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    Thread: 850 Speed Demon

    1. #1
      Join Date
      Mar 2005
      Posts
      52

      850 Speed Demon

      I bought what was supposed a 750 speed demon off ebay seller...I checked the butterfly sizes 1.75 and the 8 on the carb main body...so it was listed wrong and now i'm stuck with a 850...the carb was jetted down to 70 primary 74 secondary...stock jets are 85 primary, 93 secondary
      Is this going to be too large for engine specs, street use


      Engine spec and car 71 camaro

      SBC 400, th350 2800 stall, 411 gears, 26 tire
      Cam hydra roller
      rpm range 2200-5900, advertised duration 291 in 311 ex duration @.050
      in 235 ex 249, valve lift .521 in 507 ex, 107 lobe sep
      Scat Crank internal balance 3.750 stroke 6” Rod Forged Pistons +.040 Scat I-beam 6” Rod 4340 7/16” bolts
      je pistons 11 to 1
      Dart Pro 1 alum head 200cc intake 2.02 /1.60 valves 68 cc just blend bowls, machined chambers, matched intake
      1.5 crane alum roller rockers
      Victor Jr Intake gasket matched...alum
      Msd Bullet Distributor
      Msd 6al BoxElectric
      7psi holley fuel pump
      1 ¾ headers



    2. #2
      Join Date
      Feb 2006
      Posts
      82
      An 850 is going to be too large on a combination like this. Your stall speed may help you, but you're most likely not going to be happy with the way this carburetor runs. It will most likely be a little rich at idle, not as responsive as a smaller carburetor would be, and potentially go lean at WOT.
      Technical Support

      Barry Grant, Inc.

      www.barrygrant.com

    3. #3
      Join Date
      Nov 2006
      Location
      NH
      Posts
      269
      Country Flag: United States
      g71rs,
      You have a PM

    4. #4
      Join Date
      Aug 2004
      Location
      CT
      Posts
      821
      I have a BG 750 Street Claw for sale, I haven't listed it yet.
      If you're interested I'll hold on to it for you.

    5. #5
      Join Date
      Mar 2005
      Posts
      52
      Quote Originally Posted by sunkistcamaro
      I have a BG 750 Street Claw for sale, I haven't listed it yet.
      If you're interested I'll hold on to it for you.
      sent you pm

    6. #6
      Join Date
      Mar 2005
      Posts
      52
      Quote Originally Posted by Shaker455
      g71rs,
      You have a PM
      sent you pm

    7. #7
      Join Date
      Mar 2005
      Posts
      52
      listed on ebay if anyone is interested
      http://cgi.ebay.com/ebaymotors/ws/eB...m=180098152958

    8. #8
      Join Date
      Sep 2006
      Location
      Southern Indiana
      Posts
      4,699
      Country Flag: United States
      Relist it.
      Talk to shaker455.





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