Generation IV External Engine - ls3 stock injector
05-28-2012, 11:08 AM
If I'm completely na but worked heads and a pretty decent size cam my question is will my stock injectors be ok??? Or if I can should I upgrade to the zr1 ls9 injectors which are 52 lb??? Basically my question is what hp are the stock injectors good to and is there any potential gain in upgrading
05-29-2012, 06:44 PM
Stock LS3 injectors are pretty oversized for an LS3...they're actually LS7 injectors...you'll probably be ok with them.
06-02-2012, 07:08 AM
LS3/LS7 injectors are good well into the 400+ rwhp range. Dont use LS9s, they spray fuel at an angle because the have a different location on the supercharger. So they angle the spray to shoot it back at the valve. When you add these to a standard LS engine, your just going to shoot the fuel into the port wall instead of at the valve.
06-02-2012, 07:44 AM
Good to know sir!!
You can also get them resized to a higher flow rate and not have to spend 4-8 hundred on a new set. Just my .2 though
06-02-2012, 10:31 AM
06-02-2012, 12:27 PM
FAST has LS3/LS7 injectors in 50/65/85 lb/hr, Im sure most of the vendors here have them avaliable!
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