nissanfan

has anyone ever dropped a KA24DE into an rx7? im specifically looking for an 86 if it makes any difference. i am trying to find any and all information on this swap.

also curious about sr swap, but thats not as important.

OWNED

If im not mistaken the KA24DE came stock in the USDM 240sx's right? The same slow *** nissans that even the owners dont appreciate and every owner has a engine swap on their minds.

Why would you wanna put one in your rx7? A Sr20DET or a RB25 or 26 would be worth it, but still too much work.

Custom engine and tranny mounts, driveshaft, ECU, wiring harness, possibly a TII rear or a nissan one. and the list goes on and on.

nissanfan

i have a small budget and i am personally a fan of the KA24DE. i dont need huge power like everybody that does those swaps. i just want a car. sounds like too much hassle for what it is.

OWNED

Dude how much of a budget are you on? Where I live I can get a JDM Turbo2 Engine for 800$!

nissanfan

im on a budget of $1200 for motorset, necessary parts, shell, and labor

flamin-roids

Uh why not get a 240? The point of getting an rx-7 is because its a rotary and its fast. You'll go through all that work to have a 240 that looks like a RX-7. Doesn't make sense.

nissanfan

just for the sake of doing something different, plus the KA is slightly more powerful than the rotory motor for this car. the rx7 has 146 hp / 138 torque wheras the dohc ka has 155 hp / 152 torque

OWNED

Dude! Buy a damb JDM engine, they are cheap and you get a guarantee at most good places.

Spend 800$ on an engine,
Put it in yourself
while putting it in you'll need some new random things.... the whole swap shouldnt cost you more than 1200$

Do it!

evileagle

iTrader: (1)

The last guy who did an SR swap ended up spending about $5500 after it was all said and done.

I think your budget is a little low.

aznpoopy

i also remember the sr20 in a rx7. seems like too much work to be worthwhile.

ka24de has its own following. alot of people turbo them ka-t and others put them in older cars (510). for low boost and under or around 250ish hp, ka-t is by far cheaper then a equivelant SR. parts are much more widely available and the engine itself is idiotically cheap. blow a SR and you can cry. blow a KA and you can spend $300 bucks and have a running car the next day.

if you have a 86 with a blown engine, just send it off to rotary resurrection and have it rebuilt. would be far simpler then swapping in a ka24de. rotary n/a isn't any less reliable either imo.

EfiniGirl

Hey aznpoopy, isn't dohc ka 155 hp/155 torque? Just checking...

jack daniels

as far as im awere that doest make a hol lot of difference i've killed 240s in my na rx

Dan H

For $1200, just buy an exhaust and save some change. A full exhaust upgrade does wonders for a rotary. And a KA24DE? Not much...

yerlee4

u should search... under my name or ka24de. its a cool concept with the ka being cheap and having potential but in the long its not worth it. only do it if your mind isset on it and if you have fab skills and hook ups.

aznpoopy

something like that. its idiotically weak for a 2.4liter engine, imo...

theres a post on freshalloy of ka24de with only a 80mm catback and filter... dyno'd 15whp / 8 tq at peak gain. while by no means an awesome jdm tyte 1337ness motor, the ka responds pretty good to n/a mods b/c of its large displacement. it really needs to breathe.

agreed... its a neat idea but ultimately its a waste of time and money. the performance/reliability isn't really different from the original n/a rotary and IMO it requires too much time/fab to be worthwhile.

Dan H

Interesting. I always thought while it was a strong enough engine to boost, the head design was horrible compared to the SR's.

yerlee4

actually the ka's valvetrain is better than the sr. the weak point of the ka is the pistons. with forged pistons the ka is very potent.

Whizbang

have you OWNED a ka24 motor longer than a year? My friend's 240 is slow as hell. Reason being they are a trunk motor used to make an inexpensive sports car. The rotaty motor will be faster than the 240 motor. Trust me. We tested this. Better than that they have no low end torque. your taling 1/4 mile times of high 16's. oooo....power...

seriously though, spare yourself. Do not use the ka24. you will be so pissed off later on in life.

aznpoopy

god... another moron calling the ka24 a 'trunk' motor...i think u mean truck. but anyway... the n/a 13b has less hp and torque then the KA. the only reason i would imagine a rotary to be faster is the weight.

uh... ka has OODLES of low end torque. the reason they are slow is b/c they run out of air above 5.5k rpms.

if ur friend is running high 16s in a stock 240sx then:

#1 his car is really fucked up or a sohc or
#2 his car is automatic or
#3 he can't drive.

while by no means a fast car, thats a good second slower then it ought to be for your average driver with a stock car.

if ur going to bash a motor do your research first. despite what super street says, ka is not a shitty motor and its quite comparable to the super hyped sr.

d0 Luck

you won't be able to feel a difference w/ that KA swap either. i have lots of friends rolling w/ those, yes they are slow, and yes, their cylinder head design isn't the best either.

if i were you, if you're looking for individuality, you might as well get the most total satisfaction for what you want to do

the SR sounds like a good choice and alternative for the KA

i'm a fan of it, and if the weather is good, i might be doing this swap soon

Whizbang

DAMN STRAIGHT THEY ARE SLOW!!!!!!!!!

pills

Any of you guys own a 240? Well I do. Listen to the guy above, he knows what he is talking about.

The KA24DE loves forced induction. Hell, it can hit 200hp AT THE WHEELS at only 6psi of boost... thats average for the KA. The KA is getting loads of aftermarket support too.

It is not a "truck" engine. Did they put the KA24 in nissan trucks? Yes they did, The KA24 in the 240 is not the same thing. The reason why its called a truck engine is because of the longer stroke, it doesn't rev as high, but it creates plenty of low end torque. Afterall, torque is what makes driving fun.

You can say that a KA24 is slow, but if you think about it so is any small displacement N/A engine. Take the turbo off a RB26, think its very fast? nope! Take the turbo off a SR20, is it fast? NOT REALLY!

Its a great engine that gets no respect...

Your welcome

dookie

I have to semi-disagree on you with that. The n/a SR20DE on the silvia's and 180's in japan could probably beat a 240 since the SR has an actual powerband unlike the KA. I know this because I have a 240 and I beat the crap out of it, it just dies at 5.5k rpm. Mind you that KA does have great torque low-mid range. I love off the line jumps on preludes, until their v-tec kicks in, I can hold them.
But the KA's valvetrain is excellent, it surpasses the SR's greatly. The SR's valvetrain was just a cost-effective thing nissan did. That's why we don't have the CA18DET anymore, that was nissan's greatest 4-cyl motor. BTW, the only thing that is used on the truck motor that's on the 240 are the internals, that's about it. The head and all accessories are completely different.

aznpoopy

the sr20de n/a is slower then the ka24de. the sr20de revs higher and produces more at higher rpms. at peak however, it still has less torque, less hp and .4 liters less displacement. and since it revs higher it takes longer to get there.

but like i said, neither is a super engine anyway.

ka-t is very potent and very cheap, if you want to go that route. some ppl dont want to deal with the hassle and get a sr20det. either is fine, as long as you know why you're getting it, and your reason isn't b/c super street told you to.

btw thanks for the backup, pills.

Whizbang

i vote he puts a yugo motor in there. Oh yeah, 65 hp to the crank.