Euro B20A -> JDM B20A

[McNick]

Hi!
few weeks ago I've started to looking for B20A to replace my A20A3. But on J/Y around I found lot of cheap Euro B20A only and anyone of JDM one. Yes, 137hp is good, but not too much. Any one here knows somesthing about Euro B20A (137 hp) to JDM B20A (160hp) conversion?
Thnx in advance and sorry for my EnGLisH

[cruznz]

try these threads for a bit more info.........https://www.3geez.com/showthread.php?s=&threadid=87

https://www.3geez.com/showthread.php?s=&threadid=86

https://www.3geez.com/showthread.php?s=&threadid=90

[McNick]

So... c'mon guys!
What is the difference between this two engines?
Can I convert 137 hp B20A to 160hp?
IMHO - yes. But how?

[shepherd79]

hey man,
First make sure they came out of 3geez. most likely ero B20 came out of prelude.

[McNick]

because, except of a unmounted engines, I have seen some of B20A 16V engines under the hood of drivable Accord's. I can drive this car (with b20a engine, but without windscreen, some dors, without headlight and so on.., and then, if I satisfied, buy motor, tranny, axles and whatewer I want.

[carotman]

The main difference that I noticed were Cams and ECU

[RCracer]

When I put a B20a2 into my aerodeck (god I miss that car) I got some cams from a JDM b20a I found in a breakers yard.
The JDM B20a engine had thrown a rod and was destroyed but cams were fine .
When I used the B20a2 with the JDM cams I ran the car on a A20a2 carb and it had more power than when I drove it in the B20a2 parts car with EFI.

The piston sizes were the same as were the valve sizes. (please note I could only measure them with a ruler due to where the engine was.
The camshafts were noticably differerant though.

[McNick]

Does it mean the ECU is the main part to get 160hp from EuroB20A2/8?!
Because vacuum advance are used in both A20A3 and B20A2/8 according to FAQ description I can use my A20A3-ECU instead of EuroB20-ECU in B20-powered car and rich 160hp?
Am I right?

[McNick]

... or another stupid idea - using Prelude B20A ECU...
C'mon guys! A20A3 rebuilding or b20a swapping are planned for this summer!!

[foobari]

Any new info on the Euro B20A2 -> JDM B20A conversion? I also have the Euro B20A2 Accord (137or 138hp depending on the info source) and I've been thinking about the 160 hp B20A JDM upgrade. So far I've been going through the FAQs and old posts, but there just doesn't seem to be any real hard facts of what should be changed to get the 160hp out of B20A2. Only the cams, or the cams and ECU, or even something more. So please share your info if you have any hard evidence!

[RobT5580]

From talking to Openloopmotorsports the other day they said the B20A5 ECU did help it out a bit. The did say they had to change the speed sensor because the ECU will throw a code and with the new speed sensor they lost the speedometer function.

[McNick]

well. My A20A3 rebuild is done 10k km ago.
And I have enough time to study the Euro and JDM B20A difference. But, after my contacts with guys from far east of Russia (lot of japan right-hand cars there), I got the information about difference in power measurement.
They said following:
for Japan market power is measured in ph on the flyweel,
while in Europe power is measured on the weels.
Due JDM measurment type don't include losses on transmissin, JDM power is higher than same engine in Euro.
Is this possible? Does 137hp (on the wheels) are the same as 160hp on the flywheels.
Save my JDMB20A-dream, pls! Thank you in advance.

PS: I found a JDM EPC catalog (incl. CA3) in Internet. The introduction is in Russian, but internals is international (pictures and numbers)...

[foobari]

Originally posted by McNick
Save my JDMB20A-dream, pls! Thank you in advance.

PS: I found a JDM EPC catalog (incl. CA3) in Internet. The introduction is in Russian, but internals is international (pictures and numbers)...

Well, please check Paul's website:

http://www.pauldesign.ru/honda/about.html

There is some technical info about the European B20A2 and JDM B20A engines:

B20A2: 137hp@6000rpm / 173Nm@5000rpm
B20A : 160hp@6300rpm / 190Nm@5000rpm


BTW, please post a link to that JDM catalog!

[McNick]

I think one of PaulAerodeck's pages sources is Greatest 3geez Foundation site. To be sure I have to ask him about it.
But in any case rpms for max.power has a difference. This is possible confirmation of real differences in Engines.
For me Q is still open.

JDM Catalogue:
http://www.auto-nsk.ru/hondasan/