difference between jdm and usdm

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Old Apr 20, 2009 | 01:42 AM
  #1  
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Default difference between jdm and usdm

potentially buying an 88hf the seller is claiming to have a jdm b16a. im not sure how knowledgeable or credible he is. i want to know if there is a way to tell a jdm motor from a usdm? -thanks
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Old Apr 20, 2009 | 02:06 AM
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Default Re: difference between jdm and usdm

VTEC?

I may be mistaken not living in the USA but as far as I know you guys don't get the B16a engine in the USDM. So if it's actually a B16a it will have VTEC which will be a dead giveaway.

Also engine number is printed on the block and on the VIN plate.
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Old Apr 20, 2009 | 04:04 AM
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Default Re: difference between jdm and usdm

Originally Posted by deanfarnaby
VTEC?

I may be mistaken not living in the USA but as far as I know you guys don't get the B16a engine in the USDM. So if it's actually a B16a it will have VTEC which will be a dead giveaway.

Also engine number is printed on the block and on the VIN plate.
we do get b16 in the states..but the b16 in the states are stamped as B16a2....go look under the hood when examining the car and see what is stamped on the block....if it stamps B16a then yes it is jdm, but if it has a digit behind it like B16a2, then the motor is usdm. Most USDM Motor will have "HONDA MOTOR CO." stamp on the valve cover
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Old Apr 20, 2009 | 06:32 AM
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Default Re: difference between jdm and usdm

That's right,

You guys get the A2 in your del sols like we do over here. - Forgot about that. I thought you were VTEC deprived

B16A1 is UKDM
A2 is UK or USDM

B16A without number is JDM and I believe that B16B is also JDM only

One way to find out is try to go faster than 115 mph Unless of course you have changed the ECU
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Old Apr 20, 2009 | 06:36 AM
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Default Re: difference between jdm and usdm

Does it matter where the engine is from? B16 is a B16.

Originally Posted by deanfarnaby
VTEC?
....
Also engine number is printed on the block and on the VIN plate.
All B16's have VTEC. The engine won't be printed on the VIN plates, the HF originally came with a D series.
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Old Apr 20, 2009 | 06:44 AM
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Default Re: difference between jdm and usdm

Considering between the B16a , 1,2 and B16B there is some small BHP difference, Different Cams, different compression ratios etc etc.

And on my car there are two ID plates. One for the Chassis, one for the Engine.

I clearly said I may be mistaken as I am not from the USA. The market is totally different over here i.e we get CRX MKII's with B series engines as stock, so lose the attitude. I was only trying to help the guy out as nobody else bothered.

Plus I'm well aware that all B16's have VTEC. I didn't realise he meant B16A (not b16a 1 or 2) I just thought he was unsure whether or not it was a B series engine
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Old Apr 20, 2009 | 07:33 AM
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Default Re: difference between jdm and usdm

dont forget the B16A3 lol
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Old Apr 20, 2009 | 09:06 AM
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Default Re: difference between jdm and usdm

Originally Posted by ~sp33~
Does it matter where the engine is from? B16 is a B16.
Not really...there are a few different variants. Ignoring the B16B and the USDM market, there are two distinctly different JDM B16A's: 160hp OBD0 version (EF8/9) and the 170HP OBD1 version (DA6, EG6).
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Old Apr 20, 2009 | 08:29 PM
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Default Re: difference between jdm and usdm

Originally Posted by deanfarnaby
Considering between the B16a , 1,2 and B16B there is some small BHP difference, Different Cams, different compression ratios etc etc.

And on my car there are two ID plates. One for the Chassis, one for the Engine.

I clearly said I may be mistaken as I am not from the USA. The market is totally different over here i.e we get CRX MKII's with B series engines as stock, so lose the attitude. I was only trying to help the guy out as nobody else bothered.

Plus I'm well aware that all B16's have VTEC. I didn't realise he meant B16A (not b16a 1 or 2) I just thought he was unsure whether or not it was a B series engine
I'm not from the US either, i didn't have an attitude, i just thought that you might have wanted to learn something. The HF was the base model, the US market didn't get DOHC VTEC in their 2nd gen CRX's.

That's also why i mentioned that there wouldn't be plates on the car, because the car never came with that engine.

Also you asked if it was VTEC, which is why i mentioned that all B16's came VTEC.
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Old Apr 20, 2009 | 11:05 PM
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Default Re: difference between jdm and usdm

Originally Posted by ~sp33~
Does it matter where the engine is from? B16 is a B16.



All B16's have VTEC. The engine won't be printed on the VIN plates, the HF originally came with a D series.
what about the SiR version of EF's. dont they come with b16?
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Old Apr 21, 2009 | 03:11 AM
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Default Re: difference between jdm and usdm

Sorry mate I took your words the wrong way. I thought you were being a keyboard warrior *****.

Here have a beer on me

I wasn't asking if it had VTEC. I wasn't sure if VTEC was released in USDM so I was saying "VTEC?" as in can you not use the presence VTEC to decipher weather or not the engine is USDM.

Still .... I learned something. Which is always nice :D

Cheers fellas
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Old Apr 21, 2009 | 04:56 AM
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Default Re: difference between jdm and usdm

this might help the OP.

http://en.wikipedia.org/wiki/Honda_B_engine
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Old Apr 21, 2009 | 05:53 AM
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Default Re: difference between jdm and usdm

Originally Posted by 0ne-Cam
what about the SiR version of EF's. dont they come with b16?
Last i checked the SiR wasn't released in America.

Originally Posted by deanfarnaby
Here have a beer on me
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Old Apr 21, 2009 | 01:22 PM
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Default Re: difference between jdm and usdm

so pretty much check the stamp on the block. the valve cover says VTEC as well as Honda Motor Co. but if theres no lettering after the B16 then it should be jdm from what im understanding...correct?
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Old Apr 21, 2009 | 01:49 PM
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Default Re: difference between jdm and usdm

Originally Posted by maverick31210
so pretty much check the stamp on the block. the valve cover says VTEC as well as Honda Motor Co. but if theres no lettering after the B16 then it should be jdm from what im understanding...correct?
if it says B16A then more then likely it is a JDM motor however if it says B16A1, B16A2, B16A3, or any other variant of B16 then it could be a JDM motor or it could be a USDM motor or hell for that matter it may be a EDM block but B16A with no number after the "A" is a JDM block i think... great no ive gone and confused myself...
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Old Apr 21, 2009 | 03:54 PM
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Default Re: difference between jdm and usdm

USDM B16A- B16A_ (HAS AN EXTRA NUMBER)

JDM B16A- B16A Thats all that will be stamped on the block

All usdm b16's were 10.2:1 compression and 160hp

1st gen B16's were 89-91 production and obd0 designation were also 160hp versions like the usdm model

2nd gen B16's were slightly higher compression at 10.4:1 They had a 60mm throttle body, better design intake manifold and resulted in 170hp and 113 ft lbs tq. These came in obdI and obdII versions
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Old Apr 21, 2009 | 04:47 PM
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Default Re: difference between jdm and usdm

You're from Anaheim? If you're going to purchase a CRX with B16 make sure its BAR because smog in CA is pain in the A&$... If not make sure it's smog already and it's converted to OBD1, so you'll have a easier life later on.

What you're looking for is like my set up..... It's a 89 HF



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Old Apr 21, 2009 | 10:36 PM
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Default Re: difference between jdm and usdm

Originally Posted by FOMULA91
You're from Anaheim? If you're going to purchase a CRX with B16 make sure its BAR because smog in CA is pain in the A&$... If not make sure it's smog already and it's converted to OBD1, so you'll have a easier life later on.

What you're looking for is like my set up..... It's a 89 HF



props on the set up! i know smog is gonna be an issue but i know people who'll pass it
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