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Synchronous hpfp control
Posted: Sat Jun 17, 2023 1:26 pm
by Gaposgarage
As of now the n54 has a async pump but its contoled with a clpwm generic output.
I recently got the s55 hpfp that has a gear driven drive for the pumps cam but, it doesn't turn at a 1:1 or a 2:1 ratio.
Looking in scal it appears on sight that the cam setup is on a 0 to 720 so i assume the hpfp cam needs 720 sync?
I don't know if this is an issue?? This is a huge learning curve for me i must admit.
Hoping someone can help put me in the right direction
Re: Synchronous hpfp control
Posted: Sun Dec 31, 2023 6:27 am
by beetos
Hi
Curious to know how you went. My N54 still uses the async pump but I am mapping much differently to the base map and it works good now. Are you converting yours to a sync pump ?
Re: Synchronous hpfp control
Posted: Mon Feb 12, 2024 3:38 am
by Gaposgarage
i ended up going di delete. ive had it with piezo injectors and almost finished with my n51 head swap, just waiting on cometic to finish the head gasket
i considered using an n55 head and seloniod di but once i got the car turned up i started destroying gs6-53bz gear boxes. i think theres better places to spend the money for now. (didnt sell the s55 pumps yet at least
)
some issues i think could need resolutions:
the vac pump sproket drives the hpfp lift cam. its not syncronous with the crank. cant recal exactly what it was but i think that sproket needs 3 more teeth to pull it off and then the oil pump timing chain would need lengthened. cant speak on the chain module but it could need attention aswell.
Re: Synchronous hpfp control
Posted: Wed Nov 27, 2024 6:55 am
by otis
Gaposgarage wrote: Sat Jun 17, 2023 1:26 pm
As of now the n54 has a async pump but its contoled with a clpwm generic output.
Stickman Hook
I recently got the s55 hpfp that has a gear driven drive for the pumps cam but, it doesn't turn at a 1:1 or a 2:1 ratio.
Looking in scal it appears on sight that the cam setup is on a 0 to 720 so i assume the hpfp cam needs 720 sync?
I don't know if this is an issue?? This is a huge learning curve for me i must admit.
Hoping someone can help put me in the right direction
You're tackling an interesting and complex upgrade by swapping the N54’s asynchronous fuel pump (HPFP) with the gear-driven HPFP from the S55. Let’s break down your challenge and provide clarity on how to move forward.