total timing question

New Hemi Engine Swaps

  1. swifter

    swifter Well-Known Member

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    So been awhile since i posted in this section, so those of you having your transplants done what did u settle for on total timing? ?? I've done some reading and doesn't seem they need as much as first thought what did u guys find out?? Thanks steve
     
  2. 4speeds4me

    4speeds4me Well-Known Member

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    Everything I have been reading says 20* is all they want/need...
     
  3. oldkimmer

    oldkimmer FABO Gold Member FABO Gold Member

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    ...................20degrees fir initial............34-40 for total...............kim...........
     
  4. RustyRatRod

    RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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    What are you doing with it?
     
  5. Cevidicus

    Cevidicus CevidiGrinch

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    He is talking about gen 3 hemis. Which only like 18-22 or so degrees...
     
  6. Uhcoog1

    Uhcoog1 Well-Known Member

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    What is your motor build swifter?
     
  7. Map63Vette

    Map63Vette Well-Known Member

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    Carb vs. fuel injection seems to have a pretty big effect on what the motors will tolerate and like for timing. I know I pushed it once on a carb just to see if it would make a difference because I was out of other ideas and it didn't blow up or run any worse. Others have reported good dyno results with high timing on a carb, but the root cause seems to be poor fueling and the timing is more just a bandaid. Most fuel injection builds I see don't tend to top 24 degrees if that for max output and wide open.

    The caveat to this is that timing can go as high as 40 degrees under cruise conditions, but I'm guessing that's not really what you're asking. At cruise with a lean mixture it needs the extra timing to get things all burnt, but that's a whole different ballgame for tuning.
     
  8. joeboy

    joeboy Well-Known Member

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    I'm with Map63, timing is all in about 24* under load. I'm still working on cruise timing and fuel...
     
  9. Rat Patrol

    Rat Patrol Well-Known Member

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    I ran 25 all in with the Modman....I dynoed it up to 28 all in and it made 1rwhp more

    But due to rubbish cylinder pressure..I was able to run 21 initial! - so my experiences are not par for the course.

    With the Eddy dual quad Ill be starting at 15 initial to 23 total - and listening very very carefully!.

    This is not including MAP advance at cruise
     
  10. hemijoejr

    hemijoejr The Le Petomane Thruway

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    15 initial 20 total. Good to hear from you Swifter!! You're looking good!!
     
  11. 72BBSwinger

    72BBSwinger Well-Known Member

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    I think even race gas engines are in the 22-24* range. Im do what HJ did for starters 15 initial 20 total for a safe starting point. Im gonna be the guy with 11.1 static on 91 octane.
     
  12. swifter

    swifter Well-Known Member

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    My motor-392 calies kit,big valved cnc 5.7 heads-950 carb with xv intake-had 518hp to rear wheels on dyno mated to a ceramic disc Mcleod clutch and ol' iron 833 trans,car has run 11.0 1/4 and got kicked off the track,We have 32 total right now and was thinking of dropping a little cause i've been reading they don't need so much and when they dynoed it they didnt play much with the timing which sucked but it is what it is--Steve
     
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