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TDC problem.

Discussion in 'The Garage' started by Anthonviking, Jan 16, 2006.

  1. Anthonviking

    Anthonviking Registered Member

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    Iam helping a friend swaping his B18 (1.8 liter) volvo engine out of his Antitank wehicle. He found a donor out of his chevy van. Its a 305 year 84. We have kind of lost timing. So how many degrees TDC is a 305 1984?
    [​IMG]

    anthon/FS
     
  2. BIG*RED

    BIG*RED 1/2 ton status

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    If i am understanding your question right TDC should be 0 degrees with the number 1 pistion in full up stoke..

    as for ignition timming i would start at 6 degreeb before tdc..

    i hope i answered your question
     
  3. muscle

    muscle 1/2 ton status

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    if your speaking of ignition timing i would start at 12 btdc
     
  4. big83chevy4x4

    big83chevy4x4 3/4 ton status

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    my dads 85 305 ignition timing is 4* BTDC
     
  5. BIG*RED

    BIG*RED 1/2 ton status

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    12 degress BTDC on a 305?...wow never heard that.. my 350HO with high compression and 93 octane gas is only at 10 btdc....
     
  6. muscle

    muscle 1/2 ton status

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    wow big differance in base timing here so far. my 305 would run like crap at anything less. wonder if altitude was part of that.
     
  7. muscle

    muscle 1/2 ton status

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    my 400 sbc will backfire at anything less that 14
     
  8. BIG*RED

    BIG*RED 1/2 ton status

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    Yes but look at the picture, were talking about what apeard to be a stock 305 low compression, maybe 120hp if he is lucky..

    and there is a slight difference between a 400 and a 305..

    6 or 4 btdc is a good place to start
     
  9. theperfectgarage

    theperfectgarage 1/2 ton status

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    Yeah, but dont forget your elevation, I run 12-14 in the White mtn,s and 8 here in Tucson. BTW I pm'ed ya.I'll get you info tonight on discs.
     
  10. Anthonviking

    Anthonviking Registered Member

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    Yeaa. Lots of numers to test..... So far, actually earlier to day we tried 8 deg BTDC and it did NOT work (thats what my chevy 76 run).

    anthon/FS
     
  11. theperfectgarage

    theperfectgarage 1/2 ton status

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    # 1 piston at tdc and both valves CLOSED, thats tdc, otherwise your 180 out.
     
  12. Anthonviking

    Anthonviking Registered Member

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    Sheoldeblaze! You are a real "sharpeye". Yepp its a stock 305 120 hp. But alot mor fun than its original B18 aprox 40 HP!!!! Iam great thankful for all of your kvick answers. THANKS!!!!!!!!!!!

    anthon/FS
     
  13. muscle

    muscle 1/2 ton status

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    definately what i think it is...


    ill go with that
     
  14. Anthonviking

    Anthonviking Registered Member

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    That is checked out. It have been running, but just for some minutes and then it loses power and stops and wont start up!

    anthon/FS
     
  15. muscle

    muscle 1/2 ton status

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    fuel blockage? if not then check ignition module, coil
     
  16. Anthonviking

    Anthonviking Registered Member

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    Fuel there is and coil is ok.....

    anthon/FS
     

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