Well, all you guys have amazed me yet again with more random facts.....i had no idea the b20 even exsisted! Now, how hard/easy is it to put in a 90 crx si? what kind of mount kit would i need? and i can only find longblocks on the net.....i know i need axles and shiat like that....can anyone shed some light on this topic and yes....i did do a search...unless im retarded i didnt see anything,but i have been fooled before. lemme know. RYan

 

I'm guessing that you would need to approach the swap like the other b-series swaps (especially something like the b18a/b). You will need the b series mount kit, along with a cable b series tranny (anyone know the best for the b20 aplication?). I think you can swap intake manifolds from an obd0 b18 so you dont have to convert your car to obd2. The axles would depend on what tranny you got (do a search on that, tons of posts). The ecu is yet another question, because you would need something like a b18a ecu, but is the fuel curve good enough? There are people who have done the swap here, hopefully they speak up.

edit: as far as being possible, of course it is! the b20 block is just a little taller (but maybe the head is smaller than a b16?), so maybe you'll be a little more prone to rubbing/scraping header than the b16.


[Modified by ricodemus, 4:07 PM 7/9/2002]

 

B20 owns you!

http://www.crvtec.com

Check that out, it has some good B20 info...

 

ask beatdown88hf he has a b20

 

yes, just like any b series motor into a CRX.

u'll need 90-93 integra axles i believe, and here are some archived topics for you

https://honda-tech.com/zerothread?id=199775
https://honda-tech.com/zerothread?id=192790
https://honda-tech.com/zerothread?id=192702
https://honda-tech.com/zerothread?id=211853


[Modified by poison, 2:15 PM 7/9/2002]

 

The engine is exaclty the same as an LS, just the valve cover is different, I doubt it's any taller though. A b-series mount kit(Place Racing, HAsport, HCP) and cable tranny are in order

- The CRV intake manifold will have to be swapped for an LS version(90-93 would work best) or an LS skunk2 manifold would be even better.
- All obd-0 electrions need to be used... 90-91 LS injectors, distributor, and ECU. Though the LS ECU would prolly need something like an S-AFC to get the fueling proper
- You'll prolly have to swap your CRX/Civic wire hanress over, not 100% on that one, but it's not hard either way.

 

The B20 valve cover is rather tall, I know that much for a fact. It wont work if you use a LS intake manifold because it has a hole in the top of it... you'll need an LS Valve cover as well I believe.

Aside from that, its the same as any other B series swap, minus the VTEC wiring... so basically its an LS swap.....

 

I have a B20 in my 1988 HB and have had no problems with it. The B20 block is the same height as the B18B block. And the B20 head is identical. So clearance is no more a problem with this motor than the B18A/B18B. As for electronics, you might want to consider rewiring to use a P75 ECU, as this is the best ECU out of the box for this motor. MUCH better than the lean 1990-1991 PR4.

 

Should you build the bottom end or leave it stock?

 

Correction B20 is not taller only difference from a B18 is the bore and intake manifold. You need to swap the b18 intake on the B20 or any aftermarket made for B18 should do.

 

Sorry...i didnt read storminmatt's reply, he's right... About the other q about building...its always good to rebuild but depending on what your ultimate goal is...NA or Induction...(high or low comp)

 

I'm thinking of boosting later in a year.

 

If you are going to boost and build just buy a B18B, re-sleeve bore it to 84mm. Presto 2.0L!! You are going to spend large amounts of money anyways on re-building but you can save a few bucks buy not buying a b20.

 

if and when you put a b20 in your be sure to get a b16 drivers motor mount

 

will a b16a distributor work on a b20?

 

Best fit dizzy would be a 90-91 'teg. It'll mate up to your ** OBD-0 ** electronics as well

**EDITED ** : My bad, but technically 88-91 is OBD-1 version a, 92-95 is version-b......it just makes it easier to call it OBD-0


[Modified by Speed PHreak, 5:33 PM 8/5/2002]

 

you mean obd 0. i'm trying to figure out if i can use a b16 dizzy though, cuz i have one laying around.

 

I know you can use the 90-91 LS dizzy on the B16's you just have to chop off a leg......I think. But electronically the 1st gen B16 dizzy will work. I'm sure it'll bolt-up with maybe some minor modifications.

 

i guess i'll find out later today. my b20z just arrived at the shop where my car is. i was looking at the motor..the b18a dizzy mounts look like a t, right?

 

Transmission: S1, J1, A1, Y1, or YS1
Mounts: Hasport M88-B16-10
ECU: PR75?
Axles: The proper axles can be constructed using 86-89 Integra axles with 90-93 Integra inner joints. If the 90-93 Integra intermediate shaft is used some people opt to use 90-93 Integra axles. I would suggest changing the outer joints to that of the 86-89 Integra.
Shift linkage: Hasport custom linkage or shortened 90-93 Integra.
Electrical differences: Modify the engine harness to fit.
Upper radiator hose: 90 Integra, trim to fit.
Lower radiator hose: 90 Integra, trim to fit.
Throttle cable: 90 Integra
Clutch cable: Stock
A/C: Use Hasport AC bracket with stock A/C compressor.
Special instructions: Make a dent on the left-hand frame rail for alternator pulley clearance. Must change left side engine braket to one from 90-93 Integra to use Hasport mount kits.

I pretty much copied this out of "Honda/Acura Engine Performance" written by Mike Kojima.

 

i tried last night and the top hole lines up and it seems to fit ok. will i be safe with just one bolt holding the distributor on?

 

also, i was wondering if i need to do any harness modifications for sensors in the block. since i'm using the 90 teg ecu i won't need the knock sensor. what else do i need to wire up as far as electronics on the motor itself? i'm going to use a 90 ls intake manifold, so that will plug in fine.