I have found a couple 90-93 for pretty cheap but im just curious would it be best performance wise to go with a 94+ or even an OBD2 block, this motor will be going in a 2000 si with a si tranny head...

 

I think the 94-01 block would be btter than the 90-93.... I think the newer the better actually

 

cool. any other opinions?

 

there the exact same block.. only differences between the 90-93 and the 94 up is the obd and the head differences

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by coptzer &raquo;</TD></TR><TR><TD CLASS="quote">there the exact same block.. only differences between the 90-93 and the 94 up is the obd and the head differences</TD></TR></TABLE>

If they are the same block what is the difference with the B18A as opposed to the B18B?

Isnt the 90-93 the B18A? and the 94+ blocks are b18b right?

 

why not b20?

 

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

If they are the same block what is the difference with the B18A as opposed to the B18B?

Isnt the 90-93 the B18A? and the 94+ blocks are b18b right?</TD></TR></TABLE>

the only differences are in the head

90-91 are even different from the 92-93, the differences are in the head

94-00 are same everything at 92-93 basically except hydro trans.... blocks are same throughout.... but if you can get a newer block by all means get a newer one unless you plan on changing internals anyways....

 

the difference between the LS's motor are as:

90-91 B18A motor...ODB0 130 hp (poor head design/combustion/ports)
92-93 B18A motor...ODB1 140 hp (better head design)
94-95 B18B motor...ODB1 140 hp (same thing)
96-01 B18B motor...ODB2 143 hp (don't know how they got that extra 3 hp)

 

go b20 ... you'll be much much happier

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dew1996si &raquo;</TD></TR><TR><TD CLASS="quote">go b20 ... you'll be much much happier</TD></TR></TABLE>

I dont really want to go crv-tec because I've heard the sleeves always crack and Im only gonna be using this as a semi-daily driver and I dont want to have to put any money into it that I dont have to

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shermanyang &raquo;</TD></TR><TR><TD CLASS="quote">the difference between the LS's motor are as:

90-91 B18A motor...ODB0 130 hp (poor head design/combustion/ports)
92-93 B18A motor...ODB1 140 hp (better head design)
94-95 B18B motor...ODB1 140 hp (same thing)
96-01 B18B motor...ODB2 143 hp (don't know how they got that extra 3 hp)</TD></TR></TABLE>

can you tell me which ones came with cable or hydro tranny?

 

90-93 have cable tranny
94-01 have hydro tranny

 

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

I dont really want to go crv-tec because I've heard the sleeves always crack and Im only gonna be using this as a semi-daily driver and I dont want to have to put any money into it that I dont have to</TD></TR></TABLE>

So whats the reason that the sleeves always crack? I don't see how this can happen unless your always beating on it. Is it because the sleeves are so thin becuase its bored to 84mm?

 

b20 with stock sleeves but damn i wish i would have sleeved it they cracked all
$ down the drain=( i think im going w a vetc block

 

I think you guys are all wrong about the block. I believe the B18A's have knock-sensors and the B18B's do not, or vice-versa. But the blocks are not identical.

 

correrct some.......

 

Time for an EKology 'Learnage' session

B18A blocks do not have knock sensors (won't matter if you use p28) and they also have the PCV system on the block (like all other B-Series VTEC motors), while B20 & B18B have them on valvecover.

 

94 has on back of block ?no