I dont know much about the KA but it seems to me anyways that the SR20 would be better for boost and so on since it is built for boost in the first place. I mean its probably a better option to swap in a SR20 then turboing a KA in a 240sx. But like i said these motors arent my fortay. And how much does a SR20 swap go for these days?
SR20… don’t pass go, don’t collect 200 just call Hybridynamics… 7249252660
x 2
:whitey:
They’re both good?
The KA isin’t so bad to start with if you want to pick and choose your parts. From what I understand the block is good for a lot more horsepower than the relatively weak factory non-turbo pistons and rods - it’s basically a turbo motor that never got the turbo. Once you swapped to forged turbo pistons/rods, it’s got all the good turbo stuff built in, big bearing journals, oil squirters, etc. I know there is a bunch of Nissan parts bin engineering that can be applied to make it work, and JWT even makes a reprogrammed ECU to make the KA work with boost.
That said, swapping the SR in is good enough for most people.
sr20det > ka24de
There is a reason why Nissan put sr20det’s in silvias, 180sxs, bluebirds, and GTI-R’s.
And put ka24de’s in pathfinders, and hardbody pick-up trucks. :hsugh:
:hsugh:
what does an SR20 swap run with everything 5k more less?
I went to http://www.ka-t.org/ and it looked to me most of them are running mid 12s average at around 15-20psi
1320 what do you have done to your car, stock SR20? with t3/t4 running what kind of boost (i know you just got that GT30R)
I mean look at this guy http://ka-t.org/rick/ hes running about the same times as 1320, but what i dont know is how his and 1320’s mods compare (sorry to single you out 1320, but your probably the best person to ask about this)
that dudes motor is pretty damn build 1320’s was done on a stock motor i belive
There is? What is it?
haha
They are not designed for boost. Why even ask. :doh:
mike knows more about engines in his big toe than most of you put together (hint: he writes books)
I want to ask, because there’s gotta be more information than “The KA wasn’t designed for boost.” Something that makes the engine a bad choice for turbocharging “the main bearing bolts like to seperate from the block” like a hyundai V6, or “the open deck design tends to distort at higher power levels” like a honda. That’s the kind of answer that i’m looking for here.
I will be shocked if anyone gives you that…
that’s cuz no one knows they claim “it’s the cool thing to do”
Me too. They’re both good engines.
An Sr20det swap can easily be had for under $5000. But i recommend that when you do the swap you also upgrade the stock clutch while you have everything apart. Basically a redtop sr20det swap is going to run you about $2200. A manual boost controller $50. I would highly advise a clutch, $350. And i would also advise an FMIC $200-500. An exhaust would also be a decent item to purchase, but its not nessesary. You could just run an open downpipe at the track or to street race.
Ive had 2 sr20det swapped 240sx’s.
My black one i currently have went 11.91 @118.xx on a t3/t4, 555cc injectors, pump gas, and ET streets and the supporting mods i.e clutch, exhaust, power FC. This was done on a stock bottom end and stock head/valvetrain.
I had a green 240sx coupe also that went 13.10 @110 mph with the stock t-25, only had a 3" turbo back, a FMIC, K&N, manual boost controller and clutch.
There’s no little quirk to the ka24 as far as what you mentioned, other than they like to blow headgaskets like champs (mine blew in my s13, which is why i bought the sr20 swap) and of course the super weak internals.
My main reasoning for going sr20 over ka24 was-
a) Sr20det even with turbo on it, is lighter than ka24
b) i like the higher revving sr20
c) Parts availability/aftermarket for sr20det is light years beyond ka24’s
d) Amount on power you can make on a stock sr20det bottom end, the ka24 is lucky to hold 300 rwhp for very long.
Im not saying that the ka24 is all that bad… but pretty much it only has large displacement and an iron block going for it.
All good points, thanks!
As 1320 listed, yes, the headgasket issue is always a big deal on those motors. i’ve also seen tons of spun bearing on KA24’s. the sr has been proven to hold almost 550hp on the stock bottom end. thats something i’ve never seen done with a KA24. when you compare turboing a KA, to doing an SR swap, you’re probably going to spend around the same. i just feel that the SR has proven to me to hold together much better than the KA. plus you’ll have the hassle of getting the computer tuned for boost, etc., that i feel the sr swap is just easier to do.
ohh, and if anyone’s interested, i got a nice 240 with an sr20 swap for sale, with tons of upgrades.
Well I’m a neon guy, that probably influences my opinion on the KA, since i’m used to having a block that is a piston/rod swap away from holding 550hp too. but yes, having a factory turbo motor means you don’t have to play with the internals much.
And another thing, what does one do with the SR if you wanted to keep things like air conditioning, cruise control, etc?