CA18det VS. SR20det

What does 311 kw = in HP? Cause http://web.norrisdesigns.com/Feature_Cars_view.asp?FCid=15&strcat=1&id=1&cid=0 claims 511 hp as the most powerful outside of japan. but unless you've got a FAT wallet numbers like that are impossible to come by (well without a BB V8).

Witch engine has the most bang for the buck?
Debatable...

What engine is overall better regardless of the cost?
SR20DET

What engine can have the most HP?
SR20DET, the CA18 block has been seen to crack at less HP than a SR. Having said that it's still 311kw@rw or so...

Can you Bore the CA18det? And how much?
You can bore/stroke the CA18DET to 2L

Witch engine would be best for the S12?
Best based on what? Cost, ease of install etc... can't say

Witch engine is easyer to find mods for?
SR20DET

i am sorry you think that way about the ca18det.
first of all has been know to crack means that most of over 50% of the engines over 417hp have cracked their block! Which isn't true. To crack a block you should take into consideration how the car was used previewsly. It's a real shame when one block cracks ppl just say.....OK THAT ENGINE IS SHIT. When in fact the ca holds the same as any other engine with good tuning! Period no matter you are b18, ca, sr, rb.....if your tuning is shit you will break something regardless.

boring it only to 2 litres?
well tomei sell the STROKER kit, and boring it a bit more ppl have 2.1L ca21det!

bang for the buck when you first buy it?
ca18det! period. It costs almost half less and you only off some 25odd hp!

easiest fitting.
Means, which one is the easiest engine to fit. No doubt ca18det if you keep the et tranny, if not they are the same SHIT, or if you want to keep the stock mounts!

from what i have heard sr is known to crack at around that range of power too! Sorry i just disagree with the theory that an engine has been know to crack!

ca18det
pros
true 8 lobe cam
lighter by like 15kg's iron block
timing belt
rev happy
responds good to boost
responds excellent to mods
very nice mods in japan
very tough to break
cheap since the 240 kids want sr's

cons
not enough aftermarket support in north america
size compare to the sr
doesn't like to be ghetto worked on

sr20det
pros
2.0L
a lot of aftermarket support in usa and canada
responds to boost and aftermarket support
everyshop can work on them just like the civics

con
rocker arms
costs an arm and a leg
timing chain
less revs than ca

I didn't say that engine was shit euroboy, if i did a swap again on a S12 i would consider the CA18DET again (as i have mentioned to alot of people before). Anyways you seem to have taken it all rather badly. If an engine cracks it might not have been tuned badly, it may have reached the mechanical limit of that particular block, it is a 175hp 1.8L originally after all. After having driven my car for a while i am more and more taken by the SR20DET though. The CA18DET is down a bit on power and alot on torque (torque makes you move, power makes you sound cool :P) so on the street the light tune versions of both engines are still fairly far apart in terms of performance.

Anyways he asked i answered. I have fitted both a CA18DET and a SR20DET to S12s (one my mates and one is mine) and apart from the gearbox/tailshaft the fitment is almost identical. Wiring is nearly the same etc.

Anyways enough of that comparing a 1.8L turbo motor with a 2.0L turbo motor should be a matter of economics rather than anything else. No replacement for displacement, if you need to be on a tighter budget get a CA18DET and you will be happy, if you have more cash to play with and enjoy an SR20DET. Personal preferance.
No more CA vs SR threads...

i never claimed you said the engine is shit
so have i. I have worked on b13 with sr's in there
and on nicco forums there are some guys running more than 417hp
and personally i have never seen a sr20 with sock engine just turbo ecu and incjecor upgrade to run more thn 417hp. It's just not safe
PERIOD
if you will run that much with engine and basically having an output twice as much sooner or later you will reach a break point
mechanical failure and mechanical limits? WHY?
because of good flow oil pump, true twin cam?, oil squirters?
btw just in case you didn't know the roots of a ca18det is a rb engine with 2 cylinders choped off. The ca is the research of rb! blocks look very similiar and ca is a rb chopped off with less cc.

haha yeah i think he does understand :P
the commodore over here just stopped using a 3.8L buick derived V6, thats 6 cylinders from an old buick V8, same with many a car.

but the light wieght cast aluminum block of the SR makes up in lack of strength (not really enough to notice strength wise) it gains in weight reduction.......
The SR is actaully a fair bit heavier than the CA, due to using an alu block it has to use more material and more ribbing etc to get it's strength. I've been told the difference between the two engines is 30kg although i havn't checked that myself.

The SR is actaully a fair bit heavier than the CA, due to using an alu block it has to use more material and more ribbing etc to get it's strength. I've been told the difference between the two engines is 30kg although i havn't checked that myself.

Well I am gauging this by the 4 guys on each corner of a palate with a CA on it Vs. the SR on a pallate with 4 guys......(taking it off the truck.....)

:dontknow:

I can say many things about either engine.....

I have built a Ca and I have built an SR.......

Which one was stronger? The SR.....Sorry CA guys.....
Which one lasted longer? both are still running fine after 2 years.....
Which is easier to mod? The SR unless you live in japan or can pay Tomei prices....
Which is best bang for your buck? Both...They beat the shit out of a CA18ET, VG30E, or of course the CA20E (No offense guys)....
Which would be better for you? Dont know, depends on what you want to do with your car......(personal preference.....)

Which is over all better? Neither.....Drop and RB25 in it and call it a day.... :mrgreen:

just playin......They are both equal competitors.....The cast Iron block of the CA holds up to a lot of power, but the light wieght cast aluminum block of the SR makes up in lack of strength (not really enough to notice strength wise) it gains in weight reduction.......

Its all about you......Ive had a SC61 Prescision tuning boosted CA walk away from my S13, and thats not easy.....

if you have worked on them you would have know that the sr block is actually heavier than the ca block!
The engines are sr 28kg heavier than ca

if you have worked on them you would have know that the sr block is actually heavier than the ca block!
The engines are sr 28kg heavier than ca

I think I just explained my opinion on the block weight.......As for building Nissan's, come back to me when you have your Nissan Scope tech certification.....I admitted that it was just from the feel and you try to slam me? You must be one of those CA Nazi's that has a size complex.....I just got done saying that I had a CA hand my Built S13's ass to me....LOL...Sorry my opinion offended you.....

-Jeff

I think I just explained my opinion on the block weight.......As for building Nissan's, come back to me when you have your Nissan Scope tech certification.....I admitted that it was just from the feel and you try to slam me? You must be one of those CA Nazi's that has a size complex.....I just got done saying that I had a CA hand my Built S13's ass to me....LOL...Sorry my opinion offended you.....

-Jeff

i am sorry you have to get offended and show what you have in terms of certification wise. But it's not impressing anyone. Actuallly for a tech you should have known not to make the assumption of just guessing by feel. If you are a tech you leave everything to comps/science/paper pen and calculator.
I didn't try to slam as i haven't tried to slam anyone here. I was just stating a point which is widely spread on the net and has been repeated here at least 3 or 4 times. No i would have preferred the fj before the ca but the deal went south. BTW i am really sorry my fact offended you about the sr being heavier. I am not here to start an argument, opinions are opinions and unless i hear someone who designed BOTH these engines then they are just that. OPINIONS!

i am sorry you have to get offended and show what you have in terms of certification wise. But it's not impressing anyone. Actuallly for a tech you should have known not to make the assumption of just guessing by feel. If you are a tech you leave everything to comps/science/paper pen and calculator.
I didn't try to slam as i haven't tried to slam anyone here. I was just stating a point which is widely spread on the net and has been repeated here at least 3 or 4 times. No i would have preferred the fj before the ca but the deal went south. BTW i am really sorry my fact offended you about the sr being heavier. I am not here to start an argument, opinions are opinions and unless i hear someone who designed BOTH these engines then they are just that. OPINIONS!

As is why I posted what I posted......

I am not here to start an argument,

Sure act like you're here to start an argument... :roll:

How long is this crap gonna go on????? :slap: :guns:

:cheers:

Sure act like you're here to start an argument... :roll:

How long is this crap gonna go on????? :slap: :guns:

:cheers:

no i only ment "keep certificates on the wall and facts in here"

sorry that you think that joel but i have been here for some time and never have i attempted to start an argument. I just don't appriciate ppl who think they know better JUST because they have some sort of certification.

Matt here knows a ton and i don't think he ever got any certification from nissan or anything in between, and so with a lot of other member who have helped me and others here, who i really am gratefull for.

but if you pick an SR u have to put up with that droning farting exhaust note
Yeah it's true, i think they sound kind of like a light truck haha
Basically what i heard of the SR replacing the CA was that they worked out what they did and didn't need from an engine to perform to nissans factory requirements and they used the CA to work that out. The SR only had what it needed to make nissans cut and therefore save nissan money while still delivering to the public (who i have heard weren't overly impressed that the S13 Ks was initially quite down on power compared to the S12 RSX turbo). As with all factory bits it's down to economics.
Good post S12PSI.

Yeah it's true, i think they sound kind of like a light truck haha
Basically what i heard of the SR replacing the CA was that they worked out what they did and didn't need from an engine to perform to nissans factory requirements and they used the CA to work that out. The SR only had what it needed to make nissans cut and therefore save nissan money while still delivering to the public (who i have heard weren't overly impressed that the S13 Ks was initially quite down on power compared to the S12 RSX turbo). As with all factory bits it's down to economics.
Good post S12PSI.

actually ca was dropped because it was too expensive to maintain and the ca platform was a research program where nissan threw TONS of money, and since going close to bankrupcy they had to ditch a lot of programs....but the ca is a true power house

now the fj is just another category....so no need to talk about that!

:lol:

Nice rant man... :werd:

Now can't we all just get along and help each other?!

My vote is with everyone else here that said to quit comparing apples and oranges...

:cheers: :cheers:

man if i was going to build another S12, i would build one with a suzuki G10A 1.0L 3 cylinder carbie engine, thats an animal, 60HP they quote from factory..............WHAD A BEAST!

QUOTE: (S12PSI).....P.S. just read the first page again, whats this about SR's rocker arms being perfectly fine SHeppo? i don't care what design they use, they a reknowned for cam follower breakage, and to rev an SR regularly you need to fit Rocker Arm Stoppers. One higher profile case in WA would be ROY's S13 (aftermarket flared front guards) from C-red performance, after blowing up 3 motors, he finally fitted aftermarket valve train gear. the ONLY SR to to have a different setup and not run into problem is the GTiR motor. Thankyou

man i didnt mention anything to do with the SR rocker arms...........not nothin, read the post more carfully!

And rocker arm stoppers are not a garauntee as well...I have broke many RAS's over 7800......

lol.... dont take ANYTHING i say serious! :lol:

did anyone say SR rocker setup is used on many motorbikes that rev to 13000 rpm? Oh wait..... Engineers are stupid.... :slap:

Also GTiRs too have high rev probs.

D1 Best car. S15 with a high power CA18DET.. HA! Never gonna happen.

D1 Best car. S15 with a high power S13 SR20DET.. 3 cars i know off are doing this atm!

But hey what do JAPS know about their own cars.... :lol:

/Smart 455 mode off

first off no one is calling you stupid for actually having a ca engine. So keep those comments with ppl that can accept that kinda language. If you don't like the s12, then go join the s15 club or you too borke to buy one? Don't be a hypocrit!
second s15 with an sr20det? I think that they are factory cars with factory engines.
The sr20 has been in production longer and was avaiable for more years than the ca18det. The aftermarket is there. BUT THEN AGAIN you think since there is aftermarket the motor is great. Those god damn dx series engine. They got everything for them. Screw it i will ditch everything because if there are enough stupid kids to want one a manifacture like hks apexi will most likely produce one part or a lot of them. You are being like the kid who belives everything he sees at the movies. Rocker arms no matter how much you protect it was used to save money on research and it's a primitive way.
Well i am really to disappoint you but i just shillacked a sr20det powered s13 last night. OPPPPPSSSSS the ca beat an sr......either god threw an lighting to make me fast or something

his mods
intake costum intake mani
3 inch exhaust
bluebrid sr with t28
chipped tuned
ic and costum piping
up the boost
bov

me
ca18det
ic
boost
bov

by 1.5 cars.................god damn !!!!!!!!!!!!!!!!!!!!!!!!!! i think all ca18's should burn in hell now because they dared to beat the god of all engines....

I love how PPL think that because I and many other's like tuning SR's, that we have a god complex over any other engine......FuC an SR give me an RB anyday.....

I just like my SR because I live in the states......I can get SR parts (replacement parts) easier......We got a version (FWD) of the SR and it has many interchangeable parts such as the waterpump (notoriously going bad on an S13 redtop/blacktop) Yeah I love my SR's, Doesnt mean I think anyone else is inferior (sp?) And Just to clear the record.....Once again I will say that my S13 (SR powered and NOT stock) got wasted by a bad ass CA.....LOL Shit if you want to hear a real bad story, I got beat by a Geo storm with a turbo 3 Cylinder suzuki engine....Its all about the way you build it not the fact that one is better than the other......LOL if one engine was better than the other tell me why I had a set of iskiderian cams and a set of pace setter headers and a catback exhaust on my SEv6 ( a long time ago...) and i walked the dog on a Turbo Z31??????

I think your taking this shit personal Euroboy.....Its not......Its a message board.....I guess next you'll be threatening to kick each and everyone of our arses......HAHAHA!

nah i am not violent man!
all i did was compare 2 engine to the best of my knowledge and ppl where telling me their certificates. I mean that's good if they have them. BUt don't show certificates just to shut someone. This is a topic, no need to stirr up shit.....we can do that at lounge and have some fun!

so would you drink 1.8L of beer at the pub?
or 2L?
That is the question?
Well thats if you go NA, you could get alot more beer into an engineer using forced induction ;)

yeah man, forced induction drinkin is the way, i built a killer beer bong, HUGE funnel feeding a T28BB turbo, blowing into a custom mandral bent plastic hose then into the mouth of the drinker..........she pulls 2BAR beer pressure, runs a surge keg to make sure the funnel is never empty, and makes 600hoseHP..........................:-)
does it have a BOV to spray all bystanders with beer? :p

CA18det vs. SR20det
                          ~~~~~~~~~~~~~~~~~~
         
Witch engine has the most bang for the buck?

What engine is overall better regardless of the cost?

What engine can have the most HP?

Can you Bore the CA18det? And how much?

Witch engine would be best for the S12?

Witch engine is easyer to find mods for?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Sorry for all the questions lol i just really wanna know.... friend of mine has a s12 and im just wondering on what this car is capable of with a swap, it has a ca20 in it right now and its just not got any umpff in it anymore....

which which is witch? lol
bang for buck CA18det hands down
CA18det is easier to put in an s12 from what i hear on this board as well

ps i am a CA18DET convert

1.  CA18DET definetly
2.  Depends on who you talk to, but probably overall the SR20.
3.  Probably the SR20, but again, depends on who you talk to.
4.  Don\'t know
5.  CA18DET definetly.  Easy swap, bolts right in, just wire it up, run the intake plumbing, and you\'re ready to go!
6.  Probably the SR20, but it\'s the hot motor right now, and the CA is definetly still a good motor, and MOST definetly the best bang for the buck.  You can get a CA clip for about half of what you get a SR20 clip for.  HP stock is not much different, so use the money you saved to throw a few bolt ons, and you\'ve got one heck of a powerplant!

Plus it\'s a lot easier swap than the SR20!

Witch engine has the most bang for the buck?
Debatable...

What engine is overall better regardless of the cost?
SR20DET

What engine can have the most HP?
SR20DET, the CA18 block has been seen to crack at less HP than a SR.  Having said that it\'s still 311kw@rw or so...

Can you Bore the CA18det? And how much?
You can bore/stroke the CA18DET to 2L

Witch engine would be best for the S12?
Best based on what?  Cost, ease of install etc... can\'t say

Witch engine is easyer to find mods for?
SR20DET

What does 311 kw = in HP?  Cause [url]http://web.norrisdesigns.com/Feature_Cars_view.asp?FCid=15&strcat=1&id=1&cid=0[/a] claims 511 hp as the most powerful outside of japan.  but unless you\'ve got a FAT wallet numbers like that are impossible to come by (well without a BB V8).

It\'s about 417hp.  It was from a bored/stroked 2L CA18DET that was built in japan and brought to oz a few years ago now.  The block cracked after about 6 months though, i have heard a few stories of the CA18 block giving up after a while at those sorts of power outputs.  Still pretty fat though :)

Cryogenic treating of the block would make it last longer at higher output. Here is an article by sport compact car where they cryo treated a VG30DETT block [url]http://www.sportcompactcarweb.com/projectcars/9909scc_proj300zx/[/a]
They said that \"cryo treating can increase wear resistance by over 800 percent, fatigue strength by over 100 percent and tensile strength by up to 25 percent. The typical increase of wear resistance in cast iron like our block is 100 percent.\"

Witch engine has the most bang for the buck?
Debatable...

What engine is overall better regardless of the cost?
SR20DET

What engine can have the most HP?
SR20DET, the CA18 block has been seen to crack at less HP than a SR.  Having said that it\'s still 311kw@rw or so...

Can you Bore the CA18det? And how much?
You can bore/stroke the CA18DET to 2L

Witch engine would be best for the S12?
Best based on what?  Cost, ease of install etc... can\'t say

Witch engine is easyer to find mods for?
SR20DET

Why is there another thread on this? I thought this issue was settled a long time ago in the many threads that this has come up in or been the topic of.

Here\'s how it goes. If you want it cheap go CA if you want power go SR. If you want adventure go KA.

Just becuase an engine revs better doesn\'t make it better. I thought the SR\'s revved almost as well as a CA anyway. Oh well... I am not getting into this further

CA = Good drop in motor, makes good power with mods.

SR = Simple drop in with minimal fabricating. Makes MORE power per mod than CA. SR also has more torque and can spool bigger turbos faster.

Nothing wrong with the SR setup. The setup used on the SR rockerarms is used on many motorbikes that rev too 12000+.

Funny you put this under the CA when the SR IS better then the CA at all these things  :asshole:

responds good to boost
responds excellent to mods
very nice mods in japan

I didn\'t say that engine was shit euroboy, if i did a swap again on a S12 i would consider the CA18DET again (as i have mentioned to alot of people before).  Anyways you seem to have taken it all rather badly.  If an engine cracks it might not have been tuned badly, it may have reached the mechanical limit of that particular block, it is a 175hp 1.8L originally after all.  After having driven my car for a while i am more and more taken by the SR20DET though.  The CA18DET is down a bit on power and alot on torque (torque makes you move, power makes you sound cool :P) so on the street the light tune versions of both engines are still fairly far apart in terms of performance.

Anyways he asked i answered.  I have fitted both a CA18DET and a SR20DET to S12s (one my mates and one is mine) and apart from the gearbox/tailshaft the fitment is almost identical.  Wiring is nearly the same etc.

Anyways enough of that comparing a 1.8L turbo motor with a 2.0L turbo motor should be a matter of economics rather than anything else.  No replacement for displacement, if you need to be on a tighter budget get a CA18DET and you will be happy, if you have more cash to play with and enjoy an SR20DET.  Personal preferance.
No more CA vs SR threads...

here\'s an idea..............

DONT COMPARE 2 TOTALLY DIFFERENT ENGINES!

thats where i stand (with mechanical engineering qualifications)

dont think they are different, read here, this is written by one of Australia\'s most popular jap importers...

CA18DET review:
[url]http://members.iinet.net/~sayers/biscuits/ca18.htm[/a]

SR20DET review:
[url]http://members.iinet.net/~sayers/biscuits/sr20.htm[/a]

Also the reason there\'s a lack of aftermarket support for the CA18DET is because if wasnt offerend to the public for too long, as the SR has been in business from 1990 to the new S15\'s!!! so there\'s SR\'s out there!

I aint goint to say whats better as i dont care, they each have pros, cons and different charactoristics.

to all the keyboard warriors: \"NO MORE CA18DET v\'s SR20DET POLLS\"

its like comparing apples with bananas!

I concur with Nebuchernezzer
I reckon next time someone brings it up they should be told to read the old threads

Oh yeah i just went and looked at the link for the 511hp 180sx.  It has a fat build up but last i checked the TD06-25G wasn\'t that big a turbo, in fact as i recall it\'s more at the response end.  Prolly slightly big on the CA18DET but still not a monster.  The 311kw CA18DET in oz had a drag setup, T88-33D i think it was, definitely a highmount lag inducing snail :)
Anyways just my last word, this thread should go quietly into the night now.

I didn\'t say that engine was shit euroboy, if i did a swap again on a S12 i would consider the CA18DET again (as i have mentioned to alot of people before).  Anyways you seem to have taken it all rather badly.  If an engine cracks it might not have been tuned badly, it may have reached the mechanical limit of that particular block, it is a 175hp 1.8L originally after all.  After having driven my car for a while i am more and more taken by the SR20DET though.  The CA18DET is down a bit on power and alot on torque (torque makes you move, power makes you sound cool :P) so on the street the light tune versions of both engines are still fairly far apart in terms of performance.

Anyways he asked i answered.  I have fitted both a CA18DET and a SR20DET to S12s (one my mates and one is mine) and apart from the gearbox/tailshaft the fitment is almost identical.  Wiring is nearly the same etc.

Anyways enough of that comparing a 1.8L turbo motor with a 2.0L turbo motor should be a matter of economics rather than anything else.  No replacement for displacement, if you need to be on a tighter budget get a CA18DET and you will be happy, if you have more cash to play with and enjoy an SR20DET.  Personal preferance.
No more CA vs SR threads...

So..besides the ECU, Harness, and MOTOR itself, what is needed to do this swap?(SR20DET) Rough estimates are nice..

The gearbox, the CA box would probably fit if you used a SR bellhousing on it (i\'m looking into this for a SR powered corolla i have) but using the SR box would probably be best.

btw just in case you didn\'t know the roots of a ca18det is a rb engine with 2 cylinders choped off. The ca is the research of rb! blocks look very similiar and ca is a rb chopped off with less cc.

RB with 2 cylinders chopped off........................................i dunno bout that, it would idle badly, be outta ballance and have a really rough edge from where the chainsaw went through the motor, be hard to mount a bellhousing! HAHAHAHAHAHAHAHAHAHAHAHAHA  man us engineers have a sick sence of humour!

you do understand what i ment by that now don\'t you?!

Sounds like a Chrysler motor ... the 3.9 V6 is actually a 5.2 V8 with the back 2 cylinders chopped off. All to save $$ on parts.

I still find it a bit surprising that an iron block would come apart before an alloy one.

But I also agree ... don\'t compare motors.

The power # a motor can make is a finite number based on CFM it can flow.

That is a theoretical number.

It\'s up to the engine builder to find a way to make the motor need all that CFM.

Ignore dyno sheets. Dynos are so easy to trick, and the power #s you can build in a no load scenario can easily shatter a motor under load.

1/4 mile ... great litmus, you need big power and big skills to get good #s.

If your SR20 makes 417 hp without coming apart ... great. If your 417hp SR runs 14.5 in the 1/4 and gets eaten by a 300hp ca18det ... does that mean it\'s a better motor and everyone on all Nissan forums should build a ca18det and throw away the SR?

No.

No one can tell you anything other than an average of where a stock motor will come apart. A good rule of thumb is 2X advertised output.

Laws of engineering.

So that puts the ca18det at 350hp

the SR at 407-430

ca20e - 204

ca18et - 270

B16A - 40 :finger:

But those are STOCK numbers.

Why blow up a stock motor to find out?

You can\'t expect any motor to live for periods of big power for very long without building it to take it.

And those power numbers are where \"breakage\" of hard internal parts are likely to start.

Wear and tear failures start much sooner.

haha yeah i think he does understand :P
the commodore over here just stopped using a 3.8L buick derived V6, thats 6 cylinders from an old buick V8, same with many a car.

I can say many things about either engine.....

I have built a Ca and I have built an SR.......

Which one was stronger? The SR.....Sorry CA guys.....
Which one lasted longer? both are still running fine after 2 years.....
Which is easier to mod? The SR unless you live in japan or can pay Tomei prices....
Which is best bang for your buck? Both...They beat the shit out of a CA18ET, VG30E, or of course the CA20E (No offense guys)....
Which would be better for you? Dont know, depends on what you want to do with your car......(personal preference.....)

Which is over all better? Neither.....Drop and RB25 in it and call it a day.... :mrgreen:

just playin......They are both equal competitors.....The cast Iron block of the CA holds up to a lot of power, but the light wieght cast aluminum block of the SR makes up in lack of strength (not really enough to notice strength wise) it gains in weight reduction.......

Its all about you......Ive had a SC61 Prescision tuning boosted CA walk away from my S13, and thats not easy.....

but the light wieght cast aluminum block of the SR makes up in lack of strength (not really enough to notice strength wise) it gains in weight reduction.......

The SR is actaully a fair bit heavier than the CA, due to using an alu block it has to use more material and more ribbing etc to get it\'s strength.  I\'ve been told the difference between the two engines is 30kg although i havn\'t checked that myself.

I can say many things about either engine.....

I have built a Ca and I have built an SR.......

Which one was stronger? The SR.....Sorry CA guys.....
Which one lasted longer? both are still running fine after 2 years.....
Which is easier to mod? The SR unless you live in japan or can pay Tomei prices....
Which is best bang for your buck? Both...They beat the shit out of a CA18ET, VG30E, or of course the CA20E (No offense guys)....
Which would be better for you? Dont know, depends on what you want to do with your car......(personal preference.....)

Which is over all better? Neither.....Drop and RB25 in it and call it a day.... :mrgreen:  

just playin......They are both equal competitors.....The cast Iron block of the CA holds up to a lot of power, but the light wieght cast aluminum block of the SR makes up in lack of strength (not really enough to notice strength wise) it gains in weight reduction.......

Its all about you......Ive had a SC61 Prescision tuning boosted CA walk away from my S13, and thats not easy.....

Well there you go someone told me right it seems.

if you have worked on them you would have know that the sr block is actually heavier than the ca block!
The engines are sr 28kg heavier than ca

comone boys and girls no need for this it all comes down to preference and how much $$ you have.. remember we are here as a community to make these cars kick ass,, not to bitch about which or what it better.. we dont want to become a dsm or supra forum.. we are a family here.. or at least thats how i feel being here..

are we still comparing to totally different engines? hey lets compare a 3 cylinder to a W16, or a pushrod V8 to a DOHC one?? Man both engines have pro\'s and con\'s, and as i see it, you choose an engine you can afford, or which is easiest to install or what you can get parts for..............but if you can afford to dump a RB26DETT into ya S12, then do it, it will woop both SR and CA in power, torque and outright street cred!