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R33 Gtst Suspension

tommo!
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tommo! Apprentice

tommo!

Posted
Posted

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

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GTSBoy Grand Master

GTSBoy

Posted
Posted (edited)

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.

post-66906-0-73327100-1421467164_thumb.jpg

Edited by GTSBoy
GTSBoy Grand Master

GTSBoy

Posted
Posted

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.

hardsteppa Grand Master

hardsteppa

Posted
Posted

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.

chiksluvit Experienced

chiksluvit

Posted
Posted

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 Grand Master

hardsteppa

Posted
Posted

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 Grand Master

GTSBoy

Posted
Posted

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.

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