pjo046

I'd go for the T3/T4 hybrid if I was you. I think this will give faster spoolup compared to the holset, and thus better driveability on the street. The holset is better for top power, but as you are only shooting for around 350hp, the T3/T4 is more than up for the job.

Stock turbo CR is more like 7.5:1 than 8.5:1.

I sold it two years ago, but I've regretted it ever since....

Here's the 260Z 2+2 that I used to own: http://www.cardomain.com/ride/699828/6

Some people have experienced some problems with Steve Nelson at Top End Performance. I bought a crank-trigger kit from him. When I installed it and found top dead center, I noticed that the crank trigger wheel was mounted one tooth wrong compared to what the instructions in the TEC3 manual says. But that's no problem, as you can adjust for that in the software. But it is important to check this if you buy a kit from him.

What do you mean by gray? Is it bluish? White smoke is coolant, white/blue smoke is oil, and black(gray) smoke is too much fuel in the combustion.

I see. But if you are planning on building a proper engine out of this in the long run, you can still use the T3/T4 hybrid when that time comes. I have a T3/T04B hybrid custom made by James Thaggard, and that turbo is good for 450hp. I'd rather dish out some money for a new turbo and exhaust manifold than upgrade the exhaust system if I were you. But then again, using the system as it is now will probably work fine as well. But I wouldn't start upgrading the exhaust if you might have to change it in the future anyhow.

problems with the air fuel meter? Have you checked the spark plugs?

I had a rajay-turbo like that on my previous Z(260Z 2+2), and it was good for about 250hp. I had a fmic though, and a piggyback controller and two extra injectors before the TB, in conjunction with the stock L28 efi-system. The car pulled good from 2500rpm and onwards, I hit peak boost(14 psi) at probably 3700-4000rpm. But in the long run this wasn't enough power for me, combined with my need for a coupe instead of a 2+2, so I sold the car and has been working on my next project ever since. If I were you, I'd get hold of a cheap OEM exhaust manifold and buy a new T3/T4 hybrid turbo and take things from there.

Hi! Haven't been around for a while, been busy rebuilding a house, progress with my studies and working part time at two pharmacies. The flushseal plugs worked out fine. They we're a tad small, so they felt a bit loose(narrow grooves after tapping due to the hole being a bit big), but I used lots of loctite. As for the gasket, I ended up getting a new one from MSA with square exhaust ports. It was one of those with metal reinforcement, so it was a struggle to trim it to oversize ports. I haven't worked on the engine for a while now. The last thing I tried to do was installing the oil dipstick. First then did I realise that the crank scraper didn't have a hole for it. So I need to do a few things over again.

Forgive my incompetence, but: When you measure the diameter for a bolt, is that the hole-diameter, or the bolt diameter(which is wider because of the threads)?

Nevermind about that block plug I was talking about. It's not the one between cylinder number 5 and 6. I don't have a plug there. I only have the one far to the right, which is for flushing through the coolant passages I think.

Actually, the inlet neck on my engine only has the outlet for the heater and for the lower radiator hose. Not that third small one you talk about. So, is that a 15NPT fitting that is needed there then? As for my block, it is an F54 block, so I do have the lower plug on the block. If I use this as inlet for the circuit, then I'll need a restrictor there? Or maybe the transition to -6AN is restriction enough? Any idea of what fitting I'll need for the block plug opening? Any ideas on the oil-fitting for the original T I am talking about?

Sorry for falling totally off here. Obviously too long sentences and too much english too late at night. Hehe. There is only ONE thermostat housing, isn't it? As you are talking about the upper and lower. Or do you just mean the lower part of the T-housing, thus were I have already put one end of the puzzle so far? Is "the top of the water inlet" you are talking about the same as where the lower radiator hose goes? As I have long ago ditched the circuit for the cold start aux air valve etc, I will need new fittings, and I will be using a -6AN line for the turbo cooling. So what size adapter fitting will I need that goes into the threaded part of the lower water inlet neck on the engine? And as I am not using the heater core in the car, must I have a coolant line that goes from here to the inlet on the head as well? If soo a T-piece will be needed, with one outlet for the turbo cooling and one that goes to the head inlet. Any ideas on which size the oil-fitting I am talking about must be? I need a male -3AN to (I don't know what) adapter that connects my -3AN oil supply line to the stock 280ZXT T-piece that goes into the block and which the oil pressure sender mounts to. Ah, this is so confusing. Had only english been my primary language.

Since I have an aftermarket intake manifold, I don't have this webbing. Is a heat shield thus needed?

I'll check the length needed when I get home today. Does anyone have an answer as for which size fittings I need for the various inlets/outlets?

Hmmm.. From what I can gather from the links, they talk about the threads in the BLOCK being 1/8 BSPT. I am wondering about the size of the top plug in the factory turbo "T". 1/8 inch is the diameter of the plug right? NPT and BSPT is the thread size. But an 1/8 inch fitting has too small of a diameter to fit in the turbo tee, it just sits there losely. It looked like 1/4 inch diameter is correct, from a 1/4 NPT to 6AN adapter I have. But the threading was wrong. Do you know what size the fitting going into the water outlet neck or the head outlet is?

I know I was told earlier that I should buy 1/8 NPT, so that's what I bought from ATP-turbo. But as one can see on this photo: http://album.hybridz.org/showphoto.php?photo=14198&size=big&cat=recent&limit=recent That fitting is too small. I tried with a 1/4 NPT plug I had, and that was almost the right size, except the threads were to big. So I don't think 1/8 BSPT can be right? Anyone else knows what size fitting I need here? Also, I need to hook up the coolant lines for the turbo. One I am going to couple onto the thermostat housing, as you can see on this photo: http://album.hybridz.org/showphoto.php?photo=14199&size=big&limit=recent Should I couple the other line onto the cooling-outlet on the head(The one covered up): http://album.hybridz.org/showphoto.php?photo=14196&size=big&limit=recent Or onto the small threaded outlet on the water neck? http://album.hybridz.org/showphoto.php?photo=14197&size=big&limit=recent And what size fittings are needed for the different locations? I am not going to have the coolant lines from the engine going into the cockpit, as I won't install the heat exchanger etc in the car.