No one said it couldn't be done. It's just i'll advised without specific preparations which no one here would be willing to do anyway.

 

Who's to say it won't just bolt-on without issues?

 

All valid points, but this thread is in the All Motor section. And for all intents and purposes, for all motor, the complete VQ35 swap would probably be the best overall bet for instant success with minimal issues (convert to a cable TB instead of using the wireless crap if you want as well). The VQ35 is lighter, has more base HP/TQ, and is a reliable existing system (or maybe even swap in the 00-01 VQ30 instead of the 02+ VQ35). Building a specific hybrid for all motor purposes is much more difficult, most likely to be problematic unless you have the full capacity to an engine building/tuning/testing facility, and will cost more in the long and short run due to having to buy multiple engines...

Just my humble opinion.

 

It may just bolt on, but the issue is that now the quench area of the head extends outside of the cylinder diameter by a few millimeters. This may have a deleterious effect on detonation suppression that more than offsets the effect of lower compression.

 

There's no way you could run that setup (like your describing) for long. Think about what part would then be taking some of the detonation...

 

Yes, some modification might have to be done if there is a detonation problem. But we don't know that till somebody does it, and why not talk about it instead of saying it can't be done or it's just easier to do this or that instead? Maybe I'm just used to this kind of thinking, having been an engineer for 25 years.

 

I thought we were just discussing bolting stuff up and letting it fly? I know anything can be made to work with modifications...and this particular little project might work fine for a while as is. All I'm saying is that you can't expect to have the engine continue to run well over the life of the vehicle by just bolting up heads like this...

 

I'll agree to that. You make a good point. The best option if reliability and longevity is concerned is to use what Nissan has already engineered, tested and produced.

Still....., it's just fun to consider the possibilities is all.

 

Hell, if I was just building a motor to build a motor and stick in another Nissan platform, then hell yeah I'd experiment (with the motor SR20 was talking about...VQ23 crank and all). Throw it into an old 240Z or something like that (maybe even a 240)...

This thread...

http://forums.maxima.org/showthread.php?t=377327&page=1

...post #38

 

Sorry but I cant follow the post to well... anyhow, what is needed for the whole 3.5 swap. I know this has probably been answered already like in 10 post, but nothing has been clear to me... Exactly what will I need, a buddy told me its the 3.5 altima engine? This true? Ok if it is, then any mods I purchase for the engine when I swap it out, will be mods made for the 3.5 altima engine? What else will I need? Motor mounts?, ecu? sorry I'm the best knowledgable person about cars, so all info is helpful. Thanks

 

thank yo guys that are backing me up on my opinion of going the route of a complete 3.5 swap. i mean it is fun experiminting with different things but you cant tell how long it will last because those parts were not made for each other. it exactly the smae thing as people here are trying to do with using a VI IM from a 2k-2k1 max. people say it flows be***r than 3.5 IM but how will it work on a 3.5 eninge is the question?

but one thing i would like to experiment with is using a IM from a 350z. Only if i could find one cheap.

 

Well, experimenting is the only way to find out what works and what doesn't. This is the only way for us to become faster because it's not companies out there give a shyte about making parts for our cars to make things easier for us. We have very few people and small businesses will to do this for us but it's still not enough.

Don't knock the experimental stuff.

 

i am not knocking anything at all. i am all for experrimenting but again depending with what kind of things you experiment with.

For example, when people started to experiment with installing a VI from a 2k-2k1 maxima onto a 4th gen maxima, i had nothing against it because those 2 engines have the same displacement (3.0 liters), so it made sense to experiment with that. Now there is a thread on how to make a VI from 2k-2k1 maxima work on a vq35, it still experimenting but the 2k-2k1 VI was not desinged for a engine with a bigger displacement (3.5 liters) and people be saying that it will flow better but how can that be? the vq35 IM was desinged for the vq35 and now you are trying to take somehting from a 3.0 engine and make it work on a 3.5 and say it will work better? I dont think that the engineers are that dumb to desing a IM for the vq35 that will flow less air then the 3.0 IM. And same goes with the internals of the engine. how do you know how they will work together? I know you guys are going to start saying by experimenting but why mess around with something like the vq35 which by all means is superior to both the 4th gen and the 2k-2k1 engines. That is my opinion. but a Moderator told me to keep my opinion to myself because some people here on the org are getting mad.

 

Hey vasily did you get my PM?

 

Vasily, this is the original question that started the thread:

This is how you responded:

How is that helpful in the least? At best it says nothing useful and comes across as condescending.

 

vsamoylov,

I'm not sure how much bearing this has on your opinion, however do you know how many B17(1.7Liter) LS bottom-ends with B16A(16L) head motors Honda guys run for long periods with/without boost?

I don't see the displacement difference or miss-matching parts being a big deal, however the different bore sizes is a valid/real concern here.

 

Im baffled??????!! how do some people know for a fact the 3.5 IM flows better than the dek ?
I have measdured both side by side the dek is oval and 3.5 round but i would say that from the measures i took and from what i see the 3.5 head is NOT big enough for the dek lower port size that i have . I will have to open the 3.5 heads because width wise there lacking bad. the 3.5 intake ports look dinky compared to MY lower setup.

 

Chris,

Get some pics, because I'm baffled on what you're talking about.

studman has some 5.5gen VQ35 vs. 6th gen VQ35 LIM pictures on his website you might checkout:
http://maxima.theowensfamily.com/intake.asp

 

Also, here are some VQ30 vs. VQ35 teardown pics mostly from BigDogJonx:
http://www.poweredbynissan.com/images/VQ_Misc/

 

and what is you lower setup? kinda hard to undersatnd what you said above.

 

Very simple if you take a 3.5 lower gasket and put it on my dek lower it blocks alot of the dek flow.

 

What about a 2004 Maxima IM?

 

is it just me or the 3.0 head inlet looks bigger than the 3.5 head inlet

 

This seem like a slightly bias opinion for some reason...

 

the 3.0 ports are squished and oval and the 3.5 are more round. The 3.5 look a little bit bigger though.

 

And I actually try to be unbiased in discussions like this. I just have to go by what has been proven so far vs. what hasn't been proven.

 

SR have you done any VQ35 swaps besides your own yet, ie customer cars?

 

What do you mean "his own"? He already has a 2k2. He doesn't have to go through the pain in the @ss that is swapping engines.

Why do I not have the money for a 2k2 6sp?

 

because it will be worth it in the end. i jsut sent you more info on the swap. check your email

 

instead of emailing the info, why not just post it for everyone to see?

 

I am not posting anything until I know for a fact that everything works fine.

I don't have any pics right now but I am taking my sweet time...

 

He nuked an exhaust valve in his first engine with nitrous, so he did a swap in what appeared to be his own home garage.

 

Would you be better off using a 3.0 oil pan with the full 3.5? Looking at the 2k2 FSM, I dont see anywhere to mount the crank pos. sensor. onto the oil pan. (the one by the crankshaft pulley)

 

That's what Japmaxse used on his hybrid motor.

 

I chose full 3.5... But at this point I have to find a way around the fuel rail and TPS. Anyone have a writeup on how to convert the 3.5 rail to a return system? The throttle body i'm attempting to convert it to cable, but what about the TPS? Or should I just get the PF TB?


JClaw: What are you doing for these items?

 

I don't have to go through this. My swap is full, ECU/wiring - all of it from a 2002. Have fun.

 

You do have to convert the rail to a return style right?

 

I was referring the TB, sensors and all. I have not worked on the car since last week, where I put the VQ35 with the trans and headers in. Piece of cake compared to f*cking around with electronics. I have looked at the rail only briefly. Don't give me headaches before I start

Edit: Apparently, 2k2's have a regulator for this, saving me at least this headache, so I can concentrate on the ignition switch/immobilizer/ECU section. Thanks to Vasily for the info.

 

Just buy/find a 2000-2001 rail.

As for the TPS, PF TB or DEK TB will work.

 

why convert? 2k2 maxima and up use a fuel regulator for each fuel rail ( 2 regulators cause 2 fuel rails). 4th gen has a return line back to the gas tank. what i did was just plug up the return line cause it is useless cause the fuel regulators do all the work so there is no fuel left over so no point in a return line. and for the TB, just use the 4th gen or 5th gen just like tilley did if you plan not to do a complete swap