Could it be vapor lock ?

[tortron]

That reminds me, ine of my motorcycles used to run the fan for a few minutes after shutting it off. Wonder if it was to blow the hot air out of the fairings

[Flash]

13 hours ago, igor said:

How much battery juice does the fan use in twelve minutes? Suspect not a huge amount. Sounds like a win to me.

I'll grab my multi meter and report back next time I do a long run.

[Flash]

3 hours ago, tortron said:

That reminds me, ine of my motorcycles used to run the fan for a few minutes after shutting it off. Wonder if it was to blow the hot air out of the fairings

Or maybe to cool down the rider's big gonads.

[tortron]

7 minutes ago, Flash said:

Or maybe to cool down the rider's big gonads.

Seating position requires high and tight location

[RUNAMUCK]

4 hours ago, tortron said:

That reminds me, ine of my motorcycles used to run the fan for a few minutes after shutting it off. Wonder if it was to blow the hot air out of the fairings

The coolant/block would have heat soaked aftwr it was shut down, so the fan would have run to dissipate that heat.

[tortron]

52 minutes ago, Flash said:

Or maybe to cool down the rider's big gonads.

 

15 minutes ago, RUNAMUCK said:

The coolant/block would have heat soaked aftwr it was shut down, so the fan would have run to dissipate that heat.

Actually now I remember it had SACS

 

LOL

[440bbm]

14 hours ago, igor said:

How much battery juice does the fan use in twelve minutes? Suspect not a huge amount. Sounds like a win to me.

youll be surprised. they can definately gob the current. my 16" electric was around 25amps on high speed and about half that on low. So draws a fair amount.

[kws]

1 hour ago, 440bbm said:

youll be surprised. they can definately gob the current. my 16" electric was around 25amps on high speed and about half that on low. So draws a fair amount.

I thought they used the most current to start up and then used feck all, or is that a myth?

[440bbm]

I wasnt fast enough to check it starting but that was continuous. - they are runing twin relays from the controller both only running 30amp fuses so its obviously operating within the margin of error of those LOL 

[moparmuppet]

If it is vapor locking due to heat soak would running an electric fuel pump intermittently for a few mins exchanging the fuel do the same as running  the fan for way less Amp draw?  

Whynotboth.jpeg

[tortron]

5 hours ago, moparmuppet said:

If it is vapor locking due to heat soak would running an electric fuel pump intermittently for a few mins exchanging the fuel do the same as running  the fan for way less Amp draw?  

Whynotboth.jpeg

That gives me an idea

Maybe a legitimate use for one of these lol

[ajg193]

6 hours ago, moparmuppet said:

If it is vapor locking due to heat soak would running an electric fuel pump intermittently for a few mins exchanging the fuel do the same as running  the fan for way less Amp draw?  

Whynotboth.jpeg

Fuel is a fire hazard, a fan blowing air around isn't.

Why would anyone would pump fuel when they don't need to?

[Flash]

39 minutes ago, ajg193 said:

Fuel is a fire hazard, a fan blowing air around isn't.

Why would anyone would pump fuel when they don't need to?

That was my thoughts too. I'm already using a thermo fan so letting it run for a while after a stop not only solves the vapor lock issue, but also reduces the engine heat seeping into the cabin. And all for the cost of a little battery drain. 

[locost_bryan]

That was what MG did, with a small fan ducted to the carbs, controlled by a module that used a thermocouple switch and timer, because they were only concerned about cooling the fuel bowls and the MGC had a mechanical fan. The Maestro had electric fans, but they still used a separate small fan for the carbs (looks a bit like a PC fan).

[GregT]

17 minutes ago, locost_bryan said:

That was what MG did, with a small fan ducted to the carbs, controlled by a module that used a thermocouple switch and timer, because they were only concerned about cooling the fuel bowls and the MGC had a mechanical fan. The Maestro had electric fans, but they still used a separate small fan for the carbs (looks a bit like a PC fan).

You'd never know it looking at the Pog's one - but the stock X1/9 Fiat has a ducted fan in the engine bay to cool the stock carb.

[chris r]

On 04/07/2024 at 13:14, kws said:

I thought they used the most current to start up and then used feck all, or is that a myth?

All electric motors will have a huge inrush when they start (compared to running) but when running under load it can still use a bunch of current 

[moparmuppet]

13 hours ago, ajg193 said:

Fuel is a fire hazard, a fan blowing air around isn't.

Why would anyone would pump fuel when they don't need to?

A fuel pump exchanging the hot fuel from underbonnet could run 6 seconds every min for 10 mins, pulling maybe 3 amps (facet) so 3 amps for 1 min total vs 25amps for 10 mins for an average 300w fan. 

If bumping a low pressure fuel pump is dangerous perhaps you need to put your car over the pit.

Those little fans blowing on the float bowl look like an ideal low current solution to me.

[ajg193]

Fuel flow rate and pressure are unrelated, if the pump can provide enough fuel for a 100kW engine it will provide that much fuel regardless. 

If running a fuel pump with the car unattended was a good idea then manufacturers would be doing it and there would be no laws against having a fuel pump running when the engine is off.

As someone who has set a car on fire from a fuel leak in the past I think I am somewhat qualified to say that pumping fuel like you suggest is a bad idea. It only takes a second for everything to go wrong. 

 

Plus, adding more fuel to a boiling carburettor is just going to make you be at more risk of flooding the engine or filling the engine compartment with flammable vapour that will ignite as soon as the distributor makes a spark.

[tortron]

I would just press thr "prime" button for a few seconds when I got back in the car tbh