I have a 5.3 in my truck. I am currently spraying a 125 shot. Should I up the shot with stock injectors and stock fuel pump?
Give me any suggestions.....

 

You spraying a wet or dry shot? I'd upgrade the pump regardless for a safety net. If you're going dry... perhaps a set of 8.1L injectors would be a good upgrade also to keep the IDCs down.

I think stock 4.8/5.3 injectors will run to about 300rwhp or so... it's almost 3am, I'm a lil slow now.

 

Thanks for the info.
What about the Z06 injectors? What are they rated at ?
Are the 8.1 injectors bigger ?
And I am running a wet system by nitrous works.
Im pretty sure Im running a little more than 300 rwhp. I havent had it dynoed but im pretty sure its more than that.

 

Well with Z06/F-bod (standard injectors) you have to shim your fuel rail and add new plugs to get them to work. I believe the stock truck ones are ~24lbs/hr and the 8.1s are ~31lbs/hr. It's not a whole lot of work to get them in there. Ask XLR8NSS, I think he did a write up on the swap.

Wet shots use fuel from the rail to add with the nitrous. Dry shots use the injectors for more fuel (via the MAF or Vac from the fuel regulator).

So since you're going with a wet shot, I'd just upgrade the fuel pump. That's all you really need

 

Thanks for the info. So just upgrading the fuel pump and I can up the shot ?
Dont think I can up the shot right now ?

 

Depends on what kind of power you are seeing. I would not sugest running too much off the stock pump personally cause all it takes is one sputter to kill the motor.

What kind of HP are you at right now?

 

Not sure what kind of power I'm pushing right now. Im guessing 325 to the tire.
Thinking about going to dimwittee (sp?) on saturday and I was thinking about upping the shot to 150. Just trying to get some idea on if I can or not.

 

If you do a dry shot, would 8.1 injectors and stock pump be ok? Or would it be wise to upgrade the pump for added safety?

 

I bet the stock pump would out flow the 8.1 injectors by a lil bit. An inline is a good idea for safety. You could get a Walbro for like $100 that's a 255lph and that will support well over 400rwhp...