As your conering speeds get better, or depending on track configuration, you come acrosss more long high speed sweeping turns, IME fuel starvation goes from being a dangerous (depending on where you are and who else is on the track behind you) novelty at 1/4tr tank, to a serious anoyance and even greater danger when find this occuring at the close-to 1/2 tank mark.

Put a set of sticky tires on and go to tracks with longer, carosel of high banked high-G corners, and stalling out for lack of fuel can rise to the half tank level! In addition to being dangerous, with a car that's now only getting @10 mpg at best when being consistently run at 8K, one has to constantly worry about topping the tank back up every two run sessions or so.

I am astounded by the USA dealerships blasé attitude about this. Maybe you'll get different treatment down under (I've assumed Winton is an Australian local?), but loosing power for seconds at a time in long, high speed sweepers (one of the few places one can sneak a relaively low power car past some of the high bhp vehicles one meets out there) isn't a good thing! Some of those ordF SVT and the occasional German marques seem reluctant to believe this is happens, and will tenaciously try to pick up the pace to pursue. Having your car suddenly loose all power, with no brake light warning etc. or wore, right in the middle of a pass isn't a very good, or comfortable thing. I wish Mazda would address the problem. I'm told the new Corvettes, for example, also with a "saddle bag" style fuel tank, have dual pumps installed to fix this kind of issue. If Mazda wants to sell this car as a "zoom-zoom" sports car, I think they've got to address only half a tank of gas being available on the track!

 

I guess if you are going to track the car frequently, you have to address the fuel pump issue, perhaps with dual pumps or maybe a different fuel tank configuration

 

I've just put a second pump in, now I'm waiting to get the car back out on the track to see if the solution works.

Also looking at www.traqmate.com vs. www.g2extreeme.com by Race Pak vs Race Technology's DL1 GPS ( see, eg www.actdigital.com ) data acquision system for the car. If anyone has got any information or opinions on one vs. another, or alternative systems to look at, I'm interested in opinions.