I have the kz software from nt project for jetting, which gives different options from different airboxes. It’s a pricey bit of software.
Short answer is yes it does make a difference.
If you would like me to run some of your setups with the different airboxes on the software, send me a pm. Just to give you an idea of the adjustments required between boxes.
can you tell us what fuel you are running with it? I suppose pump, unleaded?
Sexy😍
Is that a PCR Jaguar in the background??
Are the jetting profiles much different to the kz apps that can be found for Android or iPhone?
How close does the software get you to being at the ideal jetting on the day?
I’ve found the android app gets me near, but still needs correction on the stand.
It doesnt give you a specific jet, but you enter in your details then it will tell you what to adjust. There are a couple of graphs then to give you an idea of what to change.
I typically use jetting app first to get my start point, input the details into the desktop and adjust from there.
I haven’t had much use of the software just yet, but it gives much more varibles to adjust and compare than the apps.
Whats your carb setup?
Throttle cutaway
Airscrew turns
idle atomizer
idle jet
main jet
nozzle(in venturi) usually a 7
Atomizer
Needle
Needle Position
Floats
Float height
There’s a comparison of the nitro (Red Line) and the power airbox (Blue Line).
According to the software the power airbox leaves the engine running leaner in comparison to the nitro on the same jetting.
If you look at the graphs on the right, the idea is to get the lines as close as possible to the 1 line.
Also have a look at the air fuel ratio calcs on the bottom. The green signifes optimum jetting, blue is running lean.
I just made the switch from the nitro to the power, had to go one leaner on the idle jet and one rich on the main to get my min and max EGTs back to the sweet spot. The power box feels faster, but I can’t really see anything in my data backing that up.
Biggest change will be seen with a switch from a KG product to a Righetti (Active Airbox).
The Active leans out the top a lot and requires a considerate change in carburation vs the KG ones.
On the nt project software the power and the active airbox are very similar in performance as in they box run leaner than the nitro.
I have never tested them in real life back to back.
From my own track testing, there is an average delta variance of about 20 / 25 degrees celcius between the two. The Active “streches” the engine, as it reaches the higher RPMs in a less forceful manner. The drawback is a less full mid range vs the nitro at iso carburation.
