95 headgasket = 91 headgasket???

[Bbandit]

as you all know
i have a 91 coupe with 166k mil
im going ka-t soon so im gonna have to swap a lower mileage ka
im going to be getting this 95 ka
but i will still use 91 cams, 91distributors, and 91 ecu
im planning to stay obd1...
but now im quite confused
is there any difference between 91 ka and 95 ka? internally and externelly
as far as i know.. the only thing different is the manifolds and cams
will an s13 fel-pro headgasket fit s14 ka??
http://www.ka24de.com/ <-- felpro headgasket
i emailed them but they're not sure that it will fit

[FRpilot]

i think s13 kas have lower compression pistons or they're slightly stronger to handle boost better, but still should be upgraded for reliability. im not completely sure about this but read a thread a long time ago between the diferences of s14 ka nad s13 ka so i dont really remember that well.

i saw that site on 240sx.org. they're offering a gb price for arp headstuds for ka. actually, that site has pretty rare parts for ka.has anyone ordered from them? i think im going to start ordering some stuff from them when the time comes and started prepping a spare ka block for turbo.

[AceInHole]

Originally posted by FRpilot
i think s13 kas have lower compression pistons or they're slightly stronger to handle boost better
Late S13 SOHC pistons were lower compression. 8.6:1 IIRC.
S14 pistons were "supposedly" stronger. I'm not sure that it's been proven that S13 pistons weren't hypereutetically(?) cast as the S14 pistons were.
[/B][/QUOTE]

[AceInHole]

Originally posted by Bbandit
is there any difference between 91 ka and 95 ka? internally and externelly

Just diff's between the '91 and 95
S14 KA has a more "open" oil send gally through the block to the head.
S13 upper chain tensioner is slightly different, seems to only be the bracket is different.
S13 head has bolt holes on the back for a plate with vacuum solenoids on it.
S13 valve cover is slightly different (1 bolt difference)
S14 valve cover gasket set is only 2 peices, compared to the halfmoon peices being seperate on the S13.
S14 has a slightly different head/ block bolt pattern. 1 small 10mm bolt is different. Doesn't make a big deal, though.


as far as i know..
the only thing different is the manifolds and cams
will an s13 fel-pro headgasket fit s14 ka??
http://www.ka24de.com/ <-- felpro headgasket
i emailed them but they're not sure that it will fit

Yes. 1 bolt hole on the head (near the timing chain cover, exhaust side) will need to be modified.