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  1. S54: torque below 3k seems slightly low, otherwise...

    torque below 3k seems slightly low, otherwise makes what is expected for basically stock engine
  2. they used a bigger cylinder spacing to be able to...

    they used a bigger cylinder spacing to be able to use a bigger bore and shorter crank. no doubt to give themselves room to increase the size in due course. the factory wont want to be upping boost...
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    i wouldn't worry about rod ratio its not going to...

    i wouldn't worry about rod ratio its not going to save the bottom end in that scenario a 5mm longer rod wont alter peak piston g's enough, the S54 strokers are worse for rod ratio.
    Only built...
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    from headflow thread there is alot more than 10%...

    from headflow thread there is alot more than 10% hiding in the N54.

    flinchy you gotta ring him and he will get you to send it down and then youll be in the queue.....
  5. running someone down in the topend its about...

    running someone down in the topend its about absolute power and drag, weight wont really affect top speed to any great degree in comparison to drag and power to weight tells you nothing.

    A 1000hp...
  6. S54: bone stock engine just wont make 250wtq on a...

    bone stock engine just wont make 250wtq on a normal dynojet. 250wtq from a 3.246L engine with 262tq at fly is just not reality.

    the S54 is not an underrated engine so stock should be 230rwtq +/-...
  7. S54: posting graphs goes a fair way to prove it is not...

    posting graphs goes a fair way to prove it is not BS.

    surprisingly 15% loss at peak power and 12.5% at peak torque for RWD manual seems to be pretty accurate for stock vehicles and e46m3 fits...
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    or in otherwords without a highend 1D sim that...

    or in otherwords without a highend 1D sim that acoounts for these phenomenon to tell you pressure history and feed it into a 3D analysis it is still more accurate to build a prototype and and test...
  9. S54: +1. could just be the stock number is a poorly...

    +1.

    could just be the stock number is a poorly maintained car and the dyno is inherently a little happy. any exhaust change that hurts bottom end like that might produce positive effects elsewhere...
  10. S54: ive seen S54 with vanos disabled and the bottom...

    ive seen S54 with vanos disabled and the bottom end didnt take a hit like that. i have seen mods to an S54 where the x-pipe was replaced with a y-pipe and moved very close to the engine effectively...
  11. S54: wonder what they did to the exhaust exactly, they...

    wonder what they did to the exhaust exactly, they certainly did well to savage the bottom end...... a loss of 70wtq at 2500rpm.

    "stock" was quite rich at the topend to which always elevates the...
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    i always inflate the mesh at the surface and...

    i always inflate the mesh at the surface and check mesh quality, i did a 5 day training course with ANSYS fluent (not CFX) where that was convered but have not done much hands on since so have...
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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...
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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* ?...
  15. 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
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...
  21. 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...
  22. 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...
  23. 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...
  24. delete this pls

    delete this pls
  25. 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...
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