Joined
·
1,033 Posts
Fresh from my weekend at SoW, I was very disappointed that I could neither siphon the fuel from my tank or do the old shunt-the-fuel-pump-relay trick!
First, like any modern car, there is an anti-siphon circuit in place. I tried various lengths and types of rubber and rigid polyethylene tubes without success. Getting the valve propped open wasn't an issue, but after feeding about 5' of tube into the car without getting fuel, it wasn't the way to go about this...
Going directly to the fuel pump was the next step, and I could get pulses from the relay to allow fuel to flow. Unlike other cars, it just wasn't a steady stream. It just isn't a good way, either, unfortunately.
I ran out of time before I could fashion something directly to the pump -- but that's next. It's not tough, but I wanted to share my experience here. Maybe it will save someone else some time.
Oh yeah, I ended up running some old 91 octane fuel and the OTS Cobb map instead of my new 100 octane Mountune "race rally" map. I have never run anything other than 93 octane maps (on 100 octane fuel) for track events, and it really changed the car. It was a real bummer since this was easily the hottest day I've ever run the car (ambient was about 102F). It just wasn't my day. Next time...
First, like any modern car, there is an anti-siphon circuit in place. I tried various lengths and types of rubber and rigid polyethylene tubes without success. Getting the valve propped open wasn't an issue, but after feeding about 5' of tube into the car without getting fuel, it wasn't the way to go about this...
Going directly to the fuel pump was the next step, and I could get pulses from the relay to allow fuel to flow. Unlike other cars, it just wasn't a steady stream. It just isn't a good way, either, unfortunately.
I ran out of time before I could fashion something directly to the pump -- but that's next. It's not tough, but I wanted to share my experience here. Maybe it will save someone else some time.
Oh yeah, I ended up running some old 91 octane fuel and the OTS Cobb map instead of my new 100 octane Mountune "race rally" map. I have never run anything other than 93 octane maps (on 100 octane fuel) for track events, and it really changed the car. It was a real bummer since this was easily the hottest day I've ever run the car (ambient was about 102F). It just wasn't my day. Next time...
