Hello everyone. I am new at this forum, but I am usually over at zcar.com daily. I figured since this site is relevant and specific the Z31 and since I own a Z31, why not spend some time over here. Something new, something fresh. Anyways, I'm glad to be here.
So, I've got an 87 n/a 2+2 5-speed in stock form that I love and drive daily, unless she breaks! Me mental dilemma is this...
I want to turbo charge the car. Turbo Z's are hard to come by in my location. So, I have been toying around with the idea of doing a stock late Z31 turbo setup. I've gone over REDZ31's site more than a few times and done my research over on some other sites. Though There are a lot of options and complications, I do not see what cannot be done to make this a reality.
Goal-wise, all I am looking for is just to give this Z a bit more kick. I love the 9 to 1 compression and the high torque that it gives me to get up quick around town. I suppose the R-200 3.90 in the back has a bit to do with that. I would like to see a little quicker throttle response once it really gets going down the road. I'm not looking for high boost or racing applications. In fact, I was thinking more along the lines of the stock setup of an 88 - 89 turbo and still be able to retain the air conditioning. Logically, it seems the safest, most efficient, and cheapest pay route to go. more like, the best bang for the buck.
I figure that using the following parts would be sufficient and easy to come by and able to swap right in:
- 88 - 89 T ECU & H.I injectors. Wiring harness???
- T25 Turbo Charger assembly and associated piping, water, and oil lines.
- exhaust manifold, elbow, downpipe, O2 sensor, and TPS.
- intake piping, oil cooler assembly, T idle control valve, and replacement cross member or modification.
after doing some reading, I don't think it is really necessary to use an intercooler with the small amount of boost that the T25 produces. And I don't think it would be too much harm to use in conjunction with the n/a pistons = higher compression. I mean wouldn't they compliment each other? 4 -5 psi of boost is not that much. What was the compression ratio in the 88 car, 8.3 to 1 or something similar?
I have found after going over parts diagrams from courtesy parts Nissan, that the MAF, TB, distributor, fuel pump, FPR, flywheel, and several other parts are the same on both the n/a and turbo cars? So, I think there are many things that aren't needed to swap. I may be wrong on that.
I am not sure if the turbo bypass valve and the knock sensor are really needed either.
I think this could be a safe, fun, and reliable application. So, why not? My motor has to be torn down anyways because it eats up oil (worn parts... valve seals, valve guides, and piston rings, I suppose) At least this is what I think is happening in there... there is some kind of internal miss fire. maybe a sticky valve? Anyways, I am considering having the engine overhauled, so if am going to go turbo, now would probably be the time to do it.
Your experiences? What do you think? Am I out of my mind?
Thanks,
Bon
-from Abu Dhabi, United Arab Emirates.
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