Would anyone be able to tell me a ballpark figure for the cost to turbocharge my 13b decomp in my s2 rx-7? The setup i'm thining of, fuel injected and running relativly low boost so does't have to be intercooled.
Thanks.

 

By decompressed I assume you mean with the T2 (turbo) low compression rotors already in it, correct?

~T.J.

 

yeah.

 

Ok, well in that case, to run a bare bones turbo setup as youre describing, you would need to get a hold of a turbo exhaust manifold that will clear your steering column (assuming you have RHD), as well as a turbo. The stock 2nd gen turbo would be great for you as its essentially being put on the engine it was designed for. You could probably have a turbo manifold custom made for the turbo flange and to clear the steering column if theyre hard to come by down there or something. After you have that, youll need a downpipe. This is simply the pipe that goes from the turbo to the rest of the exhaust which will also most likely have to be custom made with larger pipe since this is a turbo car now. The downpipe will most likely have to be custom built as well if the manifold is custom built. So, from there, you need to work on the intake side. Get yourself some tubing welded together of some sort to go from the turbo into the intake manifold. Then, you just need an air filter on the turbo inlet.

Thats the easy part. Im not too sure about using "stock" parts for the fuel system and what all, so I may be wrong here (as well as other areas ). Youre gonna need a fuel pump strong enough to supply your base FI rail pressure, plus the boost pressure (or something like that), and flow enough volume for it all. To figure this out, you need to know what size injectors youre running, what rail pressure, and what duty cycle they will be running at. After you figure all that out, you can determine how much fuel your pump is going to have to supply. You may also need a Rising Rate Fuel Pressure Regulator. This just brings the fuel pressure up when youre turbo boosts. This is a pretty generic part, and just about any RRFPR for a FI car should work. Now that you have the fuel system figured out, you need a computer to control it. Commonly this is done with an aftermarket computer, but it can be done with stock computers as well (like the T2 computer since you have the 2nd gen engine already). I dont know what would work how here, so someone else is gonna have to cover you there.

So, heres a breakdown of the basic parts you would need from what I can think of:

Turbo & intake filter
Turbo Manifold
Downpipe
Exhaust - incl. mufflers
Intake pipe & couplers
Larger fuel pump
RRFPR
ECU to control it all

Basically, you may or may not know everything I just told you, but if you just go through, make a list of the parts youre gonna need, and then price them out yourself, you can get your answer. I know nothing about parts availability or costs down there, so your guess is as good as mine as far as how much it would all cost. As I said, this info may or may not ber "right" or whatever, but its what I know to the best of my knowledge, but at any rate I hope it helped some.

~T.J.