Honda Car Forum

I'm close to putting an SOHC ZC motor into my 90 Civic commute car.
I'm using a US CRX Si intake, an original ZC 4-2-1 exhaust primary into
a low restriction cat-back system. Keeping the DX tranny for highway
cruising economy.

I've seen lots of suggestions for the right ECU for a DOHC motor, but
not for the SOHC. I would think that a US CRX Si ECU might be a little
on the lean side since it makes less horsepower, maybe a 1600cc first
generation Integra would be closer? Anyone with first hand experience?

Marty

I never had any problems with my stock 90 civic HB ecu on my sohc zc.

Question? Why are you using a CRX Si intake over the ZC one?

Chris

"Marty Bose" <martyb@sonic.net> wrote in message
news:200720041910318233%martyb@sonic.net...
> I'm close to putting an SOHC ZC motor into my 90 Civic commute car.
> I'm using a US CRX Si intake, an original ZC 4-2-1 exhaust primary into
> a low restriction cat-back system. Keeping the DX tranny for highway
> cruising economy.
>
> I've seen lots of suggestions for the right ECU for a DOHC motor, but
> not for the SOHC. I would think that a US CRX Si ECU might be a little
> on the lean side since it makes less horsepower, maybe a 1600cc first
> generation Integra would be closer? Anyone with first hand experience?
>
> Marty

Trying to make it pass the visual inspection part of a California smog
check; if anyone asks, it's a 90 Si motor!

Marty

In article <nglLc.19965$Gf7.739176@news20.bellglobal.com>, _chris_
<chris_farr@sympatico.ca> wrote:

> I never had any problems with my stock 90 civic HB ecu on my sohc zc.
>
> Question? Why are you using a CRX Si intake over the ZC one?
>
> Chris
>
> "Marty Bose" <martyb@sonic.net> wrote in message
> news:200720041910318233%martyb@sonic.net...
> > I'm close to putting an SOHC ZC motor into my 90 Civic commute car.
> > I'm using a US CRX Si intake, an original ZC 4-2-1 exhaust primary into
> > a low restriction cat-back system. Keeping the DX tranny for highway
> > cruising economy.
> >
> > I've seen lots of suggestions for the right ECU for a DOHC motor, but
> > not for the SOHC. I would think that a US CRX Si ECU might be a little
> > on the lean side since it makes less horsepower, maybe a 1600cc first
> > generation Integra would be closer? Anyone with first hand experience?
> >
> > Marty
>
>

The local shop in town puts those SOHC ZC engines (with the USDM intake and
exhaust) in 1.6l civic (88-91) and they use the stock Si or EX ecu with no
problems. They have also taken the carbs off of the JDM D15 and installed
the FI intakes from the 88-95 DX and LX civic and they work just fine too.


"Marty Bose" <martyb@sonic.net> wrote in message
news:200720041910318233%martyb@sonic.net...
> I'm close to putting an SOHC ZC motor into my 90 Civic commute car.
> I'm using a US CRX Si intake, an original ZC 4-2-1 exhaust primary into
> a low restriction cat-back system. Keeping the DX tranny for highway
> cruising economy.
>
> I've seen lots of suggestions for the right ECU for a DOHC motor, but
> not for the SOHC. I would think that a US CRX Si ECU might be a little
> on the lean side since it makes less horsepower, maybe a 1600cc first
> generation Integra would be closer? Anyone with first hand experience?
>
> Marty

SOHC non VTEC ZC motor is the same as CRX Si motor.
"Marty Bose" <martyb@sonic.net> wrote in message
news:200720041910318233%martyb@sonic.net...
> I'm close to putting an SOHC ZC motor into my 90 Civic commute car.
> I'm using a US CRX Si intake, an original ZC 4-2-1 exhaust primary into
> a low restriction cat-back system. Keeping the DX tranny for highway
> cruising economy.
>
> I've seen lots of suggestions for the right ECU for a DOHC motor, but
> not for the SOHC. I would think that a US CRX Si ECU might be a little
> on the lean side since it makes less horsepower, maybe a 1600cc first
> generation Integra would be closer? Anyone with first hand experience?
>
> Marty