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Has GM come up with better injectors that will fit our cars?

This is a discussion on Has GM come up with better injectors that will fit our cars? within the Internal Engine forums, part of the LSx Technical Help Section category; On another forum, I was reading about a project where a guy made 17 whp and 35 (!) lbs. ft ...

  1. #1
    Senior Member Naaman's Avatar
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    Cayanne
    98 Z28 Vert M6

    Has GM come up with better injectors that will fit our cars?

    On another forum, I was reading about a project where a guy made 17 whp and 35 (!) lbs. ft of torque just by switching to newer (2012) injectors that were designed for a different vehicle.

    The car was a 3.0L NSX. He switched to the 2012 RDX injectors, tuned the car, and made impressive gains all over the rev range. The factors contributing to the gains were a better injection "spray" pattern and an increase in cc's.

    The project took a lot of research, obviously. Just wondering: with the similarities between the LS platforms, does anyone think that switching to newer injectors (say, from a 5th gen, or a C6, for example) could yield a performance benefit? Improved MPG? Cooler operating temps?

    Here is a link to the thread I was reading. It is noteworthy that there were a ton of naysayers until the results were posted. I linked to the page with the dyno charts.

    Sale pending, my first project (should be a good one) - Page 3 - NSX Prime

    What does everyone think?

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    Moderator Firebirdjones's Avatar
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    I personally believe there is merit to finding gains with spray patterns.

    A friend of mine experimented with this on his GN, it's been 15-20 years ago though. I do remember he found gains but don't recall to what extent.

    I'm sure the same could be said for the LS platform. Just have to dive in and experiment.

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    Senior Member Naaman's Avatar
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    Cayanne
    98 Z28 Vert M6

    It's something I would love to try, but I'm not "at that level" yet. I understand the theory and stuff, but the nitty-gritty of it is still somewhat over my head. As for right now... I'm not much more than a "parts changer," and a relatively novice one, at that.

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    expensive tires az gt eater's Avatar
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    I remember my dad explaining his new in 2005? ish Dodge Ram. It had the diesel, and he said it made more power and sounded more like a V10 than a diesel. This was because the injectors sprayed the fuel in a uniform column as the piston went down, instead of just spraying a gob of diesel in the cylinder.

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    Senior Member Naaman's Avatar
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    Cayanne
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    Exactly. As the piston moves down, pressure in the cylinder decreases. Since the Cummins relies on pressure to ignigte the fuel, rather than spark, it can continue to burnthe air/fuel mixture as the piston moves down, applying pressure longer, accelerating the piston, rather than just slaming down on it with sudden force.

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