MaroonMonsterLS1

Ok guys, quick question. I plan on getting a new cam this summer, details below.

5.7 LS1, stock heads, stock intake and TB.
New cam will most likely be
231in/239ex @.050
113LSA w/ 617in/624 lift

Also plan on getting dual springs, and the trunion upgrade just to be safe.

I know i know not much of a fueling/injection post but...with this setup, would it be necessary to get larger injectors? Or will the stockers work and still keep my engine safe when i run her hard?

Grady

roastin240

iTrader: (13)

When your tuning, watch your injector duty cycle, and most importantly a wideband lambda meter. You will know right there if you are running out of fuel. But generally no the stock injectors can get you to 400WHP and you wont be making that with just a cam and a couple bolt ons.

MaroonMonsterLS1

Awesome, good deal. No i don't think i'll hit 400HP but i sure wouldn't argue with that number! haha

What is a healthy duty cycle? Measured by percentage of load correct?

ZL1Killa

iTrader: (17)

you will be fine with the stock injectors. FYI, they are 28.8LB/hr AT 58psi.(*pending your model year car-google/ls1tech search will help you determine this)

I would advise upgrading once you are steadily up at 95% duty cycle.

It is also important to remember this: the stock FUEL PUMP (190LPH) can supply enough fuel for an equivalent 8 x 38LB/hr injectors. Once you reach this size, you risk your fuel pressure dropping off.
*Most injectors are rated at 3 bar (43.5psi), some are rated at 4 bar (58psi). If you would need to upgrade to anything when more mods come, some 32# @43.5psi would allow you a good bit of room on a NA (naturally aspirated- NON BOOSTED) application