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Discussion Starter #1
i just need to know all the stuff i need to take off the turbocharged 300ZX to make my 86N/A turbocharged! If someone can give me a list or direct my to a URL so i can get it then that would be very helpful! I ALREADY HAVE A TURBO OFF OF A 84 300ZX! THANX FOR YOUR HELP!



Post Edited (Nov 11, 4:25am)
 

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Or just take the whole engine thats going to be the easiest way--Do the whole swap!! Its the best way--I've talked lots of people that have taken the N/A Engine and put turbo into it and they we're as happy with it as someone who did the actual swap... The inside of the turbo engine is differnet from the internals of the NA
 

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You need to be quiet. You're posting stupid, bad, wrong information.

The only difference internally between the NA and turbo engines is the pistons. That's it, that's all.

And a boosted NA engine will make more power at the same boost levels than a stock turbo engine.
 

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The downside is you have to have a bigger intercooler or higher grade fuel to run the same amount of boost as you would on a turbo engine. At say 15psi, you're going to knock way sooner on the NA block than the turbo, therefore you'd need a bigger intercooler, and higher grade fuel, such as adding octane booster to your tank or something. Or you could just run lower boost and keep the more moderate intercooler and 93 octane as you could in a turbo block.
 

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How to Make a Non Turbo Engine a Turbo From our friends at Z31.com


This article covers the parts and procedures needed to make a non-turbo vg30 a turbo. It does not include the 88 and 89 engines, which have a smaller turbo and higher compression. This process takes a lot of time and some specialized equipment. This should be considered before the project is started. Many people decide to sell their NA and buy a turbo car. This would be advised if you don’t think you can handle the conversion. If you can obtain an entire turbo engine then your job is much simpler. This write-up will explain the pieces necessary to convert the non-turbo engine, and then how to transplant the completed engine into your car.
The main difference between these engines is the compression. This is addressed by using lower compression pistons. These can be obtained from a turbo engine, or you can invest in aftermarket forged pistons if you plan on making a seriously powerful engine in the future. The other differences in these engines are as follows:
1) Detonation sensor – This is a safety device and is not necessary. It can be used, but the engine will run fine without it. In order to use it you will need the turbo wire harness for the engine compartment.
2) Pop off valve – This is an emergency pressure relief valve that is screwed into the intake manifold right near the “V” on the cover plate. Your NA (naturally aspirated) should have a plug in there right now. If you would like the added safety of the POV then it will bolt right in. Be advised, it will vent intake pressure to the atmosphere if the boost goes more than a couple psi above stock. So if you plan on turning up the boost then you will either have to modify it to open at higher boost, or keep it plugged.
3) Auxiliary air control valve – This device is what the turbo cars use to control the idle. The NA’s use a FICD or fast idle control device. This is located on the passenger’s side of the intake plenum. To use it you will need the engine wire harness.
4) Wire harness – this is only required if you decide to use the AAC, detonation sensor, or both.

Parts you will NEED

1. All intake plumbing from a turbo car.
2. The driver’s side engine mount bracket (bolted to drivers side of turbo engine block. This is needed to clear the turbo. (you will understand it when you look down there)
3. The front crossmember from a turbo car. This is required to clear the turbo and line up with the turbo engine mount bracket.
4. Steering rack bolts and brackets. This is the hardware that holds the steering rack to the crossmember. The bolts and brackets are much larger on a turbo. Im sot sure exactly why they are bigger, but the NA rack will bolt right up to it provided you use the turbo bolts and brackets. You can also expand the holes on you NA brackets if you can’t get the turbo ones.
5. Of course you will also need a turbocharger! Grab one from any pre 88 turbo car. Be advised, the 84’s had oil cooled turbos and were more prone to failure than the 85-87 water-cooled turbos.
6. You also need the drivers side exhaust manifold. It will mate up with the NA’s crossover pipe with no problems.
7. Turbo injectors have a larger flow rate over the NA injectors. These are required, as the NA injectors will max out very quickly with the higher fuel demands of the turbo engine.
8. The engine computer is important as it controls the injectors and needs to know the size of them to control the mixture properly. It is very important to have turbo fuel rails from the year computer you are using. If you get an 87-turbo computer, then get injectors/fuel rails from an 87 turbo. Certain years may be compatible, but if they are not then the fuel pump will remain on and the pressure will not be correct. It is easiest to get fuel injectors used and fully intact on their rails from a turbo parts car.
9. The oxygen sensor has to match the computer. If you have an 85 and need to use an 87 computer then you will need an 87 O2 sensor. The 84-85 are the same, the 86 has its own, and the 87-89 are the same.
10. If your alternator is on the drivers side then it will need to be moved to the passengers side to make room for the turbo. This is quite easy, it only requires the turbo alternator bracket and tensioner. Just grab these from a turbo car and bolt them on. The alternator wire harness may not reach across, so you might have to extend it. A different belt may also be required. The number is a 17395. That’s the belt you need. Just a note, the AC bracket on the NA car doubles as the alternator bracket. This may get in the way of the intake pipes that go through there, so you MAY need to use the bracket from a turbo car.
11. Also grab the metal water hose that crosses the front of the engine. The NA one can be made to fit, the only difference is the way it bolts to the block. If you can grab it, it makes life a bit easier.
12. You will need the downpipe that goes from the turbo to the catalytic converter. It will bolt right in.
13. The turbo oil pan has a nipple on it for the turbos oil return line. You will need either the oil pan, or have a piece welded on.

Other Information

Now that you have everything you need I will try to explain everything else you will need to do to make this work, and address any other problems you may encounter.

-The NA transmission can be used, but it is not as strong as the one from the turbo.
-The clutch will also not be as strong and may not hold if you turn up the boost.
-The upper intake pipe has one less hole on the turbo model. On the NA’s this is the return for the crankcase ventilation. It is now routed to the metal S pipe that goes between the airflow meter and the turbo.
-You will need to route engine coolant to the turbo if you used a water-cooled turbo. The coolant lines that attach to the throttle body can be removed and spliced into. All you would need for this is coolant hose and some clamps.
-If you need to change the oxygen sensor to a different year then it may need the adapter for that year. The adapter is a 1 1/8 inch plug with a threaded hole in the middle for the sensor to fit into. It can be a pain to get this plug out, but all you need to do is use the adapter from the year of the o2 sensor you are using.
-Turbo cars have an injector cooling fan. Most people seem to think it is worthless. I have no factual information on this topic, but it can be installed if it makes you feel more comfortable. The wires are there on the NA harness so all you would have to do is bolt it on and plug it in. I am not using one right now and don’t plan on it.
-Im sure it would be a very good idea to install some of the heat shields from a turbo car.
-The oil pressure line for the turbo attaches to the engine block. On the NA block the hole is there but it is plugged. It is located on the front of the block on the drivers side.85zx wrote:

> Id like to turbocharge my 85 NA except that I get enough
> speeding tickets as it is :(
 
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