Selection of injector Nytro

I believe these are the ones that MCX uses in their 270 kit (17lbs boost).

Bosch 440cc/42lb

Increasing injector size is only one piece of the puzzle as I'm sure you are aware, upgrading the fuel pump will depend on your end goal. Those 440's will go 270 hp but you'll have to upgrade the fuel pump. What is your target? What kind of fuel do you want to run? Pump or AV? What altitude are you riding. 6-7 psig doesn't require an intercooler but a charge tube won't be sufficient under certain conditions. If you want 240 ponies or more on pump gas head shim, fuel system upgrade and intercooler. If you plan to run av you can hit that at lower boost pressures especially in lower elevations, but head studs would be a good idea.

if you simply install larger injectors in the sled it will run richer everywhere. Injectors are controlled by the ECU with a specified Injector pulse width. If the injector is larger with the same pulse width it will deliver more fuel. It is always best to add secondary injectors so as to not mess with the accurately tuned stock system. The mcx box and low boost setups simply accommodate the higher boost by altering the injector pulse width when the map sensor see the pressure go up.

Long story short is yes you can change the injectors but the map should be adjusted to accommodate the new flows from the injectors. I know you wont want to hear this but if you want to go to higher boost you should install secondary injectors and run a different fuel controller. you will also need an upgraded fuel pump. We have all this stuff if you aren't sure what to buy or where to get it. We are sled shop and build custom setups. Also we have built our own fuel controller so I am very familiar with how to adjust for different injector setups. Feel free to call us if you like I'd be very happy to help.

Thought I'd give you a sneak peak on the box we've been working on, this would work perfect for what you want to do. See vids. Hey I forgot to mention if you go above 8Psi you need av or race fuel mix.. IMO.


https://www.youtube.com/watch?v=c9_LPz8X_F4

https://www.youtube.com/watch?v=tcEDouGH1S0