March 16, 2025, 05:50:42 AM

Author Topic: Darkmx-6's All MAZDA RX7 Engine Swap (F2T)  (Read 3536 times)

Offline DarkMx-6

Darkmx-6's All MAZDA RX7 Engine Swap (F2T)
« on: January 08, 2015, 10:41:32 PM »
I picked up this non-turbo FC RX-7 locally for like $800 blown but running motor. there was some hype about being able to swap the engine out with an F2T from a 88-92 MX-6 using stock parts. So naturally since I have had so many MX-6s and lots of spare parts I thought it would make a good replacement for the rotary.

It is nice to know that people also make 300+ HP on the stock F2T engine. Some even claiming as much as 500

This is when I got it and put it in my garage.
[smg id=7241 type=full align=center caption="Stock FC"]

Want a lift? I can get you one for $2,000 USA plus shipping.

rebuilt the engine.


I decided to use non turbo pistons for the higher compression. 7.8 compression I think is just too low. 8.6 is the non-turbo compression which is still low.




Bought a cam from the carbureted Mazda F engine variant in New Zealand. It has larger (fater) lobes (more duration, more powar o.O)

You can't tell in the picture but I did measure them with a caliper and the lobes are fater.


Removed Rotary engine =' ( sniff  and tranny removed


To make the F2T fit in the RX7 is much like (and not at all like) how marty and turbo yoda put the flat 6 in Gramps using all stock parts.

one major thing needed is how in the world to connect the new engine to the rx-7 transmission.
In comes the b2200 tranny.

Top RX7 bottom B2200

Pretty much all mazda RWD non-turbo transmissions since 1980(probably even before) till some were in the 90's (may be even to the present I haven't researched that far) have parts that are interchangeable.
Bell housings, gears, input shafts, etc. Swap whatever you want.

Rx7 input shaft (top) b2200 input shaft on rx-7 transmission. I know the gear on it doesn't really look the same but the gears on both of them are the same. Just the input shaft is obviously different.


so why b2200? well the truck shares the same block with the F2T. Swap bell housings and and input shafts. and bam. You got yourself a transmission for the F2T with much better RX7 gears that bolts up in the stock location and uses the stock drive shaft. No fabrication necessary. (well almost, you'll see)

Offline N2v8fcs

Re: Darkmx-6's All MAZDA RX7 Engine Swap (F2T)
« Reply #1 on: January 10, 2015, 12:17:55 AM »
Wow...
Interesting
:drive:
new personal best 11.45 @ 120 mph N/A car...9.11 @152 mph for the turbo car.


1987 FC  355 SBC, T-5, T2 rear        retired 5-4-11
1991 FC  383 SBC, sold to Dad. Now 5.3 w 76mm turbo, G-force T-5, 8.8 Ronin rear 
1990 FC  370 CID 6.0 w 88mm turbo, Powerglide, Ronin 8.8 w 3.15 gears


Offline FC3S Murray

Re: Darkmx-6's All MAZDA RX7 Engine Swap (F2T)
« Reply #3 on: November 19, 2015, 11:16:27 PM »
I checked out your mx6 forum, looks like it has been coming along nicely. Your exhaust manifold looks fantastic! Congrats on being "outside the box" with this powerplant swap.

Keep us up to date, I am sure I am not the only one enjoying this thread. Cheers!



13 years of abuse and still running STRONG!

SRM Performance Tuning LLC
https://www.instagram.com/fc3s_murray/?hl=en

Offline DarkMx-6

Re: Darkmx-6's All MAZDA RX7 Engine Swap (F2T)
« Reply #4 on: November 22, 2015, 02:26:17 AM »
Thanks! It's going to be fun!

There are some drift events that are not far from my place that I want to tear it up at. (hopefuly not litteraly lol)