difference between jdm and us (p10)

[jbmays]

Hey,
Does anyone know if there is a HP difference in the us-spec motor and the jdm motors, assuming you used us-spec intake and exhaust manifolds? I just got a motor transplant to a used low-mileage jdm unit and the engine feels like it's got more power than 140. It felt like it had 140 hp before the engine transplant. Anyone know???????

[P10DET]

Originally posted by jbmays
Does anyone know if there is a HP difference in the us-spec motor and the jdm motors, assuming you used us-spec intake and exhaust manifolds?

The JDM Primera engine was rated for 150 PS which is roughly 145 hp. That comes from the additional half point of compression ratio and the tubular exhaust manifold.

Originally posted by jbmays
I just got a motor transplant to a used low-mileage jdm unit and the engine feels like it's got more power than 140. It felt like it had 140 hp before the engine transplant.

It did? How could you tell?

[jprimera]

And we have a diferent intake manifold

[jbmays]

Originally posted by P10DET



I did? How could you tell?

I have a dyno in my basement.
J/K

Just a rough estimate based on my personal experiences with other cars having similar power ratings and engine types.

Semantics?

[P10DET]

Originally posted by jprimera
And we have a diferent intake manifold

Well the 95-on US market engines there *is* a different head (low port) and different manifold. On the 91-93.5 cars the only difference is the EGR valve. It is otherwise the same.