I'm running a b16a2 turbo, looking for 350hp when I get it mapped.
Will an6 fuel lines and fittings (to and from the rail) be ok for this amount of power?

I'm running a walbro 255 and a bosch 044 in series. Aem fpr

I'm obviously worried about running lean, but will this be ok?

 

You can make 350 on stock lines wtih a single 255 pump. What injectors do you plan on running?

 

Running denso 550cc injectors from a RX7.

 

Stock fuel lines are usually good up to around 500whp give/take.

Also as stated above, a single Walbro 255lph will have no problem getting you to 350whp. No need for the 044 pump at all.

Your injectors are abit small. 550's will work, but close to maxing out depending on what base pressure they will work best with. To have some ease of tuning and accuracy you want to aim abit larger. In the 750cc range. That way you can keep your base fuel pressure around a normal 50-60psi.

 

I would leave the 044 out. it is unnecessary at that power level.

 

I'm running 750cc w/ walbro 255 w/ -6an lines, car is tuned up to 398hp at base fuel pressure. No problems.

 

I read that the walbro is less reliable than the bosch.

Are there any downsides to running 2 pumps? Surely you can never have too much flow? (I might invest in a swirl pot and use one of them as a lift pump)

I'll definitely look into bigger injectors too. The denso 550s run at 43psi standard.

 

What you were reading was false.

Thousands of members on this site aswell as thousands not on this site, run Walbro 255 in-tank pumps well past 450whp without having any issues.

 

yes for that hp, its completely unnecessary to run 2 pumps.

 

It's an inline walbro!

Will it hurt me to run 2?

 

Ah... that changes things.

I would not recommend running a factory (in-tank) pump. Then an aftermarket inline pump, people have done it in the past. Times have changed.

Just doesn't make sense. Why run 2 pumps when you can safely and easily run a Walbro 255 in-tank replacement pump that takes all of 20 minutes to install, is plug & play and push well past your power goal before an upgrade is needed.