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Old 04-06-2010, 08:41 AM   #21
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Turbo
Volumetric Efficiency
Displacement
Restrictions (IM, exhaust, TB, piping, air filter)

In essence it all boils down to mass flow rate (lb/min).

PSI is just a relative form of pressure ratio, which is only part of the equation.

I'm currently running at 12psi...which I'll admit is fun, but not nearly as much fun as FRTfun is having. That pressure ratio at redline on a 1.6L with my little peashooter is at the far edge of the efficiency island, over the 60% line. This yields a 1.4 DENSITY RATIO which is a much better determinant of power.

FRT has more displacement, and a turbo which flows more and is more efficient where we are operating...much more efficient. If you want to start a "12psi Club" I'd be happy to join and feel like I'm awesome...but if it were a "200whp+ Club" I'm afraid I'd be excluded, like I was through most of junior high.
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Old 04-06-2010, 08:49 AM   #22
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Quote:
Originally Posted by FRT_Fun View Post
12 > 8. That is all that matters.
8>12 if you're running 8psi on a GT30 and 12psi on a MSM IHI turbo
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Old 04-06-2010, 09:23 AM   #23
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Originally Posted by Doppelgänger View Post
8>12 if you're running 8psi on a GT30 and 12psi on a MSM IHI turbo
12>8 on MY car. Which, again, is what matters to ME.
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Old 04-06-2010, 12:02 PM   #24
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Quote:
Originally Posted by gospeed81 View Post
turbo
volumetric efficiency
displacement
restrictions (im, exhaust, tb, piping, air filter)

in essence it all boils down to mass flow rate (lb/min).

Psi is just a relative form of pressure ratio, which is only part of the equation.

I'm currently running at 12psi...which i'll admit is fun, but not nearly as much fun as frtfun is having. That pressure ratio at redline on a 1.6l with my little peashooter is at the far edge of the efficiency island, over the 60% line. This yields a 1.4 density ratio which is a much better determinant of power.

Frt has more displacement, and a turbo which flows more and is more efficient where we are operating...much more efficient. If you want to start a "12psi club" i'd be happy to join and feel like i'm awesome...but if it were a "200whp+ club" i'm afraid i'd be excluded, like i was through most of junior high.


+50
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Old 04-06-2010, 01:51 PM   #25
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Originally Posted by caideN View Post
what's psi?

http://www.petsit.com/
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Old 04-06-2010, 01:53 PM   #26
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haha ^^^
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Old 04-06-2010, 02:39 PM   #27
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.8 bar?
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Old 04-06-2010, 02:50 PM   #28
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.8 bar?
eight and an eighth bar
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Old 04-06-2010, 06:14 PM   #29
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I didn't quite make it to the 12psi club last time around
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Old 04-06-2010, 08:57 PM   #30
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Tryin for 30psi this summer
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Old 04-06-2010, 11:01 PM   #31
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Tryin for 30psi this summer
And your givin me a ride!!
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Old 04-07-2010, 12:00 AM   #32
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Me first
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Old 04-07-2010, 01:59 AM   #33
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224 kpa
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Old 04-07-2010, 03:18 AM   #34
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Will be there mid next week once I install the clutch....I hope
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Old 04-07-2010, 03:45 AM   #35
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Started and broke in the new buid today, loved 7 psi and is begging me to join this club after i fix the pass side wheel bearing.
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Old 04-07-2010, 08:31 AM   #36
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No worries, you will get a ride, I just have to make it out to one of these meets when the cars finished.
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Old 04-07-2010, 12:35 PM   #37
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lol
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Old 04-07-2010, 12:44 PM   #38
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Quote:
Originally Posted by stranges12712 View Post
Tryin for 30psi this summer
I might try and join you.
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Old 04-07-2010, 12:47 PM   #39
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DAMN you guys are nuts

only cars I know of running that kind of boost (and more) are dsm's, evo's, and supras
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Old 04-07-2010, 01:02 PM   #40
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Originally Posted by 18psi View Post
DAMN you guys are nuts

only cars I know of running that kind of boost (and more) are dsm's, evo's, and supras
Yeah, and twice the horsepower.
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