FD in the FC
FD in the FC
Hey whats going on? I am kinda new to the rotary scene. I was wondering if any body could tell me what it would take to swap a third gen motor into an FC. i have been trying to look around on my own and see if i could find any mounts or anything that it would need but i couldn't find anything so i decided to turn to you guys. If someone could give me a heads up on what i would need to do i would it appreciate it. Oh yeah i also wanted to know some good web sites that have rx-7 parts (suspension).
Dion
Dion
2 Rotors, 1 Turbo
Joined: Feb 2004
Posts: 1,099
Likes: 0
From: Atlanta, GA
Covered in the FAQ too. Basically it says it's very difficult and probably not something you'd want to try.
You could port your FC motor and get pretty close to the FD motor, except you wouldn't have a twin turbo. The main advantage of a twin turbo is that it provides both higher power and low turbo lag. With a single turbo you usually have to choose one or the other or half & half, etc.
Also remember that the FD has a better suspension than the FC. It is both a better type and it's much stiffer. You can stiffen up your FC suspension for improved handling (which you pay for with a bumpy ride), though you can't really change the suspension type. For stiffness you just get new shocks, springs and sway bars. They sell various stiffnesses, just buy your preference and make sure all 3 have about the same level of stiffness. Lighter wheels and tower braces can improve handling without hurting the ride, but the gains are less. So can larger wheels, but anything above an extra inch or two and the added weight could make things worse. Ditto for tires too, but you might pay in the form of cost, low treadlife, poor snow/ice traction, bumpier ride (for narrow "rubber band" tires) and/or slightly worsened gas mileage.
You could port your FC motor and get pretty close to the FD motor, except you wouldn't have a twin turbo. The main advantage of a twin turbo is that it provides both higher power and low turbo lag. With a single turbo you usually have to choose one or the other or half & half, etc.
Also remember that the FD has a better suspension than the FC. It is both a better type and it's much stiffer. You can stiffen up your FC suspension for improved handling (which you pay for with a bumpy ride), though you can't really change the suspension type. For stiffness you just get new shocks, springs and sway bars. They sell various stiffnesses, just buy your preference and make sure all 3 have about the same level of stiffness. Lighter wheels and tower braces can improve handling without hurting the ride, but the gains are less. So can larger wheels, but anything above an extra inch or two and the added weight could make things worse. Ditto for tires too, but you might pay in the form of cost, low treadlife, poor snow/ice traction, bumpier ride (for narrow "rubber band" tires) and/or slightly worsened gas mileage.
Last edited by ericgrau; Jun 11, 2007 at 10:15 PM.
Rotary Enthusiast
Joined: Mar 2007
Posts: 1,485
Likes: 0
From: Pasadena
I also heard about something with the housings lasting longer. What is it about the fd engine that allows it to handle more power? Im still used to cyl engine with reinforced ribs on the block, beefey main cams n girdles, and closed deck blocks. Please enlighten me