5th Generation Maxima (2000-2003) Learn more about the 5th Generation Maxima, including the VQ30DE-K and VQ35DE engines.

Variable intake.

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Old Mar 22, 2003 | 06:58 AM
  #1  
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Variable intake.

Ok guys, I would kindly like some info:
I was unable to search so bear with me . Please clarify if the 2000-2001 SE Max has Variable intake or not? I am aware that the 2003 has it . I am a 4th Gen guy so , no flaming please .
Thank you all for your time.
Old Mar 22, 2003 | 08:17 AM
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Re: Variable intake.

i need this info as soon as possible .
Thank you.
Old Mar 22, 2003 | 08:19 AM
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Yes, we have a variable intake at 5500+ RPMS.
Old Mar 22, 2003 | 08:22 AM
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Originally posted by asu174
Yes, we have a variable intake at 5500+ RPMS.
i thought it started around 4000rpm...judging by my dyno it seems like it...not sure though.

-vq
Old Mar 22, 2003 | 08:28 AM
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Originally posted by VQMAN


i thought it started around 4000rpm...judging by my dyno it seems like it...not sure though.

-vq
It's higher on 3.0Ls....almost useless because of the rev limiter.
Old Mar 22, 2003 | 08:58 AM
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vqman
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Originally posted by asu174


It's higher on 3.0Ls....almost useless because of the rev limiter.
my bad, I wasn't even thinking about 3.0's....should have read the post. I just read the subject and your post...
Old Mar 22, 2003 | 10:31 AM
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Anyone though of making them open up sooner? My taurus has butterfly valves in the lower intake which open at 3500 rpm.
Old Mar 22, 2003 | 11:10 AM
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Originally posted by unrealii
Anyone though of making them open up sooner? My taurus has butterfly valves in the lower intake which open at 3500 rpm.
ECU would have to be fudged with....not possible yet.
Old Mar 22, 2003 | 01:47 PM
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Originally posted by asu174


ECU would have to be fudged with....not possible yet.
Even if it was, it just gonna cause a loss in torque in the midrpms anyway. Its not really needed til over 5000rpms, in the 3.0's anyway.
Old Mar 22, 2003 | 01:55 PM
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My VI kicks in at exactly 5000 RPMs.
It's extremely noticeable.
I wish I could extend my rev limiter to have my next gear fall closer 5000 instead of like 4000-4500.
I remember someone posting ideal shift points from a program.
I think (don't quote me on the numbers, this is only from memory) that 1st would be 7600, 2nd 7200, 3rd 6800, 4th 6500
(Or something like that).
This is for a 2000/2001 by the way.
Old Mar 22, 2003 | 05:15 PM
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Originally posted by HitManSE


Even if it was, it just gonna cause a loss in torque in the midrpms anyway. Its not really needed til over 5000rpms, in the 3.0's anyway.
I agree you only need it in the higher rpms. I have a 2k2 and I tied the valve next to the intake manifold so that it was fully open. I lost all low end torque and it didn't sound nearly as good either.
Old Mar 22, 2003 | 05:26 PM
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2k-2k1's engage around 5,200rpms. If you go any lower, there is a loss of mid-range TQ. Our 6,550rpm redline and 6,600rpm rev limit doesn't allow us to utilize the top-end we have. The power keeps pulling even at redline.

The engagment point is very noticable with an aftermarket intake. The pitch and sound of the intake goes from growly/bassy into a clear high pitch snarl If it doesn't do this and the sound gets louder and bassier as you approach redline, your VI isn't working.
Old Mar 22, 2003 | 05:31 PM
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Well if the VI change over is detected by a change in the pitch of how the intake screams, them mine opens up at 4200rpm. From like 2800-4000 it just sound evil (stillen/franken) but a little past 4K rpms the tone totally changes and it just screams to redline. I know it opens after 5K but my car is weird like that.
Old Mar 22, 2003 | 08:43 PM
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Originally posted by HitManSE
Well if the VI change over is detected by a change in the pitch of how the intake screams, them mine opens up at 4200rpm. From like 2800-4000 it just sound evil (stillen/franken) but a little past 4K rpms the tone totally changes and it just screams to redline. I know it opens after 5K but my car is weird like that.
Just dyno your car and you'll see on paper exactly where it kicks in
Old Mar 22, 2003 | 09:03 PM
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3.5L VQ's appear to kick in ~4000 RPM. It is definitely noticable in both sound and feel...
Old Mar 22, 2003 | 10:39 PM
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Thanks to all that have replied. I highly appreciate your prompt help and informative feed back. I will now retire , to my opponent with this good news.
Thanks again.
Old Mar 22, 2003 | 11:25 PM
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Originally posted by Quicksilver
3.5L VQ's appear to kick in ~4000 RPM. It is definitely noticable in both sound and feel...
So not only does the 3.5L have more torque but their VI kicks in earlier as well??? wtf...that's so unfair!

Sigh...

Oh well, I'm selling my Max anyway.
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