What The Difference Between the JDM-A20A and the USDM A20A?

[BootMachine]

A buddy of mine is like

"yo JDM guy JDM" because he claims he has a JDM A20A in his garage. WELL!

I went to see it and it looks the same as my USDM A20A engine.

How can I tell just by looking at it if it is indeed a JDM A20.

ALSO...are there any internal differences known between the JDM and USDM engines?

Tnkx for any info!

[NXRacer]

thats a good question. everytime i try to get a 'jdm' a20a they try to pawn an a18 off on me.

[carotman]

They are the same

The vacuum lines should be different... that's all.

[BootMachine]

Originally posted by NXRacer
thats a good question. everytime i try to get a 'jdm' a20a they try to pawn an a18 off on me.

That happened to me...I drove to MTL to check out a "JDM-A20A"...turns out it was a stupid dual carb engine!

No disrespect to the dual carb peeps....side drafts are cool and old-skool and deserve respect for being carbs..

But disrespect to the guy that does not know the diff between a MPFI engine and a carbed engine!

[BootMachine]

Originally posted by carotman
They are the same

The vacuum lines should be different... that's all.

OK cool....

What about casting quality? Port size? Piston bore/stroke? Cam lift and duration?

All the same as the USDM?

What about throttle body bore size?

Does anyone know?

Gear ratios to the JDM tranni?