First post updated with results of testing the Walbro 416 at 56 psi base pressure. Punchline is that this pump was able to supply 500 whp worth of fuel at 56 psi base pressure and 90 psi at the pump. The more I push this pump, the more impressed I become with it.

 

Yes

 

Are you using the stock fuel return line?

 

Never mind, I forgot that you are using custom wiring to the fuel pump which would allow you to use the stock return line.

 

I am considering converting the stock supply line to become the return line to attempt to alleviate the possible overrun condition. Need to do more logging to see whether the pressure across the injectors is drifting up more than a 2-3 psi during part throttle in-boost situations.

 

i know different car , i got tuned remotely , dual 416 lph ,base pressure 40 boost 25 psi 85% injector duty 599whp 471 trq, specs are on bottom.
Finally done and dynoed remotely tuned john reed .
Specs:1991 mr2 turbo , haltech sport 1000
Gen 3/4 stroker 2.2 bottom end built by hasslegren racing.
Castillo knife edge crank
Caldina 98 block reinforced ,86.5 9.0 cp pistons,apexi hg,ko arp 2000,eagle rods,arp main.
1650cc fic injectors,ats top feed rail ,all an lines to fuel tank
Walbro twin e85 pump,wired with relay to battery.
1zzfe okada coils with lgs-t brisk racing plugs
Gt35r w/.82ar Racerx ex. Manifold 46mm wastegate
Haltech p1000 -3bar gm map sensor.haltech wbo
4inch intercooler core 3"inch piping
Ats phenolic spacer
Ju jun intake manifold with ku tb
Gsc 268 s1 camshafts gen 3 head with Brian crowder springs
Fidanza cam gears,greddy timing belt.
4 inch Racerx exhaust cat back
4.5 final gear ,cm twin disc ,Cusco 2-way LSD ,crw hd axle cage kit.


25psi e85






sae cf-smoothing 5
link video.

 

I got a 2011 STI to hit 620whp in VD DJ mode uncorrected. Base pressure was 45 and rail pressure held steady at around 76 with boost around 31 psi gauge pressure. IDC's touched 90 right at 7600rpm. Stock fuel lines, just a wired pump. Not sure on ID on the specific year but all other subaru's have 5/16 ID on the lines.

I'm wondering if a single 416 could make 700 wired with -8 feed.

 

I have a 416 with -8 an feed and -6 an return hard wired. I'm putting in a new 2.4L right now. Ill be running an HTA3582r on e85 and ill see how much HP I can get out of this single 416. Shooting for 650hp

 

keep us posted , i got a remote tune so i can fix a bad rich tune that another tuner did ,i hope to retune with new tuner in person. i wanted two pumps for headroom.hopefully i can squeeze out 650-660 out of my setup safely.

this is my single pump dyno rich tune with .63ar at the time,only difference from 599whp dyno with two i had a .63 a/r and single pump 416lph
Made 530 Whp 21.6 psi e85 82 injector duty safe
single 416lph

 

What remains to be delinated (AFAIK) with the -267 (416lph) pump is approximately how much power can be had with E85 before the rail pressure begins to drop.

There is no more important question than this one, as the answer reveals the practical limit of this pump. More often than not, this requires having the car on a dyno, where FP can be monitored in real time.

 

I just tuned a car tonight on E70.

First one i've done on complete stock fuel system bar upgraded injectors and the 416 pump on stock wiring.

Went 550/470 on 30psi completely out of fuel (fuel map maxed rich, AFR climbing past 12.3)
Left it at 532/460 on 28psi with AFR's climbing from mid 11's to 12.0 once past 6500.

 

When the air/fuel ratio rises uncontrollably, the reduction in rail pressure is beyond the point where the loss in fuel atomization compromises power.

Predictably, the large pump is severely hampered by the factory wiring, which cannot support full capacity from a single, smaller 255lph pump. The 416lph unit has significantly greater power demands than a 255.

Just FYI for others who read this.

 

sorry for the thread revival, but better keeping all the info together methinks

what do you mean by this? how do you detect the stall? is the final outcome a lean condition? or is it imperceivable in AFR logs?

 

Found this thread today! Another great one from Mychailo!

Recently one of my close friends who has EVO X bought a R32 GTR and I recommended this pump to him. I guess this should be enough for a while since we have only 99~100 RON pump gas here.