reason im asking this is because i came across this 1991 240sx for $1,500, and im thinking of buying it.
only thing is that it has an automatic transmition. it comes with 155hp stock and it has 90,000 miles{pretty good for its age}.
now, 2 questions :
a - can i put a manual transmition in it and how much will it cost me?
b - what is sr20det, what does it do, and how much does it costs?
c - how much will it cost me to get this car to 250 hp?  

Ok, well, first off, if your not mechanicly inclined, and if your the type of person that has to ask how to do a swap, you shouldn't really look to do it. Basicly, what I'm saying is, if it's an auto, and you know you want a 5 speed, and you know that you don't have the knowlege to swap in a 5 speed in an auto car, then find a 5 speed car.

An SR20DET is the turbocharged version of the 2 liter SR20DE Nissan four cylinder engine. It has lower compression pistons, and is "built" for turbo. No Nissan automobile sold in the United States has ever come factory with an SR20DET, which means that if you want one, you have to have one shipped over from a junkyard in Japan. This means ***

An SR20DET puts out roughly 200hp in stock trim, I believe. Turning up the boost a bit, a 3" turbo back exhuast, and other bolt ons can easily yeild a 50hp gain.  

DRSLT1 is right. the SR20DET is a engine that is only used for japanese-made nissans. because of the high lead usage in japan for the engines that they use, they put some sort of 97 or 98 high octane gas into their cars. all of the SR engines are good.. but personally i would put the SR26DETT.. top of the line HP.. thats all you need  

RB26dett, im sure its a typo dont want anyone mislead.  

The guys above are correct. Couldn`t have said it better myself.

There are a few places on the internet that will order, ship, and install an SR20 into a 240. Granted it is a few thousand dollars, but I think it is worth it.

Here is an SR20DET mostly stock.


After a few hundred bucks(and yes I am laying on the sarcasim).
 

could you buy a turbo intake and turbo kit and "make" one and in the end be ahead because of the higher comp pistons in the non turbo???  

lots of people put a turbo on the stock ka24de  

does the sr20de with the turbo conversion make more torqe/hp than the sr20det stock  

the stock engine is a ka24de.  not an sr20de.  the ka with turbo conversion can make something like 400whp. im not sure about the sr20det swap  

Your best bet would be to wait untill KATwo40SX gets on. He owns a 240 with the stock KA in it and has a turbo on his. He puts out about 240 hp but i think is currently fixing to up his parts and make something like 400hp. Just wait untill he gets to your post.  

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Your best bet would be to wait untill KATwo40SX gets on. He owns a 240 with the stock KA in it and has a turbo on his. He puts out about 240 hp but i think is currently fixing to up his parts and make something like 400hp. Just wait untill he gets to your post.

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240sx sold in US = KA24E (SOHC engine, 89-90) and KA24DE (DOHC engine, 91-98)

240sx sold in Japan, Canada, Australia, Europe = SR20DET OR CA18DET

All models from around the world were turbocharged.  Since the engines couldn't pass our strict emissions testing, they gave us the motor found in the early Nissan trucks (KA series engines) minus the turbocharger.  They figured, if we couldn't have forced induction, we should at least have a little more displacement.

No 240sx ever sold came with a non-turbo SR20DE engine.

Stock HP on the SR20DET engine (all models) was around 220bhp, which translates to around 190whp.  The engines are a great platform, especially if you're the type of car guy who never wants to open the hood for anything.  It's a stock forced induction engine, likes to rev high, and can handle considerable boost levels from the appropriate turbocharger before needing any internal upgrades.  The support market is large, but a bit costly, since nearly every aftermarket piece is from Japan.  The SR20DET would be very low maintenance and would require no extensive tuning until you began modifying systems on the engine, such as fuel, boost, etc.  The engine has also been more than proven, via race circuits and the drifting craze.

The stock KA24DE and KA24E engines can be surprisingly responsive to adding a turbocharger.  While the KA engines don't rev like the SR20DET, they make more torque and at a much lower RPM range.  The torque curve on the KA engines is flatter.  But, again, you can't rev the engine much past 7,000rpm for extended periods (you wouldn't need to).  The KA24DE can handle upwards of 350whp (which is about 390ish bhp) on stock internals.  This, of course, requires the best of tuning solutions (in terms of engine management) and a turbo large enough to give that kind of power efficiently, without becoming a heat pump and requiring boost levels nearing 20psi.  If you wish to go a step further, as I've chosen, the internals can be upgraded.  At that point, the sky is the limit.  However, if you plan on upgrading the internals and/or adding a turbocharger, plan on spending some $$$$$.  The parts aren't cheap, and if you don't do the installation yourself, the labor will be incredibly expensive, equal to or more than, the SR20DET+installation price.  

As for the CA18DET, well, it's worthless.  It's a 180ish bhp 1.8l turbo engine in a car nearing 3,000lbs.  Junk.  Incredible waste of money and time.


Here's a pic of my turbo KA24DE


 

big turbo and bost tap youl be away laughung  

two problems with your post.

Canada never got turboed 240sx, i think we got a shitty turboed 200sx in the 80s but it wasnt the ca18det, something similar, and shittier..

also the ca18det is a good engine, it just takes a bit more work, although very tuneable. It can handle the same hp or more than the sr20 on stock internals.  

^one more problem is that yourmums... is posting on a thread that hadn't been touched it two years lol.