sr20det vs. ka24det

[confi168]

i have a 92 s-13, and still confuse on whether to keep the ka or swap in the sr.

is it true i have to replace some kind of tougher pistons into my s-13 b4 fittin in a turbo?

does anyone know what are the works i must do before puttin a turbo?

[kitoro]

Nguyen, JustinC, and I are located in Canada.
nowhere close to Virginia that's for sure. We're in Calgary, Alberta.
Alberta is the province that's just above Montana i think.
Calgary's a sweet city, just wished it had a bigger scene for Nissan cars.. too many hondas on this side of North America. lah....

[kitoro]

if you're going wif the Ka-turbo mod, i heard you have to rebuild the engine to handle the turbo.
i personally like the SR, and i've been in Nguyen's SR-S14, it's fast, and fun... very limited lag too... does anyone know how big (or little) the turbo lag on a KA-turbo is?? i've been wondering about this for a while.

[SAPPER]

TESTING

[confi168]

kitoro, when you say rebuild engine... you mean change everything or only the pistons? cuz i already done the timing chain (replace new chain), new belts for all, new water pump, spark plugs, basically tune up everythin, but i didn't do anything w/ the piston tho.

you think it is possible for me to put in the turbo w/out changin the piston?

[matic 240sx]

( ka 2.4 vs sr 2.0 )
im building up my 97 240sx for a turbo... i think the ka can handle more... its a bigger engine so it can be bored out more than the sr right? bigger the engine the bigger the boost...

[Logo]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from matic 240sx on 5:13 am on July 28, 2001
( ka 2.4 vs sr 2.0 )
im building up my 97 240sx for a turbo... i think the ka can handle more... its a bigger engine so it can be bored out more than the sr right? bigger the engine the bigger the boost...</td></tr></table><span id='postcolor'>

I'm not too sure about the boring question. To find out which can be bored out more you'd need to check the bore spacing.

Personally, I like the sr more.

#1 It's lighter

#2 rev's high

#3 aluminum dissapates heat better than iron

#4 smaller cube engines respond better to boost

#5 the engine runs smoother due to the shorter stroke

#6 larger supporting aftermarket

#7 more reliable than a ka-t

...I'm sure that I could come up with more reasons for liking the sr but I'm drawing a blank at the moment. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

(Edited by Logo at 1:11 pm on July 28, 2001)

[confi168]

when you guys said bore or boring.....what do you guys mean? cuz im pretty new to car , so i know very little.



92 s-13

[Logo]

By boring, we mean boring out the cylinder so that we can fit a larger piston in the motor. &nbsp;This would increase the cubic inches of the motor. &nbsp;Some engines have so little space between cylinders that they can't be bored out much without decreasing reliability or increasing the chances that you might hit a water jacket.

[96SEChick]

From what I've heard and read, it is difficult to bore out the KA because of the thinner walls due to the fact that the block is cast iron. &nbsp;

[kitoro]

i don't know what 'rebuilding the engine' to put in the turbo means... i just know that there is a process of rebuilding SOMETHING in it. I'm guessing that it is most likely the pistons... but i have no clue for sure.

I think another reason to get the SR is that you don't have to necessarily rebuild anything... just buy it and install it. Only other mods i can think of are just putting on a new turbo, changing cams and pistons i guess. most ppl opt for the bigger turbo normally anyhoo.
and I luv the sound of the SR.. just a loud engine ripping through the air... sweet stuff.

did anyone find out what the KA's turbo lag is like? is it heavy? or do you even feel it at all?

[confi168]

that is true, the sound of KA doesn't sound that nice when compare to the SR.

actually i know a this toyota/mazda senior techinian and im plannin to have him install the SR for me in my s-13 when i get the money.

the problem is, is it legal?

I disagree with the sound of the KA, WeSTs car is probably the nicest sounding turbo car Ive ever seen. Most of that can be attributed to his external WG, but its truly beautiful. The more I think about it, for a budget and if you arent looking to be 400+hp fast, then I would say stick with the KA. I like the sr20 personally because it is exactly like my engine in almost everyway. Logo said all of the basic reasons it is a better engine to handle boost in these points....

#1 It's lighter

#2 rev's high

#3 aluminum dissapates heat better than iron

#4 smaller cube engines respond better to boost

#5 the engine runs smoother due to the shorter stroke

#6 larger supporting aftermarket

#7 more reliable than a ka-t

You may not think it is a big deal now, but when you start making your turbo come to life, high rpm hp is where it is at. Im having my engine balanced and pushing the rev limiter back to 8500, and the more you think about it, the most power your car can achieve will be in the higher rpm ranges if your turbo can flow enough air, when I shift at say 8000, my next gear starts already at 5000+ rpms, completely spooled and hauling ass. The smaller engine and shorter stroke will allow it to run boost much more effeciently and also you wont have to worry about the reliability issues. The 2.4l KA will have more torque at low rpms, but the sr should eat it alive after say 4500-5000 rpms. Lower compression, higher boost levels. The larger the bore or the larger the engine doesnt necessicarilly translate to more hp. I looked into getting a 2.4l stroker motor for my car, but found it would kill my top end, and I love the topend. So basically they are 2 different engines for 2 different purposes. If you want lots of boost and easy upgradability, go sr, if you want a turbo but want it cheaper, go with the KA.

[kitoro]

man.. i wish i had a car to fool around with to get to know all these nitty gritty things a bit more.

[West]

Go here!

<a href="http://www.zilvia.net/forums/cgi-bin/topic.cgi?forum=1&topic=13" target='_blank'>http://www.zilvia.net/forums/cgi-bin/topic.cgi?forum=1&amp;topic=13</a>

[Logo]

Boostaholic, I never really thought of thinks like that. &nbsp;A higher reving engine would definately be better for higher amounts of boost. &nbsp;High amounts of boost require large turbo's that spool slowly. &nbsp;A higher reving engine would take more advantage of a larger turbo becuase it could still make power while the turbos are fully spooled.

[kitoro]

since the SR is a high revving engine... does it require a tach that displays higher revs? or is that a stupid idea.
i mean, i've seen tachs that have like redlines at like 12000rpm and so on...

[Logo]

Getting an aftermarket tach wouldn't be a bad idea for the sr swap. &nbsp;However, the stock ka tach should work fine despite the redline being different.

See! Just trying to make you think! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=':D'> Just to say you wanted a pure drag car. Most likely unstreetable but nonetheless...you could buy a turbo that spools at 5000 rpms and shoves your nuts into the back of the seat because as soon as you shift, the turbo is still spooled. Launching isnt that big of a deal if you buy a MSD DIS2 or equivalent since it has a 2 step rev limiter meaning when you line up on the line you floor the throttle and the ignition only allows it to go as high as you have set, say 5500 rpms. As soon as you let the clutch out it engages at a perfect launch everytime and your turbo is hauling some ass, floor it up to 8500-9000 rpms, change gears, your turbo is still in its maximum effencicy range and never looses its boost. If you had an automatic car this would be even better because automatics never let off the gas and never let off any boost pressure which would help you to have better MPH in the 1/4. So if all in all you want the fastest car you can imagine, high rpms are where its at. Not to say the torquey KA cant be fast, there is just alot more room to expand on the sr20 in terms of hp than the KA. I got a little sidetracked but ooh well. Its late and Im delerious. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'>

[Grant]

Well I'm not going to be racing too much, but I would like to have a fast car later on. I was wondering if a SR20det would be a easily servicable engine in the US. I'm not that good with cars myself, and I jsut dont want the car to be too expensive to keep.

Either route you go...the KA24DET or the sr20det, both are going to be a pain to have people work on it.

[kitoro]

what do you mean exactly by 'servicable'?
oil changes are simple enuff..
but what else? tune-ups come and go... that requires a lot of work for sure... but.......... is that what 'servicable' applies to??

Say you have an oil leak or any type of pressure leak through the whole system...who can you take the car too? With either engine any Nissan dealership will laugh at you and tell you they cant work on it and if you go to a specialty shop, they will be expensive and probably have no idea what they are doing. No engine runs perfect for its whole life, and regardless of what happens, when something goes wrong, it is going to be costly.

so u expecting ur engine to get wrecked josh? cuz that would suck with ur sweet ass dsm

[confi168]

wait a minute......is the sr engine legal in the us? if it is, then how come we don see any s-15 in the US?

No, I dont expect anything to happen, but just statiung that many many engines have a habit of eventually breaking something (aka...99%). Either the KA24DET or the SR20DET are going to be difficult to find KNOWLKEDGABLE people to work on them for cheap.

[Jay Wood]

Before i can have a ka24det, i must first have a ka24de...where can i get one for a good price? Ebay and thepartstrader.com have both left me empty handed. Any other places i can look?

[matic 240sx]

my friend david, he knows everything about engines. &nbsp;he works on his eclipse all by himself. &nbsp;he has never came across a problem. &nbsp;oh yea.. he will be running 10s. &nbsp;he is putting a big ass turbo and a fogger NOS kit. &nbsp;so he is going to be hauling... he said hes not gonna stop on that car until he can put it in reverse and bunny hop! heh

[Jay Wood]

I know that I wanted to get a ka motor for my swap but due to the fact that i could not find one, i started looking around for an sr motor...guess what, i found one. Im still getting the rest of the info from the guy thats selling the engine but from what i know, all the engine needs is a wiring harness, an ignitor chip, and a mass air flow meter. With the swap needing those things to be complete, the price is 1750. Plus the guy ended up living in the very same town as me so I dont need to worry about shiping. My question to you guys...is this a good idea or is the guy asking too much? He said that he is selling it because he doesn't have enough money to finish the swap. Thanks for all help given.

[kitoro]

1750?
depends on the type of SR you're looking at.
i assume it'll be either an S13 blacktop or redtop for that pricing...
that's not too shabby.
cuz the S13 SRs run for about 2000-2500 usually..
S15s are almost $6k... so work the math there.