Treadstone SE-R/Spec V turbo kit - Page 9 - Nissan Sentra Forum - B15, B16 and B17 Sentra Forums
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post #121 of 127 Old 08-07-2007, 07:03 PM
pio!pio!
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and how much hp can ~100lph support?

and is that 52psi of the stock fuel system..relative to atmospheric or to vacuum?

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post #122 of 127 Old 08-07-2007, 09:48 PM Thread Starter
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Quote:
Originally Posted by pio!pio!
and how much hp can ~100lph support?

and is that 52psi of the stock fuel system..relative to atmospheric or to vacuum?
52 static, it doesn't take into account manifold pressure.......

if you run a return and a 1:1 rising rate, most people are going to run a base of 35-45 psi, so even with the 1:1 increase at 10 psi it'll be around stock pressure.

1 LITER of gasoline weighs 1.6253 lbs. So at a 12:1 AFR you have 12 pounds of air to 1 pound of fuel.

100/60 gives you lieters per minute: 1.67 liters per minute

13.5 cubic feet of air = 1 pound

1.67 x 1.63 = 2.7221 lbs of fuel per minute

2.72 x 12 = 32.64 lbs of air per minute for a 12:1 AFR

32.64 x 13.5 = 440.64 CFM at 85% duty cycle w/ 499cc/min injectors

the QR25 is 152 cubic inches so at 100% volumetric efficenty it flows 72 cubic inches per revolution. 72 cubic inches = 0.042 cubic feet

6250 rpms x .042 = 262.5 CFM at redline and 100% VE

440.64 / 262.5 = 167% VE

so enough air and fuel to run the motor at 167% VE

I'll let you do the calcualtions for the other injectors.

How much power does the QR make 167% VE, I don't know?

oh my god, slow down
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post #123 of 127 Old 08-07-2007, 09:50 PM
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Are you taking into account differential pressure? If you're running 7-8psi without a rising rate regulator, you lose some of your flow capacity while you're in boost.

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post #124 of 127 Old 08-07-2007, 10:31 PM Thread Starter
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yes, I used the LPH calculation from post number 120, assuming they were correct

oh my god, slow down
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post #125 of 127 Old 08-11-2007, 08:36 AM
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And will the kit also come with the "Treadstone" decal for the engine cover? Looked nice on the pics from the website.
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post #126 of 127 Old 09-17-2007, 02:36 PM
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free decals to everyone...
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post #127 of 127 Old 09-29-2007, 12:56 AM
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ok guys, were dropping the complete kit price down to $2999 and offering free shipping in the US to the next purchase!
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