Welcome to V8Buick.com.
Page 29 of 29 FirstFirst ... 192526272829
Results 701 to 715 of 715
  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
    27,439

    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
    27,439

    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
    27,439

    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

  8. #708
    Join Date
    Apr 2012
    Location
    NewHampsha USA
    Posts
    1,097

    Default Re: Power Timing your Buick V8

    I have a remanufactured HEI distributor. Installed MSD rotor , coil, cap and module with rev limiter. I purchased a Crane advance curve kit and a Crane adjustable vacuum advance cannister with a vacuum timing limiter/stop. I installed adj. cannister and limiter per instructions. Will redo limiter using your pics and method. My initial seems to be happy set at 12*. (Mild cam/build) I bought an MSD advance kit from Summit for HEI distributors, because it stated in the description it contained total advance bushings. It did not, bushings in kit are to use when replacing the centrifugal weights. It seems every kit I look at which contains the brass bushing to limit total advance states in the description it is for points style distributors. A link to the proper advance kit with the correct bushing to limit advance in HEI distributors would be great. I am assuming you need to remove the rollpin and gear to install this bushing. Looking forward to finishing up this distributor and getting on with power timing . Thanks Jim/Rott


    Tapatalk User
    1970 Buick Skylark-455/400/3:42 ongoing frame off/close to a frame back on....
    1978 Pontiac Firebird Formula 400-ongoing project car
    2008 Ford Escape Limited
    2004 Ford Explorer
    2005 Ford E-150 Work Van

  9. #709
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,439

    Default Re: Power Timing your Buick V8

    No, there is no advance stop bushing in the HEI Distributor. The mechanical advance amount is dictated by the shape of the center piece and weights. There are some posts here where members have come up with inventive ways to limit the mechanical advance. I know this thread is long, but you will have to read through all the pages to find the posts that apply to the HEI.
    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

  10. #710
    Join Date
    Apr 2012
    Location
    NewHampsha USA
    Posts
    1,097

    Default Re: Power Timing your Buick V8

    5 minute response time.... pretty dam good Larry.
    Thanks for the answering that question ,appreciated. The MSD advance kit which claimed to have limit bushings may do just that. Albeit these bushings go on the pegs for the centrifigul weights which are included in kit which also contains a new center piece. Perhaps this is what limits total advance, changing out center piece, weights and weight bushings? On another note, when I pulled the distributor from my engine after break in , I noticed I had dodged a bullet , catching the rollpin trying to exit stage left.

    I did neglect to mention this was a lowmile remanufacture , but still a used unit. I am going to replace pin with new. Can /should I use a lil dab of red loctite for insurance? Jim

    Tapatalk User
    1970 Buick Skylark-455/400/3:42 ongoing frame off/close to a frame back on....
    1978 Pontiac Firebird Formula 400-ongoing project car
    2008 Ford Escape Limited
    2004 Ford Explorer
    2005 Ford E-150 Work Van

  11. #711
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,439

    Default Re: Power Timing your Buick V8

    I'm not aware of any MSD advance kit with bushings for the HEI. Can you link me to what you are seeing? Advance stop bushings are used in the MSD distributors, and that is all they fit.

    The roll pin shouldn't need anything, but if it makes you feel better, use the lock-tite. A new pin installed correctly should do it unless the hole in the shaft is worn too big. Check that.
    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

  12. #712
    Join Date
    Apr 2012
    Location
    NewHampsha USA
    Posts
    1,097

    Default Re: Power Timing your Buick V8

    The bushings in this kit are for mounting the new weights onto the new center piece. I can't seem to link while using Tapatalk and Summit app. Summit part number for MSD advance kit is MSD-8428 . In description it states included are advance limit bushings. I believe that mech advance may be limited by using thier replacement centrifugal weights and center piece . Check out the pdf. file download. (Instructions ) and thanks, Jim





    Tapatalk User
    1970 Buick Skylark-455/400/3:42 ongoing frame off/close to a frame back on....
    1978 Pontiac Firebird Formula 400-ongoing project car
    2008 Ford Escape Limited
    2004 Ford Explorer
    2005 Ford E-150 Work Van

  13. #713
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,439

    Default Re: Power Timing your Buick V8

    https://www.summitracing.com/parts/m...FceLswodl3sLdA

    The plastic bushings you see are for the weight pivot pins. They have nothing to do with limiting the mechanical advance. Those bushings are common to just about ANY weight kit for the HEI.

    One review says 24* of mechanical advance with those weights, not bad.
    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

  14. #714
    Join Date
    Apr 2012
    Location
    NewHampsha USA
    Posts
    1,097

    Default Re: Power Timing your Buick V8

    Quote Originally Posted by LARRY70GS View Post
    https://www.summitracing.com/parts/m...FceLswodl3sLdA

    The plastic bushings you see are for the weight pivot pins. They have nothing to do with limiting the mechanical advance. Those bushings are common to just about ANY weight kit for the HEI.

    One review says 24* of mechanical advance with those weights, not bad.
    12* initial + 24* = 36* right in the ballpark
    Then I'll limit the vacuum advance to 8 to 10* and that should do it. Jim



    Tapatalk User
    1970 Buick Skylark-455/400/3:42 ongoing frame off/close to a frame back on....
    1978 Pontiac Firebird Formula 400-ongoing project car
    2008 Ford Escape Limited
    2004 Ford Explorer
    2005 Ford E-150 Work Van

  15. #715
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,439

    Default Re: Power Timing your Buick V8

    Quote Originally Posted by DasRottweiler View Post
    12* initial + 24* = 36* right in the ballpark
    Then I'll limit the vacuum advance to 8 to 10* and that should do it. Jim



    Tapatalk User
    Should be, but every combination is different.
    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