I am trying to find out if there in any interchangable parts between our Vq35 and the vq 40...Im trying to piece together a "cheap" stroker kit...Is everything a direct swap (Crank rods pistons) or will there need to be modifications done to the block...Thanks John...

 

Definitely let us know if you find out anything. It is my understanding the VQ40DE just has a longer stroke.

 

Now I'm all fired up about this question

The VQ40DE is a VQ35DE with a longer stroke. The stroke difference is 92.0mm vs 81.4mm, respectively. The bore remains the same at 95.5mm.

The question I have now is, are the rods weaksauce like the VQ35DE?

 

I was talking with AJ from Performance Factory a few months ago... He said to keep my eyes open for Titan swaps as they will become more common...

 

Well I did find out that the deck was raised on the 4.0 block...I also read the rods were thicker than the vq35 rods...Can anyone confirm this...I would put my car up for a donor if someone would like to sponsor this otherwise it will take some time but I will give it a go myself....For Example I used to own a honda S2000 F20C engine...You can make a stroker kit out of a K24 crack and H22 rods...With that in mind would I be able to use the 3.5L Pistons and rods with the 4.0 crank...

I for one would not be interested in a V8 swap because of the weight gain involved and lack of fitting parts...Also if Im not mistaken...Doesnt the titan only come in Automatic...?

 

Depending on your year, you wouldn't need to swap the internals. They are the same engine/heads except for crank/rods/pistons (not even sure about the rods/pistons). I would just start with the VQ40DE and go that route. The ECU harness should plug right in if you have a non-RevUp. Although switching out the internals would probably be the best route. The cams are definitely going to be different. Unless you go with some JWT's or someone elses.

I am not interested in a V8 swap either, unless it's a TT LS2

 

hmmmm..... i think i am looking at a VK56 sitting here

 

if deck height is different, I don't see how it would work

 

This is what I was waiting to hear

 

Well here is the thing...Again referring to my 2.4L S2000 all Honda stroker kit...If The 4.0L crank is a bolt in replacement...Maybe I could use VQ35 pistons with custom connecting rods or rods from another VQ Series Motor...Maybe it wont be a true 4.0L because of the rods but even if it is a 3.8 or 3.9 It would still be nice to have the extra displacement for an all motor build up...Also maybe taking the 4.0L Exhaust cams will give some added HP/TQ...I am looking for anyone with knowledge on both of these motors to shed some light on what parts are usable to enhance the VQ35...A 4.0 swap is not an option because the mounting point are different and the transmission wont bolt up...Plus the cost of a new motor and a custom swap probably be over 5K alone...I would rather buy a used Vortech and make power...If I can gain some displacement and some nice HP using a Hybrid motor for around 2,500 or 3,000 I would do that and then Vortech it on top of that...With the Hybrid 4.0L and a Utec with some tunning...One could probably see 350-400RWHP NA...I know TVR does it with a 4.0L straight 6... Also keep in mind...If every thing is a bolt in replacement...One could also use after market Rods and Pistions so you could make more power and still have a Very Very Strong Motor...

 

or you could just buy big enough pistons, get yourself to a 3.8 liter and use one of the many off the shelf forged pistons and rods instead of reinventing the wheel

the 4.0 motor I know nothing about so can't help you there in terms of its cam...I would imagine that the duration is so low as well as lift, it would not be well suited for this application at all

 

Lol...Z1 If I can do that by all means point me into the right direction...What pistons can I buy to make my Z a 3.8L

 

the 4.0L crank is not a drop in deal!

I have heard the VQ40 really isn't even in the same family as the VQ35, it closer to the VK family....which makes me beleive that bore spacing is different. If the bore spacing is different, you can forget any idea of using that crank.

 

we can easily supply you pistons - it's a fairly common thing in the VQ world

 

I just hope its not a stock VK swap though. Those engines have incredible potential, but still fairly limited aftermarket support. Given the design of the block, I don't see why it the engine couldn't be built to rev to 7k+ rpm while still making power. Done correctly, I think you could see at least 450 whp NA, but it wouldn't be a cheap build.

 

This was tried/talked about before. The crank can be made to fit and I think the pistons are the same or similar, but the rods are WAY too long. The Pistons would be inside the heads. You would need custom rods and probably some machining on the crank.

http://forums.maxima.org/showthread....t=stroker+vq40
Not much on the results, but some talk on the specs and problems.

The HR using a VQ40 crank might be another story.