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.
The next part to receive attention in the fight against play in the driveline and associated bits is the transmission mount.
I have been running a Whiteline Transmission Mount Insert for a number of years and have been really happy with it, but it’s time to go further and just forgo any rubber and make a solid mount.
In the video below is the result, now fair warning, if you get distreesed by the sight of really BAD WELDS, do not watch!
The next Video in the Fuel Surge series is now live.
In this video I go through the construction of the wiring looms required to wire in the control box and pumps. It is not a boring blow by blow description, more of an overview with some basic principles and pit falls to be avoided.
The Wiring Diagram is also available on the Downloads Page.
Enjoy
Well, I finally bit the bullet now that I have a working twin fuel pump system and had the car tuned to run on E85.
HUGE thanks to the team at Parramatta Vehicle Services for their excellent service and knowledge. 145KW at the wheels. I`ll take that!
