Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 

Thread: big block chevy
          
   
   

Reply To Thread
Results 1 to 15 of 15
  1. #1
    yenko ss is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    punta gorda
    Car Year, Make, Model: 68 camaro ss 396
    Posts
    15

    Smile big block chevy

     



    i have 71 402 cbb.. lower end had rings put in.new cam 286,296 advertised duration 540-540 lift hyd flat tappets rotela t oil,,heads gone through,new valves,springs,guides etc etc.summit hei distributor 2 years old driven to car shows 4 per month,,rpm air gap intake,holley 670cfm carb..timming 12 initial,,38 total in by 3000..floats checked,new coil.modul 15"vacume at 800 rpm.vavles re adjusted..car runs good at 900 rpm after it heats up it starts running rough and backfiring through exhaust..get out and have to move distributor retarted like 10 inches then it starts i have to advance it to get it to run.then it runs decent for a while ..also double roller timming chain 1/4 in play any help,,, thank you much

  2. #2
    BigTruckDriver is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Dec 2004
    Location
    TX
    Car Year, Make, Model: hotrod
    Posts
    1,830

    maybe carb???
    Friends dont let friends drive fords!

  3. #3
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Jul 2003
    Location
    Madison
    Car Year, Make, Model: '67 Ranchero, '57 Chevy, '82 Camaro,
    Posts
    21,103

    How old is the fuel???? Sometimes I forget on my occasional drivers and have some gas that is a couple years old and it gunks up the whole fuel system......
    Yesterday is history, tomorrow is a mystery, Live for Today!
    Carroll Shelby

    Learning must be difficult for those who already know it all!!!!

  4. #4
    yenko ss is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    punta gorda
    Car Year, Make, Model: 68 camaro ss 396
    Posts
    15

    thanks

     



    fuel is new, filters are new,carb was new but buddy took it off another car after 10 starts,, i did notice he didn't drain fuel out of the bowls,gumed up??? im going to try and swap carbs for a test ???thanks for your help guys!!! best way to clean that gum out of carb

  5. #5
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
    Join Date
    Jul 2003
    Location
    Madison
    Car Year, Make, Model: '67 Ranchero, '57 Chevy, '82 Camaro,
    Posts
    21,103

    Just pop the carb apart and clean it up good with some carb cleaner and compressed air... Pay particular attention to the idle passages and accelerator pump passages.... The fuel we're stuck with these days turns everything to varnish after a short time!!!!
    Yesterday is history, tomorrow is a mystery, Live for Today!
    Carroll Shelby

    Learning must be difficult for those who already know it all!!!!

  6. #6
    yenko ss is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    punta gorda
    Car Year, Make, Model: 68 camaro ss 396
    Posts
    15

    thanks ill do that this week ill let you know what happens

  7. #7
    yenko ss is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    punta gorda
    Car Year, Make, Model: 68 camaro ss 396
    Posts
    15

    finding time

     



    i switched the carbs ran nice, in the end same result.. i did see a plug wire that looked like it grounded itself through the heat sheild around the # 8 spark plug boot to the header??? ill update asap .. any other ideas? thank you much

  8. #8
    68RATVT's Avatar
    68RATVT is offline CHR Member Visit my Photo Gallery
    Join Date
    Apr 2007
    Location
    Clovis
    Car Year, Make, Model: 39 Plymouth 2 dr sedan 360/727
    Posts
    97

    Hey man, what's your power source for the dist, do you have a msd box also.
    39 Plymouth 2-door sedan, 46 Dodge pu, 67 Mustang stock, 01 Road King

  9. #9
    yenko ss is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    punta gorda
    Car Year, Make, Model: 68 camaro ss 396
    Posts
    15

    Cool

     



    no msd ...painless wire harness ,12 volts to hei..thanks for asking..think i found it..90% electric 10% fuel...put nice new taylor spiro pro plug wires thought i had it, went to fuel up for car show sunday,felt surge,stall,that was it.. check for fuel, tons of that (750 holley dp) no spark,the rotor which i had checked no less than 3 times in last 13 days had a burn hole through the center, the tip fell right off at the bend no way of seeing it,, thanks for all the help, this is the best site for car nuts,,,stainless nuts that is ,,,

  10. #10
    yenko ss is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    punta gorda
    Car Year, Make, Model: 68 camaro ss 396
    Posts
    15

    at witts end

     



    hey guys im back again,went to car show today it sucks showing up looking like a miilion bucks, alright 990,000. and running like crap.. did the same thing backfiring through the exhaust,missing,stumbling,didnt want to run right,,,any ideas, please help this week ill check to make sure i have 12 volts at dis,i have a good 5 1/2 psi fuel ????????? at least i won an award and 2 others i painted took best in class,,, thank you much

  11. #11
    68RATVT's Avatar
    68RATVT is offline CHR Member Visit my Photo Gallery
    Join Date
    Apr 2007
    Location
    Clovis
    Car Year, Make, Model: 39 Plymouth 2 dr sedan 360/727
    Posts
    97

    The only reason I ask is I pulled a stupid on my 427,had 12vlts until she warmed up,then it dropped to 6ish, forgot about the resistor in line wire....It did exactly what yours sounds like, a ghost in the machine...
    Also make sure your dist is supposed to have 12 and not knocked down to another voltage..
    39 Plymouth 2-door sedan, 46 Dodge pu, 67 Mustang stock, 01 Road King

  12. #12
    bigjon 454's Avatar
    bigjon 454 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2008
    Location
    Westland
    Car Year, Make, Model: 70 Elky 454
    Posts
    59

    test this theory by running a wire from battery

     



    positive lead direct to the dist.
    1970 El camino,454!!

  13. #13
    Geezer2's Avatar
    Geezer2 is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2007
    Location
    Dunedin
    Car Year, Make, Model: 1976 Cadillac Seville with 454 Chevy
    Posts
    421

    Sounds like a resistor wire from the ignition switch. They were used in point type setups to kick the voltage back to 8-9 volts. The HEI needs 12 volts.

    Try the wire direct from battery positive terminal to dist. Bet it'll run like a charm.

    If it does, just replace the wire from the ignition switch to the HEI. Good Luck

    Oh, you will have to pull the wire off the battery to shut the car off when you run the hot lead.
    Buying parts I don't need, with money I don't have, to impress people I don't like

  14. #14
    yenko ss is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    punta gorda
    Car Year, Make, Model: 68 camaro ss 396
    Posts
    15

    thanks

     



    thanks for the thoughts,, it has no resistor,,painless wiring harness 2 years old ran fine 1-2 years...ill will check that 12 volts in the next day or 2,,,thanks again guys

  15. #15
    yenko ss is offline CHR Member Visit my Photo Gallery
    Join Date
    Nov 2007
    Location
    punta gorda
    Car Year, Make, Model: 68 camaro ss 396
    Posts
    15

    its about time,the car is running perfect...the deal was the distributor shaft had too much slack up and down,replaced gear and shim on distributor...the timming was thrown off by the rotor scraping the contacts on the cap....thanks for the thoughts...usa #1 these colors don't run! you dream it we'll build it! great site!

Reply To Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink