VQ30DE swap?

[NismoDan]

I tried searching but couldnt come up with much....

The only reason I've been thinking about a VQ30DE(K) swap is that #1 they're way cheap to source, and #2 the Nissan JGTC cars use them (VQ30DETT in the GT 500 class, VQ30DE in the GT 300 class).

Any thoughts?

[goodjuan]

it'd be sweet if you could do it. 222 NA hp would be fun

Are you talking about a jdm rwd engine?

or using the fwd US one, and doing a bellhousing swaparino?

[NismoDan]

I read somewhere that a Frontier tranny could be used....
still have to research that.

[OptionZero]

Isn't the reason the JGTC cars use the 3.0 version and not the 3.5 because of engine regulations for that particular class? I know the NSX's use 3.5 versions of the C-series engine (normally 3.2 in street NSX's)...but they are n/a.

Or is the use of the smaller engine simply to make for easier turbo setup? The future GT-R is rumored to have a VQ32DETT and not a 3.5 either...

[NismoDan]

I've heard that the VQ35's are a little bit rougher than the VQ30's...but that cant be the reason they use them in the GT cars.
I want to go for a VQ30 because theyre way cheap to find!

[Doriftomodachi]

I've heard that the VQ35's are a little bit rougher than the VQ30's...but that cant be the reason they use them in the GT cars.
I want to go for a VQ30 because theyre way cheap to find!

I want to be sure that I understand what you are posting. z32's came with the vG30de and the z32tt's came with the vG30dett. JGTC cars come with vQ blocks. IIRC vQ30's are jdm engines so how are they easy to source in the states?

[wootwoot]

^^^^^ thats what I was thinking and the VG series engines use an iron block and are pretty dang heavy and underpowered in N/A form stock

[NismoDan]

VQ30DE = A32 Maxima
VQ30DEK = A33 Maxima
(I think it's "A", but the numbers are right)

[justinhustle]

the vq30de is in the i30/maxima

the vq35de is in the pathfinder and the new altima/maxima 3.5's

[NismoDan]

as for JDM, VQ30DET = Cedric/Gloria

The only problem with these is that, even though theyre all FR (more than can be said for the Maxima VQ's), theyre also ALL automatics.
Still need to figure out tranny options, estimated cost, and amount of fabrication needed to do this.

[Doriftomodachi]

VQ30DE = A32 Maxima
VQ30DEK = A33 Maxima
(I think it's "A", but the numbers are right)

IIRC the FF platform VQ's are different from the FR VQ's am I correct?

[NismoDan]

IIRC the FF platform VQ's are different from the FR VQ's am I correct?

I'm not 100% sure on that, to either side.
I'm trying to source a JDM VQ30DET that's RWD anyway.

[OptionZero]

bah, in 2-3 years there will be more crashed 350Z's and G35's, along with fairlady's and 350GT's for you to scrounge...just wait! no tranny customizing necessary...

So you need a VQ30DET from Japan with a VQ35DET tranny from a 350Z or G35....anyone know if that will work?

I'm still waiting for a nice 2.7L RWD version in a kit easily swappable into an S-chassis...=P

[NismoDan]

bah, in 2-3 years there will be more crashed 350Z's and G35's, along with fairlady's and 350GT's for you to scrounge...just wait! no tranny customizing necessary...


That's EXACTLY what I was thinking a few weeks ago...
The only thing is, I've heard that the VQ35DE is actually really hard to squeeze a few more hp out of. Granted it starts with a nice, healthy hp rating anyway, but I've heard that even getting 300 hp out of them is kind of tough.

Now JDM/EDM (? - European/British Market) VQ30DET's start with 270 ps, a few down from their 3.5 liter brethren, but would it not be easier to start tuning an engine that came with a single-turbo than an N/A one?

(VQ30DE weighs less, too :D)

Some newly discovered stuff:
Apparently VQ35's don't take too kindly to boost, thanks to (among other thigns) extreme lightening. Apparently you can get 450-500whp with the stock rods, but thats with REALLY CAREFUL tuning, as people have seen their rods fail at lower hp levels using medicore tuning.
Additionally, the VQ35's take really advanced timing, so you have to retard the timing quite a bit to prevent detonation.

How about getting a VQ35 crank and rods...VQ33!!!

[TurDz]

I'm a previous long time maxima owner. The VQ (30) is an awesome engine. Sooo smooth. Even with an intake and exhuast it sounds very smooth and nice, engine response is insane, torque feels constant from 2500rpm to 5500rpm (205ft-lb). I wish I could have the RWD version in my 240...

[MakotoS13]

stuff:

Z32 motors are insanely heavy

you'd get more power out of a lighter ford small block 302 AND it'd be cake to fix it.

i'm playing with the idea of putting a 302 in my car since its similar in weight to the KA. if it'll clear the firewall and tranny tunnel...

[justinhustle]

i have a super charged 4th gen maxima se-l

i fucking love it, if it was fr :(

[goodjuan]

stuff:

Z32 motors are insanely heavy

you'd get more power out of a lighter ford small block 302 AND it'd be cake to fix it.

i'm playing with the idea of putting a 302 in my car since its similar in weight to the KA. if it'll clear the firewall and tranny tunnel...

what does the z32's VG have to do with this thread?

[OptionZero]

No wonder most of the aftermarket kits, including the Greddy TT kit seem to top out at 450 crank HP. Fragile engine...light....but fragile?

If teh new GTR is going to sport 400-450HP stock to deal with the Carrera and/or Z06, I wonder how they're going to do it while maintaining the tunability and potential characteristic of the GT-R badget.

The RB26DETT wasn't super special in stock form, but it was tough as a mofo and you could boost the hell out of it easily. The reverse seems to be true of the VQ35DE...lovely engine stock and low level modification, but not as much potential.

Maybe thats why again, we're hearing about a VQ32DETT

[TurDz]

Remember, it's not all about peak horsepower. One of the strengths of the VQ is its constant torque curve. On the track, engine response (having power/torque within a broad rpm range) is what its all about.

btw...the thread starter on this thread on maxima.org:

http://forums.maxima.org/showthread.php?t=334712

he was a pioneer in achieving high hp #s for stock interals on a vq30de.

and if you check...550-600fwhp is the consensus...

[98sr20ve]

Many engine manufactures are realizing that the overbuilding of engines is costing them HP and Fuel Economy. So they use lighter everything that works well at the stockish HP level the engine is designed for but not at higher HP level. I got to look at a VQ35DE out of a Murano and the rods, piston are thin and very light. Not boost friendly at all. At 3.5 the block is thin between pistons and its a open deck. So going down some on displacement makes sence for boost. That and some good rods and pistons would yield plenty of HP at the expense of $$$$.

[wootwoot]

Many engine manufactures are realizing that the overbuilding of engines is costing them HP and Fuel Economy. So they use lighter everything that works well at the stockish HP level the engine is designed for but not at higher HP level. I got to look at a VQ35DE out of a Murano and the rods, piston are thin and very light. Not boost friendly at all. At 3.5 the block is thin between pistons and its a open deck. So going down some on displacement makes sence for boost. That and some good rods and pistons would yield plenty of HP at the expense of $$$$.


It also has to deal with the goals of the engine. A naturally aspirated engine does not need to be built heavily, so why the heck would they?

[OptionZero]

so aftermarket people can get 900hp out of it!!!!

[90RS13]

It also has to deal with the goals of the engine. A naturally aspirated engine does not need to be built heavily, so why the heck would they?

Sometimes, it saves time also. Look at the SRT-4. Even if you hate them, if you look at the engine internals and what-not, it's built very strong. The reason for this is that Manufacturers take alot of time designing an engine to make the engine as cheap as possible. They usually spend alot of time, seeing what they can get away with, before they make the final design. With the SRT-4 dodge wanted to release as soon as possible, so they skipped most of that. They overbuilt the engine on purpose so they wouldn't have to redesign any. Hence, they are very strong. I've seen multiple SRT-4's with stock blocks and over 500 hp. Anywho, point is sometimes they overbuild to save time. And like optionzero said sometimes especially for a popular enthusiast car, they will overbuild so people will buy, and build them up, and spread a reputation of a good engine.

-matt

[brainfood]

So does the rwd vq35 6speed bolt to the vq30 or vq35 fwd engines? I want to do a vq35 or vq30 swap n/a in my s14 I want a nice broad torque curve that you get from an n/a motor and I am not looking for insane hp even stock 350z numbers would be nice but with cams/header/ecu tuning it would be def. a very nice setup in an s-chassis car and best of all smog legal for cali guys as long as all the original smog equip is kept. So please more info on this swap I know someone knows if the fwd and rwd blocks are interchangable.

[ThatGuy]

Last post: 02-14-2005

Your post: 01-22-2006

It took you 11 months to come up with a question?

The secret to any tranny swap is the Bell Housing. I'm fairly certain this has been discussed before as the VG30/VQ35 swap has been debated at lengths.

[brainfood]

Last post: 02-14-2005

Your post: 01-22-2006

It took you 11 months to come up with a question?

The secret to any tranny swap is the Bell Housing. I'm fairly certain this has been discussed before as the VG30/VQ35 swap has been debated at lengths.

Yeah I know the date differences I was just searching for info on it and figured I would dig up the latest thread. Still doesnt change my question searched here and google still looking for someone with experience in the matter

[brainfood]

found it finally
http://forums.freshalloy.com/ubbthreads/showflat.php?Cat=&Board=UBB9&Number=67952681&page=0&view=collapsed&sb=5&o=&fpart=1

[drift freaq]

ok I will attempt to answer your question. There is a person on FA who put a Maxima VQ in his s14 I am pretty sure he bolted on a 6 speed tranny. Seeing as they are both V6's of the same engine family, one would surmise that you could bolt on a manual trans clutch and flywheel. Then bolt up a manual tranny. Especially since the engine was available in Japan in RWD.
Next time try to search and google it, before digging up an old thread.
Oh ya if you want a VQ 6 speed I have one I can sell for $500 :D it has less than 6k on it.

[brainfood]

Yeah I posted that fresh alloy thread when I found it. Looks like maxima vq30 with 350z 6sp and oil pan/starter. I am still doing some research it is a big project and I need the car running right now so no dice probably wont happen for some months. Thanks for the info though.