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Ford 300 Engine Build Performance Reccomendations

Discussion in 'The Hokey Ass Message Board' started by tlmartin84, Aug 9, 2011.

  1. tlmartin84
    Joined: Jul 28, 2011
    Posts: 1,030

    tlmartin84
    Member
    from WV

  2. tlmartin84
    Joined: Jul 28, 2011
    Posts: 1,030

    tlmartin84
    Member
    from WV

    Also does anyone other than Cliffords make a valve cover for the six?
     
  3. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    blah blah blah.. TURBO CHARGE IT. TWIN TURBO CHARGE IT!!! .
     
  4. Fordman75
    Joined: Dec 1, 2002
    Posts: 370

    Fordman75
    Member


    They sell more DP's so they are cheaper.

    The OFF'y is better for power.


    The guy that makes the side covers makes a billet valve cover but it's like $1200( CNC'd out of a solid block of aluminum ) . He's working on some cast ones but it's been a few years.

    Personally I prefer a Shelby GT500 Eaton M112 supercharger!
     
  5. prpmmp
    Joined: Dec 12, 2011
    Posts: 1,129

    prpmmp
    Member

    Hey FrozenMerc!! Did you try the m5r2 to the flathead? I have a 302 with a m5r2 in my coupe(thinking flathead in the future) Pete
     
  6. FrozenMerc
    Joined: Sep 4, 2009
    Posts: 3,093

    FrozenMerc
    Member

    I have not tried it, the M5R2 went into my '51 behind the Windsor, so I no longer have it available. If you try, let me know how it works out.
     
  7. tlmartin84
    Joined: Jul 28, 2011
    Posts: 1,030

    tlmartin84
    Member
    from WV

    My engine builder suggest I stay away from the 352, and 390 FE pistons due to weight and the rings, and going with replacement Hyperteutic Pistons. He prefers shaving the block to bump up compression.

    At the same time he hasn't built a 300 engine quite like where I want to go with this one. Whats your opinions on what he says?

    Also Do I really want to raise compression if I am building a low RPM torquer? I plan on running something similar to an Isky mile-a-more cam, or comp cams 252H that produce a lot of low torque.
     
  8. tlmartin84
    Joined: Jul 28, 2011
    Posts: 1,030

    tlmartin84
    Member
    from WV

    AND what about theis supercharger/Turbo talk? Anyone put one on a 300 here?
     
  9. THE FRENCHTOWN FLYER
    Joined: Jun 6, 2007
    Posts: 5,367

    THE FRENCHTOWN FLYER
    Member
    from FRENCHTOWN

    At WOT the engine is already "borderline detonation limited" at the stock compression ratio, meaning you will have to retard the spark to prevent detonation before you can achieve optimun spark advance.

    A slightly larger cam may help this situation a bit - at least move the detonation region higher up in the RPM band, but if I were building an engine for low speed lugging I would leave the compression ratio stock and just try to improve the low-end volumetric efficiency through good head preparation and maybe a set of Chevrolet six (230 - 292) 1.75:1 roller rocker arms. An RV cam with Cloyes adjustable gears advanced 4 degrees, an Autolite 1.08 carb, and some EFI cast dual exhausts, and a clutch fan or electric fan would complete my menu.
     
  10. tlmartin84
    Joined: Jul 28, 2011
    Posts: 1,030

    tlmartin84
    Member
    from WV

    Along with an electric fan I plan to go with an aluminum flywheel and drive shaft to reduce rotating mass.

    I'd like to ditch the AC but the old lady would never ride in it if I did.

    I am on ford six looking at supercharger setups, looks like that may be an option.

    I've got the motor, got the transmission, now its time to clean, rebuild, and piece this thing back together.
     
  11. 302aod
    Joined: Dec 19, 2011
    Posts: 275

    302aod
    Member
    from Pelham,Tn.

    I took out a 300 and put in a 302 out of a Mustang GT in my 81 F150 a few years ago. Thought it would run alot better, but it didn't pull a boat as good as the 300 and I guess the truck weight was to high to run quick. I would rather have the 300 in a truck, but I would keep the 302 in a car. It's cheaper to hop up a 302 and it will rev higher.
     
  12. Fordman75
    Joined: Dec 1, 2002
    Posts: 370

    Fordman75
    Member

    The 302 has it's peak torque at a much higher rpm then the 300 does. You can tow with a 302 you just need a lot more gear.

    With the right modifications a 300 can rev quite high too.
     
  13. sunbeam
    Joined: Oct 22, 2010
    Posts: 6,214

    sunbeam
    Member

    The 300-6 will out torque a 351 until about 3000 rpm so most of your driving it's got more power.
     
  14. 302aod
    Joined: Dec 19, 2011
    Posts: 275

    302aod
    Member
    from Pelham,Tn.

    I changed the rear end from 279 to 325 and it helped some. The 302 would go much faster than the F150 should go. The torque curve was much higher with the 302 and was low on the 300.
     
  15. Fordman75
    Joined: Dec 1, 2002
    Posts: 370

    Fordman75
    Member


    3.25 still isn't enough gear. You need a minimum of 3.73's but 4.10's would be better with a 302 in a truck. If you are running an OD trans then 4.10's is a must.

    That's what I said about the torque.
     
  16. THE FRENCHTOWN FLYER
    Joined: Jun 6, 2007
    Posts: 5,367

    THE FRENCHTOWN FLYER
    Member
    from FRENCHTOWN


    Yup. When people speak to me about comparing these two engines I tell them to "go put that one-barrel carb from a 300 on your 302 - 4V and tell me how that works".
     
  17. 302aod
    Joined: Dec 19, 2011
    Posts: 275

    302aod
    Member
    from Pelham,Tn.

  18. Definately subscribed. :D
     
  19. Al Donelson
    Joined: Jun 7, 2018
    Posts: 2

    Al Donelson

    how did you do with your build?
     
  20. Fortunateson
    Joined: Apr 30, 2012
    Posts: 5,331

    Fortunateson
    Member

    Just saw this thread. I have an Offy 4bbl intake I want to move on and it won't be anywhere near $600!

    Edit: Oops, didn't see the original dates on these postings! Still have the intake though...
     
    Last edited: Aug 27, 2019

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