Question about the VQ engine
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Question about the VQ engine
Hey everyone,
My 2K2 Maxima SE 6-speed is my first Nissan ever. I have loved it since day one (about 9 months ago). I have loved the power of the engine. It's so sweet. Well, my roommate is a big Acura guy. He has a 2001 3.2 TL. I let him drive my Maxima the other day, and he brought up something that I really didn't notice up until this point, but made me curious. When you floor it in 2nd gear, the engine gets a HUGE burst of power at about 4,000 RPMs. Does the VQ engine have something similar to VTEC? I didn't think it did, but my roomie asked me because of that huge power increase.
Thanks!
===============
2K2 Maxima SE 6-Speed
Everything but NAV
My 2K2 Maxima SE 6-speed is my first Nissan ever. I have loved it since day one (about 9 months ago). I have loved the power of the engine. It's so sweet. Well, my roommate is a big Acura guy. He has a 2001 3.2 TL. I let him drive my Maxima the other day, and he brought up something that I really didn't notice up until this point, but made me curious. When you floor it in 2nd gear, the engine gets a HUGE burst of power at about 4,000 RPMs. Does the VQ engine have something similar to VTEC? I didn't think it did, but my roomie asked me because of that huge power increase.
Thanks!
===============
2K2 Maxima SE 6-Speed
Everything but NAV
Senior Member
Joined: Apr 2001
Posts: 4,968
Re: Question about the VQ engine
Originally posted by MrCollegeGuy
Hey everyone,
My 2K2 Maxima SE 6-speed is my first Nissan ever. I have loved it since day one (about 9 months ago). I have loved the power of the engine. It's so sweet. Well, my roommate is a big Acura guy. He has a 2001 3.2 TL. I let him drive my Maxima the other day, and he brought up something that I really didn't notice up until this point, but made me curious. When you floor it in 2nd gear, the engine gets a HUGE burst of power at about 4,000 RPMs. Does the VQ engine have something similar to VTEC? I didn't think it did, but my roomie asked me because of that huge power increase.
Thanks!
===============
2K2 Maxima SE 6-Speed
Everything but NAV
Hey everyone,
My 2K2 Maxima SE 6-speed is my first Nissan ever. I have loved it since day one (about 9 months ago). I have loved the power of the engine. It's so sweet. Well, my roommate is a big Acura guy. He has a 2001 3.2 TL. I let him drive my Maxima the other day, and he brought up something that I really didn't notice up until this point, but made me curious. When you floor it in 2nd gear, the engine gets a HUGE burst of power at about 4,000 RPMs. Does the VQ engine have something similar to VTEC? I didn't think it did, but my roomie asked me because of that huge power increase.
Thanks!
===============
2K2 Maxima SE 6-Speed
Everything but NAV
Banned
Joined: Nov 2002
Posts: 1,216
Re: Re: Question about the VQ engine
Originally posted by jjs
Not actually a VTEC arrangement, more of an intake flow change. There might be some other responses more technically detailed, but if I recall correctly, that is what causes that 'surge'.
Not actually a VTEC arrangement, more of an intake flow change. There might be some other responses more technically detailed, but if I recall correctly, that is what causes that 'surge'.
Also, something else that's kind of cool to take a look at...On a cold day, when you're warming up your car, take a look at the exhaust pipe(s). You'll see that the exhaust smoke is only coming out of one of the pipes--the other one remains closed. However, under WOT, the 2nd pipe opens up, and the exhaust flows much freely.
Senior Member
Joined: Apr 2002
Posts: 284
hmmm...
Do you guys even bother to read through the vehicle specific brochures when look for cars let alone buy them.... these material usually shows all the neato features that the cars have.... The variable intake and exhausts are some of the feature points in the max brochure... having the car makes it all the more interesting to see or feel these features work... well, besides the advertised 255 ponies....
that reminds me, i gotta go pickup an infiniti g35 brochure booklet.... i got one for is300, wrx, and tl/cl's...too
that reminds me, i gotta go pickup an infiniti g35 brochure booklet.... i got one for is300, wrx, and tl/cl's...too
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Re: hmmm...
Originally posted by koostermax
Do you guys even bother to read through the vehicle specific brochures when look for cars let alone buy them.... these material usually shows all the neato features that the cars have.... The variable intake and exhausts are some of the feature points in the max brochure... having the car makes it all the more interesting to see or feel these features work... well, besides the advertised 255 ponies....
that reminds me, i gotta go pickup an infiniti g35 brochure booklet.... i got one for is300, wrx, and tl/cl's...too
Do you guys even bother to read through the vehicle specific brochures when look for cars let alone buy them.... these material usually shows all the neato features that the cars have.... The variable intake and exhausts are some of the feature points in the max brochure... having the car makes it all the more interesting to see or feel these features work... well, besides the advertised 255 ponies....
that reminds me, i gotta go pickup an infiniti g35 brochure booklet.... i got one for is300, wrx, and tl/cl's...too
-vq
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Joined: Nov 2002
Posts: 1,216
Re: hmmm...
Originally posted by koostermax
Do you guys even bother to read through the vehicle specific brochures when look for cars let alone buy them.... these material usually shows all the neato features that the cars have.... The variable intake and exhausts are some of the feature points in the max brochure... having the car makes it all the more interesting to see or feel these features work... well, besides the advertised 255 ponies....
that reminds me, i gotta go pickup an infiniti g35 brochure booklet.... i got one for is300, wrx, and tl/cl's...too
Do you guys even bother to read through the vehicle specific brochures when look for cars let alone buy them.... these material usually shows all the neato features that the cars have.... The variable intake and exhausts are some of the feature points in the max brochure... having the car makes it all the more interesting to see or feel these features work... well, besides the advertised 255 ponies....
that reminds me, i gotta go pickup an infiniti g35 brochure booklet.... i got one for is300, wrx, and tl/cl's...too
Thread Starter
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Joined: Sep 2002
Posts: 617
Re: Re: hmmm...
Originally posted by vito1281
I read mine, just wasn't exactly sure what the "official" name of it was--that's all! No need to sound condescending.
I read mine, just wasn't exactly sure what the "official" name of it was--that's all! No need to sound condescending.
Re: hmmm...
Originally posted by koostermax
Do you guys even bother to read through the vehicle specific brochures when look for cars let alone buy them.... these material usually shows all the neato features that the cars have.... The variable intake and exhausts are some of the feature points in the max brochure... having the car makes it all the more interesting to see or feel these features work... well, besides the advertised 255 ponies....
that reminds me, i gotta go pickup an infiniti g35 brochure booklet.... i got one for is300, wrx, and tl/cl's...too
Do you guys even bother to read through the vehicle specific brochures when look for cars let alone buy them.... these material usually shows all the neato features that the cars have.... The variable intake and exhausts are some of the feature points in the max brochure... having the car makes it all the more interesting to see or feel these features work... well, besides the advertised 255 ponies....
that reminds me, i gotta go pickup an infiniti g35 brochure booklet.... i got one for is300, wrx, and tl/cl's...too
It's like getting mods for free!
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Donating Maxima.org Member
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Re: Re: hmmm...
Originally posted by spta97
Actually, no. I skim the glossy broshure and drive the car. I love finding out new features that I didn't know it had! After I found everything that I could think of, then I read the manual for other things that I didn't find on my own.
It's like getting mods for free!
Actually, no. I skim the glossy broshure and drive the car. I love finding out new features that I didn't know it had! After I found everything that I could think of, then I read the manual for other things that I didn't find on my own.
It's like getting mods for free!
Senior Member
Joined: Nov 2001
Posts: 355
Yeah, I've noticed the surge at around 4k RPM as well. Actually, I think our engines do have something similar to VTEC. I'm not a mechanic though, nor do I play one.
Besides the variable intake that's mentioned, if you look at the Maxima info on nissanusa.com, there's a mention of
"Variable Timing This lesson in breathing technique comes courtesy of Maxima's Continuously Variable Valve Timing Control System. It makes constant, precise adjustments to the opening and closing of the valves based on rpm and throttle position. Which ultimately delivers optimum power and emissions in all cases, all the time."
Sounds quite similar to VTEC. If you wanna read on how VTEC works, see http://www.howstuffworks.com/question229.htm.
Besides the variable intake that's mentioned, if you look at the Maxima info on nissanusa.com, there's a mention of
"Variable Timing This lesson in breathing technique comes courtesy of Maxima's Continuously Variable Valve Timing Control System. It makes constant, precise adjustments to the opening and closing of the valves based on rpm and throttle position. Which ultimately delivers optimum power and emissions in all cases, all the time."
Sounds quite similar to VTEC. If you wanna read on how VTEC works, see http://www.howstuffworks.com/question229.htm.
Thread Starter
Donating Maxima.org Member
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Posts: 617
Originally posted by irvine78
bottom line...as the engine revs go up, the intake will switch over to shorter intake runner(hence the variable intake) to speed up the air speed...more power...happier drivers.
bottom line...as the engine revs go up, the intake will switch over to shorter intake runner(hence the variable intake) to speed up the air speed...more power...happier drivers.
Dyno plot says I have the most area under the Administrator curve
Joined: Jul 2001
Posts: 7,064
There's a little dip in the torque curve right at 3800rpm where the variable intake opens up the secondary runners. So at 4000rpm you'll be feeling a bit of a surge.
It's *NOT* VTEC though
The VQ35DE also has continuously variable valve timing (CVTCS) on the intake valves, but this is stepless, and doesn't vary lift. So you won't feel a kick from it like you would on a typical Honda VTEC.
It's *NOT* VTEC though
The VQ35DE also has continuously variable valve timing (CVTCS) on the intake valves, but this is stepless, and doesn't vary lift. So you won't feel a kick from it like you would on a typical Honda VTEC.
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Posts: 238
i had been wondering this whole time why theres that lil surge after a certain rpm. i was gonna ask you yesterday steve, but i guess you already answered it for me. hehe. i forgot that we had the variable intake. i guess VTEC still has the surge too. but when i looked on your graph (torque graph). the toyota one seemed to kick in a lil late, but has a better boost than the acura and maxima?
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