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Old November 19th, 2008, 03:14 PM   #1
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turbo-dyno guys


curious almost all my dynos the hp graph just continuously inclines with no curve or flat spots. anyone have an idea why?
the turbo is rated to 550hp
i think 400-450 is when its most efficient
graphs are in order starting with newest to oldest

latest graph-12psi 100octane

other graphs

9psi

7psi

8.7psi

5.8psi
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Old November 19th, 2008, 03:18 PM   #2
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dude this isnt hard at all... its called torque...

hp=torque*rpm/5252

if your torque is consistent (which it is pretty damn flat) the curve is going to be well not a curve... its going to be linear because=

hp=318*rpm/5252...

its all the turbo... i can tell you by the chart... you hit full boost around 75 mph... so thats probably like 2800-3200 in 4th gear right? which means that turbo is sized pretty well... you can probably squeeze more out of it but it looks pretty much right on...
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Old November 19th, 2008, 03:19 PM   #3
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I would think thats the way you would want it. The power should come on like that with a turbo. It also looks like you have a nice aftermarket cam maybe? Looks like you reach full boost by about 3600 rpms ish?
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Old November 19th, 2008, 03:19 PM   #4
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Originally Posted by rwboring View Post
dude this isnt hard at all... its called torque...

hp=torque*rpm/5252

if your torque is consistent (which it is pretty damn flat) the curve is going to be well not a curve... its going to be linear because=

hp=318*rpm/5252...

its all the turbo... i can tell you by the chart... you hit full boost around 75 mph... so thats probably like 2800-3200 in 4th gear right? which means that turbo is sized pretty well... you can probably squeeze more out of it but it looks pretty much right on...
Beaten' to the punch.
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Old November 19th, 2008, 03:23 PM   #5
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how about this... 550hp at the flywheel (say a 20% loss or so)= 440rwhp... so your close..
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Old November 19th, 2008, 03:26 PM   #6
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Originally Posted by rwboring View Post
dude this isnt hard at all... its called torque...

hp=torque*rpm/5252

if your torque is consistent (which it is pretty damn flat) the curve is going to be well not a curve... its going to be linear because=

hp=318*rpm/5252...

its all the turbo... i can tell you by the chart... you hit full boost around 75 mph... so thats probably like 2800-3200 in 4th gear right? which means that turbo is sized pretty well... you can probably squeeze more out of it but it looks pretty much right on...
oh shit sweet lol thanks man. i didnt really know that
reps to you man
thank you sir
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Old November 19th, 2008, 03:35 PM   #7
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My turbo graph hits peak at 3,000rpm and hold 420rwhp/tq all the way to 6,500rpm shut off
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Old November 19th, 2008, 04:25 PM   #8
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quite the numbers for that v6exy
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