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WAHOO! 1910 Edelbrock ***UPDATED***

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by KRAZIE87K5, Mar 5, 2002.

  1. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    I can't wait!!! It should arrive on Thursday. Any pointers on what to do with the funny QJet fuel inlet? I know that a few other people (Greg72) had problems getting that setup correctly. I AM SO FLIPPIN' EXCITED!! /forums/images/icons/smile.gif/forums/images/icons/smile.gif/forums/images/icons/smile.gif/forums/images/icons/smile.gif/forums/images/icons/smile.gif/forums/images/icons/smile.gif Finally, I can experience all the torque that 454 perched under the hood actually has! /forums/images/icons/cool.gif
     
  2. Burt4x4

    Burt4x4 3/4 ton status

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    Do you mean 1901????
     
  3. Triaged

    Triaged 1/2 ton status

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    I think he is talking about the new 850cfm Q-jet.

    For the fuel line I would get a AN adapter and run a AN hard line to the fuel pump with a K&N filter in the middle of it (the K&N filters come with AN ends). I think the AN adapter is the same as used for a holly Dominator???
     
  4. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    I bought my fittings from a local race shop....They were "Earl's" fittings. Something like $15 for them, but they ARE that cool Blue-anodized color! /forums/images/icons/cool.gif

    Beyond that.....just make sure you aren't pushing 20 PSI of fuel pressure, and you should be all set! My mechanic started me out with the new regulator set at 3 PSI, but my motor drinks faster than that at WOT...I'm currently at around 4.5 PSI and haven't had any full-throttle "stumbles" yet.

    That should get you in the ballpark.... I expect you will have a much more positive experience than I did....!!

    Oh, and by the way......my mileage is up from 7MPG to 12MPG!!!! That's not bad either!!!!
     
  5. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    Burt-

    Yeah, I mean the 1910... /forums/images/icons/wink.gif It's the 850cfm QJet with an electric choke. It's the model that is supposed to be used on 500+ HP motors! /forums/images/icons/cool.gif

    Greg-

    After hearing your story Greg (about the power increase and hopeful mileage improvements), I couldn't help myself! Did you ever see any obvious improvements in your mileage?

    I feel like a giddy little schoolgirl! I can't wait! /forums/images/icons/crazy.gif/forums/images/icons/laugh.gif
     
  6. Burt4x4

    Burt4x4 3/4 ton status

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    Ahhh, roger doger! Best of luck to ya!!
     
  7. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    Krazie,

    I don't know quite what you're asking about "obvious" improvements....? I keep track of every gallon of gas I put into the beast and last weekend was the first "complete" fillup since the carb swap (I don't drive much!) I knew I'd be doing highway miles only.....so I thought it would be a
    "best case" mileage experiment. That's when I got the 12MPG...

    From what I understand, 12 -14MPG isn't really that hard to do with a 454-ish Big Block.....it's kinda average. I guess with my defective fuel pump I was just running SO rich all the time, I was losing power AND getting crappy mileage too!!!!

    The only way to know for sure is to keep careful records of your fuel consumption now, and do it again after the swap.
     
  8. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    What gears do you have? 12 MPG with a big block and no overdrive? That's great!!
     
  9. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    3.73's.....and 35's that measure 33" ACTUAL diameter.

    I was pretty happy with that gain in mileage......it almost DOUBLED by fixing my existing problems, and the new Q-Jet should make a big difference in my "offroad" experience too! /forums/images/icons/cool.gif
     
  10. Steve_Chin

    Steve_Chin 1/2 ton status

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    Quadrajets are great carburetors. It may or may not need to be re-jetted for your exact combo.

    FWIW, the Earl's P/N for the carburetor to AN adapter is 991952. It's listed as a 1"-20 thread to AN-6 fitting. If you're using an aftermarket fuel pump, you can pull the fitting out of the pump and install the correct AN-6 adapter fitting and run AN braided hose from the pump to the carburetor. I've found this to be an unnecessary hassle on most engines and prefer to use 304 stainless 3/8" hard line that's bent and flared to look like the original. Fine Lines should make a hard line that will fit your 427 with the Quadrajet.
     
  11. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    Steve-

    Thanks for all the good info.

    All right... I got it installed... and took a test drive. Sad to say, that I am really disappointed with the lack of power vs. the Holley. HOWEVER, after playing in the snow a little bit, I can say this for the 1910... I CAN'T MAKE IT STALL! I can climb anything, and the carb just keeps right on running just as smooth as it was on the street!

    Granted I have not done ANY tuning on the carb yet, I slapped it on and drove off basically. /forums/images/icons/blush.gif I had glanced thru the manual and noticed that there are a lot of tuning tips there that may need to be done to make this thing work in tip-top shape. Any good suggestions from peeps who already have the 1910, as to what to do first to make this poor QJet happy? I need my top end power back!
     
  12. Triaged

    Triaged 1/2 ton status

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    Your top end power is going to come from the secondaries. You can contol when they start to open with the spring tension on the air door and how fast they open by the size of hole in the vacume diafram.
     
  13. Steve_Chin

    Steve_Chin 1/2 ton status

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    Re: WAHOO! I bought a 1910 Edelbrock QJet!!!

    It's pretty rare for a carburetor to be perfect for a given engine right out of the box. They pretty much all need to be tuned, even if they were set up by a carburetor specialist. I originally set my carburetor up with #75 mains, #46K pri. rods, #CK secondary rods, on a K hanger, and a blue power piston spring. It ran pretty well and was very smooth. Believe it or not, when I leaned out my primary main jets, the top end power of my Blazer's engine picked up big time. I really couldn't say that this is what you need to do because I don't know all of the details about your engine and I don't know how Weber tailored the internal restrictions in this Quadrajet model.

    Anyhow, the best thing I can recommend is to find out exactly what jets, rods, and power piston spring are in the carburetor. A good starting point on most engines is to set up the primary jets and rods with #74 jets and #44k rods, then adjust up/down from there. Use the lightest power piston spring that won't make the engine surge under light acceleration and will also not make the engine stumble when you lay into the throttle gently. Set the APT to the lowest point that will allow the engine to cruise on the freeway without surging or pinging. Set the spring on the secondary air valve as loose as it will go but won't make the engine stumble when you mash the throttle (start with about 1/2 turn tighter than no slack and adjust up/down from there).
     

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