What Engines Will Mount to Our Transmissions?
05-22-04, 08:48 AM
#1
Senior Member
Thread Starter
What Engines Will Mount to Our Transmissions?
Besides a rotary, what engines will bolt to a 5-speed from an FC?
Someone told me the Miata 4cyl will fit. Is that true? If so, what years?
Anything else?
Thanks,
-Jason
Someone told me the Miata 4cyl will fit. Is that true? If so, what years?
Anything else?
Thanks,
-Jason
05-22-04, 04:55 PM
#5
Old [Sch|F]ool
Miatas used the same transmissions as N/A's, for 5 speed anyway.
Swapping involves removing the front transmission housing (there is no separate bellhousing) and swapping it for one for the appropriate B-engine pattern housing.
But why? The Miata trans has closer gearing, and is the same strength as the RX-7 (N/A) tranny. Better to put the Miata gearset behind a rotary.
Many Fords (light trucks, some T-birds?) used Mazda transmissions, allegedly based on the ribcase (RX-3/4/5/Turbo II/FD), but I don't think they had removable bellhousings. Need more infos.
Swapping involves removing the front transmission housing (there is no separate bellhousing) and swapping it for one for the appropriate B-engine pattern housing.
But why? The Miata trans has closer gearing, and is the same strength as the RX-7 (N/A) tranny. Better to put the Miata gearset behind a rotary.
Many Fords (light trucks, some T-birds?) used Mazda transmissions, allegedly based on the ribcase (RX-3/4/5/Turbo II/FD), but I don't think they had removable bellhousings. Need more infos.
05-22-04, 05:16 PM
#6
Senior Member
Thread Starter
Good info. Thanks.
The reason I ask is because I am thinking about buying another RX7 with a blown motor and dropping in a cheap, fuel efficient, 4cylnder.
I want a fuel efficient, RWD daily driver. Everything in that category is either expensive or ugly as hell (i.e. Miatas)
What year Miatas have the same rear section? Because If the rear section is the same, I could use an RX7 cross-member and the shifter and drive shaft would line up right. Then it is just a matter of fabbing a cradle or motor mounts. (assuming the engine clears the firewall)
Sound feasible?
The reason I ask is because I am thinking about buying another RX7 with a blown motor and dropping in a cheap, fuel efficient, 4cylnder.
I want a fuel efficient, RWD daily driver. Everything in that category is either expensive or ugly as hell (i.e. Miatas)
What year Miatas have the same rear section? Because If the rear section is the same, I could use an RX7 cross-member and the shifter and drive shaft would line up right. Then it is just a matter of fabbing a cradle or motor mounts. (assuming the engine clears the firewall)
Sound feasible?
05-22-04, 08:47 PM
#7
Old [Sch|F]ool
None. FC's use a unique rear tranny mount/shifter location. I believe all Miatas use the power plan frame setup (the front of the diff and the rear of the engine/tranny assembly support each other via a truss, and the whole drivetrain assembly hangs off of the motor mounts in the front and the rear diff mounts in the back - there are no tranny mounts per se)
What you'd do is get the Miata drivetrain, swap the FC tailhousing onto it, and go. You will of course have to fab motor mounts, possibly make a new oil pan and pickup tube, (nothing really out of the ordinary for an engine swap) but at least you wouldn't have to worry about fabbing new clutch linkage/rear crossmember/driveshaft.
This of course is assuming starting with a N/A car.
I'd almost want to consider a B2200 engine/trans, if they made them EFI. The F-series four is very long lived and torquey as all hell. Good for a heavy car like the FC. And then there are the turbo versions of that engine as used in the MX-6/626/Probe.
Or then again there is the Kia Sportage engine, which is a formerly Japan-only DOHC F-series. Engine with a ton of potential, apparently you can use it with a 1.6 Miata ECU... well I'm getting beyond my experience here, Randy Stocker's website at http://members.aol.com/solomiata has a wealth of info on various Mazda engines and transmissions, including the engine used in the Sportage.
What you'd do is get the Miata drivetrain, swap the FC tailhousing onto it, and go. You will of course have to fab motor mounts, possibly make a new oil pan and pickup tube, (nothing really out of the ordinary for an engine swap) but at least you wouldn't have to worry about fabbing new clutch linkage/rear crossmember/driveshaft.
This of course is assuming starting with a N/A car.
I'd almost want to consider a B2200 engine/trans, if they made them EFI. The F-series four is very long lived and torquey as all hell. Good for a heavy car like the FC. And then there are the turbo versions of that engine as used in the MX-6/626/Probe.
Or then again there is the Kia Sportage engine, which is a formerly Japan-only DOHC F-series. Engine with a ton of potential, apparently you can use it with a 1.6 Miata ECU... well I'm getting beyond my experience here, Randy Stocker's website at http://members.aol.com/solomiata has a wealth of info on various Mazda engines and transmissions, including the engine used in the Sportage.
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05-23-04, 07:44 PM
#8
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Originally posted by eyeoutthere
Good info. Thanks.
The reason I ask is because I am thinking about buying another RX7 with a blown motor and dropping in a cheap, fuel efficient, 4cylnder.
I want a fuel efficient, RWD daily driver. Everything in that category is either expensive or ugly as hell (i.e. Miatas)
What year Miatas have the same rear section? Because If the rear section is the same, I could use an RX7 cross-member and the shifter and drive shaft would line up right. Then it is just a matter of fabbing a cradle or motor mounts. (assuming the engine clears the firewall)
Sound feasible?
Good info. Thanks.
The reason I ask is because I am thinking about buying another RX7 with a blown motor and dropping in a cheap, fuel efficient, 4cylnder.
I want a fuel efficient, RWD daily driver. Everything in that category is either expensive or ugly as hell (i.e. Miatas)
What year Miatas have the same rear section? Because If the rear section is the same, I could use an RX7 cross-member and the shifter and drive shaft would line up right. Then it is just a matter of fabbing a cradle or motor mounts. (assuming the engine clears the firewall)
Sound feasible?
05-23-04, 07:49 PM
#9
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[QUOTE]Originally posted by eyeoutthere
[B]Good info. Thanks.
The reason I ask is because I am thinking about buying another RX7 with a blown motor and dropping in a cheap, fuel efficient, 4cylnder.
I want a fuel efficient, RWD daily driver. Everything in that category is either expensive or ugly as hell (i.e. Miatas)
What year Miatas have the same rear section? Because If the rear section is the same, I could use an RX7 cross-member and the shifter and drive shaft would line up right. Then it is just a matter of fabbing a cradle o
[B]Good info. Thanks.
The reason I ask is because I am thinking about buying another RX7 with a blown motor and dropping in a cheap, fuel efficient, 4cylnder.
I want a fuel efficient, RWD daily driver. Everything in that category is either expensive or ugly as hell (i.e. Miatas)
What year Miatas have the same rear section? Because If the rear section is the same, I could use an RX7 cross-member and the shifter and drive shaft would line up right. Then it is just a matter of fabbing a cradle o
05-26-04, 07:51 PM
#15
Old [Sch|F]ool
By B I meant
B3 (1.3l, Festiva/Aspire), B6 (1.6l SOHC/DOHC/DOHC Turbo), BP? (1.8l DOHC/DOHC Turbo).
All rotaries from '74 to present have the same bolt pattern. It's just called "rotary" bolt pattern, not A or B or whatever.
B3 (1.3l, Festiva/Aspire), B6 (1.6l SOHC/DOHC/DOHC Turbo), BP? (1.8l DOHC/DOHC Turbo).
All rotaries from '74 to present have the same bolt pattern. It's just called "rotary" bolt pattern, not A or B or whatever.
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