Outer Limits 4x4 Board

VP 44 mate i think he was only running 16 psig of boost , but a torqie little bastard ill dig the dyno sheet up and pm it to you as im sick of the whole dyno this dyno that blah blah bla with certain people trying to blow their own trumpet , its a good reference as it has rpm aswell

bosch had a listing of kw per cyl for the vp44 pumps. they make 2 main sizes. what it does when hotrodded as the usa guys do is any ones guess. i would say probably more than what the engine can handle

These pumps (at least the Japanese version), only seem to need a 2 wrie signal to the spil valve - this is correct right?

What does the signal look like; I am assuming its a peak and hold signal with pwm and timing much like sequential timing on a petrol solenoid injector?

Seems to me very easy to get something like a Megasquirt to control it if that easy....

I am sure I am missing something ....cant be that easy.

Dieslex wrote:These pumps (at least the Japanese version), only seem to need a 2 wrie signal to the spil valve - this is correct right?

What does the signal look like; I am assuming its a peak and hold signal with pwm and timing much like sequential timing on a petrol solenoid injector?

Seems to me very easy to get something like a Megasquirt to control it if that easy....

I am sure I am missing something ....cant be that easy.

I keep reading CAN-BUS. Does the FTE use a VP44?

I just dont know, someone please put me out of my misery ;-)...... I thought it did, but the VP44 I see in the USA has a ecu sitting on top.......the one on the 1HDFTE doesnt appear to - just has 2 wries to a spill vale and some low volt timing detect wires back to ecu.

The principle of the VP44 as I understand is a rotary ring that pushes radially located plungers. These feed a distributor head via a hollow rotating shaft like a VE but without being also used as a plunger. Since this is the same principle as the pump on the 1HDFTE, I figured it was a VP44..........maybe it is a unique pump

KiwiBacon wrote:

Dieslex wrote:These pumps (at least the Japanese version), only seem to need a 2 wrie signal to the spil valve - this is correct right?

What does the signal look like; I am assuming its a peak and hold signal with pwm and timing much like sequential timing on a petrol solenoid injector?

Seems to me very easy to get something like a Megasquirt to control it if that easy....

I am sure I am missing something ....cant be that easy.

I keep reading CAN-BUS. Does the FTE use a VP44?

The VP37 is the other one without the ECU of it's own.

I think the big difference between them is the VP37 is a dumb pump that gets sent actual voltage etc signals from the main ECU. With a VP44 the main ECU actually requests injection volumes, which the pump ECU checks with position feedback.

Well that is awesome, the dumb pump is what I want!

Except after light research since posting....

The pump on the 1HDFTE is dumb like the VP37 but has radial plungers like the VP44, its called a VP4

So I am really wondering then if it would be easy enough to build an ecu for it.

FYI, you only need a low V signal with pwm and timing which goes to a dumb amplifier that assignes a 150v peak for the peak and hold style spil valve solenoid....

I am being a bit lazy asking these questions, since I have a handheld scope and could check myself.....

Anyway..... it's OT and while I am happy, it doesnt help you (lol)

KiwiBacon wrote:The VP37 is the other one without the ECU of it's own.

I think the big difference between them is the VP37 is a dumb pump that gets sent actual voltage etc signals from the main ECU. With a VP44 the main ECU actually requests injection volumes, which the pump ECU checks with position feedback.

VP37 is essentially a VE with electronic controlled spil valve

KiwiBacon wrote:The VP37 is the other one without the ECU of it's own.

I think the big difference between them is the VP37 is a dumb pump that gets sent actual voltage etc signals from the main ECU. With a VP44 the main ECU actually requests injection volumes, which the pump ECU checks with position feedback.

Zd30 engines in navara and patrol use a Zexel vp44 pump. The connector has 6 wires at the back of the pump, can hi and lo, 12v and earth, a tdc signal and one other one which im trying to figure out. The pump has its own calibrated ecu which talks to the vehicle ecu via the can system. From the pump ecu it has inputs of angle of rotation and outputs to the timing control valve and spill valve.

The toyota is is denso system ecd v4 or 5 from memory, that has a rom on the side of it for calibration, but the vehicle ecu controls the spill valve and tcv.

Fuel delivery would be determined by pump plunger size. The dodge guys in the states make 800 hp from these, but I have no idea what they do to them. I don't think anyone in oz has even modified a vp44 or denso pump to go futher, I may be wrong.

Vp37 pumps are on mitsubishi engines. Any if any one can retune a denso or zexel ecu, they will be in for a lot of work. It looks like they are almost impossible to do.

Andy

Dzltec wrote:Any if any one can retune a denso or zexel ecu, they will be in for a lot of work. It looks like they are almost impossible to do.

Andy

I know of an engineer in the UK who has remapped his denso. Wish me luck with the zexel.
Replacement chips have arrived, still waiting on the sockets. Wreckers want $800 for a spare ECU, so that's only going to happen if necessary.

KiwiBacon wrote:

Dzltec wrote:Any if any one can retune a denso or zexel ecu, they will be in for a lot of work. It looks like they are almost impossible to do.

Andy

I know of an engineer in the UK who has remapped his denso. Wish me luck with the zexel.
Replacement chips have arrived, still waiting on the sockets. Wreckers want $800 for a spare ECU, so that's only going to happen if necessary.

Have you contacted http://www.piasiniengineering.com/" onclick="window.open(this.href);return false;? They do all the software for any nissan used ecu.
Christian is a very big help. His english isnt great but he is very knowledgeable with the yd25/zd30 ecu's.

Northside 4x4 wrote:Have you contacted http://www.piasiniengineering.com/" onclick="window.open(this.href);return false;? They do all the software for any nissan used ecu.
Christian is a very big help. His english isnt great but he is very knowledgeable with the yd25/zd30 ecu's.

As far as I can tell, the euro nissans have different ECU's to the JDM vehicles I'm playing with. The Piasini name keeps coming up with scan tools for reading/writing the denso ECU's but the Zexel are one-time-write. You need to swap chips, which is where I'm headed now.

Yes ive heard of piasini.....but the italians with no offence are hard to get info from....or quickly. How about you become the master distributor northside and we become agents. I am up for that.

Good luck Kiwi

Andy

Lol he doesnt miss you with price, ill tell you that much.
Looking at around 5K Pounds for a master suite, and another 1.5K for a slave suite.

I have not thought to ask if another distributor was needed, he does supply with a slave suite, maps for you to load on to each ecu, or the master basically grants full remapping access with slave support also.

I will link our email conversations on monday as its hard for me to type out what all of the details are.

Kiwi - If they are just EPROMS fair enough, and the direction you take is the only one possible.
Placing an EEPROM in there will indeed give you access to read/write ability, and if I were you I would formulate a set of instructions while undertaking the project and either sell an instructional DVD or book on it, as there would be a market for this type of ecu.

As you know, my opinion on remapping is. The only drawback to it, is the inability to tune live.

Remap is successful so far. I've been through three iterations and the car starts and runs fine with each. I haven't yet fitted a turbo or measured peformance but it's now a lot less of a slug. I've only tweaked torque limiters and airflow tables with the intention of getting the most out of it's non-turbo state.

sounds good, keep us updated