Having been through another MR2 Trackday Challenge, I'm still very happy with the car, but there are a few minor things to address.
I need to re-do the piping from the turbo to intercooler, because it was blowing off on numerous occasions under heavy boost (around 27-30psi for many seconds on the straights at Wakefield Park). It's only a short section of piping in an L shape. Currently the L shape is something that I hacked together with a straight pipe and a curved pipe, with 3 silicon joiners, and the overall shape/alignment is not quite right so the joiners are over-flexed. I'll try to replace the whole thing with one custom-shaped pipe, and then have 2 silicon joiners instead (one at the turbo outlet and the other at the intercooler). I should replace the worm-gear hose clamps with T-bolt ones too, but I think the main problem is the alignment of the pipes rather than the clamps.
Another thing is my oil catch can. It sometimes fills up quite fast at the track, which is OK considering the boost level I'm running, but the problem is that I have to remove the whole catch can from the firewall just to drain it, which is slow and messy. To solve this problem/inconvenience, I'll either add a drain hose back to the sump (and ensure that I change the oil quite often), or I'll add a nipple/valve on the bottom of the catch with a drain hose so I can manually drain it by just loosening the valve.
The last problem (getting more serious) is that some of my gearbox synchros seem to be totally worn out, and some of the others are on their way out too. It's reached a point where it's getting annoying. For many months it's been very difficult to get into 1
st gear unless I'm almost stationary. Also, at the trackday challenge the shifter started grinding every time I changed from 3
rd to 4
th. I could double-clutch to get around these issues, but that's only a bandaid, plus I'm hopeless at it because my muscle memory wants me to shift 'normally' lol. I might be due for a gearbox rebuild with brand new synchros. Some of the more expensive parts may need replacing too, due to excessive wear from the grinding, but hopefully not! I'm dreading the thought of a gearbox rebuild (although I would get a specialist to do it), because there are differences between each year range of the E153 and some parts are discontinued or superseded.