Dan,
Just a quick heads-up about your injectors—dead times are usually rated at 43.5 PSI, which is the pressure they're designed to operate at. In fact, the Maxxecu data lists 43.5PSI with their dead times. When you run them at 55 PSI, the injectors have to work harder to open, and that can increase latency. It might not seem like much, but it could affect your tune, especially at idle or during transient conditions.
Unless there's a specific reason you're targeting higher pressure, it might be worth asking your tuner about it. If the injectors are designed for 43.5 PSI, sticking with that baseline keeps things predictable—and makes published specs like dead time more accurate. Just something to consider while you're at the tuners.
Dave
Quote:
Originally Posted by dannichols1474
So in my last post I had turned up the fuel pressure from 38 psi to 55 psi, saw a reduction in AFR and adjusted for it by decreasing the cell values in the VE table.
Today, I went out and turned the fuel pressure up from 55 psi to 60 psi as Scott (winders) had recommended.
Happily, the AFR did NOT change so now I can have the benefit of an improved spray pattern and know that variations in the fuel pressure well above the 43.5 psi max injector flow pressure are not effecting the amount of fuel delivered per injector cycle.
I have a dyno tune session scheduled for next Tuesday and I will report more test results then.
Living and learning....
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