Ok guys, this one might be a little different, and I just want to be sure i'm doing it right the first time so I don't have to do it again.

I'm planning a long list of stuff for my LM7. Gen 4 flat tops and rods, 862 heads ported and intake valve opened up to 2.00", 11:1 compression, 228/236 114+3 at .615 cam, headers, ported throttle body, and a 150-250 shot when needed.

Hoping to make around 375 to the tire on motor alone.

I have a 99 so the smallest injectors at only 22lb/hr. How far has someone pushed these? is this a reachable goal with these injectors or will I need some larger ones? If i upgrade, i'll probably throw in the 8.1 injectors. Is there a write up on how to scale the fuel tables for these?

Now for the pump. I am thinking about a single, in tank walbro 450. Will this be able to handle the fuel and nitrous at the same time?

Thanks

 

22lb/hr can barely support the horsepower they make from the factory. Just go straight to the 31lb 8.1 injectors. You can find all the information for them directly from a 8.1 tune if you using HP Tuners.

A 255 fuel pump will handle your needs, a 450 would be pretty overkill with no boost.

 

Will a 255 be able to handle that hp with nitrous too?

I figured that would be the answer on the injectors. At what point do the 31lb call it quits, just if I want to push this thing further?

 

Per walbro's site the 255 can handle 500hp with pump gas.

I guess with nitrous you may want more, I think the Marine 8.1 injectors are rated at 42lb/hr but you might want to research those and double check.