Hello everybody! I wanted to ask one question that has been on my mind some quite time. I need the facts out. I'be heard some say that usdm b16a2 are way better than b16a is that true? please help!!! I am about to buy one either b16a2 or b16a and swap in my ek 4 door. Your help will be greatly appericate!!!

 

in my opinion b16a2 would be for me just because its newer...

 

newer perhaps, but mileages on it are unknow that's for sure. Which is better.... does usdm b16a2 pull hard than b16a? that's what i wanna know.

 

usdm engines are lower compression meaning less horse power, jdm engine has 10 horse over the usdm...i have the jdm b16a in my 4door ek and it pulls hard. although if you buy a usdm engine from a local junkyark you can get a clean one and get documented miles so you know what your buying you kinda take a bit of a risk in buying a jdm engine online sometimes because they may say it has around 50k on it but most times there makeing it up. also if you go with the jdm b16a you will have to convert it to an obd2 wich isnt hard but makes the swap a little more difficult. either way there both good engines and its gonna be alot better than the single cam so you cant go wrong.

 

Yeah, only difference really is the compression like 08zx14 said. 10 hp difference. I would consider the piece of mind that having documented mileage is worth valuable enough to make that difference up. Go for one you know what you are getting with.

 

B16a Power: 158 hp (118 kW) @ 7600 rpm & 111 ft·lbf (150 N·m) @ 7000 rpm
Compression: 10.4:1

B16a2 Power: 160 hp (118 kW) @ 7600 rpm & 111 ft·lbf (151 N·m) @ 7000 rpm
Compression: 10.2:1

 

^

if it's an obd-1 b16a or newer, it will have 170hp compared to the US 160hp. Now... that is all considering a JDM ecu and higher octane fuel.

So really? I'd say that a healthy B16a2, and chipped p28 b16a (sirII) running on american fuel, would put about the same HP out.

The JDM SiRII supposedly have a slight bump in comression, and a bit more aggressive cam profile, along with a bit better tune on the base map. BUT... in Japan, they can get AT LEAST 94 octane at the pump. So.... I'd say go with whatever is in your budget. As far as which pulls harder? depends on the chasis, and tranny really.

a first gen b16a with cable tranny in an EF is gonna feel like it pulls harder than a 2000 civic si. As far as I know, the hydraulic b16 trannies are the same across the board (except the CTR of course) and the cable b16 trannies are geared a bit shorter with less top speed. (think 5k rpms at 75 mph in 5th)

 

b16a2 has duel valve springs on the intake side :-/

 

thanks guys... I think i have my mind set on b16a2.

 

Make sure it has low mileages. GL

 

They can be if you get suckered into buying a jdm automatic short block.

Here's all the tid bits on B-series, http://en.wikipedia.org/wiki/Honda_B_engine

 

The p28 was only came with single cam VTEC's, the jdm b16's used the p30 ecu. The compression went from 10.2.1 to 10.4.1 by simply changing the pistons. Don't qoute me on this, but I believe the cam profiles are all the same except the automatics. Cable trannys are all longer geared except for the ys1 which is identical to the y21 as in gearing. Again all cable trannys except the ys1 have a 4.1 final instead of a 4.4 final (again don't qoute me but theirs also a few varients as to what length certain gears are), so they are able to reach a higher top speed.

http://www.fatboyraceworks.com/gears/

Also when you convert the japanese octane, they're only runing 95. Also the CTR tranny is identical to the y21 tranny (in terms of gear ratio's), only its the s4c and is designed to deliver power above 8500rpm.

 

sweety pie.. the JDM versions are most always likely going to be better than its usdm counterpart..

 

all good info, but why quote me when you said this? I don't recall saying that the p28 came with a b16?

 

It doesn't matter if he uses a "CHIPPED" P05/P06/P08/P28/or P30 unless he's trying to get it reffed and lives in Cali. Chipped ECUs/ECMs have custom ignition and timing maps (along with vtec/redline/fuel cuttoff/injector test circuit/open loop/etc). A chipped P06 can be identically programmed to a P30 ecu.

Just a heads up for the OP. Also, makesure along with chipping the ecu is in fact a VTEC ecu or has been chipped for such.

 

92-95 obd-1 b16a,b16a2 same whole motor it all usdm and jdm engine code parts thats all but if your talking about the obd-0 b16a the cams are not aggresive compare to b16a2 cams.