Which years were the 9.6:1 compression B20b's in Japan?

If I have a JDM B20B how do I tell whether it is 9.6:1 compression or 8.8:1 compression without tearing down the engine?

(JDM only, I know on USDM motors)

 

If it's from a JDM CRV, then it's possible that the 97-98 B20B motors are 8.8:1 comp, and the 99-00 B20 motors are 9.6:1 cr. But every B20B motor out of an Orthia (JDM wagon) that has a B18B LS-style intake manifold, they're all 9.6:1 cr. Just about most JDM B20 motors that come over are 9.6:1 compression.

 

yep nailed it right on the head.

Blaze

 

I have one with a tall intake manifold like the USDM B20B's. That wouldn't be 8.8:1 would it?

 

bump for you because I would like to know and so would the other b20 freaks out here

 

FWIW

I have a 1997 JDM B20B with 9.6:1.

 

After the lack of resources and help, I took one for the team and decided to do some hardcore(LOL) research. I went to Honda of Japan and read up on the release dates/changes made to the CR-V. I only read about the engine specs and tried to dig up as much info as I could from all the gibberish that I was reading and here is what I've found:

P.S. I'm looking at the History of the CR-v section, if you're wondering:

Also I didn't know that CR-V was an acronym for Comfortable Runabout Vehicle

October 9, 1995
< Engine >
As 2. 0l engines of new development adopt worldwide first 4 connected sleeve blocks as mass production car, compact conversion achieve high efficiency at high level, the ‚ê are guarantee routing characteristic immediately at the engine size like 1.6 L low fuel economy (*) it actualizes.
* 10 * 15 mode travelling fuel consumption rate 11. 2km / L (Ministry of Transport examination value)

- High torque quality
In the practical engine rpm limits largest torque (19. 0kgm / 4, the 200rpm) it has the port length of the 370mm in order to occur, you adopt the long * intake manifold. --Reason for the "Giraffe intake manifold"

Being smooth it occurs from low speed, feeling of thick torque and high-speed travelling time it has been compatible travelling feeling which is good.

Transmission was an electronically control 4 speed automatic


October 2, 1997
In this time span, Honda offered two models--Smart and Active types
1. Smart ƒXƒP�[ƒv, as for standard specification and B specification, 2.0L DOHC 16 valve 130PS/18.8kgm engine + new direct
It loads the control 4th gear automatic * transmission.
2. As for active ƒXƒP�[ƒv, 2.0L DOHC 16 valve 145pS/18.2kgm engine + floor type 5 fast manual * transmission.

December 18, 1998
What I found intriguing was that they made a lil more juice ~5 more ponies in this model.

The highest output 150PS 2l DOHC 16 valve engine which evolved more powerfully. As for 4th gear AT cars the 20PS, as for 5 fast MT cars it achieves the output rise of the 5PS.

What it said there was, the manual Transmission had something like 150hp compared to the auto tranny which had 125hp. This sounds pretty odd... I need who can read Japanese here to translate

It also mentions that this year's model reduced emission as stated:

Decreasing the discharge quantity of the harmful matter, 7 capital prefectural city /6 prefectures city appointments it clears the regulation value of the pollution car low.

September 8, 2001
Introduced the new design with the 2.0 i-VTEC


Just some food for thought here.

 

How do you know your 97 JDM B20b is 9.6:1 compression? Also did it have the tall intake manifold like the USDM b20b's?

 

Yes, it did have the tall manifold.

I know its a 1997 because I can tell from the block code.

I did a compression check and I BELIEVE, it was a while ago, It got over 200 across the deck.

 

Hmmm...That sounds like 9.6:1.

See I'm not sure if the 9.6:1 compression JDM B20's had the same tall intake manifold as the USDM 8.8:1 B20's. I was expecting them to have a resonator box like the USDM B20z's. The engine is a 98 JDM B20b.

 

Rob, when I got the motor, the manifold was TALL but DID NOT have the resonator box like the USDM B20Z.

But if I remember correctly, my compression check came back at ~204 across.