newman

Theres been a lot of people recommending each of these engines latley, but everyone is quick to bash the B18 unless it going to be boosted. I agree with getting one of the two motors over some of the other options, but why not the LS.

The power between the motors are very close and face it the MAJORITY, not all, of the people who will buy these motors will not go past the I/H/E anyways.
You should be able to get the LS cheaper, depending on where you go. For the people wo are anit-JDM, if you buy the motor used you can probably see it running in a car as well.

Why does everyone think B20>B18

imported_mugen_r

b20 has a larger displacement. It's a 2.0L motor while the B18 is 1.8L. With the more displacement the motor has a bit more TQ I believe.

It's not 'jdm' or not.
I'm building an a 91 LS motor b18a for my coupe with the motor being close to stock with a few minor things done to it. Most of the money is going into the transmission to put down the power the motor outputs.

I'd like to get a b20 but they are a bit more expensive if you do find it then a LS engine from what I saw.

newman

Depending on the version of the B20 the torque difference is 6lbs and horsepower is 4, according to teknotik.

I'm aware about it also not being JDM, my point is a lot of people are not as trusting on jdm motors as they would be a USDM simply becasue you might be able to see it running.

My point is to ask why people are quick to recommend the B20 over the LS, when the LS has many benefits to it as well.

imported_mugen_r

B18B 1.8 16V DOHC PGM-FI 1834 130hp@6000rpm 121tq@5000rpm '90-'91 Integra GS (USA)

B18B1 1.8 16V DOHC PGM-FI 1834 142hp@6300rpm 127tq@5200rpm '94-'00 Integra RS/LS/GS (USA)

B20B 2.0 16V DOHC PGM-FI 1997 126hp@5400rpm 133tq@4300rpm '97-'98 CR-V (USA)

B20Z 2.0 16V DOHC VTEC PGM-FI 1997 146hp@6400rpm 143tq@4500rpm '98-'01 CR-V (USA)


Like you said the HP is almost the same between the b20z and b18's but I would still like to go with a B20Z and work a vtec head on the engine.

Both motors setup for LS/vtec and B20(cr)vtec can yeild some really great #'s but it all depends on the build done.

It just comes down to user preference. People will go with a b20 because of the 2.0 displacement which can be used to produce stronger HP/TQ figures compared to a 1.8

imported_t_dot_SiR

because if your goal was for torque already... going a larger displacement to start with makes things easier, because you don't have to bore or use a stroker kit to raise displacement later on your engine...

and another reason is... if you only have a certain budget to start with and you will build your car over time... a b20 would be enough to keep you happy being stock for the time being... LS would do good too... but on a light car like civics... even just 6lbs/ft torque would make a difference when you pull it hard... and more ideally if you can get a b16 tranny... you would be nuts in city... but if you do highway a lot, gsr tranny would be best bet...

LS or b20... both are good motors to boost... and lately, LS has been into a trend of being n/a... there's lots of success on H-T.

lots of people start with b20 because of the higher displacement to start with... and its easier to built HP than torque, unless you boost =)

imported_t_dot_SiR

built a b20z block with itr head... now that's sick i believe haha

newman

True but I was referring to the B18B should have been more specifc regarding the specs.

I agree with the B20 if you want to modify it but the majority of people are not willing to build a motor. Most people are all talk and little or no action.

Nova_Dust

B20 has 6 different versions:

Orthia 95-99 Spec Motor

総排気量（cm3）
1,972
内径×行程（mm）
84.0×89.0
圧縮比
9.2
最高出力（PS/rpm）*
145/6,200
最大トルク（kg・m/rpm）*
18.2/5,200


96 SMX spec motor

総排気量（cm3） 1,972
内径×行程（mm） 84.0×89.0
圧縮比 8.8
性能 最高出力（PS/rpm）＊ 130/5,500
最大トルク（kgm/rpm）＊ 18.7/4,200


99-00 SMX wagon
エンジン型式 B20B

総排気量（cm3） 1,972
内径×行程（mm） 84.0×89.0
圧縮比 9.6
性能 最高出力（PS/rpm）＊ 140/5,500
最大トルク（kgm/rpm）＊ 19.0/4,200

B20 Stepwagon
エンジン型式 B20B
総排気量（cm3） 1,972
内径×行程（mm） 84.0×89.0
圧縮比 9.2
能 最高出力（PS/rpm）＊ 125/5,500
最大トルク（kgm/rpm）＊ 18.5/4,200


99-00 Spec B20 Stepwagon

エンジン型式 B20B
総排気量（cm3） 1,972
内径×行程（mm） 84.0×89.0
圧縮比 9.6
能 最高出力（kW［PS］/rpm）＊ 99［135］/5,500
最大トルク（N・m［kg・m］/rpm）＊ 184［18.8］/4,200

last variant of B20 is from CRV:
96 spec
エンジン型式 B20B
総排気量（cm3） 1,972
内径×行程（mm） 84.0×89.0
圧縮比 9.6
性能 最高出力（PS/rpm）＊ 130/5,500
最大トルク（kgm/rpm）＊ 19.0/4,200


97-98 spec (came in 2 flavours)

エンジン型式 B20B
総排気量（cm3） 1,972
内径×行程（mm） 84.0×89.0
圧縮比 8.8 9.2
性能 最高出力（PS/rpm）＊ 130/5,500 145/6,200
最大トルク（kgm/rpm）＊ 18.8/4,200 18.2/5,200


99-00 Spec
エンジン型式 B20B
総排気量（cm3） 1,972
内径×行程（mm） 84.0×89.0
圧縮比 9.6
性能 最高出力（PS/rpm）＊ 150/6,300
最大トルク（kgm/rpm）＊ 18.8/4,500

So, the difference is not just 4hp and 6tq. Interesting engine to work with, fun nontheless.

imported_gatherer

Also the RPM at which peak torque come in is lower on the B20 engines this makes a huge difference on the track (I've sat in cars with both engines and while I wasn't the driver the same guy was driving) and I have to say the B20Z with a type R transmission is an amazing combination (just don't expect much fuel milage on the highway )

imported_SaYjAiBaO

it's not only about peak power and torque. it's about the whole powerband. go on www.nonvtec.com there are some people making 170-180whp NA with no vtec. if you're going NA, the b18 will cost you less because the internals from other vtec b series are interchangeable. the pistons for example, you can get some p30 pistons off the jdm b16 and boost your compression ratio. while with the b20 you will have to fork out a lot more $$ for some oversize pistons. if it's just a daily, get the b20.