Power Limitations on Internally Stock VH45DE

Discuss topics related to the VH41DE, VH45DE, VK45DE, and VK56DE engines.
carfrk666
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[QUOTE=MeanGreenS13]glad to hear all of this.

now who want's to fund my project? damn this economy... cannot wait to get up north and find some real work!

if you find work then let me know cause from what i see there isnt any up here


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MeanGreenS13
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your in the wrong part of the country lol you need to be a little further east. Massachusetts, in the county i'm from alone has over 2200 jobs listed on craigslist. that doesnt include local listings in papers and monster.com etc

XJared
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I haven't checked to see if it would plug it, I just wouldn't be surprised if it did since Nissan seems to keep things the same over the years. Obviously you would check the pin outs compared to one another before plugging the box in so as not to fry anything. If it did, you would just have to add a few wires, and get the calibration changed to make it all work.

XJared
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I just did a quick check on one year. Looks like the 94 Z32 and 94 Q have the same ECM connector and a lot of the same common pin locations for power, ground, etc..

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MeanGreenS13
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can you give me the 2 pinouts you were going by, I would like to sit and disect them to make sure everything is the same.

XJared
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I'm just looking at powers and grounds. Who cares if it's all the same as long as the connector is. Moving/adding a few pins is nothing. Here are the two.




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Chrispy300
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Yes, the plugs are the same on the early Z/Q's too. Problem is the Z ecu has 6 injector and coilpack drivers, the VH needs 8...

I'm not sure what goes on inside the AEM box, but you would want to be damn sure that it had 8 drivers before you fork out all the dosh on it.

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hannibal
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This thread has some discussion about using the Z32 EMS with a VH45, but no definite answers. Looks like Jared posted in there, and the thread was started by a NICO member...

http://forum.aempower.com/foru....html
Modified by hannibal at 5:00 PM 3/19/2010

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MeanGreenS13
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i guess the easiest thing to do here is get on the horn with AEM and ask them straight up, if the Z32 unit can be edited to control 8 injector drivers rather than the factory 6. If that's the case, then it's as simple as re-pinning what needs to be re pinned on the plug VIA the diagram posted here and voila VH45DE AEM EMS!

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MeanGreenS13
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Just sent an email to AEM. will post the response when/if I receive one.

I basically asked them if all of their S2 units have the ability to be edited to add injector drivers.

if this is a possibility, the VH guys just found themselves a standalone with a little work re-pinning the ECM plugs.

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Carl H
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z32 ecu can be remapped to suit the q45, you may have to swap some jumpers to redirect pin triggers but past that its plug and play...perhaps a little repinning but nothing terrible.

and i still am owed for a certian NISMO FPR...

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MeanGreenS13
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totally spaced out dude, sorry bout that!

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speedeast
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http://www.velocitymania.com/P...1902U

Option?I haven't gotten this far in my build yet, but I guess it's getting time to think about it.

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MeanGreenS13
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I think I am aiming more for the S2 system. But i bet they will have similar for that as well, definitely an option.

Carl has told me tho that he knows for a fact that besides re pinning the plug and editing a little software in the box, the Z32 unit will work perfect since the plug is the same.

XJared
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All the AEM boxes come with the same number of injector and coil drivers, they just aren't pinned or enabled in some boxes. For example, the Z32 series 1 box actually has 8 injector outs and 4 coil outputs, but only 6 injectors and 3 coil outputs are enable in the software. I have installed Honda boxes on a variety of engines just because they are widely available and connector kits are easy to get so you can build a nice looking harness.

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MeanGreenS13
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so then what exactly would need to be done?

from what I understand (correct me if i'm wrong)

I would have to program the box to use 8 injector drivers and 4 coil drivers? as well as pin the plug to do so?

XJared
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MeanGreenS13 wrote:so then what exactly would need to be done?

from what I understand (correct me if i'm wrong)

I would have to program the box to use 8 injector drivers and 4 coil drivers? as well as pin the plug to do so?
Basically, yes. I would start out with a basemap for the Z32, then enable the extra coil and injector outputs, change the injector and coil phasing to fire all of them. The AEM would also allow you to remove the MAF and convert to a MAP sensor, which I would recommend.

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MeanGreenS13
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Sounds simple enough, I think this thread is helping A LOT of people too. Until now not much of this has been discussed that I have been able to find. I even had a local friend contact me saying "he's watching me" and "learning a lot of good info" from this thread. I hope it's really becoming that useful.

Also, does anyone know if the plenum will clear the S14's factory hood with the Mazworx mounting kit? if not, I'll build a custom one, but I want to keep the long runners on the factory manifold for the TQ... and I kinda like how it looks haha

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speedeast
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I'm custom fabbing all of my mounts, so I can't say if they'll clear... As far as I know, the plenum will clear just fine. Wait til you see my mounts... much more practical than the Mazworx style.

All this AEM talk is helping me out tremendously; I was planning on doing more research anyhow. Most of the research grunt work is done, awesome!

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MeanGreenS13
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I like to dig really deep and make sure ALL bases are covered. Unfortunately, I have not had proper funding for my past cars. I will be sure to make this one different.

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speedeast
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Check out my build if you haven't. I've sworn not to cut corners either. I would love to go with the AEM option out of the box, but I'm going to be running everything pretty much stock for now until I have more funds for the cool little gadgets.

carfrk666
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[QUOTE=MeanGreenS13]your in the wrong part of the country lol you need to be a little further east. Massachusetts, in the county i'm from alone has over 2200 jobs listed on craigslist. that doesnt include local listings in papers and monster.com etc[/QUOTE

sorry i forgot to change that, i moved back to CT, i was just going to school in ohio for a few years

Jeff Taylor
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I may be able to answer some questions. I have been running an AEM 30-1010 EMS on my VH45DE-T for a year now. It's a Honda box that I adapted over to run the V8. Bought it for $550.

My box has enough injector drivers to fire all 8 injectors, and 4 coil drivers to run a wasted-spark setup using the stock COP's.

On the previous ECU (stock one that I chipped), I made 446 wHP @ 6psi on a Garrett TV7512 turbo. It's actually a 72mm compressor wheel with a 1.08 A/R T6 turbine housing.

I took the engine out for the winter to update some drivetrain parts and build an intake manifold with 1600cc injectors. Hopefully I will have a new dyno plot in a few weeks running on E85 and a lot more boost. An original goal of this project was to attempt to get an idea of the stock internal power limit of the VH45.

Jeff

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MeanGreenS13
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thanks for that info!

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Chrispy300
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Carl H wrote:z32 ecu can be remapped to suit the q45, you may have to swap some jumpers to redirect pin triggers but past that its plug and play...perhaps a little repinning but nothing terrible.
You got some more info on that? Still supports both CAS's and all that? I'm very curious as VH ecu's are thin on the ground over here...

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elwesso
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Carl H wrote:z32 ecu can be remapped to suit the q45, you may have to swap some jumpers to redirect pin triggers but past that its plug and play...perhaps a little repinning but nothing terrible.

and i still am owed for a certian NISMO FPR...
what would be the advantage to doing that?

XJared
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elwesso wrote:
what would be the advantage to doing that?
Using the Z32 AEM would plug into the Q harness, you would just have to move some pins around for the extra injector/coil outputs. Easier than wiring in a Honda or universal box by scratch.

karay24O
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MY main concern would be the CAS. With as much problems that they were having with the hall effect type sensors, I doubt that AEM has an option to use the VH CAS.

Wish they did, though.

I have seen a VH powered Z32 running on an F-con. I'm not sure as to whether they were using is as a full stand-alone or a piggy-back. I wasn't that interested in finding out as I'm not privy to the software, didn't really care enough to ask many questions about it.

XJared
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karay24O wrote:MY main concern would be the CAS. With as much problems that they were having with the hall effect type sensors, I doubt that AEM has an option to use the VH CAS.

Wish they did, though.

I have seen a VH powered Z32 running on an F-con. I'm not sure as to whether they were using is as a full stand-alone or a piggy-back. I wasn't that interested in finding out as I'm not privy to the software, didn't really care enough to ask many questions about it.
I know it would run the VH CAS. All the Nissans use the same pattern CAS, 360 slots on the outer ring, inner ring slots match the # of cylinders.

I would recommend, however, switching to the AEM CAS wheel, which switches the pattern to a more common 24 and 1 which syncs faster and is less prone to high rpm hickup.

Jeff Taylor
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karay24O wrote:MY main concern would be the CAS. With as much problems that they were having with the hall effect type sensors, I doubt that AEM has an option to use the VH CAS.

Wish they did, though.
Like I said - I am currently running an AEM EMS on my VH45. I am using all of the OEM VH45 sensors, except I switched from MAF to MAP (but you don't have to).

If you use a Nissan AEM EMS, you will not have to switch jumpers and re-solder resistors within the EMS like I did. For economic reasons, I adapted a Honda 30-1010 EMS to run my VH. I had to flip a few jumpers inside the box, resolder 1 or 2 resistors, and begin my programming with 300zx maps.

Of course the injector & ignition phase angles had to be changed in the software in order to fire all 8 coils and injectors...and some custom wiring had to be done, but it works.

Because the original AEM EMS's did not have low impedence injector drivers I assembled an inline injector driver board commonly used on Megasquirt setups. This allows me to sink enough current through my 150lb/hr injectors so that they snap open quickly at idle.


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