High or Low Impedence Injectors with FAST?

[KTamez]

I will be needing42# Injectors which I believe can be found in either high or low impedence. IS one preferred over the other, since the FAST management can utilize either one?

TIA.

Kurtis Tamez
97 Z/28

 

[JeffB]

i'd go with the low impedance ones... the extra current that they pull allows them to open quicker and stronger than the high impedance ones... if you're going with low impedance you might want to consider getting some larger ones to have some growing room... i was driving around on a stock 350 LT1 w/75 lb/hr injectors on my speedpro without any trouble... and they're good to almost 1000hp so i'll never need to think about injector sizing again...

 

[bobbyp]

How do you change the impedence drivers on the fast system?
I dont remember reading any info in the manual about this?
Is it a software or hardware change?
Thanks
New user

 

[Lance]

Originally posted by bobbyp
How do you change the impedence drivers on the fast system?
I dont remember reading any info in the manual about this?
Is it a software or hardware change?

It's neither. The drivers automatically adjust for the injector impedance. If the injectors are high impedance, the driver will never reach the current level to trigger the fold back to the holding current and will just saturate.

 

[KTamez]

Thanx

Thanx Jeff for the input!

Kurtis