^^The explanation to explain what is going on here is that you are either:
1. Extremely confused
2. Honda troll
3. Nissan Noob.
4. All of the above.

 

OP: I understand exactly what you're talking about. Although I do not know whether our VQ acts similiar to that of a VTEC. Let's say on the Hondas, VTEC kicks in at 5200rpm, you can use a VTEC Controler to lower VTEC engagement point to whatever you desire. I just don't think our VQ have similiar variable valves like such.

What I can tell you is this: mod your car and use MM. You didn't state neither of those. Let me tell you something about my car. When it was bone stock, I would shift at about 6200-6300rpm and the ECU would shift around redline, sometimes bouncing off. I then installed Motordyne 5/16 spacer and have to upshift around 6000rpm, cuz it was pulling hard and the rpm was flying. I had a hard time avoiding bouncing off the rev limiter. I then installded Gordgee Grounding Gear, and let me tell you what a difference it made, I now can let the needle goes past the redline then upshift and it would not hit the limiter, sometimes it does, it still upshifts right away. (Note: All these are upshift from 1-2-3, I commute 100% city and I-95 here in SoFL are too crowded to go WOT)

I'm saying that cuz if you shift higher, your rpm drop will be higher, and hopefully it stays higher in the powerband.

Hope that helps.

To all you guys: If you don't have anything nice to say, DON'T say anything.

P.S. Get the 1/2 MD spacer if you want more top end power.

 

It's a public forum, buddy. Stupid questions get stupid answers.

I bet you were a hall monitor when you were a kid,

 

jonny, i dont know what your problem is but if you dont know what im talking about then why do you find it necessary to continue to post unhelpful posts? it wasnt a stupid question. you just give stupid answers. if you dont know what is going on then your opinion is not needed. its simple.

my question wasnt directed at people that dont know. if you know what i am referring to then post. but two people cannot speak for the entire forum. as i said before, the mere fect that there are hundreds of 2006 g35 owners on here and 2/3rds of those are equipped with the automatic means SOMEONE on here might relate...

thank you jonny for your useless input, but it is no longer needed...

if anyone that knows what im writing about can offer any inout that would be appreciated...

 

first, i think my initial two responses to o.p. were very polite and answered the question...possibly not to the o.p.'s liking but definitely answered. second, the definition of NOOB is someone with a low post count--so yeah, because you joined recently and have a low post count, you are a NOOB. third, judging by everything the o.p. has posted, he has no idea about cars. specifically, the cars he has owned. vtec is not a variable cam, it is variable timing and the vq35de has no such thing.

if a noob comes on here and shows a lack of knowledge and is insistent on something of which he has no idea and wants to reply with an attitude, he is going to get some not so nice responses.

 

+1

 

This is the nicest input I can give you:

1. There is no "changeover" on ur car, hence there can be no adjusting of it.
2. What you are likely feeling/hearing is the engine and exhaust system operating at near peak power.
3. Early VQ's are very "buzzy" at higher rpms--this is likely what you are experiencing.

 

I used to have a Honda Civic with SOHC VTEC so I think I kinda know what you are trying to compare it to. The VQ has a "continuously" variable valve timing on the intake side. Only the new G37 has VVEL which is variable valve timing on both the intake and exhaust sides. The Honda's VTEC run on 2 valves per cylinder in the lower revs to try and optimize for low end torque. But once it hits the factory preset rpm and VTEC opens up the other 2 valves and advances the cam timing in the higher rpm range for better breathing to optimize for peak HP. The VQ doesn't have this kick. As for your experience at 5k rpm, this is probably due to our peak torque being made at 4800rpm. Revving beyond 4800rpm, HP takes over into redline. I don't have a 5AT so I can't quite compare it to your exact situation. I have a 6MT and therefore gearing will be different. With an AT, there will be a small lag between your actual shift point and when the ECU decides to change gears. And after changing gears from redline, the rpm could fall below the peak torque range and needs to climb back up. As 305aznG35 had suggested, you may want to try installing a Grounding kit to improve the electrical response. I think it would be beneficial in your situation. As well as the 5/16" plenum spacer and also advance timing by 2 degrees.

 

um...Nissan DOES have their own version of variable valve timing. It's not as dramatic as vtec but it does exist.

VVL (Variable Valve Lift) which is used on the Nissan engines and also featured in the 350Z is the CVTCS (Continuously Variable Valve Timing System)

http://www.streetracersonline.com/ar...amshafts/3.php

http://www.gizmag.com/go/7051/

http://www.nissanhelp.com/Ownership/.../NTB06-079.htm

 

thank you GTR. THAT makes sense...

i apologize for getting frustrated with the rest of you. it just seems that if someone cant word what they are trying to say right then they get flamed. hence the low pst count. i am extremely bad at explaining things (obviously)

thank you for your response. that helps a lot

 

To the OP, it is your CAI causing the note change. I just went to a stillen intake system and at 5k it sounds like vtec, I actually immediately called my roommate after i put it in and told him he has to hear this, it sounds like I just got vtec (jokingly...) . He agreed it sounds exactly like his s2k does when it hits vtec. This may be caused by the ztube combo I am running as well, not sure but it is definately associated with it.

 

In a V6 you have 3 pulses [per revolution] of air forced into engine to refill that pumped out, so the frequency of sound created by intake changes with rpm.
4000rpm/60= 66.66 x 3= 200 HZ > 330Hz at 6600 rpm.^^^^^^^^^^

Is this change of frequency what your are referring to as a change in sound?

 

Personally, I feel like my coupe really comes alive at about 4000 RPM.

This is probably because that's where peak torque is.

VTEC is a completely different beast.... you will FEEL and HEAR it... very noticeably. (on a performance VTEC... some VTECs are tuned for fuel economy; varies by the car)

Point: VTEC kicks in at 6000 RPM on this car. Note the huge jump in power and torque between 5800 and 6200 RPM.

 

How come about the intake gear?
the intake value timing control solenoid value, does this create the "changeover" in here???

 

I was going to point out that it looked like a S2000 dyno. And then I saw it was.

The VQ35DE has varible valve timing on the intake side, and later added it to the exhaust side (revup and HR) the VHR has varible lift as well.