NefMoto > Noob Zone > Noob Questions (Moderator: turboat) > AWG fuel pump Golf 4 GTI
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Author Topic: AWG fuel pump Golf 4 GTI  (Read 1449 times)
Razorte
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« on: March 10, 2023, 07:38:54 AM »
Hi,

I am going to install a SYT410G in my Golf 4 GTI and I don't know if I should change the AWG of the cable.

The original AWG appears to be 14AWG and the SYT410G takes 12A at 3 bar.

The online tools recommend using 12AWG or 14AWG for (12V/12A), so has anyone made this modification and can help me please ?
Especially for the AWG of the original cable  Smiley
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Geomeo
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« Reply #1 on: March 10, 2023, 10:56:20 AM »
Is 12 amps stated from the manufacturer?   That sounds a bit high for a fuel pump.  The average is about half that. 
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dal
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« Reply #2 on: March 10, 2023, 11:16:02 AM »
OEM wiring is 1,5mm², that is between AWG 15 and 16.
I use 4mm² wiring for an Walbro 535 that draws a little more than 20A at high pressure (high engine load).
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_nameless
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« Reply #3 on: March 10, 2023, 11:23:32 AM »
If you want to do it proper, run a wire 12 or 10 gauge with a inline fuse block directly from the battery positive battery terminal and use a 30 amp relay to switch the power on and off. Use the original fuel pump power supply to power the coil on the new 30 amp relay. Run normally open from the relay to the new fuel pump and ground the new fuel pump to the chassis.  Its quite easy   
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Razorte
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« Reply #4 on: March 11, 2023, 02:01:34 AM »
Quote from: Geomeo on March 10, 2023, 10:56:20 AM
Is 12 amps stated from the manufacturer?   That sounds a bit high for a fuel pump.  The average is about half that. 

Yes, it is a SYT410G : https://www.glencoeltd.co.uk/pub/media/wysiwyg/Sytec/SYT420G.pdf
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Razorte
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« Reply #5 on: March 11, 2023, 02:03:17 AM »
Thanks to all, I will redo the whole circuit in 12AWG with a more important relay.

Does anyone have the wiring diagram pls?
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Geomeo
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« Reply #6 on: March 11, 2023, 07:20:15 AM »
Hmmm, .  Mosfet might be of interest:

https://www.madhu.com/content/Main/FuelPumpController
« Last Edit: March 11, 2023, 09:03:31 AM by Geomeo » Logged
dal
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« Reply #7 on: March 11, 2023, 09:22:28 AM »
Quote from: Geomeo on March 11, 2023, 07:20:15 AM
Hmmm, .  Mosfet might be of interest:

https://www.madhu.com/content/Main/FuelPumpController



How this system keeps constant differential pressure in boosted cars?
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prj
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« Reply #8 on: March 13, 2023, 08:46:27 AM »
Quote from: dal on March 11, 2023, 09:22:28 AM
How this system keeps constant differential pressure in boosted cars?
It does not, you would need to adapt the logic to monitor pressure as well as fit a pressure sensor in the manifold...
I think also this is way too complicated for someone who asks "WHAT AWG".

_nameless already wrote everything on the subject. That's exactly how to do it.
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