I don't know if this is true or not, but do the JDM B20z's have a higher compression ratio (bigger dome piston) than the US B20's?

IF the JDM B20z does have a higher compression, what is it?


BTW, what is a stock US B20z's compression ratio?

thanks
jmeris
#47 WC HC

 

jdm b20b = usdm b20z
usdm b20b = less compression
search

 

https://honda-tech.com/zerothread?id=460954

this thread has TONS of info...

READ IT!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg_type_r93 &raquo;</TD></TR><TR><TD CLASS="quote">jdm b20b = usdm b20z
</TD></TR></TABLE>

are people still saying this? This was disprooved long ago.

 

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

are people still saying this? This was disprooved long ago.</TD></TR></TABLE>
Can you explain or give me link to this info?Thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Skip01 &raquo;</TD></TR><TR><TD CLASS="quote">
Can you explain or give me link to this info?Thanks</TD></TR></TABLE>

DUDE, CHECK THE LINK

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20_EK &raquo;</TD></TR><TR><TD CLASS="quote">

DUDE, CHECK THE LINK </TD></TR></TABLE>
I did buddy,but it says the JDM B20b and USDM B20z are the same.
99-00 JDM B20B are 9.6:1 PHK compresion pistons
Rated at 146hp
99-00 USDM B20Z are 9.6:1 PHK compression pistons
Rated at 146hp

The dude above said they are different.I wanted him to explain.DUDE

 

Dudes, the link is to probably the best b20 tech thread there is here. It basically says that the pre-99 b20b's (there were only b's then) are the same on both sides of the pond. Both having the lower cr pistons.

The '99's and up have the same high cr pistons, but they're called z's here, and B's, still, in japan. A tell tale sign of the higher cr is the knock sensor.

BUT, there is the extreme possibility of a mid compression b20b, at 9.2:1 (from japan only). The speculation was that they use a 2 layer head gasket (insted of 3) along with the lower cr pistons to do it. The belief is that those engines come with the low rise "ls" style intake mani.

I just wrote that all out of my memory, so i think it was right, but read the link, dudes.

d

 

having flashbacks,

cant seem to focus,

where is the search button...