how much power with the stock 5.3 injectors support?

 

I have read in the area of ~320 rwhp. I think I am just a little over 300 on motor and I am seeing 108% duty cycle on mine at 6100rpm. I reach 100% around 5800 though.

 

Dam I put a corvette ls1 in my truck its rated at 350 from the factory. I'v done some exaust and some other little things to it so I bet I'm close to maxing them out what do you think?

 

Notice I stated HP at the wheels. I would still look into it though.

 

Anything over 80% and its time for new injecotrs.

 

what are my options when looking for new injectors? I've hear something about people useing the 8.1 injectors. are they a direct replacment for my stock ones?

 

If you can get the 8.1 injectors for a good price they are o.k. I think they flow 31#. I got the 43lb injectors from Arizona Speed for $416. They should provide enough flow for 550hp as stated on their site.

 

Those are the injectors I would go with if I were you! Good price, Great injector! And a direct drop in!

 

I recently moved to those 42# 8.1 marine injectors. They are the same ones that Magnacharger includes with the Radix, and also ASM and Racetronix sell. The install is a snap and tuning wasn't difficult at all.

I ended up with a 5.12 injector flow rate value in LS1 Edit. Stock rate was 3.18.

 

what is the part # of the 8.1 injector?