I used the stock flex fuel injectors with my mp112 install. I believe they are 38lb. injectors. Will you be installing the Magnuson 42 lbers or staying with the stock ones?

 

 

If they are calling for 42lb injectors thats what I will go with . the last thing I would want is to go lean because of the lack of fuel. Also I would think that thats how the tune will be done with the 42lb injectors.

 

If you bought the kit that is made specific for flex fuel vehicles, it will not include the fuel injectors or fuel pump. Also the tune will be set up for your stock 38lb. injectors. Flex fuel vehicles have a higher capacity fuel pump stock and the 38lb. injectors will support a stock 3.4" pulley just fine. Mine is running fine with a 3.3" pulley.
There is no difference in price between a non FF mp112 (that includes 42lb injectors and fuel pump) and a FF kit that does not include these costly items. I could not find anyone at Magnuson to explain this reasoning to me so if buying new, I would buy a non FF kit and install their larger injectors and set fuel pump aside or sell.

CONGRATULATIONS!!!

Keep your wallet handy your addiction will only grow.

 

those stock 38 lb/hr injectors will flow 43.8 lb/hr at the Vortec's 58psi of rail pressure.

peace
Hog

 

Or 114.47, right?

 

exactly

 

Thanks for the info guys ,that is good to know.

 

Hey guys , I just got the system deliverd by UPS today and I am looking at it and see that the system is already set up with the fuel rails and injectors on it ? I also got the magnavolt kit as well. How do I know what injector I have with this kit ? They are all black with a blue ring on the bottom.

 

they are the right injector for the kit, no worries