This is a much closer race than the one above.
A few days after spending the better part of the day making the air box I found I needed to trash it. I went back and forth with Moncef from Admintuning (cool guy btw) and he didn't like the way the silicone 3-4" adapter looked as though it was binding on the t.b. I noticed, after all this time, that it's also too long. I started looking at photos of Admin's and LMT's, thought about how detrimental the 45* extension and added length I added to it a few weeks back and I can't believe I missed these obvious details. Similar to the check ball/spring switcharooney I pulled when installing the transgo.
I removed 4 1/2" from the length and got the coupler to sit straight on the t.b. Took it out for a spin and I think I got the rest of the hp/tq I expected from this mod. Got a 75mm 09-14 Maxima t.b. and pig tail on the way. That'll get installed but before it does Ima taper the inlet opening and both ends of the 4" aluminum pipe for a smooth transition. Also fittin on opening up the elbow on the inside bend of the v-plenum a bit. This elbow on the DE intake is a well known restriction and the composite material should make the work a breeze. Then I have to figure out a new heat shield for the filter. Idle is erratic and so are the iat's.
Will install 75mm t.b. straight to the v-plenum, no "adaptor plate". Just have to line up and drill new holes.
I'd like to make a new upper collector/plenum with the "neck" facing the battery box to straighten it out, then move some shit around in the brake box, cut a hole in that panel adjacent to the firewall and rather than install an air filter, line the inside with filter media, move the a/c heat fresh air intake vent and make a cowl induction intake there instead. I'll get right on it

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Found this recently. Titled this quote "FLOW DYNAMICS FOR INTAKE PIPE DIMENSIONS". Quote below;
"But, BY DEFINITION, the tubing is a restriction. The fact that air is flowing through it causes a loss of pressure. Make it large enough, or short enough, and it will become an insignificant restriction, but it is still causing a pressure loss, and reducing the density of the air in the cylinders = less power. Making a piece of tubing twice as long will double the pressure loss. Adding bends to the tubing will increase the pressure loss. Say going from a 3.5" inlet that is 3 feet in length to 4" inlet that is 4 feet in lenght? Or a 4" inlet that is 2 feet in length, etc? Making the diameter larger decreases the pressure loss, and making it longer adds some back in. Just playing with numbers, increasing the diameter from 3.5->4.0" decreased the pressure loss by about 25%. Changing the length from 3ft->4ft increased the pressure drop by 33%. So, your larger, longer pipe has more pressure drop than the smaller diameter, shorter one. (These are "rough" numbers for illustrational purposes only). If you increase from 3.5"->4", and shorten the length from 3ft->2ft, you will reduce the pressure loss. What you really need to look at is the magnitude of the pressure loss. You have 14.7psi available at the air filter to push air into the cylinder as the piston drops. If the ducting is costing you 1psi pressure loss, its reducing the potential power by 6.5%."