What increases the compression in 95+ KA's???

[DamnedButDetermined]

The compression jumps from 9.2:1 to 9.5:1 I believe from 91-94 to 95-98... What changes?

Thanks,
Zac


EDIT: I changed the compression numbers for easier reading and accuracy

[brndck]

Where are you gettin this info from?

[Memberofthe600hpkaclub]

They stopped running head gaskets stock because the machining process was so refined

[nismolvr]

The compression jumps from 9.1 to 9.5 I believe from 91-94 to 95-98... What changes?

Thanks,
Zac
im sorry i dont follow. you trying to find weak cyliners right.? I think you reading comp gauge is wrong. if compression is 9.1 to 9.5psi? you def have dead cyls. keep it simple , pull spark plug wire after car has warmed up.one at a time , wich ever cyl has the bigest rpm drop is good working cyl. pul em one by one at a time and if a cyl has no change in rpm thats your parasitic non working cyl. alot of times its bad valve seat carbon deposits not letting valve seat completely.clean em up ,

[booey13]

^hes talking compression ratios, not compression per cylinder. All de's are 9.5:1.

[DamnedButDetermined]

Where are you gettin this info from?

It is from the NICO Technical Guides...
Engine Options: Information and Resources Guide (http://www.nicoclub.com/archives/engine-options-information-and-resources-guide.html)

General:

- From 1991-1998 Nissan 240sx
- 2.4 liter/145 c.i. displacement, 89.0mm (3.50393 in.) bore x 96.0mm (3.77592 in.) stroke
- Cast iron block, aluminum head
- DOHC 16 valve solid lifter configuration
- CR: 91-94 – 9.2:1, 95-98 – 9.5:1
- Weight: ~ 465-500 lbs not including transmission

Peak HP – 155 @ 5600rpm
Peak Tq. – 160 ft/lb @ 4400 rpm
---------------------------------------------------------------

Sorry I must have typed it wrong in the first post because it should be 9.2:1

Zac

They stopped running head gaskets stock because the machining process was so refined

Do you mean they stopped using thicker head gaskets? Because I haven't taken my new motor apart yet (95 ka), but I am pretty sure there is still a head gasket there.

Zac

im sorry i dont follow. you trying to find weak cyliners right.? I think you reading comp gauge is wrong. if compression is 9.1 to 9.5psi? you def have dead cyls. keep it simple , pull spark plug wire after car has warmed up.one at a time , wich ever cyl has the bigest rpm drop is good working cyl. pul em one by one at a time and if a cyl has no change in rpm thats your parasitic non working cyl. alot of times its bad valve seat carbon deposits not letting valve seat completely.clean em up ,

I hadn't thought of testing for a bad cylinder that way before. This wouldn't cause any damage would it? I guess you better pray that none of your spark plug wires are cracked because that would be one hell of a surprise if it were ;)

Zac

[blueshark123]

Do you mean they stopped using thicker head gaskets? Because I haven't taken my new motor apart yet (95 ka), but I am pretty sure there is still a head gasket there.

Zac


he was being sarcastic

[booey13]

Looks like you ignored my previous post. I suggest you looks through the fsm's instead of reading information that was probably copy and pasted from Wikipedia.