RX7 engine swaps

I'm thinking about what I want to do about the blown engine in my FC. If I did an LSx I'd just buy a Corvette. Will an NB Miata engine fit? Or an NC MZR?

I think Ford 2.3Ts were a common swap back in the day.

Granny's Speed shop has everything you need to bolt in a Ford 5.0; do you not want an LSx specifically, or are you avoiding V8s altogether?

20B will fit, but good luck tracking one down

If I remember correctly the Miata's bell housing pattern is the same as the Rotary's but the input shaft is 1/16th longer on the Miata transmission. I honestly don't think that would hurt anything, and it may be attributed to the person doing the measuring... but I believe some of the guys on the Locostusa forums were talking about mating the two together with almost no effort (but I've slept since then so I'm a bit foggy on the whole subject) and of course we all know that bolting them together is just beginning of the headache.

actually now that I think about it... (here comes a bunch of "if" statements)

IF the bellhousing on the transmissions are the same then that means that any engine swap done in a Miata can be done in a FC right? So that means, IF someone put a Jaguar V-12 in a Miata, then you could put a Jaguar V-12 in a FC! Right?

http://www.youtube.com/watch?v=MeZWxZqcVug

but If V-8 was your thing I'm sure you could save a ton by buying any old legacy SBC and still get good power out of it.

Ok, thats the end of anything helpful on the subject, I'm only going to state opinions from here on:

Man, I'd really hate to see a piston in that second gen. Although rotary's are far from perfect, they do have a their potential. Not to mention there's a lot of enthusiast groups to offer help and they tend to be pretty passionate about that motor (if not, a bit misguided sometimes). Why not spend the money on a rebuild, a turbo motor swap, or a renesis swap? The rotary engine rebuild I did for my FC was by FAR my favorite rebuild :) I'm tellin ya, you'll never feel more a part of your car afterwards.

Good luck.

1uz-fe
3vz flywheel with PCD massaged
home made adapter plate
megasquirt efi

an insurance plan that can buy you new legs when the flywheel explodes

Sounds like it's time to make an "MX7."

B2200 bell housing, RX7 trans, F2t.

http://s869.photobucket.com/albums/ab256/aussiesmg/RX50/?action=view&current=007-1.mp4

Details on performance and economy please!

Oh yeah, and the Kiwis have a 4-rotor kit for a cool $9k too...

http://kiwi-re.com/wwd_showroom_cat10_2.php

Taiden wrote: Details on performance and economy please!

93 5.0 with Trick Flow heads, roller rockers, aluminum flywheel, Holley Systemax, BBK long tube headers, remote oil filter mount and external oil cooler, aluminum rad, electric fans, Moderate cam, 7 quart pan, Cobra Clutch and T5 trans. Much more I haven't thought of now.

350hp, 325 ft lbs, 20 lbs heavier than stock, redline 6500.

Fun factor... outrageous.

As for economy.....never thought to check it.

Is your accessory belt tensioner a female threaded tube with heim joints?

Hungary Bill wrote: Oh yeah, and the Kiwis have a 4-rotor kit for a cool $9k too...

I shudder to think of the rate that that thing consumes gasoline.

Taiden wrote: Is your accessory belt tensioner a female threaded tube with heim joints?

effectively that's just a brace, you can see the tensioner still in the picture

KL-ZE!

Or...

Suzuki H27A since it comes RWD anyways?

BMW Inline 6. Why? Its different. They are cheap, sound cool, are tourqey and they run off the factory harness with out to much fiddling.

Excellent, lots of activity!

pimpm3 wrote: BMW Inline 6. Why? Its different. They are cheap, sound cool, are tourqey and they run off the factory harness with out to much fiddling.

That's actually pretty cool looking. I have three or four 5.0 (and one 5.5) engines in various states of tune and running condition. Just really not quite ready to go that far and I haven't seen one on the track. Although I could almost guarantee it would turn better than a Mustang, at least. Anyway, nothing against the LSx in particular. I have an LS3 in the driveway in my Corvette. Just thinking a turbo Miata engine would be a cool way to get to the 250hp mark without "affecting the balance of the car" and angering the Mazda gods. If it could hold together.

A M50 with a cam and header should get you low 200's at the wheels and quite a bit of tourque. It was pretty easy to wire as well if you get the whole harness from the BMW. It does way more then a turbo Miata motor....

Canute wrote: Excellent, lots of activity!

pimpm3 wrote: BMW Inline 6. Why? Its different. They are cheap, sound cool, are tourqey and they run off the factory harness with out to much fiddling.

That's actually pretty cool looking. I have three or four 5.0 (and one 5.5) engines in various states of tune and running condition. Just really not quite ready to go that far and I haven't seen one on the track. Although I could almost guarantee it would turn better than a Mustang, at least. Anyway, nothing against the LSx in particular. I have an LS3 in the driveway in my Corvette. Just thinking a turbo Miata engine would be a cool way to get to the 250hp mark without "affecting the balance of the car" and angering the Mazda gods. If it could hold together.

20lbs different weight with the 5.0. I seriously doubt you could tell if it is "affecting the balance of the car"

sr20det to be different=]

the aforementioned f2t would be cool

http://www.rx7club.com/showthread.php?t=930315
alot of custom work involved to do an 2r into an fc....
this guy did some cool stuff with it though

F2T is too tall. The RWD cars that used versions of the F series engine (HC/HB 929s) had much taller cowls.

The F2T sounds a little underpowered by modern standards. I think I'd like a turbo Miata engine if I went small bore. Maybe I should look more closely at my 5.0s. Top my 331 off with late Explorer accessories. Don't know if I want to go distributorless, which would mean Megasquirt, or not. One problem I'd have with the 5.0 is that I have tall valve covers for my 331 so I could strengthen the valvetrain. Which means a tall intake and I hear clearance is already a problem. Maybe I look at other ways of accomplishing that. Can the 5.0 be rear sumped and pushed down and back? I see a lot of cars with huge cuts out of the driveshaft tunnel because the shifter is farther forward. Is that just shade tree work? Would I still be able to do this?

ditchdigger wrote:

Hungary Bill wrote: Oh yeah, and the Kiwis have a 4-rotor kit for a cool $9k too...

I shudder to think of the rate that that thing consumes gasoline.

and oil...

Suzuki H27A since it comes RWD anyways?

Interesting idea since they're used in a P-51 Mustang replica.

No way I'd put a Miata engine in an RX-7. If I'm going to do the work for an engine swap, it's got to be able to make more power than an engine that drops right in (13BT).

Canute wrote: The F2T sounds a little underpowered by modern standards. I think I'd like a turbo Miata engine if I went small bore. Maybe I should look more closely at my 5.0s. Top my 331 off with late Explorer accessories. Don't know if I want to go distributorless, which would mean Megasquirt, or not. One problem I'd have with the 5.0 is that I have tall valve covers for my 331 so I could strengthen the valvetrain. Which means a tall intake and I hear clearance is already a problem. Maybe I look at other ways of accomplishing that. Can the 5.0 be rear sumped and pushed down and back? I see a lot of cars with huge cuts out of the driveshaft tunnel because the shifter is farther forward. Is that just shade tree work? Would I still be able to do this?

Anything can be done to make any combination fit but, as an example, the firewall in mine was clearanced, with a BFH in two small places to gain enough room for the 5.0 heads.

I have the Granny's kit in mine and it makes for a nice simple install. No cuts to the car anywhere.

I have the Holley Systemax II and a 1" spacer, my hood will not clear the intake by less than an inch.

Well, of course you can track it, that's the whole point.