Prissy cold air intake parts list

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  • PlasticBoob
    All Makes Combined
    • Jun 30, 2003
    • 4007

    Prissy cold air intake parts list


    Excuse the engine bay wiring mess, this is not how I plan to keep it.

    Okay, it's really late so I have to kind of rush through this. Hopefully I'll cover everything. I went with a 4" system because I figured some day a hi-performance MPFI 401 might need it, but in retrospect I think 3" would have been fine. I will list both 3" and 4" part numbers. Pricey? Yes! Worth it? Definitely, to me anyway!

    And to answer some questions from this thread, my Jeep did not have the coolant and washer reservoirs when I bought it. Seeing as the battery is on the other side, this is the only way I could get a true cold air intake without going with a snorkel or cutting into the fender.

    The Plenum
    3": It seems we have a problem here. I can't seem to find the most important piece anywhere. Maybe they stopped producing it when they discontinued the black crinkle coated 4" plenum?
    4": Spectre 9843 (out of production? try: Spectre 9849 )
    This goes on the carb. Most descriptions say it only fits 4bbl carbs or TBI units.

    Memory Flex Ducting
    3": Spectre 8741
    4": Spectre 9751

    Air filter and housing
    3": Spectre 9833
    4": Spectre 9831

    Cold air mounting flange
    3": Spectre 8148
    4": Spectre 9148

    You will need to drill the radiator support with a hole saw or find some other way to open it up.




    Miscellaneous stuff

    Straight tubes
    I'm not sure if I used a 4" or 6" long tube, I *think* the 4" will work but you may want to measure yourself before ordering.

    3" diameter, 4" long: Spectre 9409
    3" diameter, 6" long: Spectre 9419

    4" diameter, 4" long: Spectre 9709
    4" diameter, 6" long: Spectre 9719

    Couplers
    Two required.
    3": Spectre 8771
    4": Spectre 9771

    I found the extremely large clamps and mounting plates for the air filter box at Home Depot. Note that if you have EFI, you will either need to drill the aluminum tube or the plenum for the IAT sensor. Datalogs show a HUGE decrease in intake air temps, from something like 150-180* down to around ambient, and the performance increase when the engine is warm (and especially on hot days) is like night and day. Idling on a hot day brings the temps up to around 130, compared with 180 or so without a cold air intake. As soon as the Jeep starts rolling, they decrease back down to ambient.
    Last edited by PlasticBoob; 01-29-2019, 11:19 PM.
    Rob
    1974 Cherokee S, fuel injected 401, Trans-am Red, Aussie locker 'out back'
    Click for video
  • Mavawreck
    360 AMC
    • Jan 02, 2003
    • 3428

    #2
    I really like the end product, I'm wondering if a '80s cadillac TBI hat could be substituted to save some scratch.
    1988 Jeep Grand Wagoneer
    http://www.ifsja.org/forums/vb/showthread.php?t=153928

    1996 T100 SR5

    Comment

    • Rockwell_B1
      232 I6
      • Jun 28, 2011
      • 195

      #3
      Well this is getting added to my to-do list, if I have a 4bl that is.
      ~Alex

      Past Jeeps:
      1974 J10 LWB 4x4 304 V8
      1991 MJ Eliminator 4x4 4.0L HO
      '86 MJ X LWB 4x4 2.8L & '88 MJ Eliminator 4.0L

      Comment

      • rmorit01
        350 Buick
        • Nov 13, 2004
        • 1001

        #4
        I found I could assemble your system for just a tad under $150.00 at streetside auto - It looks like this would really work well for my TBI system -

        Thanks for the details -

        Here is a link to the shopping cart I created - http://www.streetsideauto.com/shoppi...562&quantity=1

        Last edited by rmorit01; 09-07-2011, 08:31 PM.
        79 Cherokee S

        Comment

        • The Colonel
          360 AMC
          • Feb 21, 2010
          • 2842

          #5
          Looks good Rob.

          Really neat seeing the before and after difference it made using the IAT sensor.

          Comment

          • JohnnyJ
            258 I6
            • Jan 21, 2001
            • 420

            #6
            You can get a really cheap TBI plenum (with tube and junky air cleaner) for the 88 Chevy on fle-bay. The plenum is pretty reasonable. Oh did I mention cheap?
            Past Project: Stock Class TREC Racer Build Thread
            Current project: bringing back my 75 Wagoneer

            Comment

            • rreed
              350 Buick
              • Aug 21, 2006
              • 1472

              #7
              Yeah, I was thinking that's totally awesome (dude) until I saw the $99 price on just the plenum. I've been wanting to do this for a long time but would have to find a much cheaper source for parts.

              Awesome write-up though!!
              47 Willys
              75 CJ-5
              81 Scrambler
              76/79/80/81/85 J20 (all the same truck)
              86 Grand Wagoneer - FOR SALE!!!
              96 ZJ

              Member, FSJ Prissy Restoration Association

              You can't drink all day if you don't start in the morning.

              Comment

              • Wagn Man
                258 I6
                • Jun 23, 2009
                • 434

                #8
                Excellant, I will be in need of such info. I'd hate to cover up my Edelbrock MPFI with the clunky stock unit.
                78 Chero NT..... nickname "Crash"
                84 GW 401, Rhino Grille
                03 Chevy Silverado 2500HD My DD/Tow Rig

                Comment

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