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RDX Injectors

Posted: Sat Jul 11, 2009 1:48 pm
by silverspoon1996
Can I just change in the settings the current injector size to 410, and then tune a/f?

Posted: Sat Jul 11, 2009 7:54 pm
by ImAuthenticFTW
pretty much, im sure there are gonna be things here and there that will need fine tuned after the change, mostly with the a/f and idle are my guess

Posted: Sun Jul 12, 2009 3:59 am
by silverspoon1996
how do you pull 10% at idle??? 410 x 90%= 369 stock is 370cc. is this correct?

Posted: Sun Jul 12, 2009 7:40 pm
by ImAuthenticFTW
stock is 310cc

Posted: Sun Aug 16, 2009 6:46 pm
by Prizm5063
So it will automatically adjust the tables or flow rate for the new injectors? Question, in the fuel tables it states volumetric efficiency. Is this for the engine? is it adding fuel based on this number? is this volumetric efficiency for the injectors? Just trying to understand this value and what it's doing.

Posted: Mon Aug 17, 2009 9:53 am
by Spunkster
Adjusting the fuel injector size or fuel trim does nothing to the tables.

1) change the injector size

2) adjust the overall fuel trim to get as close as possible to the correct AF ratio

3) fine tune using the tables

Posted: Wed Aug 19, 2009 8:44 pm
by Prizm5063
Ok. I sort of understand you but I'm going to ask further. When you set the previous injector size, and the new injector size, what does this do exactly? Is it just a reference?

So a very possible scenario, let's say my tune is setup for 520CC injectors (CT stage II) and I want to move to 650CC injectors. would I change the old Injector size to 520 (currently set at 310), and the new ( currently set at 520 ) to 650? Or, do I set the new at 650 leave the old at 310, and then adjust the overall fuel trim by 650/520=125%? or does it go back 520/650=80%?

or am I just WAY off all-together.

EDIT: Watching the videos, I think i'm getting it now.