megasquirt on vh45de

[slownslurious]

anyone done it yet?

[Raxephon]

None that have posted on any Nissan or Megasquirt forum/board.

[elwesso]

itd probably be really good to run on. Friend of mine has one on his L28ET swapped 240Z... I was impressed by how well it worked and how simple it was... ITd be better where you dont need a bunch of control over stupid stuff.. IE i wouldnt use a megasquirt on a Q45 setup but in anything else i bet itd work great.

[Stinky]

I've looked into using megasquirt on a 2jz. The main problem I see with using it on a vh45 is that the vh uses coil on plug and sequential injection. You may be able to rig it up using wasted spark and batch injection but its not ideal. There is a router board in the works that would allow COP and sequential injection but its not out yet.

[slownslurious]

yeah the coil on plug thing I've been thinking about. I know on my 1.8 liter you can just switch the COP to the ford EDIS (electronic distributorless ignition) because it uses a trigger wheel instead of a CAS (although the board to use the CAS should be out soon). But I don't know if there is a similar swap over from any v8 that would work. I don't think there would be a big problem with going from sequential to batch, if you are a tweaker you might lose a little bit of power but with most engines driven under most conditions its not going to make a difference anyway. the 1.8 is sequential but it goes to batch at WOT or above like 5k rpm anyway (so maybe part throttle would suffer).I'm gonna be getting a VH45DE and going forced induction and I'm thinking it would probably be easier to make megasquirt work on the v8 than it would be to try and make forced induction work on the stock ECU ( and the whole thing in a different chassis anyway ).

[defrag010]

I was all into the megasquirt 2.2 a year or so ago, and I would definately use it on a forced induction car. However, on a mildly modded n/a car, I think you would get better results from using a romulator on the stock ECU.

[slownslurious]

this one is going to be forced induction for sure. plus I've never worked with the stock vh computer before. I haven't worked with romulators either i'll have to do a little research on those. i think megasquirt is probably going to be the way to go though.

[elwesso]

we can make you a boost ECU for anything within the stock injectors (450HP or so)...

[slownslurious]

whats the price on that? and is that for some generic "chip" or is this something I can take to the dyno and fine tune it for my altitude and octane etc....

[UMS_CA18DET]

I've looked into using megasquirt on a 2jz. The main problem I see with using it on a vh45 is that the vh uses coil on plug and sequential injection. You may be able to rig it up using wasted spark and batch injection but its not ideal. There is a router board in the works that would allow COP and sequential injection but its not out yet.

Actually you can get megasquirt to work with Coil On Plug without the need of router board, just takes a little more work. also sequential injection is only really good for low rpms and idle. Once you get past 3000rpms sequential injection becomes batch because after 3000 rpms the injectors will get to a point where they are constantly open.

As for N/A I dont see why that would deter from going megasquirt. With a standalone you get more control so it would be better for N/A.

Also if you decide to go the FORD EDIS route Pumaking/MegasquirtCA can build the ecu for you.

[slownslurious]

I don't think the 4 cyl EDIS would be compatible with the v8... I don't know if ford used that on other vehicles (like v8 ones) that might transfer over. I'll have to look into that.

[Clifton]

There is EDIS 4,6,8. I'm using MSII with edis6 on my 7M. I will for sure be using it on the VH45 when the time comes.

[slownslurious]

good to know.. what 8 cyl vehicles did ford offer it on? (junkyard hunting, lol).

[Clifton]

90-97 4.6l V8's. I don't know what the VR sensor looks like on the 8's but I know the V6 ones differ from the 4 cyl ones. You can mix and match. I used an Escort VR sensor and 36-1 wheel with an EDIS6.

[slownslurious]

I already have the EDIS off a 1.9 scort down in a box somewhere, are all the trigger wheels 36-1, even the v8's? I wonder what diameter they are. I'll probably have to get a custom pulley machined for the v8 anyway.

[Ezekial]

also sequential injection is only really good for low rpms and idle. Once you get past 3000rpms sequential injection becomes batch because after 3000 rpms the injectors will get to a point where they are constantly open.

NO!

[Clifton]

Yes, all the wheels are 36-1, each tooth is 10* for a total of 360* minus the one for location. I haven't seen a v8 wheel. I know an Escort pulley is alot smaller than the VH45 pulley. I machined off the outer flange on my 7m and pressed the 36-1 onto it like the escort one. Can't to that on a VH though. There is enough meat on the front of the pulley to bolt one on though. You could make or buy a pulley whatever diameter you need. then bolt it to the front, this is what I'll be doing. Check this place out http://www.trigger-wheels.com/

I already have the EDIS off a 1.9 scort down in a box somewhere, are all the trigger wheels 36-1, even the v8's? I wonder what diameter they are. I'll probably have to get a custom pulley machined for the v8 anyway.

[UMS_CA18DET]

NO!

No what? shoot if your gonna post a stupid comment atleast try to post something informative.

zerothread?id=117260

read the part about sequential and batch.

[UMS_CA18DET]

Slow - when you said you got the EDIS already did you mean module? If so which module did you get because you need the one that says EDIS-8. As for coilpack you use 2 of the 4cyl one.

Here is a EDIS-4 kit. Same as EDIS-8 except you'll have 4 more plugs, 1 more coilpack, and the module will say EDIS-8.

You've probably seen my write up.

zerothread?id=164446

you can follow that write up some things vary.

[Clifton]

You know there is a Mustang guy on the MS board that runs edis8 but with a dis4 and COP. here's the link. there is alos another COP link.

http://www.msefi.com/viewtopic.php?t=11602

http://www.msefi.com/viewtopic...2ecf8

[slownslurious]

I had stripped the entire 4cyl system off an escort to use on my ca18 but I think I'm gonna be selling that motor since I bought one of the adaptors to use the Z32 trans to the vh. so its downstairs in a box now.

[Ezekial]

No what? shoot if your gonna post a stupid comment atleast try to post something informative.

zerothread?id=117260

read the part about sequential and batch.

you said above 3000 rpm so i'll run with that

remember sequential injector fire = every second revolution

@ 3000 rpm = 0.020 seconds / crank revolutionor 20 milli seconds / revolution or 40 ms available open time

@ 4000 rpm = 0.015 seconds / crank revolutionor 15 milli seconds / revolution or 30 ms available open time(Q45 roughly 11 ms injector open time)

@ 5000 rpm = 0.012 seconds / crank revolutionor 12 milli seconds / revolution or 24 ms available open time

@ 6000 rpm = 0.010 seconds / crank revolutionor 10 milli seconds / revolution or 20 ms available open time

@ 7000 rpm = 0.00862 seconds / crank revolutionor 8.62 milli seconds / revolution or 17.24 available open time(Q45 roughly 9 ms injector open time)

@ 8000 rpm = 0.00750 seconds / crank revolutionor 7.5 milli seconds / revolution or 15 available open time

i believe Q45tech has stated the maximum inj open time for the Q45 is around 11 ms @ 4000 RPM = NO WHERE NEAR CONSTANTLY OPEN (even if you allow a 2 ms delay for injector trigger)

zerothread?id=153295

[slownslurious]

I think the real reason that batch vs sequential makes such a small real world difference is that at higher rpms the difference in time between the firing of the cylinders becomes nominal and cylinders fire close enough that batch injection is approximately close enough to the compression and ignition that any gains from sequential injection would be minimal. at lower rpms, the engine is making fewer revolutions per minute and there is more time between each individual cylinder's ignition, and therefore batch injection might not deliver the smoothness and efficiency of combustion that sequential ignition could offer.This is my understanding of how/why the sequential systems operate. Also notice that I am not ruling out the possible power/smoothness gains of sequential ignition, just noting that as rpms increase the difference would be smaller. And since most sequential systems of the era switch to batch at predetermined rpm's, they have sequential injection during the rpm range where it is most beneficial.

[slownslurious]

I want to bump this if anyone has any more info on the megasquirt on VH45 and can or wants to help me out I'm at the point in time where I am gonna buy buying some stuff and starting to hook things up so shoot me an email [email protected] or post on here. thanks