Intake Resonance tuning.
Recently I had posted something here and someone got upset and suggested it was an “opinion” and “wrong”. If you want to question the following you are welcome. However, just saying “you posted something wrong and need to retract it” is pitiful and won’t be responded to (or may even be deleted). Please, add to the discussion with constructive criticism and further the learning here for all.
I am quite interested in the topic of resonance tuning. Here is a fairly good youtube explanation of a few principles. I thought it was a good one. If you have something better please share.
I have been reading up about exhaust resonance tuning. Merge collectors, four into one vs four-two-one, exhaust angles needing to be less than 15deg so as not to harm flow and so forth are things I’ve known about for years, and have a tiny bit of first hand dyno experience through the development one friend does on his race car. Tonight I was reading a bit by a ex F1 engineer about headers not needing to be equal length so much as “equal volume” for computational analysis and then only improved through real world testing. Of course cylinder temperatures diff and hence exhaust speed in runners will never be equal and the radius of bends has an effect too. When I find a simple explanation, preferably visual I will share.