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Originally Posted by parish8
I love it. Some actual technical information on the fuel system.
That zl1 is also running meth so it is hard to say exactly the stock zl1 fuel system can handle.
It is hard for me see how the $500ea injectors would get you any farther than a lt4 injector. I expect even the modified hp pump to run out before the stock lt4 injectors. Maybe once you get the lash cap and modified lobe that changes. Time will tell on this one. My plan is the $1500 hp pump with stock lt4 injectors and a serious low side upgrade.
With 340deg of crank rotation at 6500rpm you should have over 8ms of spray time. Just like above I have no personal experience but hope to soon. I hear some people say to not go over 6ms and other that say 8ms is the limit.
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That's what I'm heading to with the Camaro, Big Bore HP pump, LT4 injectors, and a low side upgrade (boost a pump or new intank) The HP DI pump is a positive displacement unit, so it's not critical to maintain a specific low side pressure, just enough so that you don't cavitate the inlet of the HP pump. Fuel is essentially incompressible so trying to run a high inlet pressure on the low side really won't buy you much.
I agree on the Injector max PW, but although the calculations say that, I was unable to achieve it. Once I hit about 6.9ms it's all over and it will start missing. I have found some places to improve with SOI (start of Injection) and EOI, but nothing groundbreaking so far.