Official TVS Thread!!!
03-31-2013, 03:31 PM
#5376
humidity change? no answer. Not gonna call anyone. just asking the question, and at some point you folks gotta accept that asking a question doesn't mean questioning the results.
I understood a pulley change , missed the blower change. re read. thanks
FYI air density variation makes a huge difference in both power, fuel economy and even aerodynamic downforce. huge.
https://www.brisbanehotairballooning...r-density.html
Last edited by Powell Race Parts; 03-31-2013 at 03:44 PM.
03-31-2013, 03:47 PM
#5377
"The atmospheric pressure, temperature and humidity all affect the density of the air. On a hot day, or at high altitude, or on a moist day, the air is less dense. A reduction in air density reduces the amount of oxygen available for combustion and therefore reduces the engine horsepower and torque. For tweaking the fuel/air mixture, or predicting engine power, the air density is the most important consideration."
Engine Tuning Calculator - using relative humidity
Engine Tuning Calculator - using relative humidity
03-31-2013, 04:18 PM
#5380
I don't know what you want me to say. I cannot control the weather. The time is listed on each run, blower was swapped in 1/2 hour. I could not get the runs any closer together. That's what correction factors are for, which were used in this graph.
These results were posted and nit picked apart on Facebook. You know what I'm talking about.
We are friends. And i want it to stay that way. This was only re posted cuz it was asked for. That's why I simply said not gonna bicker about it.
It is what it is. Done and done.
These results were posted and nit picked apart on Facebook. You know what I'm talking about.
We are friends. And i want it to stay that way. This was only re posted cuz it was asked for. That's why I simply said not gonna bicker about it.
It is what it is. Done and done.
Last edited by armcclure; 03-31-2013 at 04:29 PM.
04-03-2013, 10:05 AM
#5386
that made my dayThe description for each run gives blower details.
2 runs stock 2.6 laid almost identical on top of each other
Next pull ported m62 w/ 2.6
Then ported m62 w/ 2.5
On the last pull (ported 2.5) iat2 only rose 10* start-finish
Only reason I posted it in here was blairwolf asked for a video/dyno of zzp s2 cams.
04-03-2013, 11:34 AM
#5388
04-03-2013, 04:45 PM
#5392
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04-03-2013, 04:53 PM
#5394
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04-03-2013, 09:17 PM
#5396
haha. thats the problem with open air dyno's. Not saying your ported pullied blower did nt do just fine. It did. Good for you. But I am just saying that air density and humidity are big changes that affect power. Bigger than perhaps you considered, and 10 % change in humidity in an hour is a huge swing.
