Quote:
Originally Posted by steve05ram360
Sharing some lessons learned, I'd expect you guys already know this......................
Inspired by lessons learned on the Ram relating to the intake tube I set out to add a turning vane at the elbow on the intake tube...............
Motivated by the performance bump I decided to play with expanding the manifold capacity by adding what I call a potato launcher tube off the brake vacuum hose. The original idea was to smooth out the vacuum variations in the intake manifold. The benefit was again immediate and to my surprise, bottom end torque jumped quite a bit. Further experimentation with the trucks setup taught me that I could shift the torque peak up & down the rpm range. Was pretty shocked by that........................
Anyways... lessons learned and lessons shared...
Forgot to add... I pulled the airbox snorkel and power shifted up the rpm range.
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I met an engine intake specialist from S. Korea about 15 years ago he was a guest/coworker of someone at a family Thanksgiving gathering. In short with many false generalizations and exceptions to the rule he said; the longer the intake tube the better the low end torque at expense of the high rpm power and vice versa the shorter the intake tube the worse the low end torque is but the power band moves upward to the higher RPM's.
Porsche addressed this with their
VarioRam induction system, a system that kind of varies the length of the manifold air intake.
I could not find a good animation that explains the opening of the various intake chambers, but I think of it like a winded musical instrument, perhaps a trumpet with three valves that in effect shorten or lengthen the intake length.
https://talkingtrumpet.wordpress.com...-animated-gif/
