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Author Topic: S4 2.7 - Estimate power&torque from boost?  (Read 3345 times)
idzioch
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« on: January 23, 2017, 02:11:33 PM »

Hi,

This is my LDRXN "converted" to bar.
Can someone estimate a power and torque from this?
It is enough to achieve for example ~ 400hp&580nm?

440cc injectors
rs4 intercoolers
k03 hybrid turbos
rs4 clutch&pressure plate
pipercross air filter
max rpm 7000
2.5" downpipes
pre-cats&cats delete
2.75" resonated single pipe catback

rpm   boost
2500   1,24
3000   1,27
3500   1,30
4000   1,30
4500   1,30
5000   1,30
5500   1,26
5800   1,20
6000   1,19
6500   1,15
6800   1,05
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nyet
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« Reply #1 on: January 23, 2017, 02:16:37 PM »

No.

Log and use hp/tq calc or dyno.

Timing and fueling will have a significant effect on tq/hp

Not only that, but absolute hp/tq numbers from a dyno are actually meaningless anyway, they should only be used for measuring gains relative to a baseline reading.
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
Khendal
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« Reply #2 on: January 23, 2017, 02:28:26 PM »

Hi,

This is my LDRXN "converted" to bar.
Can someone estimate a power and torque from this?
It is enough to achieve for example ~ 400hp&580nm?

440cc injectors
rs4 intercoolers
k03 hybrid turbos
rs4 clutch&pressure plate
pipercross air filter
max rpm 7000
2.5" downpipes
pre-cats&cats delete
2.75" resonated single pipe catback

rpm   boost
2500   1,24
3000   1,27
3500   1,30
4000   1,30
4500   1,30
5000   1,30
5500   1,26
5800   1,20
6000   1,19
6500   1,15
6800   1,05

Tell me :

rpm max
boost pressure
cc exactly of the motor
fuel type

 Tongue
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idzioch
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« Reply #3 on: January 23, 2017, 02:47:38 PM »

No.

Log and use hp/tq calc or dyno.

Timing and fueling will have a significant effect on tq/hp

Not only that, but absolute hp/tq numbers from a dyno are actually meaningless anyway, they should only be used for measuring gains relative to a baseline reading.

Ok. It's time to test on MAHA... i'll post the results Smiley
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