80%

 

just with what you have in mods i'd say injectors would be a good thing. i was running 85% or so before i upgraded to green tops and now it's like 57-58%. with a shorter pulse i'm getting a more precise and repeatable AFR at high RPM WOT

 

If you are seeing more than 80% Injector Duty cycle it is time to upgrade.

 

Thanks guys - I thought so to. Seems to lean out a bit on the top end. Though I baseing that on narrow bands (not terribly accurate - I know) & HPTuners logs.

Svede - forgot to ask - where did you get the greentops from? Since I am going to headers (finally) - looks like I will need them.

Steve

 

I see green tops on eBay. Also in the for sale section here and on LS1tech. If you want new ones, Summit Racing has 'em.

 

Thanks Batboy!

 

If it helps any here's a link to fuel injector sizing;

http://www.rceng.com/technical.aspx?UserID=301503&SessionID=1LS8Uv88aVtWjVsvluOQ

Scroll down to the bottom and there's a "fill in the blanks" worksheet if you don't want to do the math.

 

I am at 90% @ 7000 RPM

I need injectors......