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| oem springs rates http://www.gt4dc.co.uk/forum/viewtopic.php?f=13&t=2313 |
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| Author: | datajon [ Wed Mar 12, 2008 11:36 am ] |
| Post subject: | oem springs rates |
Reading taken from st205 front & st185 CS.front & rear. Please note all springs still had good amount of paint, which mean they were not totally knacked .. 
I have the data table if need can post up, just remember that this is my handy work, not something stolen from another site. |
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| Author: | two_OH_five [ Wed Mar 12, 2008 12:01 pm ] |
| Post subject: | |
Hmm, Interesting info Jon, thanks for sharing. I'll bookmark this somehow or other to preserve the info Looks like 185 springs might be a good upgrade over stock 205 fronts 
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| Author: | two_OH_five [ Wed Mar 12, 2008 12:07 pm ] |
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Now making an appearence in the post wiki http://www.gt4dc.co.uk/website/workshop/pwiki.php under the title Suspension Information Hopefully any other tech info can be added to this over time to build up a nice library
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| Author: | Kris [ Wed Mar 12, 2008 1:16 pm ] |
| Post subject: | |
DJ - do you have a kg/mm figure for the above springs? I feel that this isn't a direct comparison of the actual affect of spring rates between the 2 cars since the 185 has the conventional McPherson Strut and the 205 has Superstrut... Will be interesting to see the spring rates for 205 rears 
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| Author: | Diceman [ Wed Mar 12, 2008 2:02 pm ] |
| Post subject: | |
What really surprises me about this info is how linear they are for supposedly progressive springs. spring rate based on 50mm deflection = St205 front - 2.45 KG/mm St185 front - 2.52 KG/mm St185 Rear - 2.2 KG/mm So very low compared to the 10KG/mm TRD coil-overs! I have had a play around fitting std st185 & st205 springs to the others struts and top mounts a couple of years back and IIRC the rears did not sit right at all - can't remember about the fronts. (maybe I didn't try them!) Good info DJ, a lot more technical than my stick a sack of spuds on the spring and measure deflection to see which deflected most. My results suggested that ST205 springs were stiffer ( lookinga t your graph at circa 25KG = sack of spuds this would just be the case). Interesting that ST185 has greater rising rate of spring as you get more load. I intended on measuring the coil wire dia, coils per inch and the oustide of coil dimension to calculate the spring rate. Unfortunately this was shot to pieces when I looked at a spring and realised they were rising rate! Another case of armchair engineering not applying in the real world! |
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| Author: | datajon [ Thu Mar 13, 2008 2:49 pm ] |
| Post subject: | |
Will run better test, just oem toyota springs require an offset base, will preform a 0 - 500 kg load test now they cannot escape. Don't have a 205 rear spring to hand, all gone to scrap man. valve springs table too, will up load |
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