Honda Car Forum

I've been looking at egines for a transplant into my 90 Civic. I'm
looking for a torque motor, not a high RPM VTEC one. The obvious
choice is a 130 HP B18A1 or 140 HP B18B, but I keep running across
B20B's out of late 90's CRV's that are 140 HP with a nice fat torque
band.

I'm wondering if these motors are the same external size as a B18, or
whether they might have a taller block to accomodate the longer stroke.
I doubt seriously that it would fit if it is a taller block.

What I really wish I could find would be a B21, but that was a 2 year
only motor from a 90-91 Prelude, and apparently rather rare.

Marty

The B18 and B20 are exactly the same size.

Besides, the Prelude motor will NEVER fit.

Are you planning on using HASport mounts?????


"Marty Bose" <martyb@sonic.net> wrote in message
news:160520041107559375%martyb@sonic.net...
> I've been looking at egines for a transplant into my 90 Civic. I'm
> looking for a torque motor, not a high RPM VTEC one. The obvious
> choice is a 130 HP B18A1 or 140 HP B18B, but I keep running across
> B20B's out of late 90's CRV's that are 140 HP with a nice fat torque
> band.
>
> I'm wondering if these motors are the same external size as a B18, or
> whether they might have a taller block to accomodate the longer stroke.
> I doubt seriously that it would fit if it is a taller block.
>
> What I really wish I could find would be a B21, but that was a 2 year
> only motor from a 90-91 Prelude, and apparently rather rare.
>
> Marty

hey, i'm thinking about a similar project in an '89. the thing is, i
need an automatic [knee problem]. what would you recommend? would the
existing transmission take the increased output?

i've also wondered about some of the later EX vtec motor/transmission
conversions, [because the electronic shift management is /way/
superior], but can't find any reliable info on conversion to odbcII.

again, any info?

Mista Bone wrote:
> The B18 and B20 are exactly the same size.
>
> Besides, the Prelude motor will NEVER fit.
>
> Are you planning on using HASport mounts?????
>
>
> "Marty Bose" <martyb@sonic.net> wrote in message
> news:160520041107559375%martyb@sonic.net...
>
>>I've been looking at egines for a transplant into my 90 Civic. I'm
>>looking for a torque motor, not a high RPM VTEC one. The obvious
>>choice is a 130 HP B18A1 or 140 HP B18B, but I keep running across
>>B20B's out of late 90's CRV's that are 140 HP with a nice fat torque
>>band.
>>
>>I'm wondering if these motors are the same external size as a B18, or
>>whether they might have a taller block to accomodate the longer stroke.
>>I doubt seriously that it would fit if it is a taller block.
>>
>>What I really wish I could find would be a B21, but that was a 2 year
>>only motor from a 90-91 Prelude, and apparently rather rare.
>>
>>Marty
>
>
>

You could modify the point at which the master cylinder piston attached to
the clutch pedal to gain better mechanical advantage. I modified it on my
Civic to reduce pedal pressure by 1/3.

jim beam wrote:

> hey, i'm thinking about a similar project in an '89. the thing is, i
> need an automatic [knee problem]. what would you recommend? would the
> existing transmission take the increased output?
>
> i've also wondered about some of the later EX vtec motor/transmission
> conversions, [because the electronic shift management is /way/
> superior], but can't find any reliable info on conversion to odbcII.
>
> again, any info?