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David David is offline
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Join Date: Apr 2002
Location: Houston (Clearlake), TX
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Originally posted by Rob 930
I'll be interested in your duty cycle with those injectors. I have the same injectors, but I think I had my fuel pressure closer to 44 psi. At the higher boost levels, I'm getting over 85% duty cycle. My tuner was not concerned about it, but it has me wondering. To improve it, I may have to increase the fuel pressure (or change to larger injectors, which I'd rather not do at this point). If you find yourself edging up on duty cycle, it would probably be good to raise the fuel pressure now so you don't have to re-tune later.

I found the spec for my injector at

It lists static flow to be 10.8gm/sec at 600kPa.

I convert that to be 85.5 lbs/hr at 72.3psi gauge pressure so it sounds like they'll flow plenty of fuel if your fuel pump can make the pressure.
2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 02-27-2007, 05:39 AM
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