I know I know.. another SR vs KA-T but plz read

[MikeMurphy]

thanks for the bore and stroke correction =)

[toki]

wow ok, this thread has officially made my **** list, but lets get real here people.

SR: Boosted Stock. Great. Hooray. Woopdy fvckin doo, you get ~180whp for atleast 3 grand (And I say alteast 3 grand, and mean, ATLEAST 3 GRAND unless you are some super duper mechanic who fixes things like mageyver)Great ok you just spend 3 grand and you've got a 15 second car now. HOOORAY. Now you need to start buying boost controller, bigger injectors, better turbines, new fuel management, fans, bigger radiators, FMIC, etc etc. another 3 or 4 grand can pile up quiker than bunnies make the magic. great

KAT: What horribly factory tuned motor. When I say tuned, I mean balanced. I am talking more about the SOHC here than the DOHC, but with balancing and lightweigh internals, you can easily take it out to 7500rpm. Quit whining about it's big block chevy redline. Oh, and you still make power at 3k. Ok, lets start this off right. Motor internals and little doo dads, 2k prolly. That's a reasonable price. Now you need your parts. Turbine, FMIC, Piping, MAF, Injectors, etc etc. What do you know...you just hit another 2-3 grand. OH. WAIT. but after all that. you are making 400 at the wheels or more.

point is kids, with the KA, you do it right the first time, with an SR, to make real power, you just pushing the motor too hard, and you have to replace essentially everything on it. Yeah. 2.4L love.

[MikeMurphy]

and mean, ATLEAST 3 GRAND unless you are some super duper mechanic who fixes things like mageyver

omg i just about choked on my hamburger when I read that!

[stilesg57]

I'm KA all the way, but just to play devil's advocate here, what about the weight savings of the SR? Smaller and all aluminum, it's gotta weigh less. Doesn't the transmission weigh less too? And we're talking against a stock KA here, a full turbo setup will probably add around 40+lbs. to a newly converted KAT engine bay.

So, if the goal is as light a car as possible in the 240 chassis, wouldn't you want the SR?

What are the weight differences between the SR engine and transmission and the KA engine and transmission? Anyone know off hand?

[MikeMurphy]

there is very little weight difference. Not sure of the specific number.

[MainEvent212]

if the KA is better why do all the japanese guys use SRs?

[SingleCamSam]

For the same reason we prefer the KA. Because it's already in the car.

[lessthanjakejohn]

if the KA is better why do all the japanese guys use SRs?

slap to the head!

[rco8786]

if the KA is better why do all the japanese guys use SRs?

Because it came in their car you ****ing moron.

[aleph1]

Yashio Factory actually imported a 240SX planning to build up the KA in it, but realized there was 0 aftermarket support for it so they ended up dumping it and putting in an SR (still LHD and has the 240sx rear light bar). Hence, there is no reason for the japanese to import it, one reason being that they have no support AT ALL for the KA.

[rco8786]

Yashio Factory actually imported a 240SX planning to build up the KA in it, but realized there was 0 aftermarket support for it so they ended up dumping it and putting in an SR (still LHD and has the 240sx rear light bar). Hence, there is no reason for the japanese to import it, one reason being that they have no support AT ALL for the KA.

Exactly...b/c there isn't a single JDM car that has a KA(well, a hb pickup maybe but i dunno if they made those in japan). So it should be pretty obvious why japanese guys go SR over KA.

[Kaioshin1982]

ok guys, thats the kind of answer i was looking for... I think I made the mistake of asking the wrong question, what i really wanted to know was like what WDRacing said, Why swap the ka and put in a SR? and from the answers i gotten so far, there is no good reason. Thank you guys for the replys.

[Kaioshin1982]

Oh and also... like what someone said, what if your starting off with a KA24E? just swap in a KA24DE? and would it still be cheaper? or turbo the E?

[s13conv]

Oh and also... like what someone said, what if your starting off with a KA24E? just swap in a KA24DE? and would it still be cheaper? or turbo the E?

That's about where I am right now. I have a KA24E in the car that I want to boost and a KA24DE in my parts car.

It seems like the piston oil squirters, extra cam and knock sensor would be advantageous. But by the time the DE is built and swapped....

[WDRacing]

Build the E, it will do fine. What HP numbers are you looking for?

WD

[aleph1]

I think you should slap on a simple 7psi turbo kit on the E to hold ya over, then build up the DE in the meantime, swap that in when done, reuse turbo kit (except for some parts), up boost. =)

[TachyonS14]

Maybe you could look at fuel economy if thats a factor for you? The SR from what i hear gets very good, while a boosted KA not as good. I don't know the exact mpg, maybe someone with some insight can tell.

[aleph1]

Maybe you could look at fuel economy if thats a factor for you? The SR from what i hear gets very good, while a boosted KA not as good. I don't know the exact mpg, maybe someone with some insight can tell.

I dont think high performance turbo engines have such thing as "good fuel economy." I believe the stock SR20DET gets around 20-22 real world mpg...25 is pushing it. I bet the KA24DET is within 2mpg or equal. All the air needs all that fuel. But I bet that the SR20DE (depending on generation) has a better mpg rating than the KA24DE. Also depends on the weight of your foot as well...

[s13conv]

Build the E, it will do fine. What HP numbers are you looking for?

WD

I don't really have a specific number in mind. I just want it to be faster than 75% of the stock cars on the road. I haven't driven either of the 240s (ever). The E had/has a blown auto transmission (that'll be swapped for a manual) and the parts car has a broken tie rod and bent control arm. Probably 230whp for be good in such a light car (compare to the 3300 lb GVR-4 that I'm used to).

If I used the E and later went to the DE, what other than the exh. manifold would I no longer use? I could get a top feed rail for the injectors.

[cnichols]

Yashio Factory actually imported a 240SX planning to build up the KA in it, but realized there was 0 aftermarket support for it so they ended up dumping it and putting in an SR (still LHD and has the 240sx rear light bar). Hence, there is no reason for the japanese to import it, one reason being that they have no support AT ALL for the KA.

That's not why they did it. And, he hasn't given up. That man is a PIMP fabricator...he can probably make anything he needs. He threw the SR in temporarily for some show or competition. I think he'll go back to building a KA.

[rco8786]

[edit] We need a delete button [/edit]

[aleph1]

Cnichols: Thats somewhat true, but the lack of parts "mainly a sequential transmission", is what made him put in the SR in time for TAS. They claim they have posponed the the project, but I havent heard anything about it, and the SR thats in it makes around 350-400hp, hardly worth building a whole other engine over. His original plan was to develop parts for the KA to sell to the US, as no company in japan has done anything with the KA, so he could corner the market so to speak. I dont think it will work out in the end, the cost of the parts (if they ever get around to making them) will likely be astronomical.

PS: That bumper they have on the 240SX is sweeeeet, big mouth!

[cnichols]

I've also heard that the SR and KA trannies are interchangeable with only the bellhousing needing swapped. If that is the case, an SR sequential transmission will bolt right up.

Can anyone confirm?

[aleph1]

I dunno, if Yashio Factory couldnt use it on the 240SX....I dont think it works, sequential trannys are designed differently, I dont think they mean that shifter by Ikeia (spell?) Fomula, the whole transmission is redesigned....

[rco8786]

I've also heard that the SR and KA trannies are interchangeable with only the bellhousing needing swapped. If that is the case, an SR sequential transmission will bolt right up.

Can anyone confirm?

KA, SR, and CA trannies are all identical save the bellhousing...so yes.

[Projex240]

The whole wieght saving idea is just retarded. Of course i mean with the motor. Adding 40lbs to the ka's weight over the sr is like saying that ill lose a race simply because my 105 pounds wife is in the car. Dumb......For all those who remove your interior..dumb.....to take out your trunk carpeting and floor boarddumb......to spend 1200 bucks on titanium exhaustcool.....but dumb......te remove your power steering because its drag on your street driven daily grinderdumb...and irritating...i did it...and put it back onto remove your bumper support to save 11 pounds...well you get the point...Just tell me what the advantage of an sr is?! Im a big enough man that if someone comes up with a really good performance benefit over the ka....ill even do one!

[aleph1]

All that stuff you mentioned is normal lightening procedure. Its up to the person how much they want to sacrifice for a lighter daily driver...Every little bit counts =) You add all that up and youve prolly saved 200lbs.

[vuse1]

i personally like how you can buy a KA for $300 - $600, but then again, im a 17yr old bum who doesn't have a job :rolleyes

[03frontyka24]

There's a guy who put a chevy 350 with a roots blower in a hardbody, now that is a swap worth doing.

Why swap in a SR? Sure, its easy, but if you are going to do a swap, why go with an SR when there are real performance motors out there?

[s13ofdoom]

my 2 cents are if u got an older KA u dont want to throw a turbo on and with a swap ur gonna get more reliablity trans, motor ect