HFpower

Any one had this done? I am looking into it. The Mech at corksports says he can have it set in and running for 2.5k give or take 200.. What you guys think? I know i will be replacing more after i do this but what you think will come first? Any warnings? Thanks

gamble302

well from what i hear the j-spec 12at's arent as good as far as the motors themselves go, but they do have cool dizzys and the cool factor is there. no intercooler is bad, plus the turbos are tiny. id say for 2500 youd be better off getting a TII turbo and manifold on there and fabbin up a fmic and piping, and maybe gettin a beefier tranny and a few other mods.
gamble

HFpower

The 2500 would include an fmic and fuel managment equipment. I am not sure what. The intercooler is off a starling is what i think he said. What do you mean by the motor isnt good? Is it any diferent then the NA 12a besides rotors? From what i have read 12a's can run a good 150-180k miles if you take care of them. Add a turbo and you lose reliability and all but. The car already has a blown motor so i dont have anything to start with. Rebuild NA 12a or pay 600 more and get a turbo 12a with fmic? hmmm. i have to think and save money...

gamble302

well hell if thats 2500 for everything including them putting the motor in, go for it.
be sure and post lots of pics of everything all setup for us

HFpower

Oh how i wish i was doing this tomorow. I am just looking into it now. Going to look at the car tomorow. Guy wants 500 so i will offer 400.. If i do this it will be done by january at the latest. I so hope i can do this. Oh well wish me luck. Any other opinions are taken please keep telling em what you thinm or if you find any info about this give me a ring. thanks

Adsy01

I had a J-spec 12aT in my '82 S2 it was a very easy conversion, i added a TII intercooler that was front mounted and the compressor wheel ans housing from a TII turbo on to the orginal 12aT turbo..

theres a bit of info on my site (link below) but if you wanna know more detailed stuff just holler.

setzep

If you can get a turbo FB together for 3k that would be awsome to say the least! I'm about 2-2.5k away from having a running/driving turbo FB and I've already put in a little over 5k in to it.

PaulFitzwarryne

If I get the story, right you are just about to speFirst this nd 4400 on being a 85gs with a blown motor, and are seeking advice on wether to spend another $2,500 having the engine replaced with a second hand Jspec 12at from Corksport.

First do a search on 12at on this forum and you will get the for and against the engine. The EFI is crude, the turbo and ports small while the output can easily be obtained in a stock ported NA 12a. However Corksport has a good reputation and the transplant could be a reasonable starting point if you are going to add real performance later.

The first question is whether the $400 car is a worthwhile starting point. Is it in good condition? Rust? Brakes? etc. Spending $2500 on a blown motor could be seen as rather an overkill. Even keeping with the 12a you have a wide range of options from a secondhand 12a at $500 to a full rebuild and porting.

For the same money you could go 13bt and have an engine which is much younger and reliable plus more power. But your first task is to decide whether the car is in such a condition that it justifies the expenditure. Think what you can get with $3,000 possible a very good RX-7 on which someone else has spent money getting a good performance.

HFpower

Problem in looking for a built 1st gen is that no one in oregon has spent the time to put a nice one together in my price range. There is one for 9k but that is not obtainable by me at this point. I am looking for something that i will be able to invest in over time to becaome a real car. From what i have heard the car has no rust, brakes are good and tires have 75% tread. the car only has 120k which is alot but not totally unreasonable. I have thougth of using the NA 12a and have it ported but at that point to get the power from the port i would ave to purchase a new exhaust, carb and other mods. Everyone knows power is much easyer obtained by turbos. I have alot to think about but it seems to me that the 12a T is the way to go.

Get the motor in and have it run. I will get a good amount of miles out of the engine befor i blow i hope and at that point i will have th money to rebuild it and port the turbo motor. Then i will be looking at the higher power areas. Either way i am looking at a huge project tyo start with only 3k... Keep giving me info and thoughts.. The more the marrier...