looking into getting a 3rd gen and swap in a 327
I am wanting to try to put a single turbo setup in there for about 6-8 pounds of boost
how much work would it be to get a turbo setup into the car.
what all would I need to do to get something like this to fit?

 

for 6-8 psi you might be better off with a s/c.if you are gonna run 15+ psi,i'd go for a t/c.the s/c would really help the tourqe on the 327 whch is already giving up 23 cubes to a 350 that you could've gotten with the 3rd gen

 

Because the 327 has a smaller stroke it can't mechanically make as much torque as a 350(Force times distance) at the same RPM all things being equal, so you have to rev it higher to make the same power output, and put bigger gears in the rear to get the right torque multiplication. A reciprocating engine's RPM capability is determined by piston acceleration and weight and the strength of the con rod. The acceleration of the piston is determined kinematically by the maximum angle the rod makes from verticle. The only thing after that is how the valve train holds together at high RPM. Higher reving engines need expensive parts to stay together. For my money a tc is better because it uses wasted heat energy from the engine instead of crank power. The simplicity of installing a sc would probably outweigh any performance benefit. I know that everyone does it, but for the money a 350 is the best way to go.

 

I am well aware that a 350 would give me more torque then a 327. I honestly do not care much for a low end motor (look at my current car and you can see why). I am looking for a car that I can set up with good amount of torque but mostly in higher rpm range. I know that a sc would prolly be a easier way to go but with a high rpm motor I would need to worry about over reving the supercharger and the only way to stop that from going on is to lower the boost through most the rpm range. good thing with a turbo is I can run max boost a lot quicker and up higher in the rpm range. now if I was to make a 350 running maybe peak power in the 3000 rpms range yeah sc all the way, but here I am looking for peak power to be in the 5000-6500+ range.
also well aware that I am going to need to do a lot of work as far as the bottom end, and the valve train but I am not putting the motor in right now.. so I have the time to put the thing together.

again though not looking for low end grunt. I am far too used to a high rev motor and I think I can gain more power with it if done right withthe right gears behind it

I am planning on running only 6-8 psi for now but I want to try to make full boost by about 2800 rpms where if I was using a SC the boost would come on a lot slower and full boost if I had a redline of 6500 would rpolly come in around what 5000 rpms? so might put out the same numbers but I am still going to have a lot slower of a car due to the fact that it is not giving me full boost most the time. bu I am planning on making things able to handle around 15 psi during race day.

 

The hard part about running the single turbo is the plumbing.
In an inline motor its no big deal, in a V configuration it become a little tougher.

In you motor both of the exhaust ports are on one side, which makes a single easy to do. On the V8 you have to look at balancing the exhaust from both sides, easiest way to do it would be a similar cross tube in the front of the engine like a Buick Grand National. The problem you run into in the 3rd gen is space.

I assist in the building of RX-7's here in Japan, I know the high revs your talking about. I assume you are going to mate the 327 to a 5 speed...

You never mentioned if you were going to carb or FI the 327 either. This makes a big difference, The 327 is not the same block configuration, and I am by no means a TPI swapper expert but this is an issue you need to address, if your going carb good luck, They dont accept the turbos as well as a FI unit.

you will already have the high pressure system in the Third gen so the instalation will not be too bad if you go with FI. you will also have to look at a upgrade in the fuel system as well, your stock injectors in the RX-7 are 550cc (53 lbs) and you have 4 of these The stock injectors in the TPI are 19 lbs (220cc est.) and there are 8 (of course ) So when upgrading the injectors you also have to look at a fuel management system, either a custom ROM, or aftermarket system. You will also need a way to manage the timing and boost retard (MSD or aftermarket)

These are a few things that come to the top of my head at the moment. Just to let you get your mind churning

TC

 

I know that the plumbing is going to suck. but it is something that I am willing try to work with. if it gets bad though I will switch a twin. as for fuel I am planning on running a haltech setup on the car. so far atleast with the rx-7 and a few other cars they seem to be a really good choice. and that should let me run the retard under boost as well as controll all the fuel and allow me to use big injectors without killing mpg right? well aware that the TPI system is going to a pile of junk if I go with a high rev motor so that is something to be worked out and either going with a miniram or something of the sort. though I do have a friend who is willing wanting to help out on this project andhe is talking about custom intake though not sure about that.

 

well to finish my post
there will be no carb on this motor though. I know it would prolly be cheaper to do but I would rather have the control of a FI system. still need to get a few kinks worked out like as you said space and stuff like that.

I am not driving a slush box ever again if I can help it.
so it is going to be a 5 speed for now

thank goodness I have time to put it all together

but hey htanx for hte help and if you can come up with anything else please let me know

 

I'm still confused as to why you'd want to run a 327 over a 350. A 350 will rev just as high as a 327, but displaces more. I'm not completely sure but, 327 blocks are different from 350 blocks, so bolting up a trans and mounting the engine could be difficult. A 327 also has a two piece real seal which uses the old style crank and needs an older flywheel(1987 and later uses a one piece seal). Finding a good 327 block could also be really difficult. Taking a 350 or a 383 to 6500 is not a big deal. My engine sees trips into that range quite frequently with stock Vortec valve springs(although I probably shouldn't). The 383 my brother is building could probably be shifted at 7000 with no problem. Just my $.02

 

I agree with ATO.
Its much simpler to put a 350 together and very durable in comparison.

My 406 revved VERY quickly to 6500 this past year. I dont think that you would have a problem.

If you just have a hard on for a 327 then go for it.