So we all know that in about a month the new Frontier, Pathfinder, and Xterra will be coming out, all powered by the new VQ40DE. What's known is that it's designed to produce about the same HP as the VQ35, but produce a whole lot more torque. We here at Maxima.org have done all kinds of stuff with the VQ, including making a VQ33 stroker, as well as transplanting the VQ35 block/internals into a 4th gen and everything else.

What I want to ask all of you is, what can we do with the VQ40? What combinations do you think we could come up with? It's already known that the VQ40 is merely a stroked version of the VQ35 (see Nissan Engine List). Could we potentially use parts from a VQ40 to create an even larger-displacement VQ for our cars, or would that be serious overkill? I'm not saying I'm doing it, I just have thoughts of my own and would like to hear thoughts from you guys. Post away

 

There is already a stroker kit for the VQ35

 

Aside from the VQ40 shortblock there isn't anything on it that we want for a NA setup. The 92mm crankshaft isn't going to fit in the VQ35 block without custom connecting rods and even perhaps some die grinding. And even if it is made to fit the engine would be a very short lived one due to the extremely poor rod ratio it would have. The VQ40 block has been made taller to accomodate for this and it may not even fit in a Maxima with the OE hood.
The VQ40 pistons and or cylinder heads may be used as a lower cost option to lower the compression of a VQ35 to make it more ideal for FI.
I suspect that the VQ40 cams are either equal to the OE VQ35 cams or less aggressive because of it's truck use design.
So untill Nissan finally releases the '05 service manuals there isn't much more we can do than speculate. Let us all hope that we like the remainder of the data.

 

I'd say that would have ALOT more potential for VQ35's... 5.5 Gens

 

I don't think it's fair to call that just a stroker kit. It's more of a complete shortblock kit with brand new bigger bore cylinder liners. And at it's $7800 price tag I don't see anyone standing in line to buy them. A VQ40 shortblock will only cost about <=$2000 new from a dealer at wholesale pricing. That is about what you'll pay for a A34 (VQ35) shortblock which is made at the Decherd engine plant in Tennessee which is where the VQ40 is also made. A A33B VQ35 will cost you about $4800 because it is imported. So the viability of the VQ40 is already supported from economics alone.

 

I would agree good for the 5th gens but as far as the 4th gens we got the best from nissan so far for here on out its going to be all custom stuff and people figuring out more cross compatable parts. And I think we should look in to backwards compatibility with older models. Even though we have already started.

Bruce

 

Good, this is the kind of stuff I wanted to hear. SR20DEN, I never even thought about using the pistons alone to lower the compression. Do you happen to know yet what the compression is going to be on the VQ40? (You haven't updated the list in awhile, and you didn't tell me about it when I made the updated version I sent you)

 

I told you what I knew as soon as I found the information. You're the one who added the existing VQ40 info.

 

I meant the compression ratio. You didn't tell me it when you sent the info, so I assume you didn't know it at the time.

 

If theres a will there is a way.

 

Im more interested in the fact that nissan did something exciting . The 3.5 in the g35 was revised the internals made stronger and if the 3.5 was not meant to rev its starting to now. The g35 coupe manual has a 7000rpm redline ,this is good news for me because i plan on swaping the 3.5 bottom end either some fwd,s will get the upgrades or ill get ahold of the rwd internals . This engine looks like it could go 7500-7600 rpm now.

 

VQ40DETT sounds good

 

I haven't heard that about the 7k redline but the current VQ35 can do that all day. If they made anything stronger it would most likely be the rod bolts. The main thing I want to see is if the '05 cams are more agressive than the current ones.

 

ummm...is this what yall are talking about?

http://www.vqpower.com/v2/article105.html

 

Yeah i know it will rev to 7000rpm all day long but im interested in 7500 rpm + . Here is a quote from nissan


"The G35 Coupe 6MT model receives an additional 18-plus horsepower and a red line increase to 7,000 rpm compared to the automatic transmission-equipped G35 coupes’ standard 280 horsepower and 6,600 rev limit, bringing its power to 298-horsepower. The extra power comes from the addition of electronic exhaust valve timing and NUMEROUS structural improvements to the engine block. Torque is rated at 270 lb-ft for the G35 Coupe and 260 lb-ft for the G35 Coupe 6MT."

 

Now we need to find out if it has dual VTC or a single VTC that changes both cams at the same time.

And as I stated before, simply upgrading the rod bolts makes a stock VQ35 good for 7500rpm.

 

No. We're talking about the VQ40DE that's coming from Nissan next month in the new Frontier, Pathfinder, and Xterra. Did you even read my first post?

 

Hey I just pulled a 4.0l out of a new xterra and well i was thinging about the swap as well but i did some checking.. and well the bell housings are different un like the 3.5l and the engine is physically bigger so a direct short block swap would not work.. with out a adpter plate or something like that.. to make it work.. i am sure there would be other issues.. and on another note.. the 3.5 7000 rpm engine has different vtech solionds for both exhaust and intake.. so there you go.. I think i am gonna stick with the 3.5l swap personsally. :

 

2 things. 1st, if you bump up another thread over a year old, your going to be taking a vacation from the .Org. Ah, and you just got here. 2nd, Nissan does not use 'vtech', please don't combine the two in a sentance. Mmkk

 

There is a reason no one has posted in this thread for over a year, so DO NOT bring it up again. Thanks, mtr.

 

Would you be worried about often reving a stock (no rod bolts) VQ35 to 6800-7000?