LPFP support for HPFP rail pressure

[NoGuru]

Thanks. I was hoping you wouldn’t say that haha. What are some ways to tell if the stock regulator is going bad?

Long cranks.

 

[martymil]

Wild pressure swings on the lpfp rail

 

[ShocknAwe]

Wild pressure swings on the lpfp rail

Like. How wild we talkin'.

 

[martymil]

Starts of small then up to 40 to 50 psi under full load

 

[houtan]

Wild pressure swings on the lpfp rail

Living the e series n55 life so I’m screwed there.

Long cranks.

Long cranks I can monitor though haha.

 

[fmorelli]

I found the ekp2 has a hard time controlling the LPFP pressures smoothly, switching to ekp3 on my 335 smoothed everything out.

No problem for the ekp3 controlling the 535 pump with no active cooling and in one of the hottest climates on earth.

It's easy enough to change. I'd swap the pump and see how it goes. If you end up seeing control issues like Marty, then you can always look into doing the EKP swap after.

Filippo