I'm new to the motor classes of honda I was wondering what the numbers and letters mean i read somewhere that the 23 in a h23a meant it i is a 2.3 liter motor so what does the rest of it mean like a d16z1 what does that relate to

 

The first letter (1st digit) is the Series of engine. A, B, C, D, E, F, G, H, J & K and so on.

The numbers (2nd & 3rd digits) are approximate displacement in liters 18 = 1.8L, 20 = 2.0L etc etc.

The second letter (4th digit) is the version, A = 1st version, B = second version.

In the land of the rising sun (Japanese Domestic Market = JDM) this is all that will be found on the engine code.

In other markets there is a 5th digit, this is an export number or another version number. It can also be used to differentiate between VTEC and Non VTEC versions of the engine. F22B1 = VTEC, F22B2 = Non VTEC.

 

can you tell me what the ys and Zs mean

 

Not sure.... Are you talking Honda automotive engines or something else?

Personally I have never seen anything from Honda North America in the automotive field with a YS or ZS designation.

Can you give me some sort of reference?

 

a guy says he has a d16z1 motor what does the z stand for or a y in the same place

 

a guy says he has a d16z1 what does the z stand for or if it was a y in the same place what would that indicate

 

They are different versions and variants of the D16 engine. Each letter and number means a newer version and or variant of the engine, based on alphabetical and numeric order.

Here ya go;
http://en.wikipedia.org/wiki/Honda_B_engine
http://en.wikipedia.org/wiki/Honda_D_engine
http://en.wikipedia.org/wiki/Honda_F_engine
http://en.wikipedia.org/wiki/Honda_H_Engine

 

Thanks