Hello Everyone,

I am rebuilding my 13b rated for 400whp-420whp and i am wondering what size fuel pump or injectors should i use. my plan is to run a 13b with a mild street port. i want to try and build a reliable engine capable of this much hp any feed back on turbos or ar i should use would be greatly appriciated.

Thank you

 

Walbro 255lph pump will work. Bosch 044 if you want headroom.

 

I'd be opting for something a little bigger like the Stealth 340.

 

Ah thank you for the information, i will do some research about these fuel pumps. Should i change from stock injectors.

 

You can get a 340lph for about the same price as a walbro 255lph. Stock injectos are only good for 350whp. Upgrading the secondaries to 1680cc or 2225cc will be your best option.

EB Turbo

 

For about 500bhp you are looking at about 4300-5000cc/min worth of fuel injectors, depending on how well the engine is tuned. How you want to divide that up depends on the EMS that you will be using. For example, some of them work better when all 4 injectors are the same or close to the same, while others may work better with small primaries and large secondaries. The fuel pump is going to need to supply 260-300lph (68-79gph) to the fuel injectors, which means that it will need to flow more than that at the fuel tank due to the restriction in the plumbing. Therefore, you can use one big pump or two smaller pumps. Fuel lines should be 3/8" (-6AN) or dual 5/16".

For advanced planning like this, you should really hire a professional, or otherwise just accept the fact that you will make many costly mistakes along the way if you try to muddle through it yourself.

 

Ah i see thanks again for helping me out. i will do some more research and post plenty of pictures of the building process