Which fuel pump to replace the Vortechs -

Walbro 255
Walbro 190

Im 5000 above sea level and already running lean.. which one will work without buying anything else.. and can you still use the ssbox with these 2 pump?


thanks - mark

 

Assuming you have the stock vortech I believe either one would work. The question would be having to re dyno tune to make sure your A/F is correct...The larger would likely overwhelm the stock injectors resulting in possibly poor idle and at low engine load..From a fuel pressure perspective I experience a high fuel pressure with the 255 and 440injectors...Around 80psi where stock was 52psi..And yes the S.S. box works fine...But again, may have to change the fuel settings within it..

 

Mark
Are you runnning the stock Vortech kit now ? If you are and are running lean
[1] the aux fuel pump isnt turning on
[2] a simple retune should take care of it

You would think at elevation [ less air ] going lean shouldnt be a problem

 

ok -

so if i get the walbro 255 with a retune i should be ok?

mark

 

MArk ...you didnt answer the Question . If you are running the stock kit , there isnt any reason for you to go lean . I would say you have a problem that can be easily fixed with out spending money , other than what it will take for a shop to find the problem . If the car has never been tuned other than what came with the kit . You have probably one of two problems . [1] the aux. fuel pump that came with the kit isnt turning on . [2] The FMU isnt working right
Take the car to the shop and ask them to find the problem . Just dont start buying parts till you find the problem