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Big-Block Nitrous System - The Coolest Squeezin' Rat

Testing The New EFI NOSzels From NOS

  • Big Block Chevy Nitrous System
    We used a 1/4-inch drive ratchet and socket to tighten the brass compression fittings. There are 16 of these fittings, so the ratchet made the job go much quicker. It's hard to strip fittings with the small 1/4-inch drive as well.
    Big Block Chevy Nitrous System
    We used a 1/4-inch drive ratchet and socket to tighten the brass compression fittings. The
  • Big Block Chevy Nitrous System
    Since the ferrule has to compress to make the seal, this connection must be made tight the first time, but not too tight or you'll strip the fitting. It wasn't hard to get a feel for the proper tightness after the first fitting was snugged up.
    Big Block Chevy Nitrous System
    Since the ferrule has to compress to make the seal, this connection must be made tight the
  • Big Block Chevy Nitrous System
    Always use two wrenches to tighten the fittings. We also prefer to use Craftsman "stubby" wrenches to avoid stripping the soft aluminum fittings. Be sure to properly orient each fitting so you can thread all of the connections into it without interference.
    Big Block Chevy Nitrous System
    Always use two wrenches to tighten the fittings. We also prefer to use Craftsman "stubby"
  • Big Block Chevy Nitrous System
    The NOS "funnel" jet is unlike traditional nitrous jets. The high-pressure plastic tube slips firmly inside of it and uses a compression ferrule and nut to seal. Double check your tube lengths and routing before assembling the fitting because you've only got one chance to get it right.
    Big Block Chevy Nitrous System
    The NOS "funnel" jet is unlike traditional nitrous jets. The high-pressure plastic tube sl
  • Big Block Chevy Nitrous System
    We left the other wrench out of this photo so you could see the fittings better. The short Craftsman stubby wrenches really came in handy when installing this kit. We had no trouble stripping any fittings and had no leaks either.
    Big Block Chevy Nitrous System
    We left the other wrench out of this photo so you could see the fittings better. The short
  • Big Block Chevy Nitrous System
    To clear the valve covers we faced each of the NOSzels 180 degrees apart. The nice thing about the NOSzels is that, when installed, they can still swivel so it's easy to get to the fittings for jet changes.
    Big Block Chevy Nitrous System
    To clear the valve covers we faced each of the NOSzels 180 degrees apart. The nice thing a
  • Big Block Chevy Nitrous System
    We mounted the nitrous solenoids in front and ran the dual -6 AN lines under the intake manifold for a clean look. The lines connect with a "Y" fitting, included in the kit, under the manifold so only one -6 AN line goes to the bottle.
    Big Block Chevy Nitrous System
    We mounted the nitrous solenoids in front and ran the dual -6 AN lines under the intake ma
  • Big Block Chevy Nitrous System
    With our installation complete we bolted the Coolest Squeezin' Rat onto Vrbancic Brother's DTS dyno to see if the NOSzels are worth the effort. The short answer is a big YES!
    Big Block Chevy Nitrous System
    With our installation complete we bolted the Coolest Squeezin' Rat onto Vrbancic Brother's
  • Big Block Chevy Nitrous System
    Last time we dyno'd this Rat, it pulled almost 2.5 inches of vacuum at WOT, which meant the throttle body was too small, so we installed this trick Accufab throttle body this time. Note also the 1-inch carb spacer we added to raise the throttle body up so its linkage would clear the raised fuel rails.
    Big Block Chevy Nitrous System
    Last time we dyno'd this Rat, it pulled almost 2.5 inches of vacuum at WOT, which meant th
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