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what tranny do i use?

763 Views 6 Replies 5 Participants Last post by  dsmbuilder
hey i am thinking about saving up for a jdm 4g63 6-bolt cyclone motor to drop in my rs to replace the 420a but i will need it to be FWD...so what transmission do i use?...i was told that i couldnt do it because all of the trannies that are applicable to the motor are AWD...i am just looking for clarification...also what is the difference between the cyclone engine and the regular usdm 4g63??
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This is not a bolt in affair by any means, but you will need to find a FWD transmission for the 4G63. Yes they do make these and you have a few choices. You could use an AWD transmission with a Viscous Coupling Eliminator (search to find out about this, called VCE for short www.teamrip.com) to make it only power the front wheels. You could also use a FWD turbo or non-turbo transmission that came on both the 4G63 turbo and non-turbo models. In addition, you could even use the 1.8L motor's transmission (don't know the engine code by heart on that motor) as it bolts up to the 4G63 as well. Take your pick and have fun. Hope this helps.
also what is the difference between the cyclone engine and the regular usdm 4g63??
Essentially, they are identical. The block and head are no different whether they are US or JDM motors. The "cyclone" refers to the dual runner intake manifold that is vacuum actuated and uses a short runner at low rpm to help out with low end torque and then switches over to long runners at high rpm to help with top end torque. Some people opt to wire this up, and keydiver sells a chip now that helps activate this intake manifold properly without having to do as much wiring (check out www.dsmchips.com). Others just swap over the US intake manifold for ease of installation. There was a thread on here a long time ago with flow tests for each of these manifolds and the JDM manifold flowed like ~2-3 cfm more than the US intake manifold so they are essentially identical when you are talking about which one makes more power. Once again, your choice on that one.

The only perk for going with a JDM motor is if you find a Galant RS or EVO 1-3 motor. These motors come with yellow top injectors that are rated at 510cc/min. In addition, they come with a big16g turbo instead of the smaller 14b. To identify the turbo, look inside the compressor housing, if all the wheels are the same size, you have a 14b. If the wheels alternate in size (big, small, big, small, ...) you have a 16g. The EVO motors are 7 bolt from my experience and the heads are similar to the 2g in that the ports are small. I think the Galant RS has just a big16g turbo whereas the EVO motors come with the EVO big16g, which has a slightly larger compressor wheel, but I'm not exactly sure about that one. Hope this info will get you at least somewhere with what you want to do.

In short, don't pay extra for a JDM motor because it is "JDM". US motors are essentially identical and you don't get any additional gains from a JDM motor unless you stumble across the rare motors with the 16g turbo. Good luck.
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thanks for the help...i will be swapping the 420a out with a 4g63 bu t not any time soon...but either way this info has helped out a lot...thanks once again :)
you will need: gst front suspension(all of it) new fenderwells, you will have to cut and remove your motor mount locations and reinstall the fwd turbo mounts, you will need a fwd transmission, motor, entire engine wiring harness, possible a cluster, shift linkage,fuel pump,various wiring differences. when you add all this up plus the labor it would be cheaper to buy a turbo car or even cheaper to turbo you exsisting motor. its just not worth it.
g9s0x said:
This is not a bolt in affair by any means, but you will need to find a FWD transmission for the 4G63. Yes they do make these and you have a few choices. You could use an AWD transmission with a Viscous Coupling Eliminator (search to find out about this, called VCE for short www.teamrip.com) to make it only power the front wheels. You could also use a FWD turbo or non-turbo transmission that came on both the 4G63 turbo and non-turbo models. In addition, you could even use the 1.8L motor's transmission (don't know the engine code by heart on that motor) as it bolts up to the 4G63 as well. Take your pick and have fun. Hope this helps.
are you saying that he can use 1g trannies in a 2g, That is not possible, in the 1g the motor mounts hook to the block, in the 2g, they are mounted on the tranny, the 1g trannies do not have the holes to bolt the mount. So if you did it, there would only be the timing side mount, and the tranny mount.
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