Not LFS related, hence off topic. For my final year project at univeristy I am modelling a Lancia Fulvia engine in Ricardo's WAVE software to find why tuning the engine for competition work causes a 'hole' in the torque curve at around 4500rpm. Lancia had similar problems in the 70's with the works rally cars, and competition preparers (like myself) have also come across the same problem.
It is suspected that unequal length inlet and exhaust tracts could be causing a harmonic resonance at the above engine speed, but so far nothing conclusive is available. That's my job
However, for the purposes of writing up the report on the simulations I need a bit of information I am finding hard to find - airboxes. Why are they used, what influences the design, how is volume and shape important etc etc - if there was an 'everything you need to know about airbox design' then that'd be great. Does anyone here know stuff about airboxes? I don't want idiots saying 'yeah, drill it innit you'll get more power innit', I want reasonable scientific explanations.
Also, bear in mind that I'm working in relation to proper carburetted cars, not this girl injection malarky, so stuff about massflow sensors isn't required.
Surely there is some here who knows about airboxes? I can cope with the finer points of carbs, inlet manifold design, exhaust design and function etc, just not airboxes
Edit: Also, does anyone have useful information on how to make use of the Helmholtz Resonance effect for airboxes? I have a feeling this could be exceptionally useful!
It is suspected that unequal length inlet and exhaust tracts could be causing a harmonic resonance at the above engine speed, but so far nothing conclusive is available. That's my job
However, for the purposes of writing up the report on the simulations I need a bit of information I am finding hard to find - airboxes. Why are they used, what influences the design, how is volume and shape important etc etc - if there was an 'everything you need to know about airbox design' then that'd be great. Does anyone here know stuff about airboxes? I don't want idiots saying 'yeah, drill it innit you'll get more power innit', I want reasonable scientific explanations.
Also, bear in mind that I'm working in relation to proper carburetted cars, not this girl injection malarky, so stuff about massflow sensors isn't required.
Surely there is some here who knows about airboxes? I can cope with the finer points of carbs, inlet manifold design, exhaust design and function etc, just not airboxes
Edit: Also, does anyone have useful information on how to make use of the Helmholtz Resonance effect for airboxes? I have a feeling this could be exceptionally useful!