hows a cc306 or cc503 w/ stock injectors?

[lt1noob]

just wondering if anyones running this, are these on a cam only car ok with stock injectors? if not what would you recommend be run, 30# or so?

[95formula383lt1]

im running cc306 with ported heads and intake stock injectors, so far 800 miles no issues, and no tune yet ether.

[MEAN LT1]

You'll be fine with the stock injectors but it would be a good idea to swap over to some 30's or so.

[ksmyss]

it all depends on what your injector duty cycle looks like. i ended up having to bump my fuel pressure up because mine was sitting in the 96% range with just bolt ons.

[meissen]

I put 30#'ers on mine with the idea that it'd help the injectors last longer. It's not good to have them in a high duty cycle so if you put the 30#'ers in there the duty cycle will be lower. Just make sure you have the PCM calibrated for the 30# injectors before turning the car on with them. I did and now 80 miles later my engine's in the machine shop having all the bearings replaced and the cylinder walls bored out.

[lt1noob]

i had injectors replaced with stockers last year they probs have...less than 1k on them. so im hoping theyd be alright.

[jakesz28]

I ran mine that way and had a nice afr. I wasn't worried with the duty cycle that much, mainly because I was told that datamaster's cycle percentage isn't correct.( there numbers seem to be a little high) That was with the 306 shifting at 6500-6800.

[Spartan7]

i had injectors replaced with stockers last year they probs have...less than 1k on them. so im hoping theyd be alright.

Regardless of how new they are, you are risking your injectors by running them at over 85% duty cycle, among other things. A good way to find the smallest injector you need is multiply your flywheel HP by 0.07. That provides you with a safe buffer, considering many numbers come into play when determining injector size.