fuel pump or injectors? which 1st?

[idt512]

im getting ready to bolt on my 14b onto my 2g and am wondering which direction to go 1st as far as fuel mods? i have rewired my oem fuel pump and have an s-afc2 (not yet installed), several said to get injectors next, others have said injectors wont be needed for a 14b and to just get a 190lph pump. Keep in mind we only have 91 octane here.

Mods:

14b ~16psi boost
2.5" downpipe
3" catback & HiFlow Cat
Greddy Type S
Injen intake
custom 2.25 uicp
FMIC (ordered already)
rewired fp

 

[joeracer321]

If your staying with a 14b then I would do neither and save your money.

 

[herostar]

deffinately fuel pump

 

[PieTSI]

deffinately fuel pump

Definately get a fuel pump with a 14b.

 

[lowridin2g]

with a 14b, definetly go with the walbro 190 lph pump

 

[jeff01]

I'd go 255 hp in case you decide on a larger turbo later.

 

[2gGSX]

I'd have to disagree with the 255 lph. While it'll obviously flow more, a rewired 190 has been ok for even 50 trimmers (~48 lbs/min). The problem is you'll have to buy an AFPR if you go 255, which to me is unneeded since I doubt the majority of us will need more than a rewired 190.

 

[joeracer321]

If he will be running moderate boost on his 14b and does not intend to upgrade to a larger turbo any time soon. Then a rewired stocker should support it well. A few weeks ago I saw a page with pump flow numbers according to voltages. You can get some good flow out of a stock pump with a re-wire. Consider the downsides of installing a pump. You can easily crimp the hardline coming out of the top of the pump, since on most of our cars the fuel line is frozen on the fuel pump assembly. and if you crimp your line, you have just shot yourself in the foot. Now you have a higher flowing pump with a lower flowing fuel system. Unfortunately that is what happened to me. But I ended up modifying the fuel pump assembly. I cut the stock feed hard line off, enlarged the hole through the top of the assembly and welded a new -6 90 degree piece of line back on. So it actually worked out for me since I did not feel comfortable with the stock diameter tube on the assembly anyhow. But the demands on my fuel system are much larger than his. So I still think, with the negative factors included along with the point that changing the fuel pump will not show any increase in HP, I would keep it stock. If you happen to get some leaning issues, that is what would create the need for the new stuff and I would start with the pump first and go from there. But untill you know if it is gonna need it or not save the money.

 

[CanadianTSi]

If he will be running moderate boost on his 14b and does not intend to upgrade to a larger turbo any time soon. Then a rewired stocker should support it well. A few weeks ago I saw a page with pump flow numbers according to voltages. You can get some good flow out of a stock pump with a re-wire. Consider the downsides of installing a pump. You can easily crimp the hardline coming out of the top of the pump, since on most of our cars the fuel line is frozen on the fuel pump assembly. and if you crimp your line, you have just shot yourself in the foot. Now you have a higher flowing pump with a lower flowing fuel system. Unfortunately that is what happened to me. But I ended up modifying the fuel pump assembly. I cut the stock feed hard line off, enlarged the hole through the top of the assembly and welded a new -6 90 degree piece of line back on. So it actually worked out for me since I did not feel comfortable with the stock diameter tube on the assembly anyhow. But the demands on my fuel system are much larger than his. So I still think, with the negative factors included along with the point that changing the fuel pump will not show any increase in HP, I would keep it stock. If you happen to get some leaning issues, that is what would create the need for the new stuff and I would start with the pump first and go from there. But untill you know if it is gonna need it or not save the money.

Stock fuel lines have supported 701AWHP.

Just put int the 190 and be done with it.

 

[herostar]

In regards to the 255 v. 190 fuel pumps, get the 190 unless you plan on making over 500hp. The 190 has supported 450awhp on a dsm numerous times.

 

[98spydert]

The install is cake if you take your time and use the right tools (line wrenchs). Don't get freaked out about other's horror stories. The 190lph will be plenty for any 14B or 16G turbo also.

edit: Also, the injectors AND pump would be nice since you've ordered a FMIC. With the front mount, the proper fuel mods and your existing mods, you should be able to run ~18psi with some tuning, even on 91 oct hamster piss.

 

[joeracer321]

I used line wrenches and it still tweaked. The fitting was on there TIGHT and it was froze up bad!!! Just be extra careful, and maybe a days worth of PB blaster.

 

[CanadianTSi]

To make the install a since on my car we just cut the metal lines and replaced them with some rubber fuel hose

 

[joeracer321]

To make the install a since on my car we just cut the metal lines and replaced them with some rubber fuel hose

Isn't there a bad possiblility of leakage with the pressure the pump puts out and I assume nothing more than a non beaded line with a worm clamp holding it, doesn't sound to safe to me, as well as those clamps losen up over time too.

 

[idt512]

:laugh: I guess fuel pump it is. How much boost can i max out with stock injectors, SAFC, & walbro 190 pump?

 

[kevingst]

:laugh: I guess fuel pump it is. How much boost can i max out with stock injectors, SAFC, & walbro 190 pump?

16-17...maybe 18 with good tuning. Anything above that and fuel cut will make you it's bi***.

 

[Batoott]

I was wondering if the 190 was as noisy as the 255? I just had my Supra TT fuel pump die on me (no idea why.. it has only been in my car for about 2 months now) and I'm not sure which one I should get. I'm looking for something that would sustain about 320whp daily and not sound like a blender in the back seat. Any advice would be appreciated!

 

[drk mrk iv]

I plan on running a 14b soon as well. I have 550's sitting in my room. Going to be too big for the turbo? Either way, get the 190 and have that rewired. Plenty nuff fuel.

 

[WhiteCloud]

You guys both need to be logging before testing how high your boost can go. Pick up a datalogger after the fuel pump, but before injectors IMO.

 

[kevingst]

I was wondering if the 190 was as noisy as the 255? I just had my Supra TT fuel pump die on me (no idea why.. it has only been in my car for about 2 months now) and I'm not sure which one I should get. I'm looking for something that would sustain about 320whp daily and not sound like a blender in the back seat. Any advice would be appreciated!

Yea, the 190 is still noisy.