randys101

Hi all and thanks for everyone's expertise, in the LS world!!
I have an 01 Z28, with a new LS6, bored 0.20 over, 799 heads, stock intake (off my LS1), an LS9 cam, shorty headers and dual exhaust.
I'm getting a tune, next month, and I'm wondering if I should replace the stock fuel injectors (28lbs. I believe) with maybe 35lb injectors, before the tune??
Anyone with thoughts on this??
Thx as always, in advance!!!

G Atsma

Are you running short of fuel now? A larger injector will not increase power unless it's leaning out already. Bigger injectors do not increase horsepower on their own.

JakeFusion

iTrader: (7)

You may need more fuel injector, but not much. 28lbs will take you to 430-440rwhp or so.

The GTP 36lbs injectors that FAST sells for 299 or so are a good upgrade. Really good data characterization with them too.

randys101

Not that I am aware of, but I keep getting a low volt code (PO327) on the front knock sensor.
I have replaced both KS and the harness, but still get the code, especially if accelerating more than normal.
There is no pinging going on, that I can hear.
Since I had an upgraded motor, I got to thinking maybe the stock injectors were making it lean out a little.
I do get the code, even if driving it normally, eventually.
Just to wanted to get the general input on this.
Thx!!!

randys101

OK and thx for the info!!!

rpturbo

iTrader: (47)

IMO, there is no way I would leave stock injectors in it. The GTP injectors are all over and cheap as dirt. Get the flowed/cleaned and for less than $150, your good to go. JMHO

randys101

Thx for your thoughts on this!!!

LSX Power Tuning

iTrader: (4)

We dont run anything over 400rwhp on 28's, can you make more, yes but the duty cycle will be 95+% on the injectors duty cycle.

randys101

Very helpful and thx!!