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Chat General Discussion About The Nissan 240SX and Nissan Z Cars |
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#1 |
Post Whore!
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Ok i understand the cheapness of the ca powerplant, etc. But you may want to consider a different powertrain seeing as there is little aftermarket support, and oem parts availible comparitive to sr20 parts, or even rb parts.
Also That is a very old motor. Just thought i would put a thought into it for you. |
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#2 | |
BANNED
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Hey Spenc, this is Brandon. I can help you with the motor swap, but it won't get done in a day ![]() |
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#3 | |
Nissanaholic!
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***quote) from midwest240sx.com "The Technical @#%$: The CA used an iron block unlike the SR which runs an aluminum block but despite that there is not much of an overall weight difference in the two motors. The CA LIKE THE SR has the piston oil squirters and crank stud girdle. The SR uses a 4 runner manifold into a 4 port head, the CA on the other hand runs a 4 runner manifold that splits into 8 entering the head as an 8 runner manifold. The big difference in the two motors is in the valvetrains. The SR20 only has 4 cam lobes per cam not 8 like the CA does. With 8 valves per side on the SR Nissan had to use a rocker arm arrangement to actuate paired valves simultaneously from a single lobe. It's cheaper to implement than the CA's setup but causes valvetrain loss and noise. The CA runs true 8 lobe cams which act directly on top of the valves. Much more effecient, less moving parts, better revs, etc.. That's one of the reasons that the CA is considered to be a more FREE REVVING engine than the SR. The biggest advantage the SR20 has is it is a bigger capacity motor. 2.0L in comparison to the CA's 1.8 ( no replacement for dispacement right?) . The SR20 has a relatively long stroke, it's stroke is longer than the width of it's bore. The stroke to rod length ratio is at a point where the engine still revs well, but it suffers from "excess stroke". This is another reason the the ca is considered to be better reving (smoother not higher), unlike the SR with it's "over-square" design the CA uses a square design (stroke=bore). The SR is capable of handling more power on the stock bottom end. I've heard of 400-450PS being possible with the correct tuning on a stock SR bottom end while 400PS isn't quite feasble with an CA18DET... A big reason again being the difference in displacement. (quote) from midwest240sx.com***** |
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#4 | |
Zilvia Member
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post from other board is erroneous btw... i.e. sr20 is square motor, not over-square... and how many people have personally had revving problems with sr20 besides what they read about on the internet? it does happen, but not as often the internet tells you, esp if you're not a negligent driver. aw shit whoops, this is zilvia.... um.... ok don't get sr20s pls. |
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#5 | |
Post Whore!
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BTW i have blown up many sr motors and I believe they suck as well. Thats why im going to a ls1. |
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#6 | |
Zilvia Junkie
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*GorgeousGarage* L.oose S.ocks D.aisuke ! |
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#7 | |
Yes, I look like that
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#8 |
Zilvia Junkie
![]() Join Date: Jan 2004
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http://www.paddy.co.jp
f'it i got a magazine [?'king of used parts'?] that has garage paddy's ca18det s14 on the cover. its yellow and silver if i find pics that work... |
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#9 | |
Yes, I look like that
![]() Join Date: Mar 2002
Location: In my supervillain's lair
Posts: 27,980
Trader Rating: (19)
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Underconstruction ‚½‚¾‚¢‚ÜA‚±‚̃y[ƒW‚Í€”õ’*‚Å‚·B ‚*‚¤‚µ‚΂ç‚*‚¨‘Ò‚¿‚* ¾‚³‚¢B ... and I don't understand that gibberish at the bottom |
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#10 | |
Zilvia Junkie
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![]() Constant High revs will bring down the LS1 or any motor for that matter. From what I have seen the piston rings do a number on the walls and the stock oil pan needs to go if you plan on a high g/machine. Do you ever wonder why LS7 went dry sump?
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#11 | |
Post Whore!
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Motors blow up because. Dumb noobs dont know what they are doing. Installation incorrect. Part failures due to unseen things. beating the hell out of them and using them for what they are meant to do. (me) |
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#12 | |
Zilvia Junkie
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*GorgeousGarage* L.oose S.ocks D.aisuke ! |
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