| Re: Next Mods... Suggestions |
Subject: Re: Next Mods... Suggestions by DrDyno on 2014/5/12 0:32:07 So... I installed a match set of Bosch III injectors from FIC, along with an Aeromotive adjustable Fuel Pressure Regulator (set to 44 psi, per FIC's recommendation). It was a relatively easy job and took an hour and a half from start to finish. This was my first foray into fuel injection of any sort (having been a professional wrench back in the Carbeurated 70's). I'm amazed the damn system works, given the electronics and minute timing required! The first thing I noticed after re-connecting the battery and starting it up was the idle... it had definitely smoothed out. After giving the ECM some time to figure things out, I went for a drive to try the acceleration. Honestly, it felt no different to me. My next (and final) engine mod was to have four new O2 sensors installed. I had Vern Carmack of Vern's Chevy Service in Clearwater, FL, handle that for me. It's a good thing I did because the old O2 sensors were a bear to remove and no way could I have done it on my back. Again, I gave the ECM some time to figure things out and then took it through the gears. This time, with the combination of the new injectors and the new O2 sensors, there was a noticeable difference in power. It wasn't as much as the 1.6 roller rockers and LT4 springs provided but, overall, a very satisfying conclusion to my low-bucks LT1 shenanigans! It's possible the new O2 sensors, alone, allowed the ECM to retune the proper mixture and the new injectors were superfluous. However, the engine definitely runs smoother from idle to red line and that, I believe, came from the Bosch III's. Anyway, regarding all of the various mods (listed below) my LT1 runs considerably stronger than it did when I first took possession, some five months ago. I had asked Vern to take it out and run it through the gears for his opinion and his response was it ran extremely strong for a C4. I believe his exact phrasing was "damn strong!" (he didn't designate LT1 or LT4). I'm happy with the results and would do each mod again. 1.6 Scorpion roller rocker arms LT4 valve springs, retainers and keys Higgyburner's open-air air filter cover (eBay) Throttle Body Air Foil ($25-bucks, what the heck?) Bosch III 24# injectors Aeromotive adjustable FPR Four new O2 sensors New gas filter I also flushed the cooling system and now run a 25% Dex Cool / 75% softened water mixture with No-Rosion Hyper Kuhl corrosion inhibitor and new 180° degree thermostat. My engine now runs 7-10 degrees cooler and rarely sees 205° even in stop 'n go Florida traffic... Definitely recommended! Thanks to all of you whose input proved so valuable! |
