Need help with DX to Si motor swap?
06-03-2003, 10:51 AM
#1
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Need help with DX to Si motor swap?
My friend has a 90 DX and has a 90 Si motor sitting at home. The Si motor is still in the original car, (car was in a rear end wreck), and hes just waiting to put the Si motor in his DX.
-Is this a basic bolt up swap or is there modifications needed?
-What will we need to swap it and what kind of wiring?
Sorry if this has already been covered, never come in the 92-down forum, just need a little help. Thanks in advance.
-Is this a basic bolt up swap or is there modifications needed?
-What will we need to swap it and what kind of wiring?
Sorry if this has already been covered, never come in the 92-down forum, just need a little help. Thanks in advance.
06-03-2003, 11:57 AM
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yah pretty easy swap if u have both cars still, u are gonna have to swap over the ecu and wiring harness from the si cuz itll have mpfi, instead of dpfi, unless u want to make the adjustment for the extra injectors and add a few wires and adjust it to the ecu urself, id say swap over everything, ecu wiring harness, motor and tranny as well as axles and nuckles and hubs if u see the si are beefier. should be able to use the same mounts so no problem there direct bolt over.
06-03-2003, 01:17 PM
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Originally posted by crxb16er
yah pretty easy swap if u have both cars still, u are gonna have to swap over the ecu and wiring harness from the si cuz itll have mpfi, instead of dpfi, unless u want to make the adjustment for the extra injectors and add a few wires and adjust it to the ecu urself, id say swap over everything, ecu wiring harness, motor and tranny as well as axles and nuckles and hubs if u see the si are beefier. should be able to use the same mounts so no problem there direct bolt over.
yah pretty easy swap if u have both cars still, u are gonna have to swap over the ecu and wiring harness from the si cuz itll have mpfi, instead of dpfi, unless u want to make the adjustment for the extra injectors and add a few wires and adjust it to the ecu urself, id say swap over everything, ecu wiring harness, motor and tranny as well as axles and nuckles and hubs if u see the si are beefier. should be able to use the same mounts so no problem there direct bolt over.
06-03-2003, 01:39 PM
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If you have the whole parts car there, you should swap the rear suspension stuff too. You'll get rear disc brakes then. Also the put the si front sway bar on there.
Jung
Jung
06-03-2003, 06:24 PM
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don't try to use the Si engine harness - it is not compatible with the DX chassis harness - you would have to swap in the entire Si chassis harness - you need to use the DX engine harness and do the DPFI to MPFI swap - http://www.geocities.com/teampimports/fuelinj.html
DX knuckles/hubs, mounts and axles are exactly the same as Si.
DX knuckles/hubs, mounts and axles are exactly the same as Si.
06-03-2003, 07:23 PM
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Originally posted by jlicrx
don't try to use the Si engine harness - it is not compatible with the DX chassis harness - you would have to swap in the entire Si chassis harness - you need to use the DX engine harness and do the DPFI to MPFI swap - http://www.geocities.com/teampimports/fuelinj.html
DX knuckles/hubs, mounts and axles are exactly the same as Si.
don't try to use the Si engine harness - it is not compatible with the DX chassis harness - you would have to swap in the entire Si chassis harness - you need to use the DX engine harness and do the DPFI to MPFI swap - http://www.geocities.com/teampimports/fuelinj.html
DX knuckles/hubs, mounts and axles are exactly the same as Si.