[LNICK]

LNICK, yes that's the upgraded one that I plan on using, but I still don't know the original size to compare.

I´m using only my memory so take care since I´m getting older.

For the 44HP at the crankshaft using natural aspiration the calculated flow using 2.6 bar and 90% of duty cycle gave me around 275 cc/min.

For 65HP Turbo charged with a pump of 2.9 bar and keeping 90% of duty cycle I got around 462 cc/min.
I will look for an injector around 500 to 550 cc/min since the gas here in Brazil is E27.

Here is a online calc for injectors that could help you.
https://fuelinjectorclinic.com/flow-calculator

Luis

 

[LNICK]

Not only that.. but turbo the world. I think If I went this route I would open up the gearing a little more.

This is my project car.

Is it a Toyota Supra?
Just a curiosity I don´t want to hijack the thread.
Luis

 

[LNICK]

Just to help.
RC 390 Injector

 

[LNICK]

Can find it now but apparently, there is an Italian guy/firm that does/did them.
Will post here if I find it again.

https://www.facebook.com/BragagnoloNicola/

Company, who we are and our products - Performance Technology
I´m thinking in a small turbo in the future. Why?
1 - I´m an engineer and love this kind of mod. All mods in my bike were made by myself.
2 - It can create a performance equivalent of 600cc with the size and fuel mileage of a smaller engine. The efficiency will be much better in technical vision.
Luis

 

[LNICK]

If I'm not wrong the pressure is 2.6bar until 2016 and 2.9 from 2017 and ahead.
The values are in the test procedure of fuel pump at service manual.
The flow of injector at 100% duty cycle I already got but I forgot and I can't remember where is the information.
I'm getting older.
Try to look at rc390 forum that has someone that made a performance kit with a bigger injector and they know the value for the oem.
https://www.rc390-forum.com/forum/ktm-performance/266-engine-kit-progress-9.html
Are you trying to improve the performance, who knows a little turbo?
Luis