88b16civic

works better then a plenum?? you dont have a before and after. It prob that way because of packaging.

You could do the whole sidewinder idea but have the plenum inline sidways between the merge and the TB if itll fit. You wont get any resonating effects but itll still work as a volume reserve.

Fang

Lots of factory engines use this intake setup, Toyota 1ZZFE and GM Quad4 are the two that I know for sure right off. Neither has any real plenum, just aluminum runners, collector, flange, & throttle body.

ProjectDC2

go look at a stock intake manifold on a 05 toyota corolla.

on teh camry . samething.


also its alreayd been done. by cody at lovefab for his h22 motor

Bone1

and to think Mopar started all this.........

Google "Max Wedge Mopar" and look at the intake setup........

Tom-Guy

There are several instances where, despite indicated flow based on pressure differentials, flow is reversed due to harmonics. Read a couple of the free-to-the-public Masters/PHD thesis on Linkoping U's website. I believe it was Per's one on poppet valve EGR systems.

No reason a fancy-pants merge IM wouldn't work. Since divergent flow is more resistant to seperation than convergent flow, it wouldn't even have to be a particularly shallow cut merge collector.

As far as the supposition of lotsa maths and lotsa dyno time to design an intake manifold - a fig on thee! The math is more complex than a lot of the big name manifold designers get into, not that they particularly bother - it is imposible to hold real world conditions to ideal applications of physical laws. In the real world you math up an approximation and then fiddle with different configurations until you get one that makes 0.4% than the others... or you just HMT it like Jeff Frank + others have and slap a bigger plenum on some stock runners, make more power, and call it a day.

Trust me, the more I learn, the more I experience, the more I realize just getting things 90% there and moving to the next weak spot gets you further than spending ten times the work, ten times the money, and ten times the vehicle down time to address half your problems and then leave a bunch of vital ---- hanging. My view of what vital ---- is, is also horribly, horribly skewed