a buddy of mine has a honda. most of the accord/prelude motors have a "variable" intake if you want to call it that. anywho, around 4800 rpm (indicated 5k on the tach) you can hear the secondary intake runners open up. quite interesting. These honda motors have the "variable intake" that you guys call it: H23A1, H22A, H22A1, H22A4, F22B, F20B, F20C, as well as various civic motors. this began in the US in 1992. why did nissan start putting them in their cars? will nissan ever have variable valve timing similar to that honda has (and everyone wants)? I'm sorry, but a maxima would get own3d by VTEC. I want to make my car faster to beat his car. some guy in town has the MEVI its cool, but just doesn't do it for me. The intake manifold is too small for the amount of air the VQ30DE needs as well as the exhaust manifold. For more power in N/A applications, one would need: increased IM/TB diameter, increased exhaust diameter, and perhaps increased compression along with a higher lift for the intake cam....correct? this is all judging by laws of physics. how can i get the most power out of my car, N/A, without installing the MEVI that everyone worships?

 

Nissan put variable valve timing in the Maxima but not until 00 on the VQ30DE-K, and later in the VQ35DE. Before that, it was on the Neo VVL (basically an SR20DE w/ variable valve timing AND variable lift).

A Maxima would get owned by a VTEC? My Max is pretty much stock, all I've done to it is STS and gutted catalytic. I take EVERYTHING that came from Honda, except the S2000 and "built-up" B16, H22 motors... yet. But just to give SOME credit to Honda, VTEC is a beauty after 90mph (too bad its top speed is not so far after that ).

How did you determine that the MEVI is "...too small for the amount of air that the VQ30DE needs..."? I do see your point about larger diameter = more air for the engine to make power. This is true UP TO A POINT. The thing is that the larger the diameter, the less velocity of the air (you must have been asleep in Physics when the teacher presented that one, ). You want to keep this velocity as well because when you start to loose it, power goes with it. This is y it's not recommended to put a 3" catback on a none force-inducted Maxima, or 4" intake tubing.

How to get more power w/o the MEVI on an NA motor. JWT ECU, JWT Cams and valve springs, y-pipe, intake, Aluminum flywheel, str8-pipe OR gut catalytic (I'm in FL, I got no emission laws anymore ), catback. If you want to go extreme: Custom JE forged Aluminum 11.0-1 pistons, UDP, remove the AC compressor and power steering pump, Walbro fuel pump, JWT fuel injectors and adjustable fuel pressure regulator, port and polish the heads and the lower intake plenum, boring the T-body and the MAF, there's always Nitrous and alcohol. That's all that comes to my mind. Oh! a VTEC sticker always help, those r good for 5 HP !

 

well sheesh

 

What does you post have to do with your thread title??

You start talking about variable intake manifolds then variable valve timing.....you do know those are two different things right. Nissan use variable valve timing before Honda did......Nissan just did not market it like Honda.


Vetec does not "own" anything. No NA accord or prelude is real threat to my bolt-on NA VQ30.