy]

Varies with D cubed.

k = Gd⁴/[8nD³]

Where:

k = constant, pounds of load per inch of deflection
G = modulus of rigidity of spring material, pounds per square inch
d = wire diameter, inches
n = number of active coils, which is the number of coils subjected to flexure (always less than the total number of coils)
D = mean coil diameter, inches = Outer Diameter - Wire Diameter

You Manuel......are a waste of internet space.

[hardsteppa]

Thanks dude, you just made me $20

Let me know how you go after speaking to King, and no lying about it just to save face.