I have a chance to buy a engine wireing harness and ecu out of a 94 with 25k miles on it. The dude is doing a 3 rotor swap. I can drive the car and do a compression test to make sure the engine is tight.



I want to drop it into my 87TII. I might even wait a few months and do a haltech at the same time.



Has anyone done this swap.



We know that the mounting points are different and aren't sure how to get around it. I think my freshly rebuilt TII tranny will hold up o.k. until I can find a FD tranny.



Anyone done this???

The TII transmission will work fine, but you'll have alot of work to do if you plan on using the FD stock ECU. A standalone ECU would be a better bet. If you can get the engine mounted you'll need to go with a front mount intercooler.

I am just wondering if anyone has actually done this. What other obsticles there are.



I am leaning hard towards a Haltech. I was planning on a FMIC already.

k2rd has done it. its not a bolt in swap, i'm actually not sure what they did to put it in there



mike

yeah its been done. someone on this site has done it but i cant remember who.

There is a RX-7 Mechanic in town that is known for building roll cages for race cars. He is currently swaping a TII engine into a 1st gen. He built his own cross member and engine mounts.



We have already discussed the possibility of doing this and as he said "Anything is possible". The one advantage we have right now is that we have a FC and FD side by side with their engines out (the FD is my Dads).

So we can make measurements and comparisons very easily.



I am going for it. I will work out how I am getting this sucker in there. If the dude thats here with the FD engine in his FC can give any tips that would be cool.



We are not actually going to do the swap for another month or two.

You just need to make a cradle to hold the back of the motor. Some people just weld some thick steel plates to the engine subframe. My friend made a cradle and bolted it to the frame rails...works really well.

You just need to make a cradle to hold the back of the motor. Some people just weld some thick steel plates to the engine subframe. My friend made a cradle and bolted it to the frame rails...works really well.[/quote]

thats probably what paul did too. ive been to the shop a bunch of times, and ive looked at the car but never the mounts



mike

You just need to make a cradle to hold the back of the motor. Some people just weld some thick steel plates to the engine subframe. My friend made a cradle and bolted it to the frame rails...works really well.[/quote]

thats probably what paul did too. ive been to the shop a bunch of times, and ive looked at the car but never the mounts



mike[/quote]

Yeah, that's really the only way to do it.

Does the haltech have knock sensor support?

the new e11 might, but none of the others do



mike

the new e11 might, but none of the others do



mike[/quote]

The Electromotive systems incorporate a knock sensor, but most rotary people don't bother with it.

We looked over the engine bays and the engines on the FC and FD at the shop. I decided to go for it.

I put a deposit on the engine and I ordered a FMIC.

I am now shopping for a Haltech.



Looks like I will have a FD powered FC by the end of October. I am hopeing to get about 350RWHP out of it.

the new e11 might, but none of the others do



mike[/quote]

The Electromotive systems incorporate a knock sensor, but most rotary people don't bother with it.[/quote]

Is that because if you experience any knock, before the computer can do anything about it it's too late on a rotary? :P

You should be very happy. https://www.nopistons.com/forums/pub...DIR#>/wink.png after you get it mounted everything else will be easy.

the new e11 might, but none of the others do



mike[/quote]

The Electromotive systems incorporate a knock sensor, but most rotary people don't bother with it.[/quote]

Is that because if you experience any knock, before the computer can do anything about it it's too late on a rotary? :P[/quote]

Yeah, that's usually the case. I've also heard--never tried it out--that the J&S knock sensor/computer only retards the leading ignition. So the trailing will wind up firing before the leading when it retards the ignition. :o

The mounting of the engine will be hadled by a pro. Like I said he builds racecars from scratch this is a walk in the park for him. Plus he lives for this kind of work - I just made him really happy. He gets to do something cool and pay his bills. He is usually doing fleet maintenance for some of his clients.



I am really looking foward to this. It will be cool to have a really unique car.

that is true. you can set the j&s not to do anything but tell you its knocking though



mike

that is true. you can set the j&s not to do anything but tell you its knocking though



mike[/quote]

Yeah, it has that knock monitor gauge, right?

that is true. you can set the j&s not to do anything but tell you its knocking though



mike[/quote]

Yeah, it has that knock monitor gauge, right?[/quote]

yup, the problem is its still $650ish, and sometimes they wig out for no reason



mike

that is true. you can set the j&s not to do anything but tell you its knocking though



mike[/quote]

Yeah, it has that knock monitor gauge, right?[/quote]

yup, the problem is its still $650ish, and sometimes they wig out for no reason



mike[/quote]

I'll just use common sense. https://www.nopistons.com/forums/pub...>/rolleyes.gif

that is true. you can set the j&s not to do anything but tell you its knocking though



mike[/quote]

Yeah, it has that knock monitor gauge, right?[/quote]

yup, the problem is its still $650ish, and sometimes they wig out for no reason



mike[/quote]

I'll just use common sense. https://www.nopistons.com/forums/pub...>/rolleyes.gif[/quote]

that seems to work....



mike

that is true. you can set the j&s not to do anything but tell you its knocking though



mike[/quote]

Yeah, it has that knock monitor gauge, right?[/quote]

yup, the problem is its still $650ish, and sometimes they wig out for no reason



mike[/quote]

I'll just use common sense. https://www.nopistons.com/forums/pub...>/rolleyes.gif[/quote]

that seems to work....



mike[/quote]

Yeah, but only when you actually use it. :P

I would assume that in this case common sense = lots and lots of fuel?

Clutch!! I am keeping my TII tranny in the car.



I know I will need a stronger clutch. Can I use a FC clutch with a FD flywheel??



BTW - Every custom piece I make will be blueprinted and made in three's. I will be marketing a FD conversion when I am done with this.

My friend used the FC flywheel, but he had to grind part of the FD rear housing off. an 89-91 flywheel can be used with the FD motor, but the 87-88 can't.

I want to keep the FD flywheel and use a FC clutch and tranny.





I have both laying around the shop I'll look tomarrow.

It should work, but I doubt that anybody has tried it.