[Nimair.ZL1]

Originally Posted by KingLT1

LMR uses a cam with a bigger fuel lobe as Nimair.ZL1 mentioned.

A bone stock LT4 with stock fuel system will tolerate about E70.

With a low side upgrade, you can do bolt-ons(Headers, CAI, TB), X port, and run E50-60 depending on DA.

If you add a cam with a 38% lobe that extends fuel headroom up another 80-100whp. 760-780whp on E50-60.

To go further then you need to upgrade HPFP and Injectors or Go Port Injection.

The only way you might get away with Full pump E(E75-80) on stock high side, is if you did a 38% Cam, headers, cai, lowside, and run stock boost with no supercharger porting.

Port injection is also an option. This way it won't require bigger injectors or a HPFP upgrade. Is this correct?