2015 Audi A3 8V VW GTI Stage 3.5 fuel pump upgrade using CTS Stage 3 kit and Walbro 525 Hellcat Pump

rcnacura
rcnacura
2,956
0
Published 2019-03-28
Quick video of what I did to make the CTS 450 stage 3 fuel pump kit work and upgraded to the Walbro Hellcat 525. You will want to use a PM4 pump controller with this as the OEM controller and wires can't handle the amperage draw... potentially melting or catching something on fire - not worth it.

I also used metal "zip ties" just in case as I wasn't confident the pump wouldn't slip down from the pressure.

Used OEM fuel injector o-ring as the one supplied in the kit is too larger in diameter. If you use the Precision Raceworks kit, it looks like they have their spacer the fuel pump outlet opposite way of how the CTS has there's so the supplied o-ring might work otherwise. I wanted a tight fit so as much pressure was being pushed to the engine.

CTS Kit: CTS-FPK-004
O-Ring: 13641437476

stainless steel ties: www.amazon.com/dp/B071NYQD9H/ref=cm_sw_r_cp_apap_Y…
All Comments (4)
  • @shroomism
    How do you know if you are pushing the pump to 100% or not? Is that something you can control?
  • @donalds4602
    How much power can this pump setup support and have you had any issues with it?