GrayZee

I am wondering how the vct works in a z32. What controls when and under what conditions it turns on. Basically we have a AEM computer and were thinking of modifying the how it is controlled, is this possible?

He lives (lived) in Surrey, British Columbia if that helps.. Also, try PM'ing Drax240 he might be able to tell you something.

At the very least, disconnect the wastegate pod arm.. Then wire the bypass puck wide open. This way the turbo will not spin as much. Don't drive it hard at all.

Guys have been known to use 90+ Pathfinder uppers. They flow alot nicer and bolt right on, although a few other mods are required. The have a acticle about it on z31.com I believe.

I haven't gotten mine up and running yet (I'll have a very similar setup) but I am guessing that 10psi on that Holset will feel just as strong as 15psi on the stock T3.. would that be a fair statement?

I agree as well

Yes, that would be the output from the EFI relay... it goes to numberous things such as AFM, CAS, EGR/AAC soleniod, and a few others I'm sure..

This has been posted before.

The colors on the mini-harness from the actual CAS sensor to the connector are different colors from the actual wiring harness. I go by the wires that go directly into the CAS itself. RED (+12v source from efi relay) BLACK (ground) GREEN (either pin #8 or pin #17 at the ecu) WHITE (pin 8 or 17) Sorry, I don't have exact info on the Green and White wires at the moment as I'm not at home. I think pin 8 is white, but I'm not positive without checking my notes.

you have to take the factory gauges apart, use the black plastic bezel peice and install the autometer gauge inside it. Then worry about putting it in your dash. As for the 5" ones.. guys just silicone them in.

Yeah, sounds like she is leaking under boost.. another thing to be aware of when installing a BOV is that sometimes the ecu will not like it unless you are running a MAP based system. AFM and MAF's will have their readings messed up durings shifts and cause black smoke out the tailpipe. Not only that, some BOV's leak ever so slightly even at idle (mine did) and it ran like crap untill I recycled the outlet to the air intake after the MAF. Once I had all the right plumbing it worked fine and that slight leak didn't matter anymore.

There has been success in using the modifying the stock afm to run larger 370cc injectors. I don't recall who.. (ScottyMiz perhaps?) but if you ask me, the z31 system is far superior.

I honestly can't speak for how the 5800ft and the head gasket/cam mods will effect it, but to me 100psi sounds low.. really low. Last time I checked I had like 150psi on a high mileage engine, and my buddies freshly rebuilt L28et had 160psi. Perhaps it is your rings?

Ever consider running a water/meth injection setup? It can really increase the engines.. how should we say?... "blow up limit" Bernard has been running 20+psi on a completly stock high mileage engine with the aid of alcky injection for a while now. Pehaps run 15psi all day long, and when you turn it up to 20 you can let the spray keep you safe. That way you don't have to filler up all the time.

Ha ha... I was thinking the same thing... I already got my z32 tranny, just need the adapter now!

ahh.. good ole princess auto... they will take back anything, no questions asked. My buddy (BRADD) bought a $400 electric bandsaw, used it two years and was there one day eyeing up the (better model) He explained to the sales guy that he bought the cheaper one a while back and was never really happy with it. They told him to bring it back and upgrade. He said, but no, it was like two years ago and I don't have the receipt anymore.... No problem! They gave him a $400 credit towards the better one! On a side note, I bought that same chopsaw for $80, works fine...

Mine was from a 2003, other than that I have no idea. I just look at the pics on ebay.. LOL

The EFI relay receives a signal to activate from the ecu, but the output from the relay also goes back to the ecu (sort of like having two stages of the ecu turning on) So yes, with out that relay, the ecu will be a dead stone. The efi relay is also responsible for powering up several devices. Of which the only ones of ablsolute importance are the CAS and AFM, as it provides them with power. The wire that doubles back from the efi relay to the ecu goes to pin#6

Unless you are worried about originality... You can always buy a universal one that just goes in the hose.

Water injection can prevent detonation on a NA car, this is true.. but I think what I was trying to say is that there is not much point as there are not many situations were a NA car presents that much of a pinging problem compared to forced induction. It would just be easier to run higher octane fuel, retard the timing, ect.. I have seen aclky injection kits for NA cars, but that is getting extreme. I would guess you would use that on a allmotor race car. Or maybe a tow truck or something hauling a real heavy load! Ha ha...

There isn't much point in doing that to a naturally aspirated car...

The ecu only sends a signal to tell the fuel pump relay to turn on... it does not know anything else. So... if you were to hard wire the fuel pump to a toggle switch and achieve fuel pressure in the rail, then yes the engine would run without the fuel pump relay assuming everything else needed was working. Basically you need: AFM CAS Coil/ignitor TPS CHTS injectors ECU Battery EFI relay

I am curious if anyone else running a Holset has experienced problems? I know Honda's typically use restrictors but then those Vtec engines run extremely high oil pressures.

Very true indeed.. Where I live the roads are ice/snow covered for almost half the year and I never really was a fan of FWD. Almost every vehicle around here is though. FWD will have (or seem to have) better handling and traction than a RWD car and for the most part it is true. The thing I don't like is that FWD can be driven very near it's limits on these sorts of roads with very little warning that you are going to skid out. With RWD, you get LOTS of warning and it basically forces you to drive slower. It makes me wonder about the old days when almost every vehicle on the road was RWD.

LOL.... I will bring down all z31 stuff....