Power Loss at Elevation

SonicVQ

When you post the dyno sheet, we can see what your HP/Torq is corrected for elevation (pressure), temp and humidity.

Most dynos use the "STD" correction factor which adjust the conditions to sea level, dry air (0% humidity) and 60F. That's why most correction factors are almost always above 1.

Your dyno operator might of given you the RAW / actual numbers...

krazynismo

i should have attached the dyno sheet file to this message. SAE correction factor shows as 5.

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__________________
'14 PW Nismo
Z1 CAI, Z1 HFC, Z1 Ported Upper and Lower Intake Manifold
DC Sports Stainless Headers, JWT C1 Cams, UpRev Tuned

SonicVQ

The dyno sheet doesn't show a correction factor number... It only says the correction factor (CF) is SAE, and that the graph "smoothing" is 5.

Here is the problem.... there are two correction standards for SAE:
SAE J607 and SAE J1349.

Generally the J607 (aka STD) is about 4-5% higher than the J1349 standard.
This is due to it factoring in about a 15% loss due to friction.

The dyno results are just numbers on paper. It is very difficult to get accurate and repeatable chassis dyno numbers and on top of this, each engine is a little different.


If the car feels better after the mods, then all is good

If you can post the logs, I will have a look at them... I am curious how the elevation changes things.

Rusty

Your before numbers are on pare for a stock Nismo.

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krazynismo

ahh I misunderstood when I originally replied so I edited my post. sorry for any confusion. really appreciate all the replies here thank you guys

__________________
'14 PW Nismo
Z1 CAI, Z1 HFC, Z1 Ported Upper and Lower Intake Manifold
DC Sports Stainless Headers, JWT C1 Cams, UpRev Tuned