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460 Ford???

Discussion in 'The Hokey Ass Message Board' started by fory, Nov 14, 2012.

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  1. tjm73
    Joined: Feb 17, 2006
    Posts: 3,336

    tjm73
    Member

    If you run factory heads it might apply, but today's aftermarket heads and intakes make that formula more or less obsolete.
     
  2. OahuEli
    Joined: Dec 27, 2008
    Posts: 5,026

    OahuEli
    Member
    from Hawaii

    Both of your viewpoints have merit. There is so much that can be thrown back and forth; the tried and true method is to do like we did in the "olden days" and actually try different carbs on a motor to see how it responds. Camshaft lift and duration can effect results too. What might work well on 460 "A" motor might not be so great on 460 "B" motor. It all boils down to the internals. All I can speak for is the experiences I've had with my own motors as well as my friends' and customers' motors. Too much carb kills, too little carb kills too.
     
  3. OneBad56
    Joined: Dec 22, 2008
    Posts: 534

    OneBad56
    Member

    Volumetric Efficiency does take aftermarket heads and and intakes into consideration somewhat. As indicated, it's not perfect but its a good base to start from. Carbs are just too expensive to have several CFM sizes to play with until one finds the perfect one.

    Holly has a carb selector formulae based on this:
    holley.com/applications/CarburetorSelector/CarbSelection.asp
     
  4. RichFox
    Joined: Dec 3, 2006
    Posts: 9,883

    RichFox
    ALLIANCE MEMBER

    I started with an 800 Holly on my 460. Ported stock '69 Lincoln heads, 12.5 CR, big Crower flat tappet cam. Ran good. Tried a 1150 Dominator on the same Offy Port-O-Sonic manifold modified for the bigger bore spacing and with an adapter for the bolt pattern. Started good out of the box. Idled good, good power. I loved it. That's all I know about 460s Oh yeah. Even Garlits thought it sounded strong.
     
  5. I run a 780 Holley on my good one, a 600 on my stocker - both are 429s.
     
  6. Mine likes an 850 cfm carburator for shifts at 5K. on the street with a mild cam I've found that 750 is all around good, milage and performance.
     
  7. Engine man
    Joined: Jan 30, 2011
    Posts: 3,476

    Engine man
    Member
    from Wisconsin

    This is the first time I've heard good mileage used in reference to a 460.;)

    I worked at a Ford dealer in the late 70s and 13.6 mpg was the best I ever saw on bottle runs. Of course these engines were used in big heavy cars and trucks.
     
  8. FLATHEAD VICKY
    Joined: Jun 4, 2008
    Posts: 113

    FLATHEAD VICKY
    Member

    Thanks for all the info. Does any of you 460 guys have a crank and water pump pulley set up for sale Mine has a 3 groove crank and a2 groove water pump and I'm having clearance problems. Thanks. Chris
     

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  9. 57countrysedan
    Joined: Oct 28, 2012
    Posts: 370

    57countrysedan
    Member
    from NY

    Yea went a week now with the smaller one. Figures id get back to u. With the 770 and tuning as good as i can (sarcasm not bragging) noticed good off the line performance into about the 3500rpm range. Felt like it would get winded around there. Thought maybe a lil lean so i jetted up two sizes and did the paper clip test (real science here baby) to see the secondaries opening. Since putting on the smaller card (670cfm) and once again tuning like a champ noticed the motor was alot snappyier. Felt better low end. Also doesnt feel as winded on the highway. So think im goin to leave it alone. Thanks for all the help!


    Posted from the TJJ App for iPhone & iPad
     
  10. Project Paladin
    Joined: Nov 10, 2012
    Posts: 229

    Project Paladin
    BANNED

    Well if I wasn't sold on the 460 before I am now. Great info.
     
  11. OahuEli
    Joined: Dec 27, 2008
    Posts: 5,026

    OahuEli
    Member
    from Hawaii

    I'm glad you have come into the light, Grasshopper. :D Whatcha gonna put one in?
     
  12. Project Paladin
    Joined: Nov 10, 2012
    Posts: 229

    Project Paladin
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  13. I just take that outer groove off with a die grinder when I run into that.
     
  14. OahuEli
    Joined: Dec 27, 2008
    Posts: 5,026

    OahuEli
    Member
    from Hawaii

    Do you have a build thread we can check out?
     
  15. Project Paladin
    Joined: Nov 10, 2012
    Posts: 229

    Project Paladin
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  16. OahuEli
    Joined: Dec 27, 2008
    Posts: 5,026

    OahuEli
    Member
    from Hawaii

    No probs, just keep us apprised of your progress. Sounds like a fun project.
     
  17. ADVANCE1
    Joined: Nov 9, 2008
    Posts: 270

    ADVANCE1
    Member
    from Ohio

    Sense? so your telling us that with the same combo your going to make the same HP with 31 less cubic inch, really. Show me any old school engine that's naturally aspirated with a cam that has a duration in the 220s at 50 thousand that can make 505 hp, it isn't going to even come close. I have built many 460 combos so I have a little knowledge on the subject.
     
  18. Model A Mark
    Joined: Apr 30, 2008
    Posts: 1,264

    Model A Mark
    Member
    from dallas
    1. Holley 94 Group

    Hey guys, I'm building my first blower motor, plan on putting a 871 blown 460 in my "A" sedan.
    Stock crank and rods for now, Ross pistons, and the biggest cam I can get in it.
    I need some advice on carbs, I'm going to Decatur swap this weekend and would like to find some carbs, just not sure what to look for.
    I'm thinking a pair of 750s ?
    Any advice would be great.
    Thanks
     
  19. THE FRENCHTOWN FLYER
    Joined: Jun 6, 2007
    Posts: 2,937

    THE FRENCHTOWN FLYER
    Member
    from FRENCHTOWN

    If you plan to drive it on the street you will be much happier with a smallish cam and 600 or 650 carbs.
     
  20. powrshftr
    Joined: Mar 29, 2013
    Posts: 4,550

    powrshftr
    Member

    There's a guy on here right now in the classifieds with a pair of 750 blower carbs for sale.I think this is your lucky day.


    Posted using the Full Custom H.A.M.B. App!
     
  21. Model A Mark
    Joined: Apr 30, 2008
    Posts: 1,264

    Model A Mark
    Member
    from dallas
    1. Holley 94 Group

    hey powrshftr whats diffirent about a blower carb ?
     
  22. Relic Stew
    Joined: Apr 17, 2005
    Posts: 1,122

    Relic Stew
    Member
    from Wisconsin


    The stock crank and rods will be ok if you keep the RPM reasonable.

    For the cam, you want to keep the valve overlap to a minimum with a blower, so you want a wide lobe separation, something like 114° or 116°, and also keep the intake duration in check.

    Narrow lobe separation and high valve overlap gives a cam that lopey idle, and helps make power in a naturally aspirated engine, but a rowdy cam with a blower just dumps the boost (and fuel) out the exhaust.
     
  23. saltflats
    Joined: Aug 14, 2007
    Posts: 9,896

    saltflats
    Member
    from Missouri

    The blower carbs will have a boost reference power valve system.
     
  24. Model A Mark
    Joined: Apr 30, 2008
    Posts: 1,264

    Model A Mark
    Member
    from dallas
    1. Holley 94 Group

    thanks for all the help guys, i love the HAMB.
    Im going to the swapmeet in the morning, how can i tell at a look if the carbs have a boost reference power valve system ?

    hey and thanks for the cam info relic, got any suggestions for a cam ?
     
  25. saltflats
    Joined: Aug 14, 2007
    Posts: 9,896

    saltflats
    Member
    from Missouri

    It will have a separate vacuum port that would go to the intake sorry done have one in front of me right now or I would take a pic.
     
  26. Model A Mark
    Joined: Apr 30, 2008
    Posts: 1,264

    Model A Mark
    Member
    from dallas
    1. Holley 94 Group

  27. powrshftr
    Joined: Mar 29, 2013
    Posts: 4,550

    powrshftr
    Member

    Isn't that just for carbs used in a blow-through application....?
    I'm not being a smartass,I'm just asking because I've got my 6-71 sitting in front of me (in my living room..haha) and I will need to look into a carbureted setup as a backup plan if my injection plans don't work out....


    Posted using the Full Custom H.A.M.B. App!
     
  28. saltflats
    Joined: Aug 14, 2007
    Posts: 9,896

    saltflats
    Member
    from Missouri

    No the the port is for boost reference and needs to be hooked up on the boost side of blower so the carb can inrichen the fuel under boost condition
     
  29. powrshftr
    Joined: Mar 29, 2013
    Posts: 4,550

    powrshftr
    Member

    Because the power valve only works when the vacuum drops off,not when the blower is making a stronger vacuum signal....Gotcha.Had a brain fart there.Thanks.:)


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  30. Model A Mark
    Joined: Apr 30, 2008
    Posts: 1,264

    Model A Mark
    Member
    from dallas
    1. Holley 94 Group

    Hey guys, I need some help with the pulley set up.
    I want to run the stock mechanical fan, and alternator, and would like to run the power steering pump,
    This 460 with a 8v71 is going in my 29 tudor sedan, street driver, so id really like power steering.
    I've never had a blower on any thing, so I'm wondering how the bottom blower pulley will work with the accessory belt pulley?
    I need to get the front of the engine set up so I can start sitting the engine in the chassis.
    Thanks
     
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