Ok i have done some seriously thinking, and i want to get a J-spec 13BT. I have always wanted a turbo,and i think this is the best way to get one. I have the neccesary tools and my dad is a mechanic. I will probably go with a stand alone computer like haltech and get some new exhaust, and a front mounted intercooler or a TII hood. I already got drivetrain so i think im in good shape. My stock n/a block has got 141,000 on it, and i figured im not going to be able to get much out of it, so instead of wsting money on bolt-ons, im going for the big-bang. I have heard lots of discussion about this and i guess RotaryMan has got one. I need some advice and pointers. And what about the wiring harness? I want to hear some of ppls **** ups so i don't make same mistake. https://www.nopistons.com/forums/pub...#>/biggrin.png

You'll only need the wiring harness for your windshield wipers, cruise control, and water temperature gauge. The rest of the harness can be removed if you feel like taking it apart. Most standalones can be had with a harness for all of the sensors, injectors, etc.

What about my fuel pump, will i have enough fuel pressure?

You could always go with a TII fuel pump. The Supra pump is pretty good. I have it.

What are you going to put in. Are you putting an 89+ Jspec in an 86 to 88 rex? Or are you putting a 87/88 jspec in an 87/88 NA? This will make a big difference( as I have now learned) as to how much work is involved. You will need to get a better fuel pump then the NA, I'm using a stock 3rd gen one...so we'll see how well it goes..I should have my '88 SE GT-X( :smilewinkgrin: ) up and running in a few days now...and I'm making a new website dedicated to the transplant process...if you have any specific questions or concerns, just let me know.

What kind of problems did you run into with your car? Do you know if it is a big bitch to put a 89 - 92 engine on a 87 - 88 tranny? https://www.nopistons.com/forums/pub...#>/BURNOUT.gif

I'm using an 87-88 TII transmission with an 89-91 TII motor. Both motors have the same bolt pattern.

I would like to go with the 89-92 block. yah and what about my 88' tranny, thats really the factor. And did u get any goodies w/ your jdm block,( like they say on webpage)?

:wow: i c u answered Q on tranny, my post was couple seconds after yours. :notify:

With my experience in this...its normally been the case that you'll need the same year tranny as you will motor...but I'm sure you can make the 88 T2 tranny bolt up, I just swapped out because the NA tranny I had was only good for about 250HP...which my T2 will be pushing more then that! I will put the link up to my new page shortly...it should answer many of your questions....

HURRY! too many q's not enough answers, and plus i forget half on them when im at school or work, AH! Ur link will be #1 on my favorites https://www.nopistons.com/forums/pub...DIR#>/wink.png

BTW...no, I didn't get any goodies w/ mine, lol. However, I did get a burnt up clutch, and a nasty intercooler....The clutch I have already taken care of thanks to the guys at centerforce, but the intercooler is staying until I can get more $$$ for a front mount....

Oh! I guess they forgot to say the other side of the stick, the baddies! What a couincidence!( I can't spell)

I hate to say it, but I'm not able to link to the page tonight...its only letting me update the main page and its past midnight...and I've got work to do in the morning, lol...sorry man. I'll get it up though..promise https://www.nopistons.com/forums/pub...DIR#>/wink.png

The 87-88 tranny has slightly better gear ratios than the 89-92, but the 89-92 engine produces more hp. I would like to put a 89-92 engine on a 87-88 tranny.

This is for 1988......



Drivetrain Specifications:

5-Speed TurboII Ratio



1st

3.843



2nd

2.015



3rd

1.391



4th

1.000



5th

0.762



Reverse

3.288



Final Drive

4.100



This is for 1990............



Drivetrain Specifications:

5-Speed TurboII Ratio



1st

3.843



2nd

2.015



3rd

1.391



4th

1.000



5th

0.756



Reverse

3.288



Final Drive

4.100

https://www.nopistons.com/forums/pub...#>/BURNOUT.gif

**** now that I look at it the only diff. is with 5th gear, and not by much. I guess I'll just go with all 89-92 ****. :thumbsup:

hey RotaryMan88,



How much was your shipping cost? And how long did it take to get, and put in?

My shipping cost was about $195 from CA to VA, and that was for both the motor and tranny. I can't exactly say how long it took...its still not done yet, lol. I've gotta finish my exhaust, dash harness, MAF, fuel pump...and a few little hoses...then I should be able to start it. I started this back in the first week of October, and I'm about 5 days away from turn key driving again! There have been many snags in my process...with finding parts and affording them, lol. If you have the right tools, the right time, and the right parts...it can be done in a weekend.

What all parts were needed? And what parts couldn't u find?

Dash Harness Well, those of you going from 88 and older to an 89+ T2 will need a 89+ Dash harness. The 88- one won't plug into the 89 T2 ECU. The dash harness doesn't have to be turbo. Cost is about $100

Throttle cable Well, like me, many of you will go with a J-Spec motor. The problem is Japanese cars have the throttle exit on the right side of the car, thus the throttle mounts to the right. On A-spec motors, the throttle mounts to the left. You can bring the cable around the front of the motor and mount a bracket that will allow the cable to connect to the right side of the TB. Cost is about $5



Ok, will i need the dash harness from a T2 if i get a haltech?

And whats up w/ the throttle body thing im confused

:dontgetit:

get a haltech your car will thank you later with more power and running better. you shouldn't need the dash harness with haltech....i could be wrong though

get a haltech your car will thank you later with more power and running better. you shouldn't need the dash harness with haltech....i could be wrong though[/quote]

Yup, no need for changing the harness.

So the haltech also gets rid of the rats nest to ( all the **** under the intake). What about all those vacuum hoses connected to the rats nest, are those all emissions? Could i scrap them right now? I could just run the fuel lines directly to the fuel rails and i already got rid of my egr so what the hell are all those vacuum hoses and solenoids for? I know one solenoid is for the egr what about the other three?

If i switch to a series 5 engine when i get the J-spec, will i still need the airpump to activate the 5th & 6th ports and the VDI if i go w/ haltech?

Will all the radiator hoses and fuel lines match right up with the series 5 J-Spec?

Yes, you can get rid of all of those emmissions solenoids. All of the water and fuel lines will match up. There aren't any J-Spec NA motors.

Yes, you can get rid of all of those emmissions solenoids. All of the water and fuel lines will match up. There aren't any J-Spec NA motors.[/quote]

little confused, so right now, without the haltech i can get rid of all that ****?? So i just capp off all the vacuum nozzles, the one on the secondary feul rail, and like 3 on TB and 2 on intake.

Yes, you can get rid of all of those emmissions solenoids. All of the water and fuel lines will match up. There aren't any J-Spec NA motors.[/quote]

little confused, so right now, without the haltech i can get rid of all that ****?? So i just capp off all the vacuum nozzles, the one on the secondary feul rail, and like 3 on TB and 2 on intake.[/quote]

Yes, you should be able to get rid of it all if you have an 86-88 motor.

I do have an 88 motor. I asked my local RX-7 mechanic and he said that some of those control high idle speed and cold start. He said that it would probably not run. Has anyone ever done it? Im probably not going to becuz there are no benefits, and once i put it back together i don't want to have to take it apart. But thanks for info

I don't have any of that stuff, and my car runs well, but I would say you're better off keeping all of it.

I don't have any of that stuff, and my car runs well, but I would say you're better off keeping all of it.[/quote]

decided to trash it https://www.nopistons.com/forums/pub...IR#>/smile.png And ya it starts and runs, but until i replace this bolt and seal up that vacuum leak i won't be able to tell u if it runs well.

- I'm going to try and get started on this conversion and was wondering if i could drop a FD fuel pump or some other aftermarket pump in my car right now, as i will need to get one anyway in future for boost. Would that make my 7 run rich? In the future i'm planning on going w/ haltech, but wondering if i could drop in now and save some time. What determines how much fuel gets in anyway? Right now i still have stock 460cc's on there, i don't think putting a bigger fuel pump w/ more pressure would allow and more fuel to get in, right?

Doesn't the injector size determine how much fuel get in? ofcourse assumming u have enough fuel pressure.

I don't have any of that stuff, and my car runs well, but I would say you're better off keeping all of it.[/quote]

decided to trash it https://www.nopistons.com/forums/pub...IR#>/smile.png And ya it starts and runs, but until i replace this bolt and seal up that vacuum leak i won't be able to tell u if it runs well.

- I'm going to try and get started on this conversion and was wondering if i could drop a FD fuel pump or some other aftermarket pump in my car right now, as i will need to get one anyway in future for boost. Would that make my 7 run rich? In the future i'm planning on going w/ haltech, but wondering if i could drop in now and save some time. What determines how much fuel gets in anyway? Right now i still have stock 460cc's on there, i don't think putting a bigger fuel pump w/ more pressure would allow and more fuel to get in, right?

Doesn't the injector size determine how much fuel get in? ofcourse assumming u have enough fuel pressure.[/quote]

An FD fuel pump would do ok, as well as a TII pump. You should be fine with the 460's for now.

well i want to put in a pump that will be good for my GT-X conversion too. I just wanted to know if all the extra fuel pressure would make my car right now w/o boost run rich.

It may run a little rich. I'm using a Supra pump with good results.