Fantasy Fiero engine swap (Page 1/1)
David Hambleton SEP 29, 09:08 PM
In the mid 1970s I had a dark green Mazda RX2 coupe 4 speed. I thought it was a phenomenal performer.



This is why I'd like to have a rotary powered Fiero:


https://www.msn.com/en-ca/a...-BB19x7g2?li=AAggFp0
cvxjet SEP 29, 09:45 PM
That would be an interesting swap- and, from what I can find online, would cut over 100 lbs off the car's weight! You would need an adapter between the engine and the transmission tho....
fieroguru SEP 30, 07:41 AM
I has been looked at several times in the past.
http://www.fiero.nl/forum/A...090907-2-091370.html
http://www.fiero.nl/forum/A...031229-2-041414.html
http://www.fiero.nl/forum/A...040223-1-035534.html
http://www.fiero.nl/forum/A...060811-2-069942.html

IIRC the exhaust manifold and the passenger axle won't clear each other.
cam-a-lot SEP 30, 08:02 AM
Hey Dave

Cool idea- If you need a motor, there is a shop close to me in Newmarket that has one of these old mazdas and the engine is in running condition

Will OCT 06, 08:57 AM

quote
Originally posted by fieroguru:

I has been looked at several times in the past.
http://www.fiero.nl/forum/A...090907-2-091370.html
http://www.fiero.nl/forum/A...031229-2-041414.html
http://www.fiero.nl/forum/A...040223-1-035534.html
http://www.fiero.nl/forum/A...060811-2-069942.html

IIRC the exhaust manifold and the passenger axle won't clear each other.



Also--and this is the enabling feature that makes V8 RX7 swaps possible--the eccentric shaft in a rotary is higher in the engine than the crankshaft of a piston engine.

In a longitudinal car, this means that the transmission tunnel is tall, and the relatively small Mazda transmission is very high in the tunnel. This means the tunnel is big enough for a large transmission like a T56 to be mounted low in the tunnel, to mate up to a V8 engine mounted low in the engine bay.

In a transverse car, this means that the axles come out of the transmission several inches higher than they would with a piston engine. This may cause problems with the relationship of plunge in the inner CV joints to suspension movement.

OTOH... if you're going to do a longitudinal 4 rotor swap...

[This message has been edited by Will (edited 10-06-2020).]