aackshun

iTrader: (3)

My FSM diving says this is a no go because of the piston height.

Am I correct? Has any one done this?? Can't seem to find any results on the matter.

I don't have a 3.5 apart currently at work, but if I don't get any answers by the time I take apart the 3.0 I will be forced to dismantle a 3.5 core @ work.

Thanks.

Kevlo911

iTrader: (36)

you can on swap RODS and CRANK..

not pistons... the bore is different

WesCTR

iTrader: (2)

what would be the benefit of this? just curious. I don't know the difference in dimensions.

Quickywd01

iTrader: (16)

Look up hybrid threads...

Crusher103

iTrader: (10)

Thats what i was thinking. Might aswell just swap in a VQ35 after all the work is said and done.

ampire

iTrader: (12)

probably the thing most worth swapping is the 3.5 cams

aackshun

iTrader: (3)

You know what I mean

Meh looks like no good answer then.

TurboA32

iTrader: (36)

well people have put 3.0 heads on a 3.5 so i dont see the problem

Weimar Ben

iTrader: (5)

Are you serious? Just because you can put 3.0 heads onto a 3.5 bottom end doesn't mean that the parts in the bottom end are all compatable with each other.

Weimar Ben

iTrader: (5)

If you swapped in a 3.0L crank and rods with 3.5L pistons into a vq35 block you would have 3.2 or 3.3L, can't remember which. While this would be sweet for FI and a 8000rpm+ redline, I don't see the point for NA with a stock redline.

I don't think anyone's really done such a setup with the 00vi and a 8000-8500rpm redline. ITBs with such a setup would really SCREAM.

Of course, I think that HR pistons are a must if you're tearing down an engine-for performance, reliability, and oil consumption.

You could also build a stroker by using the 3.0L pistons in a VQ30 block with vq35 rods and crank. That's either 3.3 or 3.2L, can't remember which. But this doesn't really have any advantages over a normal VQ35.

Kevlo911

iTrader: (36)

Tilley build the high rev VQ32 (low rev is VQ33) combo

he broke his trans

but IIRC, he loved the VQ32

TurboA32

iTrader: (36)

the man is asking about piston height. i think he wants to know if the pistons will hit valves.

aackshun

iTrader: (3)

Or even reach deck height....

asand1

iTrader: (1)

I think its a moot point because the cylinders would be so thin after boring it would not run for long (if at all).

aackshun

iTrader: (3)

asand1

iTrader: (1)

I'm assuming the 3.5 is larger bore but Idk.

VQ30DE-K

Ok, so 3.5 is definitely has bigger bore and longer stroke than 3.0.
VQ30 Bore: 93mm, Stroke: 73.3mm
VQ35 Bore: 95.5mm, Stroke: 81.4mm (this info is from wiki, and I think its correct, because the numbers look similar to the book that once I checked, when I was rebuilding motor in my engines class. (not vq30/35, different motor)
In my opinion for N/A build is importance of high RPMs and lightweight internals (yet heavy duty). So as the Weimar Ben mentioned: using 3.5 pistons with 3.0 rods and crank on a 3.5 block would be very nice build.
It would be cool to see someone build it like that.
I think VQ30 rods and crank should be fine up to 8k. As you can see from the dimensions, 3.5 pistons only 2.5mm larger in diameter (not that much bigger than 3.0), and the stroke is 8.1mm longer than 3.0, stroke which makes the engine lazy, (cant rev high naturally, because of the too much distance traveled up and down, inertia prevents it).
Down side of using 3.0 rods and pistons is you going to loose some low-end torque, but I think its not a big deal, 3.0's have enough torque anyway (in my opinion). Especially if using a 5 speed which has 3.81:1 diff, and gear ratios are fairly high, high RPM+high gear ratios = best acceleration, mid-top speed and better powerband over all.