318iS race car - back on track

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rix313
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Fri Jul 21, 2023 4:23 pm

I as of yet, haven't entered a race this year. I have done a couple of test days, one at Donington and the other at Goodwood.

Donington was good but I quickly discovered I had fuel surge that once it came on, never went away until the fuel was topped up.

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Previously I would get a splutter and I could continue for a couple of more laps before needing to stop. So I decided a swirl pot system was in order. Luckily the wiring installed when I did the loom was beefy enough to not notice the small 1.5amp draw from the low pressure lift pump for the swirl pot.

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After breaking my back doing that (not fun being hunched over the rear panel reaching into the boot) I also decided I wanted to fit an interior light to the car for the darker nights. This snowballed into also deciding I wanted toggle switches rather than rocker switches on my dash panel. As the holes for the rocker switches were much larger than the ones required for the toggle switches, I had to make a new facia panel. I was mostly able to trace the old one but I did decide to add a further spare switch to the panel on account of all 7 being in use.

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Finally fitted:

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8) 8) 8)


The Goodwood day was wildly over subscribed so I got very little track time unlike Donington which times felt like a provate test day. The track gods didn't have much planned for me that day as my exhaust manifold cracked and stopped play. I've removed it now and I am waiting for it to be repaired. Im also going to get it crack checked by an F1 buddy to make sure it's not going to throw any more suprises at me when it's refitted.

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martauto
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Mon Jul 24, 2023 3:57 pm

That dash looks so cool and explain to simple people like me what a "swirl pot" does? :mad:

Mart.
Only the E46 cab left now.
Just got too old.
rix313
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Wed Aug 02, 2023 10:28 am

It's a seperate tank to the fuel tank, only small volume which is fed by a low pressure pump and the return line from the engine. It removed the possibility of fuel surge when cornering on low fuel levels.
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martauto
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Wed Aug 02, 2023 5:00 pm

:clap: :clap: :clap: :clap:

Mart.
Only the E46 cab left now.
Just got too old.
rix313
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Tue Jan 23, 2024 6:43 pm

Exhaust gate went on far longer that it should have and is in some respects, is still going on. But anyway, finally pulled my finger out and went to Donington to shake the car down and pick up where I left off nearly a year ago.

I'm rather pleased that the swirl pot worked an absolute treat. When I did a low fuel test, the car only stuttered when I was down to 0,6L of fuel left in the system! The fuel tank was bone dry (appreciate that's not going to be healthy for the lift pump, but it was an experiment). Compared to last time when with 7L, the car was undrivable it's a great win.

Some pictures

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