ka24de obd1 engine differences please 92 vs 95

[1hotsilvia]

I am considering purchasing a 95 5 speed motorset to build and put into my 92 automatic. The 95 ka is obd-1, but there are differences between the two motors I am unsure of. I work at a autoparts store and have found the block castings are the same, the head castings are not, the alternator is not the same, and the 5 speed trannies are the same.

Do the motors bolt up identical?

What are the differences in the head? Which ones better?

Any helpful info would be greatly appreciated.

I repeat, BOTH BLOCKS ARE OBD1

[DjPantsSpecR]

i have a 95 in my 92 automatic, coincidence? don't worry, its still ridiculously slow....

This has been covered a million times, but i have a lot of homework/studying to do and im not trying to, so here goes...

Motors bolt up identically, its pretty much the exact same block, inside and out.

The head differences are how the valve cover and front upper cover attach to the head. different diameter fasteners, adn two are changed on the s14. I don't believe there are really any physical differences in the head's design. so the better one is the one you can find more cheap parts for.

The 95 intake manifold is better, while its cams are not.

You can use its o2 sensor, but you cant use its exhaust manifold, unless you have the whole thing.

AC and AC bracket are different on the 95

coolant temp sensor may not be the same. Everyone says it won't work, but ive never actually tried to verify. One quick look a tthe fsm specs and i could tell ya, but i'm already doing a gang of searching work for you right here...

the moral of the story: The s13 driveshaft is a little longer, (you need a manual driveshaft to do this) but you can cut the collar off the 95 transmission and use it. THe block bolts up fine. Use the upper intake manifold from the 95 motor(with the sensors swapped from the 92), but use the lower intake manifold from your 92. I dont know if you use the 95 for TPS, or if you need an s13 manual TPS... Youll want some cam combo from both motors like 248/232 use the exhaust manifold from your 92. The AC bracket has to match the year of compressor you are using. S14 alternator can be used in an s13 car, but you need to modify the large ground cable, and you will have to use s14 alternators from now on.

i dont know how much searching it would have taken you to find this, but im pretty sure its not much as this has been covered a million times.

[mmm240]

sorry to thread jack, but i am looking at the next step for my 93 and i want to get a better flowing intake manifold and throttle body. no one seems to make this combo

my question is: is the 95 intake manifold worth it? what about the throttle body as well?

[DjPantsSpecR]

Xcesive motorsprots makes one for 549.00 or something ridiculous like that. It's literally the stock runners cut at a certain length. they then have attached a plate to which the manifold bolts up.

I love the design on this manifold actually. The runners seem to be decent length for streetable KA power (meaning some top end finally) and where the runners meet the plate has been radiused nicely to allow for a psudo-velocity stack effect. You then bolt on the "3/4 box" portion of the manifold, and apply a gasket. This is how we make the intake manifold for the U of M FSAE car.

Or you could just make your own, and have it welded to a cut length on your intake manifold. I've had sketches of this a while ago, but i'm considering posting some measured ProE drawings so you could have this made at your local machine shop whithout explaining anything. Unless of course you want to change the fron pattern for a Q45 Throttle body.

Otherwise, you could use either of these intake manifolds, and cut out a section of the runners. You could place your individual throttle bodies here and still use a MAF.

to answer your question... the 95 is worth it for a small bump in top end with a emager loss in low end, but you could just remove the butterflys in your stock manifold for much cheaper. You can either just unbolt the butterflies, or you can remove the entire assembly, but you need to fill the holes you leave behind.

Throttle bodies are the same, but you can always have it bored out as well.

[deviousKA]

You can run 8 injectors with 4 mounted to spray into the oem velocity stack built into the manifold (plenum).

Splitting the injector signals into batches and reducing each injector size by half, or by adjusting main global fuel rate factor (K number) within ecu.

This would provide 2 batches of 4 sequential firing injectors, only tradeoff being minor fuel puddling at lower rpm/load which could be offset by running smaller secondary injectors. This would apply small pulsewidth set for the larger primary injectors to the smaller secondaries, but would require the ecu global changes.

I will try set some manifolds up for this myself and do thorough testing on the ecu injector driver loads, worst case scenario being a resistor or capacitor level adjustment.

[1hotsilvia]

thanks for the info