Hey guys...I just bought a SOHC ZC engine and am wondering does anything need to be done with the wiring to put it in my '89 CRX HF...also to are all the mounts going to line up....and I can use the stock HF tranny right? thanks for all your help...

 

Stock tranny can be used, Only wiring is DPFI to MPFI. All mounts will work. It's a straight D swap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">Stock tranny can be used, Only wiring is DPFI to MPFI. All mounts will work. It's a straight D swap.</TD></TR></TABLE>

Please stop, you are wrong. The HF is already MPFI. It is the only other MPFI 4th gen (Si). If you are using your HF transmission, then the mounts are the same and you will need a pm7, pm6 or pg7 ecu. You do not want the HF ecu running the ZC.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">Stock tranny can be used, Only wiring is DPFI to MPFI. All mounts will work. It's a straight D swap.</TD></TR></TABLE>

Ok what is this DPFI and MPFI....Im guessing Direct Piont Fuel Injetion and Multi Point Fuel Injection...right?...anyway how do i go about doing that....?thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mach69 &raquo;</TD></TR><TR><TD CLASS="quote">

Please stop, you are wrong. The HF is already MPFI. It is the only other MPFI 4th gen (Si). If you are using your HF transmission, then the mounts are the same and you will need a pm7, pm6 or pg7 ecu. You do not want the HF ecu running the ZC.</TD></TR></TABLE>

Will the HF ECU run the motor?....also what cars are those ECU's out of...sorry thanks guys

 

Bump...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">Stock tranny can be used, Only wiring is DPFI to MPFI. All mounts will work. It's a straight D swap.</TD></TR></TABLE>

anyone can help me?...please....
also the ZC engine i have is an auto....will my HF manual...flywheel hook up to this engine when i remove the auto flexplate?

 

the HF ECU will run the engine, just not very well - you need PM6 ECU from 88-91 CRX/Civic Si - your HF flywheel will bolt right to the engine (make sure you use the manual flywheel bolts) and you can use your transmission - use your HF engine harness on the new engine - you will have no wiring changes, but you will have one connector left over that won't be needed, that went to the EGR valve on the HF - be sure to mark all connectors on the engine harness, as to where they go, as some can be switched

 

I also have a SOHC ZC in my '89 CRX Si. Yes, like they said it is a direct swap. Everything will swap over. Do use a CRX Si ecu though as was previously stated (ebay is cheap) or the car will suck. Mine runs pretty nicely. Heres a list of what I have in my car.

1989 Honda CRX Si

Powerplant:
SOHC ZC
Performance:
Cold Air Intake
Intake Manifold
4-2-1 Header
High Flow Catalytic Converter
Cat Back Exhaust
Underdrive Pulley
Relocated Dry Cell Battery
Drivetrain:
ZC Transmission
(Stage 3) Six-Puck Racing Clutch
8-Pound Flywheel
Short Shifter
Shift ****
Brake Pads
Racing Steering Wheel
Suspension:
Front Sway Bar
Rear Sway Bar
Front Strut Bar
Rear Strut Bar
Front Lower Tie Bar
Rear Lower Tie Bar
Upper C-Pillar bar
Lower C-Pillar bar
Gas Shocks
Lowering springs
Lighting:
Projector Head Lights
170 watt Head Light Bulbs
Clear Corner Lights
Led Turn Signal Bulbs
Clear Bumper Lights
White Gauge Faces
Shift Light
Extras:
Weight Reduction
Shoulder Pads
Oil Cap

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SohcZcCrx &raquo;</TD></TR><TR><TD CLASS="quote">Clear Corner Lights
Led Turn Signal Bulbs
Clear Bumper Lights
White Gauge Faces
Shift Light
Extras:
Weight Reduction
Shoulder Pads
Oil Cap</TD></TR></TABLE> I feel ike I am playing NFSU.....<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">the HF ECU will run the engine, just not very well - you need PM6 ECU from 88-91 CRX/Civic Si - your HF flywheel will bolt right to the engine (make sure you use the manual flywheel bolts) and you can use your transmission - use your HF engine harness on the new engine - you will have no wiring changes, but you will have one connector left over that won't be needed, that went to the EGR valve on the HF - be sure to mark all connectors on the engine harness, as to where they go, as some can be switched </TD></TR></TABLE> By the way, your stock intake tube won't attach to this throttle body since their is an epic difference between the HF TB and the PM6 TB.

 

thanks guys for all the help...i should just go aftermarket on the intake tupe huh....although do i get one made for the ZC or can i get one for a Si CRX and that one will work?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM_CivicEG6 &raquo;</TD></TR><TR><TD CLASS="quote">thanks guys for all the help...i should just go aftermarket on the intake tupe huh....although do i get one made for the ZC or can i get one for a Si CRX and that one will work?</TD></TR></TABLE> From now on, don't think of your motor as a SOHC ZC, think of it as a D16A6. That'll make part buying so much easier

 

I'm almost sure that all HF in 88-89 are DPFI, in 90-91 they are MPFI, and since he has a 89...

 

I have a 90 CRX HF and I also have a SOHC ZC. All the mounts line up fine. The fuel injection needs to be swapped over. the best way to do this is to take it to a shop and have it done or you can also send your stock engine harnesss to rywire.com and they can wire in the injectors for you. there are a couple other sensors that work on the DPFI that wont meet up with your MPFI so you will have to have someone check those out and wire them correctly. as for the flywheel, it should work as long as everything lines up. the best way is just to try it out and make sure...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">I'm almost sure that all HF in 88-89 are DPFI, in 90-91 they are MPFI, and since he has a 89...</TD></TR></TABLE> NO, all HF's were MPFI

 

Here are some good links concerning this issue.

 

OOps, here's a bunch of good as links under this link. https://honda-tech.com/zerothread?id=1508680

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote"> NO, all HF's were MPFI</TD></TR></TABLE>

Yes SiR they all were MPFI

 

Check out my project thread, lol.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote"> NO, all HF's were MPFI</TD></TR></TABLE>

Well, 84-87 ones werent. But I get your point. 88-91 CRX HF's are all MPFI.

 

yes they are all multiport..trust me i have one!!!