Bosch 30lb Injectors

I decided I needed to replace my injectors because although my LT1 is rather lightly modified (cam, headers, etc), datalogs showed that my factory 24# injectors were at over 92% duty cycle at WOT. After some research, I decided that 30# Bosch III injectors from Fuel Injector Connection would be a good fit and give me plenty of headroom without being too large.  

First, removing the old injectors.

Cleaning up the old injectors, they were full of gunk and many of the orings were stuck in the fuel rail.

Polishing the fuel rails with mag wheel polish.

Installing the new injectors.

Reinstalling the fuel rail.

Test run after install.

Afterwards, I did a round of re-tuning of the PCM using the injector data included by FIC. It was fairly lean, actually, and I had to make quite a few changes to the MAP tables (in Speed Density mode) and the MAF tables to get it right. The new injectors were definitely different, at small pulsewidths (idle) they were quite rich, and at longer pulsewidths they behaved more normally. In the end I got it dialed in within 1% fuel trims at both idle and driving.