Power Loss at Elevation

JARblue

Doesn't sound too far off to me. The Z is pretty efficient NA. You'll have to spend a lot of money to get anything remotely noticeable in terms of power increase. I'm well over $10K in mods with about 10% hp increase from stock

Also, why do numbers even matter? How does the car drive? Do you enjoy it?

If the answer is no, you should sell it and get another car that fulfills your needs. Let someone else who might actually appreciate your car enjoy it

__________________

krazynismo

i really like the 370z - i love the looks and the way it drives. the two tone nismo in white in my opinion is one of the best stock looking cars of the times. it seems every car company started using red accent stripes after the nismo!

i have some friends with some modded cars - mostly 4 cylinder turbos, but the occasional V8. i want to be quick enough to run with them is the reason for upgrading. cruising thru the canyons there is no need for more than 305whp for sure.

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

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.

Attached Images

	IMG_20210703_111358851.jpg (530.3 KB, 11 views)
	IMG_20210703_104655577.jpg (518.6 KB, 13 views)

__________________
'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.

__________________

浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

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