??00VI on a VQ35??

915Max · 09-09-2009, 10:46 PM

Okay... so a very reputable org member brought this up once, but didnt give much info.

So what I'm trying to find out is if this has been done!? Not sure if it was a sarcastic remark, or an actual project thats in the making. Not sure if there would be massive hp/tq gains, but just thought i'd ask.

Anyone!?!?

MOHFpro90 · 09-09-2009, 11:07 PM

I assume you're referring to nismology's comment.

Two problems...TB and LIM.

You could run the PF tb or something along those lines, but obviously somewhere down the line you're going to need an adapter plate. Though, I would think you could run the DEK TB, assuming you're swapped. Else, youd be stuck with the 3.5 TB and have to get an adapter plate made.

With the LIM, its a lot trickier. You have 3 options. The 3.5 LIM, 3.0 DE and 3.0 DEK LIMs. With either of the 3.0 LIM's youre going to have to port match the LIM's and heads to get them to flow decently. With the DE LIM, you'll have to redrill it, making the DEK LIM a much more approachable LIM to use. If you decided to use the 3.5 LIM, (not sure of the shape of the ports, not as familiar with the 3.5 as I should be) you'll have to do some work on the UIM and LIM to get the ports to align up and flow decent.

So, either way, LIM is gonna be the hardest part. If I were you, DEK LIM and fuel equipment, with a return less setup. Unless someone can share that the 3.5 LIM would be easier to use, I cant answer that for sure.

Oh yeah, and Im pretty sure there are a few more "issues" to work around, but those are what came to mind.

915Max · 09-09-2009, 11:14 PM

I know there would have to be some modification involved to achieve this. I just wonder if the DE-K upper manifold would bolt up to the 3.5 lower manifold.

I would assume that it would be best to use the 3.5 fuel system... arent the injectors larger on a 3.5 than a 3.0!?
I wish I could get my hands on a 00vi to get a visual of possible issues, but I'm not as fortunate....

MOHFpro90 · 09-09-2009, 11:46 PM

Ive got some pictures and such, what you need? dimensions?

From what I know, the 00VI will not bolt to the 3.5 LIM.

Edit: And yes, 3.5 injectors are larger, however you would need a tune regardless of what "route" you went while doing this, so you could tune for the smaller injectors. Or just get bigger 3.0 injectors.

Product_Of_Korea · 09-10-2009, 04:58 AM

the de-k injectors will flow more then the 3.5 injectors. I dont remember the exact numbers but Im pretty sure that the dek's flow more

Also i belive there has been only one or two people that have utilized the 00vi on the 3.5. I know krismax for sure.

The other option besides grinding the snatch out of your manifolds and what not is to use Heads off a Pathfinder.

But IIRC there will not be gains using the 00vi over the 3.5 upper. I belive some power is lost.

*ajcool2* · 09-10-2009, 09:49 AM

I think this was discussed in one of Nealoc's threads because he had the 3.0 DE IM on his 3.5.

915Max · 09-10-2009, 10:26 AM

Quote:

Originally Posted by ajcool2

I think this was discussed in one of Nealoc's threads because he had the 3.0 DE IM on his 3.5.

Any links to this!?
I'm looking for info on the DE-k... not the DE manifold.

**Nealoc187** · 09-10-2009, 11:20 AM

Quote:

Originally Posted by 915Max

Any links to this!?
I'm looking for info on the DE-k... not the DE manifold.

DE and DEK LIMs are the same as far as port shape goes, that's the point he's making.

You could make this work, but it would require either:

a) a lot of porting in order to use a 3.0 LIM on the 3.5 heads (which would do unknown things to their flow, could be good, could be bad).

or

b) an adaptor plate to make the 00vi upper match up with the 3.5L lower (which would need to be 3D machined to have the different port shapes morph to match each other, and then you'd need to figure out how to work the bolts because the bolts aren't even close to matching up either).

or

c) (and I believe this would work, but someone correct me if I'm wrong) pathfinder heads which have intake ports shaped the same as 3.0s (or utilization of 3.0 heads on a 3.5 which I don't feel is a good idea).

I bought an 00vi with the intention of doing option B, and when I finally realized how badly things were misaligned I said "to hell with this" and sold the 00VI. Wasn't worth the effort for me - I have the means to design and machine the adaptor plate at my buddy's house but I just decided it wasn't worth the effort.

MOHFpro90 · 09-10-2009, 11:31 AM

Holy crap dude... thats pretty far off.

There have been a few topics of the 3.0 heads on the 3.5, but it involved enlarging the diameter of the combustion chamber on the heads to clear the piston. And the lack of flow with the 3.0 heads is a downfall.

How do the PF heads flow compared to the 3.5DE?

IMO, seems like a lot of work, even though the 00VI may be regarded as one of the best UIM's made, the ammount of work to go in to get it on the 3.5 might just be absurd...

**Nealoc187** · 09-10-2009, 11:52 AM

**Nealoc187** · 09-10-2009, 12:03 PM

here's the thread that's from

VQ30 Maxima, VQ35 Pathfinder, VQ35 Maxima Cylinder Flow Data

**nismology** · 09-10-2009, 12:54 PM

Yea it was me that he originally contacted. I'm convinced that the 00VI more than makes up for the difference in head flow (which can be improved anyway) and will set out to prove it once I find a decent 5MT '01.

**nismology** · 09-10-2009, 12:57 PM

Quote:

Originally Posted by MOHFpro90

There have been a few topics of the 3.0 heads on the 3.5, but it involved enlarging the diameter of the combustion chamber on the heads to clear the piston. And the lack of flow with the 3.0 heads is a downfall.

Don't remember reading this. In any case, I highly doubt this is necessary since the squish clearance doesn't change regardless of the heads you are using as long as stock pistons and head gaskets are being used.

throttlehappy46 · 09-17-2009, 04:46 AM

No need to enlarge the combustion chamber volume on the VQ30 heads, if anything having larger bore pistons with a smaller bore head is an advantage!

VQ35 injectors flow more fuel but only when they have 3.5bar stock rail pressure and the DE-K is running its stock 3bar rail pressure. DE-K injectors would flow more fuel on a test bench when both are being fed 3bar and as such, DE-K injectors at 3.5bar would outflow VQ35 injectors on 3.5bar

MOHFpro90 · 09-17-2009, 11:41 AM

Quote:

Originally Posted by nismology

Don't remember reading this. In any case, I highly doubt this is necessary since the squish clearance doesn't change regardless of the heads you are using as long as stock pistons and head gaskets are being used.

Damn where did I read that? Maybe it was the thread where someone was trying to use the VK45 pistons in the 3.0 to get the higher CR.

Anyhow thanks for correcting me