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  1. Replies
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    im an amateur CFD person but have been doing...

    im an amateur CFD person but have been doing professional FEA for over a decade now. since starting using ansys CFD became available and i just learn from a peronal point of view

    ive never done...
  2. Replies
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    maybe no one is active in this thread but i dont...

    maybe no one is active in this thread but i dont think this graph is correct. cylinder 1 is at TDC on the induction stroke every 720* so on a 6cyl the offset between each cylinder should be 120* ?...
  3. M10: IMO the rods are more of a marvel than the block....

    IMO the rods are more of a marvel than the block. there would not be many applications that involve higher compressive loads. the rods looked very beefy as in topfuel beefy
  4. M10: in the modern world of F1 being strong is merely...

    in the modern world of F1 being strong is merely one aspect. hopefully it doesn't need to be said that it needs to be strong enough to withstand the loads it is subjected to, that is obviously a...
  5. M10: the blocks weren't designed to be used for F1...

    the blocks weren't designed to be used for F1 when conceived, so who cares about F1 this doesnt make a block "good". they just raided the parts bin and found the M10 blocks were able to do the job...
  6. M10: assuming newer blocks prove themselves not to...

    assuming newer blocks prove themselves not to fail prematurely outside staistical variations then newer blocks are without a doubt better engineered. in order to make something both lighter and...
  7. M10: i don't get my rocks off on things that are...

    i don't get my rocks off on things that are excessively over engineered and make pretty looking numbers.

    it doesn't take a good engineer to over engineer something. As a modern mechanical...
  8. M10: only a few years ago rumours were 1500bhp, in...

    only a few years ago rumours were 1500bhp, in another 5 years rumours will be that they were making 2000+bhp......the way i look at it is the M10 block was too far over designed as a production block...
  9. S54: im pretty sure that the graphs in the OP are not...

    im pretty sure that the graphs in the OP are not whp. with dynodynamics the "S_hp" is estimated crank hp (whp x 1.2). a whp graph will say "hp" without the S. if it is from the UK then this is...
  10. S54: absolutely it is natural variation, chassis dynos...

    absolutely it is natural variation, chassis dynos are just not that repeatable plus statistically each engine is different. different wheels and even different brand tires of the same size can...
  11. S54: its like ~2% which is insignificant. there...

    its like ~2% which is insignificant.

    there isnt much chance that a stock capacity S54 will make 280wtq with those mods so i call BS on the 10-12% lower than DJ. the before and after gains are...
  12. delete this pls

    delete this pls
  13. Was more looking at tq/L (closely relates to...

    Was more looking at tq/L (closely relates to BMEP) this is a good look at how well tuned an engine is simply making power with more revs is not hard in today’s world with a 4V engine.
    Out of the box...
  14. you cant even do a proper built old school 12V...

    you cant even do a proper built old school 12V inline BMW for less than 12-15k and you'll end up almost 100 horse short of the S54 so its not much when you look at the whole picture.

    both S65 and...
  15. S14: the overlay is excellent. would be good to see a...

    the overlay is excellent. would be good to see a bone stock 2.3 on the VAC dyno (provided it was fresh low km engine) for comparison
  16. S14: any on the same dyno thought?

    any on the same dyno thought?
  17. S14: in isolation they mean nothing the good aspect is...

    in isolation they mean nothing the good aspect is the overlay to give some meaning
  18. S14: yeah, but there is an easier way to get numbers...

    yeah, but there is an easier way to get numbers with less speculation that's all.

    i'm more interested in the specs of the engine though and what potential the s14 head has in general for making...
  19. S14: if people want dynojet numbers then you really...

    if people want dynojet numbers then you really need to take it to a dynojet, otherwise its purely speculation based off a completely different vehicle tested across almost 3 months. you could spend...
  20. S54: fyi, metric mechanic offset grind S54 cranks to...

    fyi, metric mechanic offset grind S54 cranks to 93mm for their M50/52/S52 engines. the S54 bearing being 51mm vs 46mm for the M52/S52 rods makes it a common size bearing but length still is off but...
  21. some more considerations: - calorific value of...

    some more considerations:

    - calorific value of the fuel to consider (heat release per unit mass)

    - latent heat of vaporization. some fuels can increase power is if they take heat away from the...
  22. Replies
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    i am not really convinced that having all runners...

    i am not really convinced that having all runners drawing from the plenum at the same time gives a realistic picture. if you look at the firing order and cam profile for each cylinder and plot it out...
  23. S54: Mike, got any dyno plots of some NA builds you...

    Mike, got any dyno plots of some NA builds you can post?
    how much does the crank weigh?
    does it require a slightly different spec harmonic balancer?
    do you retain stock rod length?
    What rpm...
  24. the lack of material forming a direct load path...

    the lack of material forming a direct load path between bearings significant this rod is obviously not for a high BMEP big bore engine which needs good compressive strength. i still think there is...
  25. if they machined those teardrops and slots from...

    if they machined those teardrops and slots from bothsides and not all the way through leaving 2mm in the centre the stiffness (so it is has shear strength for carrying bending loads) would be alot...
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