I've never had issues with genuine walbro pumps, took me well over 500hp reliably on several vehicles.
Got my Walbro Hellcat 525LPH in last night, there's definitely been a noticeable change in how the car behaves. On the FPR side, I had it set to 3bar with my stock pump in, the 525 instantly shot it to over 60psi with the same settings.
Walbro 535 LPFP fitted in the stock bucket with the factory venturi system.
Walbro 400lph is what I ended up going with on my 76mm turbo car, with 60# injectors, was perfect for over 25k miles at 15psi making 750whp. I installed the Walbro in the stock bucket, modded.
I went that route and haven’t had any issues, a cold snap of -28f finally did mine in a few years ago after hitting 300k.
I had my inline pump next to the fuel filter and it was way too noisy, ended up moving it to the engine compartment and fitted it inside some 3" tubing with insulation around it, just a slight whine at idle can be heard and none as you are driving
since the original pump (aged) is hardly safe over 200whp imo; esp with increased rail pressure.
I bought an “Airtex” brand pump from RA a little less than two years ago. It was starting to fail so just replaced it. Two years is too short.
I have a high flow Walbro unit that I regret installing because of the constant noise it makes. Unless you need to support super high HP numbers with a modded engine, go with an OEM fuel pump. I will just have to live with my loud pump because it is way too much work to drop that tank again!
I personally wish I went with a non walboro option for what it's worth. Just annoying loud on low tank.
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