I just received my new Racetronix 79lb High Z injectors. I was wondering if anyone has used these yet and how they worked. I will be running these with the stock PCM. Anyone know what injector offsets work for these big guys?

Bill

 

Check with racetronix to see what fuel pressure they rate them at - then just use a ratio of that with your pressure to get your number.

Also, going that big you can probably get away with just plugging in 79 and see how it does. Idles/cruises a little rich - lean it out, or the other way around.

 

Wow there's a 79# high independence injector? Link?

 

high, low, they are all the same to me.

 

I bought a set of his 62# high imp injectors from there. All I did was cut the pw by the % difference in size and they work perfect.

If I did my Camaro over again, I'd do the 79's for sure.

 

I wasn't looking for the injector constant (Lbs/hr), but the injector offset. These offsets are the delay it takes in opening the injectors after the power is applied, the table in Tunercat is listed by micro seconds. It varies by the voltage applied (but it really only matters in the 12-14 volt range) and the mass of the plunger. No one has played/adjusted these before? They are pretty essential to making injectors work properly. Remember years ago with the old MSD 50lb injectors, they were pretty slow to open compared to stock and guys had a hard time running them. Had they had their offsets right they would have worked like stock!

Bill

 

I didn't have to touch the offsets to make the high Z 62's work perfect. Not sure if the 79's are the same design though.

 

at least they idle pretty good @ 800rpm...

 

so any update on these? where they at?