Hi Rohan & David,
Just following on from those VW Jetta (and other cars) bump rubbers we discussed. I managed to track down the part number with a UK classic VW dealer. Trawling the net I noticed there were A, B & C versions. The guy could help me with what that means. Anyway I ordered two at 7.50 Each (with Dust shield) to see what they are like. Dust shield too big but nice idea.
See Photos. As a bit of a rough experiment I have clamped them in the vice with a set of bathroom scales and managed to press them up to about 80KG before the scales gave up. At 5Kg increments I took length readings.
I also did the same with the original Aeon hollow springs. I appreciate that this is rough but must give some idea of how progressive they are and also their strength. I did this twice and got pretty much the same sort of reading.
Sorry, no software on this old laptop otherwise I could have done a little graph. Should I attempt to get more weight for more readings?
KG ------ VW Spring ----- Aeon Spring
0 ------------ 81mm ------------ 81mm
5 ------------ 80mm ------------ 80mm
10 ------------ 79mm ------------ 79mm
15 ------------ 76mm ------------ 78mm
20 ------------ 75mm ------------ 78mm
25 ------------ 72mm ------------ 77mm
30 ------------ 70mm ------------ 76mm
35 ------------ 69mm ------------ 75mm
40 ------------ 67mm ------------ 75mm
45 ------------ 66mm ------------ 73mm
50 ------------ 65mm ------------ 72mm
55 ------------ 63mm ------------ 70mm
60 ------------ 62mm ------------ 70mm
65 ------------ 61mm ------------ 69mm
70 ------------ 59mm ------------ 67mm
75 ------------ 57mm ------------ 64mm
80 ------------ 56mm ------------ 62mm
85 ------------ 54mm ------------ scales limit
So any thoughts. I fitted the new TTR (100lb) fast road springs at the back and used those short yellow poly TTR bump stops to get me back on the road. I also took your advice Rohan and got some nylon stock and cut two 15mm spacers for each side (above and below). I have not really tested this properly yet with running in the new MKF gearbox. Also still making adjustments to the ride height. That said it seems pretty good and I am not riding onto the bump stops with two of us in and half a tank of fuel under normal straight forward direction driving.
Since the springs do settle I have adjusted the perches to give an "A" frame angle of about 2 inches droop from the horizontal when the car is empty.
What do we think? Shall I try these VW ones. Notice the little 90 degree ribs between the rubber do nut bits to balance the squish.
Thanks Mike