Welcome to V8Buick.com.
Page 29 of 29 FirstFirst ... 192526272829
Results 701 to 707 of 707
  1. #701
    Join Date
    Sep 2007
    Location
    San Jose CA
    Posts
    798

    Default Re: Power Timing your Buick V8

    Quote Originally Posted by LARRY70GS View Post
    It should not be pinging if you have your timing set correctly. It obviously isn't running lean if your plugs are black. Not having good gauges on your car is not a good idea. If it is running hot, you could be getting some vapor lock. That would explain why it ran better when it was cool out. I think you have several issues going on at the same time. I'd look carefully at your float levels. Also check the power valves in the carburetor. Sounds as if you are running rich. Find out how hot it is running. Hope you at least have an oil pressure gauge.

    Installed a New Temp gauge and the car was running fine never went past 195 while driving around with total timing set to 36* to just test it out. After 25 mins of driving around it began feeling pig rich @ Idle, no gas smell but I could tell when attempting to accelerate it bogged/ backfired once through the carb. Felt as if it was flooded. The odd thing it cranks right up and fine after I park it. For sure now it's turning into a carb problem. Screws are backed out 1 turn on all 4 corners. My thought is that when attempting to tune it I might have exposed the transfer slots. I will pull the carb and take a closer look. It was a brand new Holley DP 850 but who knows something might be wrong. I don't think it has a blown power valve since didn't holley add something to prevent it? I will take a closer look. Might just be a carb problem. Thanks for the help, and everyone! As usual Buick guys are always the most helpful
    Jose J. Gonzalez

    1968 Buick Riviera--- sold : \
    1967 Riviera Sold
    1969 Buick skylark Custom sold
    350 4bbl
    T/A Intake
    With a 1-inch Spacer
    Dual Exhaust H-Pipe
    Flowmasters
    Trans Shift Kit


    Current:

    1972 Buick Skylark GS Tribute

    455 Bored .40 Over
    SPX Intake
    850 CFM Holley DP
    Ported Iron Heads
    Ported Iron Exhaust manifolds
    3.42 Gears
    th350 W/ shift Kit
    Dual exhaust/ Dynomax turbo mufflers

  2. #702
    Join Date
    Jul 2015
    Location
    Wisconsin
    Posts
    681

    Default Re: Power Timing your Buick V8

    How can it be running rich with black plugs yet be pinging too and be only a carb problem?


    Sent from my iPhone using Tapatalk

  3. #703
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,220

    Default Re: Power Timing your Buick V8

    Quote Originally Posted by matt68gs400 View Post
    How can it be running rich with black plugs yet be pinging too and be only a carb problem?


    Sent from my iPhone using Tapatalk
    If the plugs are black, it is either a carburetor problem, weak ignition, or plugs that are too cold. Oil consumption can also play a part in pinging/detonation. Deposits built up over years can pre ignite the fuel mixture as well as increase SCR. There may be a lot of factors at play.
    Larry
    1998 "Fully Optioned" SC3800 Riviera
    70 GS 455 Stage1, TSP 470, 602 HP@ 5900, 589 TQ @ 4900
    TA Hyd Roller Cam, 230*/238*, 112, .544"/.577" lift, 4-7 swap
    MSD Digital 6+, Ignitionman Distributor w/MSD trigger
    THM400 with Ultimate 258mm converter, Gear Vendors OD
    AED 1000 HO Carb, 800 CFM 7042240 Quadrajet
    8.5 10 bolt, 3.73's Race weight 4025lbs.
    Best E.T. 11.54 Best MPH, 116.06
    Larrymta@verizon.net, GSCA #291
    BPG # 1063
    N.E. GS/GN Club Assistant Director

  4. #704
    Join Date
    Sep 2007
    Location
    San Jose CA
    Posts
    798

    Default Re: Power Timing your Buick V8

    Quote Originally Posted by LARRY70GS View Post
    If the plugs are black, it is either a carburetor problem, weak ignition, or plugs that are too cold. Oil consumption can also play a part in pinging/detonation. Deposits built up over years can pre ignite the fuel mixture as well as increase SCR. There may be a lot of factors at play.
    The shop that originally dialed in the car also mentioned that the car liked a lot of timing . My thought is could it be I had retarded the timing enough that it wasn't burning the fuel as efficient causing it to appear rich?

    Sent from my SM-N920P using Tapatalk
    Jose J. Gonzalez

    1968 Buick Riviera--- sold : \
    1967 Riviera Sold
    1969 Buick skylark Custom sold
    350 4bbl
    T/A Intake
    With a 1-inch Spacer
    Dual Exhaust H-Pipe
    Flowmasters
    Trans Shift Kit


    Current:

    1972 Buick Skylark GS Tribute

    455 Bored .40 Over
    SPX Intake
    850 CFM Holley DP
    Ported Iron Heads
    Ported Iron Exhaust manifolds
    3.42 Gears
    th350 W/ shift Kit
    Dual exhaust/ Dynomax turbo mufflers

  5. #705
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,220

    Default Re: Power Timing your Buick V8

    Quote Originally Posted by 68Rivi_In_Cali View Post
    The shop that originally dialed in the car also mentioned that the car liked a lot of timing . My thought is could it be I had retarded the timing enough that it wasn't burning the fuel as efficient causing it to appear rich?

    Sent from my SM-N920P using Tapatalk
    No, you are missing something.
    Larry
    1998 "Fully Optioned" SC3800 Riviera
    70 GS 455 Stage1, TSP 470, 602 HP@ 5900, 589 TQ @ 4900
    TA Hyd Roller Cam, 230*/238*, 112, .544"/.577" lift, 4-7 swap
    MSD Digital 6+, Ignitionman Distributor w/MSD trigger
    THM400 with Ultimate 258mm converter, Gear Vendors OD
    AED 1000 HO Carb, 800 CFM 7042240 Quadrajet
    8.5 10 bolt, 3.73's Race weight 4025lbs.
    Best E.T. 11.54 Best MPH, 116.06
    Larrymta@verizon.net, GSCA #291
    BPG # 1063
    N.E. GS/GN Club Assistant Director

  6. #706
    Join Date
    Jul 2005
    Location
    Sweden (Volvo & Ikea)
    Posts
    686

    Default Re: Power Timing your Buick V8

    Just realized that I have jumped over setting initial and gone straight on the mechanical in the past.

    “People have 6-8 initial in most cases”
    Which means that they need 22-30* bushing to reach 30-36* mechanical.


    There are one company who makes 10* and 14* bushings for MSD and they claim that a higher initial timing would take away “stinky rich exhaust at idle” "most of you have already discovered to get a clean crisp idle out of your tune up and to make the carb adjustments respond to your tuning your performance engine wants more initial timing.". And gives example that their bushings makes 22* or 26* initial possible.
    (36* mechanical - 14* bushing = 22* initial)

    Smallest bushing included my distributor = 18*.
    (36* mechanical - 18* bushing = 18* initial)

    Question: Do we want as high initial and limited bushing as possible? Or is 6-8* initial most optimal?


    [Edit] I just studied the distributor curves and noticed that the distributor only can provide with ~28* mechanical advance.
    36* Total - 28* mechanical = 8* initial.
    28* mechanical – 8* initial = 20* bushing.
    But it’s still interesting if you should have as a goal to have a high initial.

  7. #707
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,220

    Default Re: Power Timing your Buick V8

    Again you are overthinking this. The only reason for running 20+ degrees of initial timing is if you have a big cam which requires it. All you need is 12-14* of initial timing. Run the 21* bushing.

    If I was you, I would look for a shop in Sweden that works on older cars. You need a second opinion from a competent mechanic. I have a feeling that you have some very basic problems with your engine that you are missing.
    Larry
    1998 "Fully Optioned" SC3800 Riviera
    70 GS 455 Stage1, TSP 470, 602 HP@ 5900, 589 TQ @ 4900
    TA Hyd Roller Cam, 230*/238*, 112, .544"/.577" lift, 4-7 swap
    MSD Digital 6+, Ignitionman Distributor w/MSD trigger
    THM400 with Ultimate 258mm converter, Gear Vendors OD
    AED 1000 HO Carb, 800 CFM 7042240 Quadrajet
    8.5 10 bolt, 3.73's Race weight 4025lbs.
    Best E.T. 11.54 Best MPH, 116.06
    Larrymta@verizon.net, GSCA #291
    BPG # 1063
    N.E. GS/GN Club Assistant Director

 

 
Page 29 of 29 FirstFirst ... 192526272829

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Back to top