Fuel starvation during cornering?

[dre99gsx]

I just don't think the siphon can work when the fuel in the fuel line gets interrupted briefly - it needs a steady flow on the suction side for the venturi to work.

I'm sorry you experience it as well, but hey, we have a solution. Indeed, a second pump works, and it didn't take me long to get in there and install the items. At least for wiring, you don't have to do anything special.

I wish I took more photos but if you need some mental help if/when you decide to do it, let me know.

You will need a video camera to look in there. I used this to help me see what I was doing:

DEPSTECH Dual Lens Endoscope, 1080P HD Borescope Inspection Camera with Light, Split Screen

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

It was some cheap endoscope with good lighting.


Side note, I'm glad someone else on this forum is actively racing their Z4 and is on here sharing their experience. Feels like we are a rare bunch on here but it helps keep these things going!

[F360C]

Originally Posted by dre99gsx

UPDATE: Fuel starvation seems to be fixed. Specific corner(s) on lightning where the issue would manifest itself over and over, are gone. Matter of fact, I ran a few sessions on nearly 1/4 tank with no fuel starvation!

1. Added a Walbro 255lt/hr fuel pump attached to the current fuel pump canister
2. Routed the inlet (that white barb nipple at the bottom of the pump) over to the driver side via a Hydramat (smallest I could find). I had to use a mini camera to see all the way in side the tank but slid the hydromat as far down as possible. NOT an easy task and requires patience and some strong neck muscles! Used submersible fuel hose to attach it. Magents under the tank to keep the hydramat inplace, although it will barely move as it is.
3. Walbro pump wiring is simply T'd off the current fuel pump wiring. The Walbro is never run at high pressure, so the current draw is very low even when it's running 100% of the time.

Installation is such that I can insert/remove the 2nd pump fairly easily with AN fittings and submersible hose everywhere.

No increase in fuel pump noise inside the cockpit.

I am going to have to put this on the list for an end of the summer project. I am running Limerock on July 2nd so going to be interesting to see how it handles all those fast rights.