Difference between 91-94 KA24de and the 98' KA24de

[OM3GA]

What is the difference? besides the obvious OBD1-OBDII, Im talking like straight Long block it looks a little different but i have heard something about the internals being different like the cams and i have also hear something about the timing chain guides. I just want to know for sure I just picked up a 98' KA24DE with 80k miles!!! and i have a 93' hatch so i started to get curious about the internal differences. Im obviously using the S13 manifold... well im using the xcessive manifold that i have on right now but yeah i know your supposed to swap them. And also the distributor from my ka because the S14 distributor has an internal coil if im not mistaken. =] please let me know i plan on rebuilding this ka for turbo most likely i have changed my mind i was originally going to do high compression NA because i was afraid of the reliability of the KA-T setups but i have heard good things about E-Mance tunes and that its really simple and trustworthy. I plan on just doing SR injectors SR T-25 and a walbro fuel pump..

[RCCC_DRiFteR]

obviously more smog equipment on it. I also remember the intake manifold is different a few more plugs on the motor and also that the valve covers are different as well. I think pretty bottom end is the same but I also heard something about the cam being different on the s14 KA. isn't that the "hot cam" thing?? take either intake/exhaust (cant remember exactly) out of the s14 KA and throw it in the s13 KA intake side and now you have a cammed motor that has a lope to it now

[OM3GA]

Idk i have heard the opposite about the cams the 91-94 cams are better then the S14 cams, yeah i know about all the smog equipment and stuff im talkin take a long block s13 ka and a long block s14 ka and look at their differences, no manifolds on them just long block valve cover to oil pan.

[RCCC_DRiFteR]

I just remember there being something fish about the intake manifolds being differnt though!! cause my friend bought a long block '96 DOHC motor and we found out that the s13 manifold wouldn't fit due to studs alignment or something like that. it was like 8 months ago its hard to remember exactly and the valve cover shape is different so thats why it doesnt work from a s14 valve cover to a s13 valve cover

[DMan II-40]

S13 runs 240/248 CamsS14 runs 232/232 CamsAlso in 97 and 98 they made it have duel timing chains.

The cam swap that has dynoed the best is 248/232. And the reason the valve covers don't fit is because the S14 ones has one extra bolt hole in it. And yes, in 96 they added OBD II emissions. The 95 Ka is OBD I/OBD II since they were produced in 94 they only put half of the OBD II equipment on them (*atleast I read that somewhere)

[RCCC_DRiFteR]

Sorry I'm not the most helpful person but I didnt wanna just leave you hanging with info at all

[DMan II-40]

I plan on just doing SR injectors SR T-25 and a walbro fuel pump..

Dude, if your going to build up the engine you should run something better than a T25. I'm only doing T25 because I only want low boost for DD. Just so you know you will need more than E-mance, SR 370cc, T25, and a walbro. I assume you know that tho. And if you don't....well you have a lot of reading to do.

[RCCC_DRiFteR]

Bay area i see.....

[tonynalli]

The differences are the distributor the intake temp sensor, the smog stuff, the cams and the exhaust manifold. The intake manifold is the same and will work. Other then that the motors are identical.

Dont waste time and money on a high compression motor. If built well, a small turbo like the t25 would suffice. If you can, try getting a t-28 more power and more room to grow.

[OM3GA]

S13 runs 240/248 CamsS14 runs 232/232 CamsAlso in 97 and 98 they made it have duel timing chains.

The cam swap that has dynoed the best is 248/232. And the reason the valve covers don't fit is because the S14 ones has one extra bolt hole in it. And yes, in 96 they added OBD II emissions. The 95 Ka is OBD I/OBD II since they were produced in 94 they only put half of the OBD II equipment on them (*atleast I read that somewhere)

The s13 has dual timing chains upper as well

I just remember there being something fish about the intake manifolds being differnt though!! cause my friend bought a long block '96 DOHC motor and we found out that the s13 manifold wouldn't fit due to studs alignment or something like that. it was like 8 months ago its hard to remember exactly and the valve cover shape is different so thats why it doesnt work from a s14 valve cover to a s13 valve cover

Thats odd... Xcessive manufacturing makes that intake manifold for the DE's and it works on all of them.. And its using the stock upper part of the manifold... I believe it should work fine i dont know what problem you ran into though..

Dude, if your going to build up the engine you should run something better than a T25. I'm only doing T25 because I only want low boost for DD. Just so you know you will need more than E-mance, SR 370cc, T25, and a walbro. I assume you know that tho. And if you don't....well you have a lot of reading to do.

What else do you suppose i need? besides all the obvious stuff that im not going to sit here and name.. Im running either a JWT ecu or an E-Mance tune and ill get a wideband and stuff and the motor internally is going to be fully built low comp pistons and stuff... What else are you thinking i need? I know about all the oil line routing and everything but what are you hinting towards..???

[DMan II-40]

dude, if ur gonna fully build it, you might as well go with a t3 or larger. All I did to learn about turboing the KA was read as much as I could in the KA-T section. There is so much to learn about it.

[OM3GA]

I just want a really small turbo setup its my DD and i want it to be really reliable.. I dont wanna have to worry about a/f ratio messing up or anything i want it to be basically like a stock sr setup but not an sr.. Reliability is key and as far as power goes im not lookin for more than 250hp in my opinion now its got enough power stock with the mods ive done.. I was gonna do a high compresion na build.. i might still but ive been thinking about turbo more and more maybe 8-10 psi on that t 25..

I have heard the 97 and 98 ka's do not have the upper timing guides.. is this true?

[got chub]

as far is i know (yes I'm repeating what other said) the VC, head, distributor, intake mani, lower timing(changed to dual in 95), upper timing cover, and cams.

there are 3 head for the KAs. 1 s13 and 2 s14. the head changed at the end of production in 98. it has one less cam cap in the rear and it continued that way till '01 in the frontier

[OM3GA]

But what about the guides? I have heard that in the 98 ka's Nissan themselves stopped putting the upper guides in because of all the complaint of rattling noises..

[got chub]

my 98 head that i have has the whole for the upper guide but it was not on when i got it and the person i got it from said when the took the VC off it was not there either... the were the original owner of the vehicle

[OM3GA]

Sweet!