was wondering wether i should get a b20 from the crx forgot whats the other code for it. so whats the hp and torque diff from the b18b to the b20? how much hp and torque does the b20 have?

 

what is the block number and what kind of head?????

 

Go for the B20 from the CRX.

As for the hp/torque differences, those are easily searchable

 

i think there are 5-10hp difference and about 330lb/ft of torque difference. Depends on what you wanna do with the motor and your budget. But for either NA or boost application, i think B20 is superior.

 

oops i meant crv not crx....i sound like an idiot. lol

 

i just need a daily with a bit more power than the my stock ls engine.

 

OOh, CRV...

Stock for Stock, the power difference isnt all that different but you do get more torque from a B20. People who switch out to a B20 usually intend to either turbo it, vtec it, or at the very least build it up with high compression pistons. That's when having 2.0L would be worth the trouble.

However, if you just want a power increase from a stock B20, dont bother with it. Just build up your B18 and go from there.

 

get a used B18C.

 

get B20 and put Vtec head

 

The B20B has about the same topend as the LS motor, however it has slightly more lowend torque, which makes it more effective at stuff like passing.

The B20Z has a higher compression ratio, so it will make more torque and more horsepower across the band.

You will need to put a LS intake manifold on the B20 to get it to fit in an integra....but otherwise the block and head just drop in.

For racing purposes you probably won't see much difference, but for daily driving its a nice motor.

 

what are the specs on the b20z? is this the engine that comes out of the old preludes?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by importdays &raquo;</TD></TR><TR><TD CLASS="quote">what are the specs on the b20z? is this the engine that comes out of the old preludes?</TD></TR></TABLE>

No the B20A came out of the old Preludes and is not of the B-Series family. I believe the B20A was actually part of the A series from the late 80's Accords.

The Prelude version does not have the same engine mount points, nor use the same transmission. I think it also had several reliabilty issues.

B20B came from '97-'98 CRV and B20Z came '99 to like 2001 CRV...whenever the old body style stopped being made. Engines are very similar, except the B20B had a like a 8.8:1 compression ratio and the B20Z had like 10:1. So it increased the torque a little bit...maybe 5-10 more horsepower.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Westrock2000 &raquo;</TD></TR><TR><TD CLASS="quote">

No the B20A came out of the old Preludes and is not of the B-Series family. I believe the B20A was actually part of the A series from the late 80's Accords.

The Prelude version does not have the same engine mount points, nor use the same transmission. I think it also had several reliabilty issues.

B20B came from '97-'98 CRV and B20Z came '99 to like 2001 CRV...whenever the old body style stopped being made. Engines are very similar, except the B20B had a like a 8.8:1 compression ratio and the B20Z had like 10:1. So it increased the torque a little bit...maybe 5-10 more horsepower.</TD></TR></TABLE>

Nah, the b20b was the USDM version. It has 8.8:1 compression. The b20z is the JDM version. It has 9.6:1 compression. You are correct about the prelude version though.

 

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

Nah, the b20b was the USDM version. It has 8.8:1 compression. The b20z is the JDM version. It has 9.6:1 compression. You are correct about the prelude version though.</TD></TR></TABLE>

Dont make me pull out my Wikipedia!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wikipedia &raquo;</TD></TR><TR><TD CLASS="quote">
B20B
- Non-VTEC
- Found in: 1997-1998 CR-V
- Displacement: 1972 cc
- Compression: 8.8:1
- Power: 126 hp (94 kW) @ 5400 rpm & 133 ft·lbf (180 Nm) @ 4300 rpm

B20Z
- Non-VTEC
- Found in: 1999-2001 CR-V
- Displacement: 1972 cc
- Compression: 9.6:1
- Power: 146 hp (109 kW) @ 6200 rpm & 133 ft·lbf (180Nm) @ 4500RPM
</TD></TR></TABLE>


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wikipedia &raquo;</TD></TR><TR><TD CLASS="quote">
Partially unrelated to the Honda B-series engines are the B20A and B21A. By some, these are not considered to be part of the B-series group of engines because they are not compatible with any of the other B-series parts or chassis.

There were 2 versions of the B20A

The first generation of B20A engines was available in the 86-87 Prelude 2.0SI in Japan, the 86-89 Honda Vigor and Accord . It leaned towards the front of the car just like the A20A engine found in the same cars. This B20A produces 160 Hp and 140 lb/ft Torque.

The second generation of B20A was found in the 88-91 Prelude. The 88-91 Prelude B20A and B21A blocks are cast so they lay at an 18-degree angle leaning towards the firewall. This was done to please the exterior specifications for the 1988-1991 3rd Generation Prelude due to it's ultra-low hoodline which Honda dubs the "engineless design".
The B20A, B20A3, and B20A5 engines consisted of closed-deck aluminum blocks with thicker-than-average iron sleeves whereas the B21A1 had some special material.

The B21A1 was basically a re-worked B20A5 with an increase in bore to 83mm. The external block dimensions had to stay identical to the B20A5 block so Honda called upon Saffil to create a thin but strong cylinder liner called FRM (Fiber Reinforced Metal) which basically consisted of a carbon fiber matrix, aluminum alloy, and aluminum oxide to make a very strong cylinder sleeve. These sleeves are so strong that they often do not lose their factory cross-hatching marks after 200,000 miles! A lot of B21A1 engines burn oil and have low cylinder compression numbers because the FRM material is so strong that is tears up piston rings. Good news though, you can usually replace the piston rings without any honing to the sleeves and go another 100,000+ miles without any sleeve wear.
</TD></TR></TABLE>

 

Well ****...I guess I was owned. Sorry for the mis-information.