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When Is The Time To Change Fuel Pump And Injectors?

335

By 335,
in Engines & Forced Induction

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335 Rising Star

335

Posted
Posted

Hello

I have a R32 GTS-T with these mods; twin front pipe, catback exhaust, fmic, pod and soon will put on a RB25 turbo. Looking at computers now. But until I buy a ecu and tune the car, with these mods when is the time to upgrade to a bigger fuel pump and injectors?

Manuel Kasko Grand Master

Manuel Kasko

Posted
Posted

My guess is the second hand pump is exactly that 2nd hand.

For the price of a new pump these days $160-$200 direct replacement why going 2nd hand?

Also its the life source of the car without fuel you will lean out and do more damage then $200 for a pump

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Why not, I got a s/h tomei and its brilliant

Thats different in a way. Its more than likely not that old.

But still i would definately prefer not to use 2nd hand fuel pumps.

I knew op was going to say a 2nd hand GTR pump.

With most things that run in fuel, once they are removed they dry up, seals swell etc etc.

HYBR3D Collaborator

HYBR3D

Posted
Posted (edited)

since you guys are talking fuel pumps, whats the limit of power for walbro 255L/h and 555nismo's on pump98?:whistling:

Pretty sure thay nicked named them Walbro 500, as in 500HP.

Basically they are generally good to 300+ wkw in most applications. Ive seen so many cars putting that power figure out, and more with only a single in tank pump.

Cant comment on Nismos one.

I brought a genuine walbro for 130 they come around cheap sometimes keep an eye out. Dont buy second hand, its not worth it when your chasing power increases.

Heres a mean set-up my mates put in is R32.4, 1200HP SX pump to keep his 420wkw gtr fed :D

post-89260-0-00153000-1332153107_thumb.jpg

Edited by HYBR3D
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Nismo will do 400rwkw

Walbro - anyone's guess. They are very hit and miss. Mine nosed over @ 270rwkw, others have run into issues at less, some have made more. Gamble you take really. Walbro's from their own information - don't like higher pressures like a Bosch/Nismo etc perform ok.

Torques Mentor

Torques

Posted
Posted

In engineering is a term called B.S.F.C

(Brake Specific Fuel Consumption)

You could use this caculator to give you an idea about fuel requirements for injectors and pump.

http://www.rceng.com/technical.aspx

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