Bruce Nunnally Posted July 17, 2012 Report Share Posted July 17, 2012 My 2008 Cadillac STS-V is lightly modded — Spectre Cold Air intake, and Corsa axle back exhaust; STS-V fuel injectors may be next as a supporting mod. Each mod so far has proven out on the dyno to improve the performance of the STS-V. The STS-V was factory rated at 469 hp at the crank, and mine is just over 500 hp at the crank now. STS-V Fuel Injectors An issue to keep up with as you tune is how the fuel injectors are doing. Mine are running at a duty cycle of 85-86% as we saw on my HP Tuner gauge charts done during the Virtual Dyno baseline runs. Read More: http://caddyinfo.com...fuel-injectors/ Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
Texas Jim Posted July 19, 2012 Report Share Posted July 19, 2012 OK... I'll give my opinion... I would go with the bigger injectors... you are at the ragged edge limits of the ones you have now. While true that you can overdrive the pump with higher voltage thereby making more pressure and thus more flow from the ones you now have... What is the extra voltage going to do the the longevity of the pump?? How hard and how expensive is it to replace a fuel pump on your "V"?? I would instead look to replacing the injectors with bigger ones. That will decrease the duty cycle of the injectors, maintain stock voltage on the fuel pump, and leave more space for future mods. Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted July 19, 2012 Author Report Share Posted July 19, 2012 My thinking also; the Boost a pump is a tried and true solution but I am more comfortable with larger injectors first. Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
Texas Jim Posted July 19, 2012 Report Share Posted July 19, 2012 My thinking also; the Boost a pump is a tried and true solution but I am more comfortable with larger injectors first. Agreed... Link to comment Share on other sites More sharing options...
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