actually plenums that are tapered are designed to balance air flow. If you notice the crawford fits the 350Z so it was not about fitting a 350Z.
As air is travels thru a contained body it will follow the path of least resistance mainly the the back cylinders. Thus the back cylinders will usually run leaner because they receive more air.
On Supra and Nissans which have non tapered plenums usually the last cylinder is the one to detonate. If you do some searching on aftermarket plenums that are made from scratch not just some plate built up on top of the factory one you will find that most are tapered.
Like I said the I don't disagree that the crawford won't power and probably need look again at the crawford and possibly just flow bench it myself but I still think there is a better approach. I talked to Mike Smith from MS performance and he was working on a spacer that would actually more effectively increase the volume of the intake plenum and maintain the taper of the plenum.
Also while dyno numbers do show results it does not show how well the plenum would work if you increased the volume and maintained the taper. I will call crawford and ask them for some flow numbers on their plenum I will post if I get any numbers from them.
The Greddy Kit can be had for 5K brand new, all the super charger kits are the same cost. How is it more expensive? The Procharger and the Vortech are the same price point. The stillen is actually around the same price in its stage 2 and 3 variations.
The Greddy FMIC does cost extra but it is not needed to produce the same numbers the others do with there intercoolers.
Very valid point the Greddy is more troublesome to put on as you have to remove the exhaust headers and oil pan and etc. But I think that it gives you the option to grow the vehicle for more power in the future and does not necessary eat up gas all the time or have a whine that Super chargers do.
Actually turbos act as a 1/3 muffler so cars equiped turbos are actually quiter by design not that most people don't put loud exhaust on them anyways and cancel that feature out.
Damm you got me on your last pharagraph Z06 will stop beat an FX even if only slightly modded (well it would be close a greddy kit putting down 400RWHP on race gas ) but you can always go home and get your fast car instead. And remember you are really comparing apples to oranges here Z06 versus FX not a fare comparison maybe versus a Porsche Cayenne or Dinan X5
I know I should be grown up about my cars and stuff but **** thats just not any fun
I apologize to you guys for ranting on I am car nut and get carried away some times. MustGoFastR keep bringing it on and never grow up and give up hope on what you want to do. We have done some cool things to some odd cars for example we put a single turbo kit on a Mercury marauder that made 525RWHP which will spank a Z06 in a straight line, we put twin turbos on Lexus SC430 that is currently putting down 500RWHP on mid boost on a built tranny, so my final point sure you can beat a Z06 when your FX it will be more troubles to take the beaten path but at the end of the day to watch that Z06 owner face to know he got beat by a FX would be priceless
Here is an example one of our customers dreams .. This a twin turbo widebody with custom interior and stereo we have done.
http://www.anderson-audio.com/sc430/Sc430-roll.AVI
All sorts of more pics and stuff here
http://www.anderson-audio.com/sc430/