Holley Sniper Quadrajet!

Discussion in 'High Tech for Old Iron' started by Electra Bob, Jan 6, 2019.

  1. Electra Bob

    Electra Bob Well-Known Member

    Now this looks interesting.

    "Are you tired of rebuilding the 50+ year old Quadrajet on your classic Chevrolet, GMC, Buick, Oldsmobile, or Pontiac? Introducing Sniper EFI Quadrajet™. The first bolt on spread bore electronic fuel injected throttle body system that does not require any additional adapters, sealing plates, or intake manifold swaps! The Sniper EFI Quadrajet™ retains the same great features as the 4150 Sniper EFI version such as; four 100lb/hr Injectors, built in timing control, a 3.5”full color touchscreen and much more! The throttle body will support up to 500 horsepower naturally aspirated. In addition to all of these great tried and true features, the Sniper EFI Quadrajet™ will fit most stock air cleaners and offers multiple fuel inlet configurations that allow for a stock appearing installation!"

    https://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_efi_quadrajet/

    [​IMG]
     
    OHC JOE likes this.
  2. DasRottweiler

    DasRottweiler -BuickAddict-

    I wanna see someone put 2 of these on a dual carb manifold, should support 1000hp, no? Jim
     
  3. pbr400

    pbr400 68GS400

  4. 1973gs

    1973gs Well-Known Member

    Here's FAST dual quad on a 523. IMG_0009.JPG
     
  5. ravensbud

    ravensbud Silver Level contributor

    I’d try that in a minute if it was 800 cfm like their 4150 Super Sniper. But 715 cfm just isn’t enough. Maybe they’ll come out with a Super Sniper version? Really cool piece!
     
  6. Electra Bob

    Electra Bob Well-Known Member

    She lives! The Electra is running with the Sniper Quadrajet.
    Still have some odds and ends to finish up and need to take it out on the street to properly self-tune but after a long down time to replace the fuel system from end to end it fired up first turn of the key!
    Full write up to come.
    Cheers!
    Bob
    upload_2019-4-28_11-59-28.png
     
  7. Quick Buick

    Quick Buick Arlington Wa

    Yess. Looks Good...
     
  8. Taulbee2277

    Taulbee2277 Silver Level contributor

    Nice!!! I would really like to play with one of those. Please let us know how it compares to the Qjet.
     
  9. TrunkMonkey

    TrunkMonkey Well-Known Member

    All I wanna know is does it "sound" like a Q-Jet.

    I wanna hear it moan.
     
  10. Electra Bob

    Electra Bob Well-Known Member

    Given I've done everything bass ackwards and left an engine workover until last I won't be doing any WOT testing any time soon but I'll see what I can do to capture the sound. Hopefully it will drown out any knocks and clatters... :)

    Yet to take it out on the road but I consider starting up with the first turn of the key after sitting for a little over a month a positive sign.

    Bob
     
    300sbb_overkill likes this.
  11. techg8

    techg8 The BS GS

    I really wish it LOOKED like a quadrajet. Just being spread bore isn't enough for me.

    I like the technology, but if it's gonna be called a Qjet it should look the part too IMHO.

    Cool project, I'll be interested to see how it compares performance-wise.
     
    446370 and 69GS430/TKX like this.
  12. Electra Bob

    Electra Bob Well-Known Member

    Once the air filter is on there is nothing to see... except the filter, regulator, plumbing and electrical paraphernalia. No disguising that as anything else.

    Performance is a secondary objective for me. Easy starts, cleaner burning and possibly an improvement in fuel economy are what I'm after.

    Being able to drop it on a stock manifold is a big plus.

    Bob
     
    69GS430/TKX and techg8 like this.
  13. techg8

    techg8 The BS GS

    Ease of use and driveability is where it's at regardless of the fuel mixer used. And with the cost of gas lately ...mileage does count
     
  14. PaulGS

    PaulGS Well-Known Member

    Kens' Quadrajets run as well as fuel injection.

    The last 2 he rebuilt for me have be 100% flawless.
     
    69GS430/TKX and techg8 like this.
  15. Electra Bob

    Electra Bob Well-Known Member

    Took her out for a fuel run tonight. About a six mile trip.

    Now admittedly I'd never touched the carb since I got the car so previous state of tune is questionable. I did check the timing and that was on the nail.

    With the carb it was the usual prime choke, start (usually first/second time), fluff a bit and then a touch of the shakes and bogging until it got warmed up and then it was fine.

    Tonight was turn the key and start right up and settled into a nice idle. A bit fast but so I need to adjust that. Checked tire pressures and trans fluid while it warmed up then hit the road.

    Purely subjective but the old girl felt a lot more lively and responsive. Smooth all the way and nice idle at a red light. Took a slight detour on the way back and gave it about half a boot full at 30 mph and she picked up her skirts and got up to 60 in short order.

    Bob
     
  16. Quick Buick

    Quick Buick Arlington Wa

    Thats nice to hear...
     
  17. Rockable

    Rockable Well-Known Member

    Does anyone here know exactly what the timing control can do? Can it take the placemof both mechanical and vacuum advance? Does it learn the curve or do you program it in? If it learns, how does it know? Inquiring minds want to know. I'm really interested in this product for my base 455 engine that i will use in my 49 Buick.
     
    69GS430/TKX likes this.
  18. Electra Bob

    Electra Bob Well-Known Member

  19. Rockable

    Rockable Well-Known Member

    Thanks
     
  20. BennyK81

    BennyK81 Well-Known Member

    Just the sound of an electric fuel pump in a classic car is a no-go for me...
    Until you really daily drive it I see no sense in it. I'd miss the usual depressing of the gas pedal when cold to initiate the choke and all that stuff that makes a classic car a classic car...
     
    Max Damage and my1stBuick like this.

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