The ongoing mission to reduce/remove driveline slop and play took another step forward recently with the installation of a Centre Bearing Lockout device from “Overtake”, supplied by Prospeed Racing. (#Not Sponsored)
As you can see in the videos, it works really well, and I recommend it. Next on the list is the transmission mount. Stay turned.
I have had some questions lately on why I run 2 fuel pumps, one on each side of the tank. The short answer is, as those who track 86’s or BRZ’s already know, is Fuel Surge.
Sustained high G cornering to the left causes the fuel to slosh away from the pump pickup, causing loss of fuel pressure to the engine. Turbo or supercharged cars, or cars running on E85 suffer even more from this phenomenon. E85 consumption in an NA car is approx. 40% higher than normal fuel. Below is a video where I simulate this by un-plugging the OEM fuel pump while the car is at idle. Watch the gauges and see the second fuel pump turn on and take over.
What you just watched is a simulation only. In reality the system operates a little differently. The second pump is only turned off by the control unit I made when the car is at idle. When on the track both pumps would be running at the same time. When one loses pressure, the other is already running and keeps the engine supplied. It works well.
Sunday the 14th of June was round 4 of the CSCA Supersprint series held at One Raceway. We took the BRZ and the Excel.
The first three sessions were held on the clockwise Wakefield Circuit, and the last three sessions were held on the anti-clockwise Shelly Circuit.
Unfortunately, the excel developed a nasty oil leak from the gearbox aera so we parked it after only 2 sessions.
The BRZ was a Jet again and I am really enjoying the grip and balance of the car at the moment. The new fuel system, gauges and low-pressure warning lights worked well and it was very interesting to see the pumps loose and gain pressure as the fuel moved from one side of the tank to the other as the turning forces were applied to the car.
The secondary fuel pump did leak from the top as the fuel sloshed up the side of the tank but I know the cause and I have the required seal available to fix it.
Even with the issue with the excel, it was still a good day.
Why do I do it to myself?
Jake and I went out to Ringwood Park for the MG Car Club Newcastle hill climb the other day and had a ball as always. I took the BRZ and Jacob gave his H6 Liberty a squirt.
I left the traction control on like an idiot which is why the car died at the start, and if you listen closely, you can hear it pulling power from me on corner exit, and as i round the right hander heading for the penultimate corner, you can see the car bauk as the traction control pulls on some rear brake. Rookie error. Full second slower when I was aiming to go faster.
Good still. Going to the next one for sure.
