SR20DET vs. KA24DET
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MainEvent212
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SR20DET vs. KA24DET
I want everyone's take on it, as well as up's and down's to it. if anyone knows prices/reasons to/not to do one or the other please tell me!SR20DET or KA24DET
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BuudWeizErr
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S14 Wannabe
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UncleBen
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i'm tired of the sr. everyone says "oh man i'm goin sr20det......" when actually most people don't do jak. i've just heard sr this and sr that, etc etc, so i'm burned out on it. the sr is a great motor and i would definately take one, but, i'd rather have a big ole turbo on my larger, torquey motor.
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S14 Wannabe
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I wouldn't mind getting a turbo for my KA but seriously... my engine wouldn't be up to the task. Already did a compression test on it and it was a no go. So I've been saving for the past 2 months.95silviase wrote:i'm tired of the sr. everyone says "oh man i'm goin sr20det......" when actually most people don't do jak. i've just heard sr this and sr that, etc etc, so i'm burned out on it. the sr is a great motor and i would definately take one, but, i'd rather have a big ole turbo on my larger, torquey motor.
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themadscientist
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lessthanjakejohn
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themadscientist wrote:CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA CA
Heeeeyyyyy:)
that wasn't a choice, lol That is what I would be going with too...
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themadscientist
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since were on the topic.....i think the ka > sr cuuuuuuzzzz... people say the ka isnt worth it cuz you have to rebuild the bottom end and put a 4k turbo system on it and only get 240ish HP tothe wheels...well the SR gets about 180 to the wheels and cost about 2600 give or take a few bucks...pluuuuusssss the misc odds and ends you need....and you still only have about 180 HP.......but yea theyre strong engines stock....but....well thats where i stop :oface
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240sxrunner
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themadscientist
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No worries. I've noticed that CA guys walk to the beat of a different drum. CA guys are born not made, we all look at that mill and all the hype about the SR falls on deaf ears. No insult to the SR guys but a lot of people want that motor because it's the one everyone wants and that is enough for them, CA guys demand more than trendy. We want a bulletproof no BS platform and the only answer is the CA. Now before all the SR guys get pissy and start the "Hyper Lemon" chant think about this;
The CA was discontinued because it was too expensive to manufacture and no other reason. The SR was cheaper to build and anybody who has seen the guts of one can tell why, not a bad design but certainly a step backwards.
The CA can make as much power than an SR and live there all day long. SRs are like BIC lighters, ask the guy I see at the Hobby Shop who melted a piston and destroyed his block. He bought a new one from Nissan OUCH! Alloy baby.
There are some wicked SRs around these days but if all the years of development had been applied to the CA instead of the cheap alternative I would expect similar figures.
No slam on the SR, it's a capable engine but pound for pound the CA is a sharper weapon capable of holding it's edge.
No slam to the KA, I've never wrenched on one but I know Nissan never intended it to do what some guys are making it do and I have respect for that.
It all comes down to personal taste.
KA=weaker bottom end(at least that is the impression I get listening to the KA guys)
SR=sloppy valvetrain and fragile block(the aftermarket has a variety of fixes to be sure though)
CA=not enough displacement(all the advantages of it are used up compensating for not enough size)
So no motor is "THE" motor, they have strengths and weaknesses and I think we can all agree that they are good motors in their own rights.
The CA was discontinued because it was too expensive to manufacture and no other reason. The SR was cheaper to build and anybody who has seen the guts of one can tell why, not a bad design but certainly a step backwards.
The CA can make as much power than an SR and live there all day long. SRs are like BIC lighters, ask the guy I see at the Hobby Shop who melted a piston and destroyed his block. He bought a new one from Nissan OUCH! Alloy baby.
There are some wicked SRs around these days but if all the years of development had been applied to the CA instead of the cheap alternative I would expect similar figures.
No slam on the SR, it's a capable engine but pound for pound the CA is a sharper weapon capable of holding it's edge.
No slam to the KA, I've never wrenched on one but I know Nissan never intended it to do what some guys are making it do and I have respect for that.
It all comes down to personal taste.
KA=weaker bottom end(at least that is the impression I get listening to the KA guys)
SR=sloppy valvetrain and fragile block(the aftermarket has a variety of fixes to be sure though)
CA=not enough displacement(all the advantages of it are used up compensating for not enough size)
So no motor is "THE" motor, they have strengths and weaknesses and I think we can all agree that they are good motors in their own rights.
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UncleBen
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S14 Wannabe wrote:I wouldn't mind getting a turbo for my KA but seriously... my engine wouldn't be up to the task. Already did a compression test on it and it was a no go. So I've been saving for the past 2 months.
thats why if you are going to turbe your motor, you save for at least a rebuild, etc. i'm doin internals and everything (i plan on it). it will be a long road, but when i'm done with it i know i will thank myself. i'll have a bulletproof KA-T
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Kaioshin1982
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the CA is definatly a tier below the SR in every respect.
1) smaller displacement2) prone to overheating3) iron block / aluminum head 4) i've looked inside both motors, I don't see how you say the SR is worse than the CA. The SR has an insanely beefed up girdle that spans the length of the crankshaft. the stronger integrated oil pan makes for a very stout bottom end. I don't see where you're getting this " The SR is fragile" bull**** from, but drifting wouldnt have gotten as huge as it has gotten with the S chassis if the sr was very fragile.
you say the sr can't make power for as long as the CA can, well , please provide documented proof of that statement. Some motors have taken more abuse than others, hence their shorter lifespans.
The SR valvetrain may be sloppy above 7800 rpm, but only because the motor does not NEED to rev past it to make power and torque! Why spin a motor higher if you don't need to ? It just raises the stress on everything exponentially.
1) smaller displacement2) prone to overheating3) iron block / aluminum head 4) i've looked inside both motors, I don't see how you say the SR is worse than the CA. The SR has an insanely beefed up girdle that spans the length of the crankshaft. the stronger integrated oil pan makes for a very stout bottom end. I don't see where you're getting this " The SR is fragile" bull**** from, but drifting wouldnt have gotten as huge as it has gotten with the S chassis if the sr was very fragile.
you say the sr can't make power for as long as the CA can, well , please provide documented proof of that statement. Some motors have taken more abuse than others, hence their shorter lifespans.
The SR valvetrain may be sloppy above 7800 rpm, but only because the motor does not NEED to rev past it to make power and torque! Why spin a motor higher if you don't need to ? It just raises the stress on everything exponentially.
b16 vtec, hands down. Them honda guys dont even have to do motor modifications they are so fast, they just hook up the body. Us nissan guys, have to build our motors and test and tune. Civics are race cars off the dealership lot. We should take a step back and mimick what honda is doing. They must be doing it right!!
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themadscientist
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A point I similarly made and one of the shortcoming i already citedmattback wrote:the CA is definatly a tier below the SR in every respect.
1) smaller displacement
Negative, they don't overheat. Actually no otor overheats unless the owner screws something up, not a valid or even true point.mattback wrote:2) prone to overheating
aannnddd? Well thanks for pointing out the stronger block on the CA but I don't see why you would when you are argueing for the SR.mattback wrote:3) iron block / aluminum head
and where do the design springs from? give you one guessmattback wrote:4) i've looked inside both motors, I don't see how you say the SR is worse than the CA. The SR has an insanely beefed up girdle that spans the length of the crankshaft.
Well it makes up for the lack of strength of the alloy block and is a good "fix"mattback wrote:stronger integrated oil pan makes for a very stout bottom end. .
the SR is strong enough to hang in there, the CA is strong enough to hang in there, I don't refute that Nissan motors aren't well built, read my post. However the CA don't blow, I see SRs blow, your point if you have one?mattback wrote:I don't see where you're getting this " The SR is fragile" bull**** from, but drifting wouldnt have gotten as huge as it has gotten with the S chassis if the sr was very fragile..
years of watching people build and run these engines as well as personal experience on my own CAs and freinds SRs, Every SR guy I know has been through a motor or two, CA guys same engine Nissan stuck in it 14 years ago, of course maintenance is a vital contributor to the longevity of a motor, that is assumedmattback wrote:you say the sr can't make power for as long as the CA can, well , please provide documented proof of that statement. Some motors have taken more abuse than others, hence their shorter lifespans...
The SR valvetrain is sloppy period when compared to the CA, the SR has those fingers that jump around and flex, it still needs an oil spray bar too. Pop the lid on a 1975 L engine and note the similarities.mattback wrote:The SR valvetrain may be sloppy above 7800 rpm, but only because the motor does not NEED to rev past it to make power and torque! Why spin a motor higher if you don't need to ? It just raises the stress on everything exponentially.
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themadscientist
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nametakennow
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themadscientist
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banwagon SR purchase? I wish I had some practical experience with a KA so I could babble on and on about that too like I'm smart or something;)hopefully a Pro-KA guy can speak up on the virtues of the "truck engine" 
Like I said before every engine has it's strengths and weaknesses closely examine all of them, watch their respective forums and see what others are doing with their engines. You might change your mind or reinforce your current position.
Like I said before every engine has it's strengths and weaknesses closely examine all of them, watch their respective forums and see what others are doing with their engines. You might change your mind or reinforce your current position.