ZC DOHC swap this easy?
Thread Starter
Joined: Apr 2007
Posts: 91
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From: Lima, Ohio, usa
ZC DOHC swap this easy?
I found this online. Is the ZC swap this easy?
The ZC bolts right in to the 88-91 Civic/CRX with no fabricating or welding. If your car is an Si or HF the wiring harness will hook right up with just the change of 2 wires on the distributor. If it is a DX then some more significant wiring changes are necessary since the DX motor does not have MPFI (Multi Point Fuel Injection). Installing a ZC motor into a DX? You'll want this wiring diagram to make life easier.
You can use the ECU from either the U.S. CRX Si, 88-89 Integra 5 speed, or the Japanese CRX Si which is what the ZC came out of anyway. The best choice would be the Integra one since it has more aggressive fuel and timing maps as well as a higher redline than our CRX Si ECU and its readily available, . The Japanese Si ECU is probally just as good but they are very hard to get and have a speed governor that is set at too low for most peoples taste.
The motor bolts right up to the stock motor mounts and to the tranny. While the HF tranny does bolt onto the ZC you will definatly want to use an Si tranny because of the much better gearing, you may even want to consider this if you have a DX.
Replace the clutch. As long as everything is apart it doesn't require any extra work to replace it. A performance clutch is recommended because of the ZC's greater output.
The motor only weighs about 25 pounds more than the regular CRX one so handling is not affected.
Here is a picture showing which two wires need to disconnected from the distributor and attached to the exhaust cam sensor.
The ZC bolts right in to the 88-91 Civic/CRX with no fabricating or welding. If your car is an Si or HF the wiring harness will hook right up with just the change of 2 wires on the distributor. If it is a DX then some more significant wiring changes are necessary since the DX motor does not have MPFI (Multi Point Fuel Injection). Installing a ZC motor into a DX? You'll want this wiring diagram to make life easier.
You can use the ECU from either the U.S. CRX Si, 88-89 Integra 5 speed, or the Japanese CRX Si which is what the ZC came out of anyway. The best choice would be the Integra one since it has more aggressive fuel and timing maps as well as a higher redline than our CRX Si ECU and its readily available, . The Japanese Si ECU is probally just as good but they are very hard to get and have a speed governor that is set at too low for most peoples taste.
The motor bolts right up to the stock motor mounts and to the tranny. While the HF tranny does bolt onto the ZC you will definatly want to use an Si tranny because of the much better gearing, you may even want to consider this if you have a DX.
Replace the clutch. As long as everything is apart it doesn't require any extra work to replace it. A performance clutch is recommended because of the ZC's greater output.
The motor only weighs about 25 pounds more than the regular CRX one so handling is not affected.
Here is a picture showing which two wires need to disconnected from the distributor and attached to the exhaust cam sensor.
I'm a Jackass
Joined: Mar 2004
Posts: 683
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From: South Central Los ANgeles, CA, USA
Re: ZC DOHC swap this easy? (89crxsiVT)
try ebay or some other online or local importer.
The swap it self is easy. Just like dropping in another Single cam. Shift linkages are the same. the only difference is the dizzy and the cam angle sensor is on the exaust side of the cam, not in the Dizzy.
good luck!
The swap it self is easy. Just like dropping in another Single cam. Shift linkages are the same. the only difference is the dizzy and the cam angle sensor is on the exaust side of the cam, not in the Dizzy.
good luck!
Thread Starter
Joined: Apr 2007
Posts: 91
Likes: 0
From: Lima, Ohio, usa
Re: ZC DOHC swap this easy? (julio_bOostamante)
I have looked all over and haven't been able to find one that is closer to me or the car. If you need to get in touch with me e mail me @ deathman369@yahoo.com
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