Vg33er and vg30

[Superduperchargedvg]

Anyone ever swapped a vg33er or actually modded one? I have a post in the truck forum to get their attention too so don't move my post. I want answers from z31 guys. Who has done a vg33et? Which ecu did you use? I'm pissed at the lack of support for my truck (no nistune, jet, Jwt, only ones I have personally called) i want to know if I can repin for a vg30et ecu. Boost is boost. Mine doesn't have a map sensor. Does vg30et? I'd love to have one. And as far as ignition maps i could probably run one of the many maps for z31. Or maybe just a msd btm. I would like to do a standalone but honestly don't have the time or patience right now to tune a million different parameters

[evildky]

I knew a guy once that had a sc truck, he had a smaller pulley and I can't recall what else done to it needless to say he was running a few more lbs of boost. Not much aftermarket support for the Z31 either, we have to use knowledge and logic in our builds not just a credit card number The Z31 does not use a map, the beauty of this is what is called a metered air system. meaning if you increase the amount of air coming in the ecu knows how much and corrects within a certain range. a MAP based system is simply pressure so any change requires a retune. This means that unless you go crazy with your build you can add a smaller pulley or a turbo and not need a retune. Keeping in mind that your ecu, maf and injectors are only capable of so much, I can't say where that line is on your er but for the z31 it's around 280 whp. Your truck is also an OBD2 whereas the Z31 is OBD0 meaning you can't simply swap ecu's without opening a whole can of worms. It does appear that nistune as well as other romulators work on nissan obd2 ecu's meaning it is a tuning option although they are not built around your engine it should be workable if you are willing to put the time into it. Have you spoke wiht the nistune guys? I'd be surprised if it took much work to adapt one of their existing romulators to your application.

[Superduperchargedvg]

Yea I call and tell them I'm trying to do this to a vg33er and as soon as they hear it they say nope. And I'd love to have nistune but when I called and was just asking the guy since y'all don't support my ecu what can I do man. And he suggested a 1990-92 Infiniti m30 ecu. Now that's still obd2 why wouldn't he suggest a vg30et ecu? I know that z31 has a maf.my build is very mild. Headers no cats vg30 cams and a ram air. I have the pulley haven't put it on yet and only other mod I wanna do is a water meth injection and maybe a 50 shot. Something low Bc I only wanna cool my Intake temps on hard pulls. Did z32 have obd2? Could I use nistune to "bypass" the dohc and run it without it trying to adjust my non existent variable cam timing ?

[evildky]

The 90-92m is obd1, the vg30et is obd0. The 90-95 Z32 is obd1, the 96 is obd2. The 96 obd2 z32 lacked variable valve timing as so that would not be an issue. The issue is that the z32 uses a 6 channel COP ignition system. The optical distributor actually works the same as the cam mounted cas on the vg30de in theory you could adapt the entire 96 harness and ecu and even the ptu and cop's.

Water meth injection isn't really about adding power and doesn't work like nitrous, it does lower intake charge temps and can gain a few hp but not significant.

[Superduperchargedvg]

We'll it's 110 outside. I have no intercooler and plan on doubling boost once I get this issue straightened out. So I'm definatly going to be doing water meth before the blower to help cool the rotors as we'll. in a few years I'll build an adapter so I can have an air to water intercooler

[Superduperchargedvg]

So are you saying a 96 is a vg30ett?

[evildky]

Nope it's still a vg30dett, it just lacks the variable valve timing on the 90-95 models. Still have 4 cams just no vtc solenoid.

[Superduperchargedvg]

Do the coil on plugs have a little bit of sub harness between the coil and plug? Like a newer vortec engine does ? That's the only way it would work for me . I do appreciate the responses man . The truck community of first gen frontiers isn't Into boost lol. Only lifts so the z guys and y'all's experience is the only thing going for the vg

[evildky]

The vortec engines are fired from the ecu, the z32 is fired from the ptu.I can't speak for newer gm's but older ones were wasted spark whereas the z32 is sequential. The z32 coils have a boot that connects them to the plug, the cop's for the gm's use a small plug wire. Yes you can use gm style coils you'd just have to wire them up, the ptu will still fire them as long as they use the older 5v square wave signal. a lot of newer obd2 (like the 350z) cars use millivolt trigger for the cop's. I have no idea if gm made this switch or not I know the older ones were 5v square wave.

[Superduperchargedvg]

I suppose I could have worded that differently. Could I use a spark plug wire from each coil to the plug or would I have to use the boot. I don't see why a small spark plug wire wouldn't work. Is there some type of cam sensor in place of the distributor?

[evildky]

I haven't removed a boot from a z32 cop to see if you can just put a standard wire on it, I kinda doubt it, worst case you use gm or similar cop's from the same era.

[Superduperchargedvg]

I'm also considering this piggyback that seems too good to be true . Ever heard of mapecu3? It's like all the piggypacks in one . Boost timing . Speed density. Air fuel controller . knock control. Are there other piggybacks similar?

[evildky]

Most piggybacks only manipulate incoming signals from the mas, to allow for tuning of fuel curves or scaling for larger injectors. There are some that do timing as well but they are less common. Tuning for spark pretty much requires a dyno. You might want to give the guys at diyautotune a call. I know they have systems that work with obd2 nissans. Great guys, very smart, I know a couple of them and would trust them completely. Honestly whenever my datsun goes back together I'm thinking I'll take it to them for final tuning.

[Superduperchargedvg]

My only question is what would take the place of my current distributor? Because I plan on swapping to z32 ecu. Harness. Injectors possibly. And the coils but are they from the ecu? Or do they have a cam sensor that detects and delivers spark? Like a 4.0l jeep the cam sensor is a direct plug in from the distributor

[evildky]

If you run a Z32 ecu you'll also have to run the z32 cop's and ignitor, or at least the ignitor you can run a brick type coil pack if you prefer but it needs to be 6 channels, can't be a wasted spark type as the z321 is fully sequential. Part of your distributor will have to stay, the shutter wheel inside might need to be changed to the z32 wheel but the signals are the same as the z32 cas.