What´s the difference between these blocks?

I need a B18B desperatelly. But I found someone who has a B18A FS. So I would like it if any of tou could give me a hand here.

My car is a '98 ls and the B18A is a '90.

 

B18A = 2nd gen teg non vtec
B18B = 3rd gen teg non vtec

correct me if im wrong ....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stock_LS &raquo;</TD></TR><TR><TD CLASS="quote">B18A = 2nd gen teg non vtec
B18B = 3rd gen teg non vtec

correct me if im wrong ....</TD></TR></TABLE>

Plus I think the B18B head flows a little better and doesn't it have something to do w/ OBD as well? OBDI and b18a is more common as OBDII and b18b? I'm sure someone will help with a little more info.

 

Are you talking about the bare block? Or the entire motor? Entire motor has quite a few small differences. OBD1, cable tranny, etc.

Bare block, I wouldn't worry about the differences since you have to rebuild everything anyway.

 

Please search, this has been covered a million times. It's mainly head differences (cams, intake manifold bolt pattern, etc.), but some of the holes for the sensors may be different in the block (not that big of a deal but there are differences).

 

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

Plus I think the B18B head flows a little better and doesn't it have something to do w/ OBD as well? OBDI and b18a is more common as OBDII and b18b? I'm sure someone will help with a little more info.</TD></TR></TABLE>

lol, obd1 is more common than obd2?? ok. and i don't think on board diagnostics has much to do with a bare block.

 

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

lol, obd1 is more common than obd2?? ok. and i don't think on board diagnostics has much to do with a bare block. </TD></TR></TABLE>

Yea... I was thinking more along the lines of a swap. And by the more common thing, I didn't know if all B18A's were destined for obdI and if all B18B's were destined for obdII so I was thinking of it like:

B18a sees more of obd0 or obd1 (on 2nd gen)
B18b sees more of obd2 (on 3rd gen)

Hope that clears up what I said...

 

Bump

 

b18a1 = g2 1990-1993 RS LS GS Integras
b17 = g2 1992-1993 Integra GSRs
b18b1 = g3 1994+ RS LS GS Integras

If I'm not mistaken, the g2's from 90-91 were pre-OBD while 92-96 Tegs were OBD1 and 97+ Tegs were OBD2. All g2's had cable, while the g3's had hydro.

 

Also the b18b has bigger intake ports.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jaydeemmmm &raquo;</TD></TR><TR><TD CLASS="quote">b18a1 = g2 1990-1993 RS LS GS Integras
b17 = g2 1992-1993 Integra GSRs
b18b1 = g3 1994+ RS LS GS Integras

If I'm not mistaken, the g2's from 90-91 were pre-OBD while 92-96 Tegs were OBD1 and 97+ Tegs were OBD2. All g2's had cable, while the g3's had hydro.</TD></TR></TABLE>

We have a winner! Well almost, OBDI was from 92-95. OBDII started in 96 and so on. Most of the other **** on this thread is bogus.

 

 

SO 1990 INTEGRA HAS OBD WHAT?

 

1990 would have obd0=pre-obd

 

1990-1991=obd 0
1992-1995=obd 1 obd 1 is the best!
1996-higher=obd2

them main difference b/t b18a and b18b is in the head, you could put a b18b head on to a b18a block and be fine......the b18b has about 10 more horse power than the b18a

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda Hick &raquo;</TD></TR><TR><TD CLASS="quote">Please search, this has been covered a million times. It's mainly head differences (cams, intake manifold bolt pattern, etc.), but some of the holes for the sensors may be different in the block (not that big of a deal but there are differences).</TD></TR></TABLE>

No difference in the intake manifold bolt pattern.

 

what exactly would the differences be between the b18a head and b18b head. If Im replacing cams,retainers/springs. Is there anything else that would make the b18b head better to go with?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95GSRTT &raquo;</TD></TR><TR><TD CLASS="quote">what exactly would the differences be between the b18a head and b18b head. If Im replacing cams,retainers/springs. Is there anything else that would make the b18b head better to go with?</TD></TR></TABLE>

The ports are bigger on the b18b head. This has been covered in this thread.

 

is it that big of a difference, or is it pretty insignificant? I figured the b18b head just made a lil more power b/c of the cams...

 

If I have only the B18B1 shortblock to see, and no other part.
How can I tell the difference between 1992-1995=obd 1 and
1996-higher=obd2, and will the harness be different?

 

The b18b has a slightly more aggressive exhaust cam, and there are a few other minor differences as crxspaz pointed out. It's not anything to really worry about if you are building it from the ground up.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxspaz &raquo;</TD></TR><TR><TD CLASS="quote">1990-1991=obd 0
1992-1995=obd 1 obd 1 is the best!
1996-higher=obd2

them main difference b/t b18a and b18b is in the head, you could put a b18b head on to a b18a block and be fine......the b18b has about 10 more horse power than the b18a</TD></TR></TABLE>

Edit: You might find this interesting.






Modified by Hakamoto at 10:33 PM 9/16/2004

 

Just found this about the cams, posted by BlueTeg on TI.net.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Originally posted by BlueTeg on Aug/18/03
************************************************** ****
B18a OEM cam specs

For .050" tappet lift
Intake-
opens at -21.0 ATDC
closes at 31.0 ABDC
Exhaust-
opens at 33.0 BBDC
closes at -19.0 BTDC

Lobe separation 116 deg.

Duration at .050" lobe lift
intake: 190 deg .225
exhaust: 194 deg .221

************************************************** *****


################################################## #####
B18b OEM cam specs

For .050" tappet lift
Intake-
opens at -16.5 ATDC
closes at 23.5 ABDC
Exhaust-
opens at 33.0 BBDC
closes at -23.0 BTDC

Lobe separation 114 deg.

Duration at .050" lobe lift
intake: 187 deg .225
exhaust: 190 deg .225

################################################## #####

Unfortunately I don't have the lift the specs handy right now. I'll look around my filing cabinet tomorrow and see if I can't find the spec sheets and post up the lift figures.

Also note that the figures are listed at .050" which is the standard for usdm cam manufacturers. The JDM cam manufacturers typically list the specs at 1mm of lift. So if you're comparing, just be sure that you're comparing apples to apples.
HTH
</TD></TR></TABLE>

 

90-91 B18A was different from 92-93 as well. They were rated 10hp apart and the 90-91 redlined at 6500 instead of 6800. This reflected differences in the head, not the block.

 

bump

 

well i bought an acura integra ls from 1990 that has a b18b1 in it. looks to be the stock engine in it. also i bought it for 350 bucks beat that.


b18b1 in 1990-93 acura integra ls special edition's and in 90-92 GS
b16a1 in late 1992 gs later gs-R
b18a1 in integra RS

honda specialest told me this