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walbro 190 lph

Discussion in 'Forced Induction' started by 99sidude, Jun 18, 2007.

  1. 99sidude

    99sidude Moderator Moderator VIP

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    I currently have a walbro 190lph pump in my gsr hatch. I am planning on some sort of power adder in the near future, and I notice that most people run the 255 lph pump. I know that the 190 is an upgrade over stock, but how much power (ballpark figure) will I be able to make reliably on this pump?
     
  2. silver

    silver Senior Member

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    Ask and you shall receive...

    A 190 lph pump without hardwiring can have its flow calculated by plugging into the equation y=176.43/[(1+.000613550e^(.1010873x)] where x is total fuel pressure (base + boost if you're running a 1:1 rising rate regulator like most people) and y gives flow in lph. At 43 psi base fuel pressure (what most injectors are rated at), you'll flow 145.11 lph at 15 psi boost, which from what I understand is about the max Honda guys can run due to the metering setup. In that case, the pump itself will be good for 2418.5 cc/min of fuel, or roughly 600 cc/min of fuel per injector. Running 85% IDC max on a set of 600cc injectors with pump 93 and an AFR of 11:1 will support 37.5 lbs/min of fuel, which is good for over 300 whp (closer to 320-330).
     
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  3. 99sidude

    99sidude Moderator Moderator VIP

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    great info... thanks!
     
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