Not sure if both posts above are by the same person or its just a co-incidence that you’re both called Barry. The second post kind of feels like a continuation of the thought process of the first post too! Either way, i’m very grateful for the thoughts given so far.
Point taken on keeping the car nimble and not having anything sticking out. I learnt this lesson the hard way in Karts many years ago, clipping a concrete block at 60mph with the extended rear axle, flipping the kart and falling out in the process. This was my motivation in wanting to find out how much I could get away with without having anything protruding past the limits of the body work!
Points also taken on how increasing spacing will effect the demands of the suspension geometry. Will ask the old man to talk to the people who’ve set the car up for us about that.
Ultimately, I feel like I’ve got two limiting factors in the car at the moment, which are more prevalent the faster the corner gets (fairly obviously I suppose). The first, and most scary issue, is turn-in oversteer. I’m aware I need to manage this better with a bit of trail braking and generally being smoother transferring the weight coming off the brakes. Its quite tricky to catch the car when it steps out on the way in to the corner and I’ve had a few seriously near misses on this one which is denting my confidence in the car. The second is the car stepping when loaded up half way through a corner trying to get back on the power. We’ve played with dampening and roll bar stiffness on this one and i’m generally happy with the balance of the car in terms of over/under steer, but I feel like there’s more to be found. Perhaps i’m being a bit naive, but I just remember adding spacing to the rear axle on the kart making a huge difference to the amount of speed I could carry through corners and was hoping to re-create that in the MX5. Perhaps we’ll pick up a set of 25mm spacers and stick them on and see how it goes.
Point also taken on the scientific approach. If I ever get a day of running in consistent weather it would be good to run the car with and without the spacers on the same track in subsequent sessions and then measure the time difference, if any, on the video footage after the event. Even if there’s not a great deal of difference in time, if the extra spacers make the car feel more stable i’d take that just for the additional confidence that would bring.
Interested to hear your thoughts on this. Thanks again.