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#1
09-19-2003, 12:55 PM
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What should I do?
With my 240sx?
Mainly should I keep the KA24 and get the twin cam head *is this even possable?* and turbo it, OR should I do the SR20DET swap and tweek the motor. Eather way I want the engine I get rebuilt with forged internals, and balanced so I can turn some serously high RPM. The SR swap I can have done for 3,200...all the parts and labor included *by a shop I found in LA* The cheepest I have seen a turbo setup for my KA is 3,000 and then you need labor. So people, what should I do and why?
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 My new RHD project! Solid Crew (Circa 2002) 
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#2
09-19-2003, 01:44 PM
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do the SR just for the sake of the reliability of the stock turbo charged engine. don't turbo an NA engine. besides i think you can get more power out of an SR for cheaper. i may be wrong. if not the SR than the CA for cheaper hp. i'm hoping that my ka24de will be gone after winter. (i will sell it to who ever wants it too).
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#3
09-19-2003, 02:44 PM
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I'm sorry if I'm not a fan of the KA and this is a biased opinion, but if you want a decent amount of power a CA or SR powerplant is a really good idea. I'm leaning more towards CA because of some reliability issues at higher power with the SR's rocker arms and the aluminum engine block which I'm not as fond of. Plus CA can be a lot cheaper...even quite a bit cheaper than the redtop SR.
Either way you go...SR and CA are badass for mid hp needs (250-400hp)
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#4
09-19-2003, 03:01 PM
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BUT
he is talking about completely rebuilding the engine anyway... so if he does turbo charge the KA he can fill the block with lower compression forged pistons and he would in essence have a "turbo" engine. I'd go KA... think about it this way.. you already start with 20% more displacement.. JUst don't get too caught up in building the engine for R's think more in terms of usable power band.. Try to obtain as much usable flat torqued power-band as possible...
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#5
09-19-2003, 03:05 PM
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id go with the sr swap, why? cause thats the motor it was suppose to come with, its lighter than a turboed ka, so the cars better balanced. the sr was designed to be a turbocharged and the ka wasnt, so im thinking that the sr is the better design? the ka will produce more torque and power overall, but the sr isnt that far behind, so id still go with the sr.
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#6
09-19-2003, 03:08 PM
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Re: What should I do?
Quote:
If you really want to piss around with a full blown engine swap make it worth while with something in the RB or VQ line.. BTW not flaming here... just fuming at ignorance....
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#7
09-19-2003, 03:38 PM
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Quote:
girls dont know anything about cars. i was being sarcastic.... by the way, i was still editing my post  .
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#8
09-19-2003, 03:51 PM
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RB25 is 40% larger than the CA...does that mean the engine is crap? Displacement isn't king.
Go with whatever you want TerminalVelocity...CA, SR, RB25 or KA-T are all great choices...check out each and decide which one you like most for looks, potential, and cost. They are all different and will all have different power characteristics; both stock and modified.
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#9
09-19-2003, 03:56 PM
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Re: What should I do?
Quote:
The only replacement for displacement is technology + experience... and technology is far more costly than displacement... although the CA is also a good powerplant to start from.
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#10
09-19-2003, 04:03 PM
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i like the sr swap idea in terms of reliability... it was designed as a turbo. on the other hand, look at tat's car. he put down 240hp AT THE WHEELS.... the sr puts about 189hp at the wheels. i think he spent 2 grand on the whole setup.
depends what you want to do..... the ka is a very durable engine, they have been known to get very high mileage (300k+), so that might not be a bad idea. just don't try to boost too much or the bottom end won't be able to sustain it. you can get an sr tuned for 12's though.. there was a stock sr on ebay, ran a 12.9 at 100-odd something mph. all stock... just exhaust. if you know someone who can tune it that person is worth his/her weight in gold.
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438whp / 373tq - 11.9 @ 126 
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#11
09-19-2003, 04:47 PM
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You can get 200whp from under 1grand.
The KA-T, if you do it right, can be the king of 240SX engines, on a dollar per hp basis. Ask SR20DETPower. Also if you MUST be JDM dont even bother with SR...Do a CA swap
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Derek:word..im debating //Penner\\ : i'm a master debater Derek:well youve had a few more years experience than i Derek: Haha AF Sig Material
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#12
09-19-2003, 06:48 PM
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Re: Re: What should I do?
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#13
09-19-2003, 07:56 PM
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ok ok where to begin......
1.)"Mainly should I keep the KA24 and get the twin cam head *is this even possable?*" NO 2.)"the sr was designed to be a turbocharged and the ka wasnt" Actually, the KA handles boost well, makes more power then the SR psi for psi... and it has oil squirting pistons, a good thing on a turbo engine, btw only the DOHC has those pistons, although the SOHC isn't a bad engine to turbo either, stock it has higher comp pistons then the DOHC, this means u can run less boost before detonation, but you will still make same power or more with tuning because in essense those pistons are like a 20hp increase over the next ratio lower DOHC pistons...... 3.)"CA, SR, RB25 or KA-T are all great choices...check out each and decide which one you like most for looks," stupidest thing I heard all day, what if the ugliest engine in the world was the best? would u buy it.... probably not from that statement lol. 4.)"there was a stock sr on ebay, ran a 12.9 at 100-odd something mph. all stock... just exhaust" I doubt that... like I was telling you about your car mynismo.. that car probably has some drivetrain mods so it accomodates the power better... 5.)"Ask SR20DETPower" yep you could get over 200rwhp for UNDER a grand if one was so inclined. I have seen someone else run 5psi of boost and get 220rwhp, the kicker is this was all on a stock MAF, stock KA injectors.... so thats even less money spent. Basically if you wanted to do it REALLY cheap, get a internal waistegate mani from REALNISSAN for 330 bucks, find yourself a used T3 turbo for under 300 bucks, this won't be a hard feat if you look around...., then you need a manual boost controller, this can be accomplished for 10 bucks lol. A stock nissan turbo already has the actuator, so by going internal waistegate you are saving yourself a good 300 bucks, 100 on the manifold, and about 220 for a TIAL wastegate. You need oil lines and flanges, this is about 50-60 bucks if you can weld yourself. Then you need some way to get the charged air to the throttle body, aka turbo plumbing, since were on a budget, Im sure this could be, excuse my french, nig rigged for under 50 bucks. 50+60+300+330+10= 740usd plus shipping hehe.... although setup properly, this would work fine at say 5psi, this is a budget system though. And if its tuned right and thats all you wanted you could run it like that for probably yearS......
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#14
09-20-2003, 12:20 AM
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Re: What should I do?
Quote:
Quote:
Even the sound of the engine affects whether or not people may want to buy it. Hell that's a lot of the reason I want an RB25 over a CA...it's more throaty and it growls more. It doesn't sound like a tin can 4 cylinder and besides the fact that it can make better power than the CA with less strain on the engine. It's your opinion that looks don't matter, but to many they are a slight factor in the car and engine they buy...SR looks better than CA IMO...but I would get a CA if I was getting either of those... If you want to criticize something I say...make sure to criticize something I actually said... 
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#15
09-20-2003, 12:42 AM
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Re: Re: What should I do?
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Very Educated post. 
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“Before buying the next go-fast part, invest in the most tunable component yet... the driver's mind”
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