stock fuel pump lph
08-07-2011, 06:28 PM
#4
Another example is my stock system, once I hit 6.1 lbs of boost, targeting 11.5:1 AFR, that was all she wrote, the rails dropped to 52psi very quickly @ 5200rpm and never ventured there since.
If you are knocking on the 500rwhp door like in your sig, you are pushing limits and would be surprised if your AFR is at a good constant value all the way to 6600rpm and maintaining good rail pressure, none the less... your close. and on-line calculators spit out 600hp = 185lph or 50gph.
I would be surprised if it was larger than 190... Im sticking with my 190 'guess'
GM - OE pn is 19206466.
Let us know what Lindsay says..
Last edited by vmapper; 08-07-2011 at 06:39 PM.
08-07-2011, 06:36 PM
#5
And what AFR are you running? (really doesn't define pump size claiming 100hp shot).. One person could run '100 hp shot' (RWHP) or one could run '100 hp' engine... two different power levels and fuel requirements... ALSO, one could run at 13:1 AFR and the other run at 11.5:1. Again, two different fuel requirements. These are just examples..
If you are knocking on the 500rwhp door like in your sig, you are pushing limits and would be surprised if your AFR is at a good constant value all the way to 6600rpm.
I would be surprised if it was larger than 190... Im sticking with my 190 'guess'
GM - OE pn is 19206466.
Let us know what Lindsay says..
If you are knocking on the 500rwhp door like in your sig, you are pushing limits and would be surprised if your AFR is at a good constant value all the way to 6600rpm.
I would be surprised if it was larger than 190... Im sticking with my 190 'guess'
GM - OE pn is 19206466.
Let us know what Lindsay says..
Quoted from NASTYN8(fuel system guru for the fbodies) a stock pump in an fbody is
"roughly 190lph good to about 400-430rwhp"
So you can count on it at least being 190lph+ in the V. Im making JUST under 500rwhp and im on a bone stock fuel system. BTW heres my dyno sheet. Dead on 12.5:1 on motor and richened up a tad to around 12:1 on 100 shot.
Last edited by itsslow98; 08-07-2011 at 07:19 PM.
08-07-2011, 06:48 PM
#6
well, back when I owned my WS6. I tagged 460+ until the rail dropped targeting 12:1 AFR stock fuel system. So NASTYN8 can say whatever...perhaps he was talking about WITH the tiny 26lb injectos or the rare 28s some WS6's got...
So it would be the injectors the limiting factor, not the pump.
My sheet below shows the PUMP limit. 1999 WS6
If you use larger injectors like 30s you can see where the pump limits...
You can see how the AFR starts to Bounce.. so you see the rwhp fuel pressure limits....
So if you are targeting 12.0:1... hard to tell in that tiny photo, then with some rail pressure drop (Im sure you were not logging Fuel pressure), there is your 500.. again, 190lph, maybe you are right though...
It really doesnt matter. This was just my reasoning.
Nice numbers btw...
Max hp on this sheet is 477
So it would be the injectors the limiting factor, not the pump.
My sheet below shows the PUMP limit. 1999 WS6
If you use larger injectors like 30s you can see where the pump limits...
You can see how the AFR starts to Bounce.. so you see the rwhp fuel pressure limits....
So if you are targeting 12.0:1... hard to tell in that tiny photo, then with some rail pressure drop (Im sure you were not logging Fuel pressure), there is your 500.. again, 190lph, maybe you are right though...
It really doesnt matter. This was just my reasoning.
Nice numbers btw...
Max hp on this sheet is 477
Last edited by vmapper; 08-07-2011 at 07:19 PM.
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08-07-2011, 07:45 PM
#8
No problems so far at a 13.1 AFR with a stock pump and lines feeding Siemens DEKA FI11351 injectors (53.7 lbs/hr @ 58 psi).
As seen on the attached chart, the AFR is stable to the shut off point. The injector duty cycle was ~ 82% or so.
It's right at the 500rwhp threshold, although the fueling requirements are likely muzzled by the mild nature of the cam.
The 190lph figure for the stock pump is probably very close.
As seen on the attached chart, the AFR is stable to the shut off point. The injector duty cycle was ~ 82% or so.
It's right at the 500rwhp threshold, although the fueling requirements are likely muzzled by the mild nature of the cam.
The 190lph figure for the stock pump is probably very close.
08-07-2011, 11:25 PM
#9
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Fuel pump I am using the stock pump for now with the MSD external in line pump.. The V will be safely tunned with that setup for now...Mongillo Motors down the line will be upgrading the fuel system...I just thought i would get some info on the stock pump...
