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Had My Stock Bf Xr6t Dyno'd


Jman

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  • The Cleaning Dudes Ute
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Did they happen to measure how much boost it is making?

Yea, it made max power both times around 4.4psi

My first reactions were.. "yea right buddy, its just a high reading dyno"

The bloke said he had a stock BA-Turbo with an exhaust/tune (only) on it the other week and it ran 204 rwkw's on all the same settings...

I dunno

Thing is though, mines a BF 1 (Feb 06 build) I'm pretty sure it doesnt have all the toughened up internals, just some bits n pieces.

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My first reactions were.. "yea right buddy, its just a high reading dyno"

Hate to burst your bubble, but keep thinking that. your car given the correct corrections only makes approx 205rwkw which is about right for a standard xr6t BF

The bloke said he had a stock BA-Turbo with an exhaust/tune (only) on it the other week and it ran 204 rwkw's on all the same settings...

Yeah its not a settings thing, you cant change any corrections in shootout mode. But placement of the INTAKE AIR probe is what caused the problem.. But last time the INTAKE AIR Sensor did not fall against something hot and cause ridiculously high air temps changing the correction factor to the likes of 1.3

I dunno

Thing is though, mines a BF 1 (Feb 06 build) I'm pretty sure it doesnt have all the toughened up internals, just some bits n pieces.

Bog stock BF xr6 turbo with nothing done.

Ok. just done a quick calculation, at 187F intake temps, using this page http://wahiduddin.net/calc/calc_cf.htm your car is realistically making approx 205rwkw, with a correction factor of 1.171 (205 * 1.171 = 240)..

Go back to him and tell him to run the car on the dyno again, and this time put the INTAKE Air temp probe where the air goes into the filter, Not on the radiator, or somewhere excessively hot

86degreesC is excessively hot to be measured on the IT probe. it should realistically be very close to AT, Air temp of 25 as measured on the dyno sheet.

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  • The Cleaning Dudes Ute
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I dont think So!!!!

I've got two pages of tables showing psi readings for every 2k/hr increase

This is how the MAX KW LINE READS

K's/hr Power(KW) Tractive N Temp Air/Fuel Lambda Petrol VacBoost

-----------------------------------------------------------------------------------------------------------

140k 230.8 5934 83.6 11.5 0.79 4.4

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  • The Cleaning Dudes Ute
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I've got two pages of tables showing psi readings for every 2k/hr increase

This is how the MAX KW LINE READS

K's/hr Power(KW) Tractive N Temp Air/Fuel Lambda Petrol VacBoost

-----------------------------------------------------------------------------------------------------------

140k 230.8 5934 83.6 11.5 0.79 4.4

Well that didnt come out as it was supposed to... lol.

So whats sorts of air temps should you expect for a realistic dyno run?

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I've got two pages of tables showing psi readings for every 2k/hr increase

This is how the MAX KW LINE READS

K's/hr Power(KW) Tractive N Temp Air/Fuel Lambda Petrol VacBoost

-----------------------------------------------------------------------------------------------------------

140k 230.8 5934 83.6 11.5 0.79 4.4

I believe his refering to the power its shown, rather than the boost level your got..

Look at that line.. "Temp" 83.6degree's C.. The placement of the intake probe is totally wrong.

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Well that didnt come out as it was supposed to... lol.

So whats sorts of air temps should you expect for a realistic dyno run?

Look at the bottom line on the dyno graph..

AT: 25 IT:86

AT = Ambient Temp. Measured by the weather station

IT = Intake Temp. Measured by the intake air temp probe usually placed near the air feed of the air filter.

There shouldn't be any more than 3 -5 degree's difference between those values..

And sorry, just looking at your dyno again.. 230rwkw it shows, means approx 200rwkw * 1.171 = 232rwkw.. So you have approx 195 - 200rwkw.. You wont know exactly as I've approx calcualted that correction value based on the 86 air temp.. so its only a approx calculation backwards

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