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allwheeldriveturboboxer
'08 Mazdaspeed3
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2,469 Posts
Discussion Starter #1 (Edited)
I have noticed that at times I have hitting up to 98% duty cycle somewhere after 7k on with my Prelude injectors (OBD2 280cc)...

The B16b base map, which was tailored for my setup on the dyno, comes 'stock' set for 280cc injectors, according to the Power FC literature...so I know it is not the configuration of the injector sizing feature...

Fuel pressure is @ 36-38 w/ hose off, aem regulator with middle-sized orifice and Holley 255 FI pump. Interestingly, we did have to juice up the b16b maps quite a bit to get my motor what it needed fuel wise...could it be that I need to set a higher baseline fuel pressure and re-organize my Power FC fueling to keep the duty down?

I just find it odd, since 240cc injectors have been known to support up to 210 whp on DOHC.
 

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i still got the 240cc's on my 12:1 setup. the fuel pressure is at 50 psi with vacuum. the plugs just won't get any darker. i'm not pushing anywhere near 210whp. i hope to have some lude injectors soon.
 
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