ekjay

what are the specs for a b20b engine? Im looking to buy a jdm motor but they only offer the b20b. I woul like to get a b20z but I dont no where to find one with low milage and under $800.00 for a complete long block. I can get a b20b complete long block for $750.00 but I dont know if its worth it over an ls motor.

4g63tHBmonster

Good question ekjay, lets hope someone answeres cause im in the same boat!

SVOboy

I think there was a thread on this in the tech/misc forum a while back, try searching around for it.

siregcivic

there is a difference between the 96-98's and 99-00's.. the 99-00s have more power.. i forgot... i researched all this info like 6 months ago cuz i was gonna get a b20 and go vtec but the cylinder walls are too thin for me and bottom ends arent balanced that well...

im shure if you search on here something willpop up with all the info you need.. i got a new motor in my car.. its a secret but.. its from japan and before i even bought it i researched for 3 days on here and other sites to find out about it before i buy it and know nothing about it..

its always a good idea to search before you ask.. alot of people on here are jerks about it and just say "SEARCH" and some will answer.. but do search and good luck

ekjay

I found some specs on the b20b but I dont know if they are correct. On jpr motorsports it says that the b20b has 126hp at 5400 rpm, 133lb-ft at 4300 rpm, and a compression ratio of 8.8:1. I dont know if i can trust these numbers because they also list it as a vtec motor, and I know its not a vtec. does anyone know if these specs are correct? Ive searched but cant find any threds on this.

ekjay

never mind. all the info i needed was right in the swap list. it was there the whole time. im tripin.

jdm outlaw

I heard the b20z rocks the socks!

StatusQuo209

I would just bore the LS motor to 84mm and use b20 pistons.

I would go that route so you dont have to deal with cops..

Another option would be to drop some p30 pistons in the LS and tune it. That would be ***** too lol

Rekkless

torque monster

HondaPartsHero

Thread save

B20B

1996-1998 specs
NON-VTEC
Found in: USDM and JDM Honda CR-V, JDM Orthia, Stepwgn, S-MX
Displacement: 1,973 cc (120.4 cu in)
Power: 126 hp (94 kW)) @ 5400 rpm
Torque: 133 ft·lbf (180 N·m) @ 4300 rpm
Rod length: 137 mm (5.4 in)
Compression: 8.8:1 or 9.2:1
Bore: 84 mm (3.3 in)
Stroke: 89 mm (3.5 in)
Redline: 6300 rpm

B20B/B20Z

1999 - 2001 specs
NON-VTEC
Found in: USDM CRV as a B20Z, CR-V and Honda Orthia as a B20B
Displacement: 1,973 cc (120.4 cu in)
Power: 147 hp (110 kW) @ 6200 rpm
Torque: 133 lb·ft (180 N·m) @ 4800 rpm
Rod length: 137 mm (5.4 in)
Compression: 9.6:1
Bore: 84 mm (3.3 in)
Stroke: 89 mm (3.5 in)
Redline: 6700 rpm

hatchheart1410

^wikipedia...

Deetz

This 6 year old thread keeps getting bumped

I guess i will add the exact info the OP was looking for....

In Japan, they only had what was known as the B20B, and never got the B20Z stamping, even though, their 99-01 models were in fact the more powerful, high compression models which were "identical" the the US B20Z.

The differences are very noticable in the real world, even though they look small on paper. The 99+ models did make the extra 20hp, but what people don't realize is how much better a power band the newer engine has.....it made more power, and for much longer, right into redline and the power didn't drop off, it would just bounce off the rev limiter if you weren't fast enough with your shifts in the lower gears

- it has high comp pistons
- the newer cams also found on 98+ integra LS engines P75
- superior intake manifold design- low profile
- used a knock sensor

And for the swap in my EK, worked best with an OBDI conversion with an OBDI PR4 ecu from the 92-93 Integra. I tried the 94-95 P75 ecu, but it didn't run as nice


I also want to add that this engine was "under rated from power as far as power output. Now i am sure people are thinking "under rated", what is he talking about. Well, for some reason, Honda made was is easily the worst design of any of the B series exhaust manifolds for the B20 engine. The addition of a header on most b series engines usually only adds between 1-4hp to the wheels in most applications, but because the design was so poor on the oem B20, adding any style of header which is common for most swaps, adds some decent numbers, often 8-12 to the wheels!

The B20Z make significantly more power than a B16A does, stock for stock. Sure, it doesn't rev nearly as high, and it doesn't have too. Serious power comes on just after idle giving you the ability to start to burn the tires as low as 2500rpm, and not stop till the rev limiter which is roughly 6600rpm, but that doesn't matter because when you shift into the next gear, there is a bunch more power waiting for you again in the next gear.

b20bFourDoorCivicLX

got a b20b in my ek, how do i find out what year my motor is?

nealnanoHX

If you can find a B20Z with a P8R head they are the shiz way better than the P75 heads that all B20B and some B20Z have.

skerrttt

B20s with a p8r head have a 9.2:1 CR, where if you get a 99-00 spec B20, it has a 9.6:1 CR with a p75 head. On the front of the head, above the exhaust manifold, are numbers in a circle with a line through it. the first one is the year, the line means nothing. so mine says 9/9 in a circle, meaning it is a 99 spec b20b. the next circle is the month it was manufactured. again, mine says 0/6, meaning is was manufactured in june. i dont know what the other 2 circles with numbers mean though haha

b20bFourDoorCivicLX

i cant tell in one in the first circle half of the circle is covered by the heat shield i could swear it looks like 0/0 but im not sure


0/? 0/6 2/0 0/1 and to the far right is p7512
what you think year b20b i have

skerrttt

Is it a JDM b20? if it starts with a 0, then I'm gonna guess it is a 2000 b20b, which would make it a high compression b20b, which has a 9.6:1 compression ratio. Now, since you cant see the other number, you should check behind the block for a knock sensor, which you can see in the first picture in the link below:

https://honda-tech.com/forums/tech-misc-15/difference-compression-between-b20b-vs-b20z-460954/

ALL high compression b20s, whether is it s b20b or b20z have a knock sensor. if you do then you have yourself a nice b20. alot more get up and go than the older b20s for sure.

theyre rated at 146 hp, but that is including all the restricive stock parts of a CRV, so, with a decent exhaust and/or header, you could easily make 130-150 at the wheels. I've read of stock b20s dynoing as high as 160hp as well.

b20bFourDoorCivicLX

it is indeed a jdm b20b and the first circle is 0/0 i looked really close i mean if i can see a 0/ what year goes with 0? lol has to be a 2000? right also my car used to be obd2 now its obd1 ..we avoided the knock sensor to make the swap a little easier plus so i can tune it easier... 0/? 0/6 2/0 0/1 "b20b 3508912 " <--block vin

it surely pulls. with that gsr tranny 5 puck clutch easily chirping 3rd gear. i always wanted to know if it was a high or low comp b20b and what year.

skerrttt

mine is the same way, obd2 to obd1. my knock sensor isnt hooked up either, but if you have one on the block, hooked up or not, then your b20 is high compression, and you can then safely assume it a 2000 b20

skerrttt

im not sure what the last 2 numbers signify, but the 0/6 is the month

b20bFourDoorCivicLX

LOOKED IN THE BACK and actually theres thread to where a sensor used to be so its missing it = no knock sensor lol wish i could take a pic but my phones off right now

skerrttt

hmmm.... Idk if the other blocks are like that, or of maybe yours was just removed. I'm gonna be willing to bet though, that yours is a 2000 spec high compression b20

b20bFourDoorCivicLX

heres a pic of what i think is where the knock sensor used to be





heres the best pic i got of the first little circles on the head you can see a 0/ but the rest is covered by my heat shield on my header. but if look hard enough i can see what is a 0/0 meaning its a 2000

midnightrunner

B20B JDM
1996–1999 specs
NON-VTEC
Found in: JDM Honda Orthia, CR-V
Displacement: 1,972 cc (120.3 cu in)
Power: 145 hp (108 kW) @ 6200 rpm
Torque: 178 N·m (131 lbf·ft) @ 5200 [4500 rpm 2.0GX-S]
Rod length: 137 mm (5.4 in)
Compression: 9.2:1
Bore: 84 mm (3.3 in)
Stroke: 89 mm (3.5 in)
Redline: 6700 rpm
Rev limit: 7200 rpm

Daniel Ra

What kind of oil are you guys running in your B20 B turbo