4 cylinder big block weights

Discussion in 'Engines' started by A.N. Other, Apr 6, 2010.

  1. BristolFish

    BristolFish Forum Member

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    What?, the technical section, sorry, must have taken a wrong turn back there somewhere.
     
  2. A.N. Other Banned after significant club disruption Dec 5th 2

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    It's now clear to me what we have here: a photoshop expert, giving us the runaround [8(]

     
  3. danster Forum Addict

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    Far from it Chris, Do not cast these rumours that this is not possible. Both the 8v crossflow and the 20v head both fit this block with out modifications.
    Useful to anyone considering build options.:thumbup:

    The pics were taken with both heads during the mock up stage to check for any clearance problems with either setup.

    Photoshop..... I would not know how to use it!
     
    Last edited: Apr 13, 2010
  4. A.N. Other Banned after significant club disruption Dec 5th 2

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    Bump for alloy block weights!
     
  5. romaingirardlamamy

    romaingirardlamamy Forum Member

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    Now I am really disappointed mr danster
    Been Reading a couple of your thread
    And felt how much you love the 8V head
    Even tho single cam the sturdy 8 valves are heavier
    then the light and refine 16 valves
    That s why there is no need for alloy block on 16 valve


    And now you direct your self toward a 20 valves no no no no no
    Really disappointed mr danster. ;)
     
  6. danster Forum Addict

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    I actually picked up and showed another CGTI member just how light that alloy block was today. ;)
    It will be getting an 8v crossflow head fitted on it. The 20v head was just to show that it can be fitted too.
    I have got the engine to chassis leg mount under development. The cardboard cereal packet has been cut to make a template for block. :lol:
     
  7. A.N. Other Banned after significant club disruption Dec 5th 2

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  8. danster Forum Addict

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    Yes, I definitely think it will be lighter than that set of scales. :thumbup:
     
  9. romaingirardlamamy

    romaingirardlamamy Forum Member

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    I got to reckon it look like a pretty heavy set of scales Lol

    I see that sir danster like to keep us on the edge so

    HOW HEAVY is it?

    Must be pretty light if you fit cereal card box engine mount on it LOL
     
  10. vw_singh Events Team Paid Member

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    I wonder if you will loose enough weight to bridge the power deficit from fitting an 8v ;)

    Gurds
     
  11. romaingirardlamamy

    romaingirardlamamy Forum Member

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    You meant eight anchors LOL
    I know why he can't weight the alloy block
    Its because he broke his scale trying to weight the 8 valves alltogether lol
     
    Last edited: Nov 19, 2010
  12. danster Forum Addict

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    I don't have any scales so not sure about the weight. At a rough estimate, I would think a bare ABF iron block is approximately the same weight as the alloy block with the crank installed.

    I will ask a neighbour to see if they have some scales I can borrow over the weekend and clarify the data.

    The 8v head is 10kgs lighter than the 16v head. No intermediate shaft in the alloy block too.

    Power to weight ratio Gurds, power to weight ratio. ;)

    However a power to weight ratio does not show the handling advantage a lighter car will have when cornering. [:-B]
     
  13. romaingirardlamamy

    romaingirardlamamy Forum Member

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    No but a better balance between front and rear axle weight
    Certainly less under steer

    So I take it the block is roughly 13kgs lighter
     
  14. danster Forum Addict

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    I will try to get it weighed over the weekend.

    The alloy block still has the crank, clutch pressure plate, oil pump, sump, water pump, and crank pulley attached come to think of it. I need to drop out the crank to remove the internal trigger wheel anyway. More weight saving. :lol:

    What with the 7mm valve stems and thinner head studs it is going to be light. That is for sure. :thumbup:
     
  15. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    SO. You don't even have bathroom scales to ensure you are light and lithe for miss d.?[:x]

    Lighter car when cornering my ar5e.:o

    Lightness is to acceleration and braking, as stiffness is to cornering!;)

    Light and stiff is what matters!:thumbup:
     
  16. A.N. Other Banned after significant club disruption Dec 5th 2

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    In the meantime, plenty of time for speculation!

    http://www.coolmagnetman.com/magconda.htm

    Aluminium density showing as 2.7g/cm^3 vs iron's 7.87g/cm^3.

    So back calculating:

    A 36kg KR block has a volume of 4,574cm^3, and an ABF's 40kg equates to 5,184cm^3.

    So (theoretically) the aluminium equivs would be 12.35kg & 14 kg.

    Allowing more for the extra strenthening ribs evident, say 1.3 times (total guess), that gives 16 & 18.2 kgs :thumbup:
     
  17. danster Forum Addict

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    No need for scales to weigh me. I have been the same weight for decades. It seems Miss daved only needs scales to measure the suitor's wallets anyway. (won't be mine ;))

    Momentum daved, change of direction, centrifugal force no? Call me old fashioned but the mass will have an effect. Hence why my old 1.6 8v rocco could hump 4wd Escort Cosworth's in a muddy field at the autocross. :lol:
     
  18. danster Forum Addict

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    Quizz time I think [:D]

    Guess the weight of the alloy block.
    Someone make a table and we can place our bets! :thumbup:
     
  19. Dave

    Dave *Very Smart* Pedantic Old Fart Paid Member

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    This appears not to be 'Elephant Engineering', but real 'Engineering Science'!:o

    Shame on you, you accountant, you! It is up to we Engineers, to explain how the real world works! You lot are supposed to only be able to add up two columns of pennies!:o
     
  20. A.N. Other Banned after significant club disruption Dec 5th 2

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    "Use the cheaper aluminium Dave - just so we can sell the stuff, we don't actually care ;)".

    :lol:
     

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