91-93 vs 95-98 KA

[93DriftMachine]

What are the differences between the 91-93 KA and the 95-98 KA. Doesnt the 95-98 have a higher compression and variable valve timing. While the 91-93 has a lower compression and no vvt.

[:: orion ::]

No KA motors had variable valve timing...ever.

And like I posted in that other thread:

All KA24DE motors from a 240SX have the same compression, 9.5:1 Although you may have read in your "Chiltons" or online that the S13 motors are 9.2, they ARE NOT.

Big difference are:

'91-93 had better cams (240/248 vs 232/232 for S14)

'91-93 intake manifolds had secondary butterflies

Front cover/valve cover are slightly different

Head, valves, pistons, crank, rods, etc...all the same.

- Brian

[:: orion ::]

Oh...and S13 had external dist coil, S14 is internal coil.

...and No AIV on S14s.

[TheOne]

as far as i heard the S14 had a better ecu tune than the S13's, thats why those have smaller cams but same or 5hp over.

[93DriftMachine]

Hey Brian thanks for taking the time to answer my question. I also have another question. I would like to remove my PS and maybe my AC. I have a 93 240sx. How would I go about doing this. It looks like I can not remove it because where would I adjust the tension for the water pump and crank pullys.

[:: orion ::]

A/C is easy...it has it's own belt. Just cut it off and then remove the compressor, etc...

PS is not as easy...you could find a belt that was *just* short enought to fit over the water pump pulley, or make a tensioner that would fit where the PS pump used to be.

- Brian

[TheOne]

wouldn't that like make the water pump run faster than normal and maybe cause some sort of bad thing though? havin just the pump and the crank runnin without a tensioner of some sort?

[Dookie]

s14 connecting rods are bigger i believe

[Dattebayo]

Head, valves, pistons, crank, rods, etc...all the same.

Dookie, please read the post again. Its right in front of you.

[:: orion ::]

wouldn't that like make the water pump run faster than normal and maybe cause some sort of bad thing though?

It shouldn't...

The speed is determined by 2 pulleys...the crank and the water pump pulley.

You can route the belt over another pulley of a different size, but that does not change the speed at which the crank pulley is turning.

So crank pulley size and speed + water pump pulley size = speed of the water pump...no matter how many other pulleys the same belt turns.

- Brian

[93DriftMachine]

Dont some 240sx come without PS. Could I replce those parts onto my 240sx.

[:: orion ::]

I don't think I've EVER seen a 240SX without pawer steering.

But apparently they make S14's with roll-up (non-power) windows...and I've never seen that in person either, so...??? FWIW...

- Brian

[Dookie]

Dookie, please read the post again. Its right in front of you.

Well 2bn_s13, according to Nismo Freak in another post a month ago or something, the s14 has thicker rods that the s13, im just going by his information