Hey guys,

I'm new to this tunercat. I have no idea on where to go to change the injector size! Also how do I actually go in and change it on thepcm and up-load the change.... I hook it up and theirs just a ton of stuff that I dont understand. I just have to change the injector size and nothig else.

 

It's listed in the PCM Constants Table. Do a search on your injectors though as some require a slightly different setting than what they are rated for.

 

I will see what I can come up with. This thing is so confusing as to whats what. I wish I knew someone close by who can school me on this!

 

Hey 97ws6, Any idea where I can start to search? I guess you saying that a 40lb inector may have to be set at 37lbs or 42lbs depending on who makes it..

 

Damn I'm a retart! I just realized that is a schooling sesion on Tunercat right up top!LOL....

 

I'm not sure if it says in the sticky, but when you change the injector setting, you have to do a calculation first, which is what 97WS6SCharged was talking about. See Injuneer's post below for clarification.

 

Not quite.... its not a "simple ratio"... its proportional to the square root of the pressure ratio.

The SVO's are flow rated at 2.7bar = 39.15psi

To get the new flow rate at a new pressure (say 3bar = 43.5psi), you need to calculate the square root of the pressure ratio.... example:

Pressure ratio = 43.5 / 39.15 = 1.1111

1.1111^0.50 = 1.0541

New flow rate = 30 x 1.0541 = 31.62 #/Hr

You may also find that the flow ratings are "nominal".... the stockers for example, are quoted as 24 #/Hr, but they are programmed at 24.9 #/Hr.

 

Thank you for clarifying that. I've actually used this method before, but I forgot about the sqrt. I thought the SVO's were rated around 39 psi, but my caculations weren't working out. Wasn't making sense.

 

Thanks guys! Big help!!