I've found that almost 400rwhp is the limit on a stock fuel system.

 

In my 5.3, I had the stock pump and 44# injectors @ 111% IDC, while running 10 psi. The IDC dropped to 86% on meth.

 

its all stock fuel but my charger has 2 injectors where the tb was but if i go with bigger injectors will i defeet the purpose if i dont install a fuelpump

 

you need a fuel pump for sure even if you dont spray it. many people get rid of those extra injectors and just run 8 larger injectors but that requires tuning. you could run a wet shot on top of what you have now without any tuning, just add a fuel pump.

are you running race fuel? at 10psi you most likely need it and then add a little nitrous and you need it for sure. a 35shot hit on my old 6.0/whipple prety good especialy right off the line.

 

for 10psi on a 6.0 WITHOUT n2o you NEED a walbro 255lph fuel pump and 42 lb./hr. injectors and maybe a voltage booster for your fuel pump

with n2o you might need to step up to 60 lb./hr. injectors

you really should have some tuning software to monitor your injector duty cycle

when you do the fuel pump and bigger main injectors, you wont need the 2 additional injectors that came with the whipple, they are just band-aids for a stock fuel system

 

Why race gas?

 

ya i run srait race fuel im looking 4 my dyno sheets 2 c what it was doing at the time of the dyno was with no nos but then i better do a pump and injectors i just dont wana miss with it that much cus its running pretty good dont wana worsen it and its tuned by nelson

 

whats another word 2 look 4 on the dyno sheet i cant find the idc would it b air/fuel

 

the IDC isn't going to be on your dyno sheet. you need to log it.

 

he isn't going to get away with 10psi of hot air on pump gas. at least i didn't.