suspension in more detail
Ideas for MGF suspension upgrades?
The MGTF was launched in early 2002, with much lauded improvements to it's chassis. In fact, I was one of the many people who were extolling the new car's virtues: it really is a very confident car to drive hard. One of the areas that received the greatest attention was the suspension system - and that is what is of interest to me, especially in terms of upgrading my own MGF. What parts are interchangeable, and what benefits are there in fitting these parts?
Thanks to Mike Satur for allowing me to photograph parts of his TF.
|Pictured left is a diagram of the MGF rear
suspension system. In colour is highlighted the anti-roll bar and ARB link. Also note the
rear tie-bar link and lower suspension arm: these are the areas that have been most
modified in the MGF's transition into the TF.
|Pictured to the left are the rear
suspension links of the MGTF. Here we can clearly see the anti-roll bar. Note that the
suspension link is similar to the MGF item, but for a slightly different profile to ensure
clearance around the top king-pin, and that the anti-roll bar link is longer, and appears
to be cantered forward by about 10 degrees (rather than vertical on the MGF). The ARB's diameter
has also increased by 1mm (both front and rear).
Compare this picture with the two views of the MGF rear suspension ARB (in this case, on Jerry Flint's MGF Trophy). Note that whilst the TF ARB link bolts to the outer surface of the ARB, on the MGF it is on the outside. The MGF link is shorter, but is mounted onto the stub axle higher than on the TF. It is difficult to judge whether the TF link is, in fact, longer than the MGF item from these images. I'd estimate that it is - but this needs some measuring up...
|Here (left, top) is the same TF
suspension but viewed from side on. The foward lean of the ARB link is more clearly
demonstrated, and the longer length of the TF ARB can be seen.
This view also shows how the rear tie-bar of the MGF has been ditched in favour of this more substantially engineered affair. No rubber compression washers in this design!
|Compare the above to the MGF rear suspension links (left) - very much thinner rear tie-bar, and note the shorter ARB link, with its much less marked forward-inclination.|
|A front quarter view of the rear subframe,
seen removed from the car. The blue coloured cylindrical part on the subframe is the
subframe mount to the TF's monocoque - and appears to be identical to that used on the
MGF. The coil-over dampers are extremely compact, and are mounted into turrets welded onto
the subframe. The subframe itself appears to be dimentially identical to that used on the
MGF. A surprising observation is that the new 'tie-bar link' appears to be bolted onto the
subframe, prompting thoughts that this link could be bolted onto an MGF
More investigations are required, but I think that there may be possibilities here for a hybridisation of MGF and TF parts, which could result in a very interesting car...
|What I haven't yet got good photographs of are the lower suspension links. On the TF, these are very much longer than those on the MGF. On the TF, they are mounted from the centre of the subframe, whilst on the MGF, these are pivoted from the edges of the subframe...|