is the new 2014 Iron , is it direct fuel injection ? i am not a mechanic ..
so tried looking in service manual to see if it said so ..no ..looking at how to change injectors ..again ..
sorry about the basic question ..

 

I believe it's more of a "throttle body injection" system. Here's a simple description of the types of FI systems:

http://ask.cars.com/2008/08/types-of-fuel-i.html

John

 

thanks John , been looking all over ..and i found a thread in the forum from 2014 https://www.hdforums.com/forum/ignit...ne-for-hd.html

 

No it's not direct injection, which means injecting the fuel direct into the combustion chamber of each cylinder. I don't believe that is widely available in any of the vehicles we can buy at present.

 

been reading this link , they say they have made a direct injection system for harleys ..https://www.rbracing-rsr.com/efiharley.htm

 

As far as fuel injection goes there are three types,
First came "throttle body" injection which was one injector unit for all cylinders and basically replaced the carburetor.
Second was "multi port" which had a injector for each cylinder mounted in the intake manifold (which is what your Harley has).
The third and newest type is "direct" injection which has an injector for each cylinder but they are mounted in the head and inject directly into the combustion chamber.
The Harley multi port system also features "sequential" injection which is a step up from normal multi port injection in that the injectors fire at just the right time on the intake stroke rather than the older style where the injectors just fired away constantly.

 

thanks Hotlap ....all this stuff about tuning is getting to be rocket science , that might just be easier ...

 

i was trying to understand all the stuff from RB Racing ..complicated ...but they say they have a system of direct injection ...i have no idea ...

 

giving up for the day , going for a quick 70 km ride to get a cold drink ...thanks for your help guys.

 

A huge benefit of Direct injection is that the compression ratio can be a full unit higher, for example it can be 10.5 to 1 instead of 9.5 to 1. This is due to the fact that there is no fuel in the cylinder during most of the compression stroke, the fuel is injected just before the sparkplug fires.

I'm sure our big Vee's could have more midrange torque and run cooler with direct injection.