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g81981
03-03-2000, 08:21 PM
Does the SR20DET or the KA24DE have a V-spec(v-tech) feature? Also is the SR20DE better than the KA24DE?
JonCarson
03-04-2000, 12:18 AM
<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by g81981:
Does the SR20DET or the KA24DE have a V-spec(v-tech) feature? Also is the SR20DE better than the KA24DE?<HR></BLOCKQUOTE>

If you're talking about V-Spec as in Skyline GT-R V-Spec, I don't believe that's a reference to the valve train. As far as I know, V-Spec is the 'race ready' version. I'm sure that our friends at Motorex can elaborate.

As to whether either the SR20DE or KA24DE is a better engine, it depends on what you want and what you're using it for. I'll be brief and maybe others will fill in the details. The KA is practically bullet proof. It'll take lots of abuse. Keep in mind that it's mainly used in Nissan trucks and vehicles in Japan such as the Largo van.

The SR20DE is higher tech, but not as tough. It revs higher and has greater potential for extreme tuning.

Check the 240SX forum for details concerning turbo charging either engine.
noelsaw
03-04-2000, 11:06 AM
<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by g81981:
Does the SR20DET or the KA24DE have a V-spec(v-tech) feature? Also is the SR20DE better than the KA24DE?<HR></BLOCKQUOTE>

The SR20DET is a turbocharged version of the SR20DE engine. The SR20DE is an inline 4 all aluminum alloy head and block with 2.0L of displacement, double overhead cams, and 4 valves per cylinder. The US' SR20DE engine (used in Sentra SE and G20) don't have variable valve timing (VTEC in Honda-speak). The Japanese versions of the SR series engines have Nissan's version called Neo VVL.

The KA24DE is a normally aspirated engine inline 4 with 2.4L of displacement, double overhead cams, 4 valves per cylinder, and an aluminum head and iron block.

To find out more about Nissan engines, visit our Engine Catalog in our Nissan News section.

[This message has been edited by noelsaw (edited 03-04-2000).]
**DONOTDELETE**
03-04-2000, 02:24 PM
<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by g81981:
Does the SR20DET or the KA24DE have a V-spec(v-tech) feature? Also is the SR20DE better than the KA24DE?<HR></BLOCKQUOTE>

The SR20DE is more suited for high-rpm sportscar driving while the KA24DE is more for sedated driving in sedans...unless you turbocharge it like some people on this board.
**DONOTDELETE**
03-04-2000, 03:41 PM
Well since I work for Nissan I can elaborate on KAs... their bottom end is not as good as everyone thinks it is. I have seen a few Altimas with rods sticking out through the block. The rods are ****ty, pistons are average, its got a diff design piston top than a SR thats why it resists more detonation than the SR motor, why peeps say it can take alot of abuse. When U start to tear apart both engines U will see that the SR is supperior to the KA block, its got many strenghtening features built in it. Engine is ready for the turbo, the oil passages for turbo piping is there all U have to do is tap it. Also KAs have a great reputation for oil pumps, and what does turbo need for life ?? Oil, when the pump starts to go down... so does the life expectancy of the turbocharger unit. I myself wouldn't wanna turbo a KA, hot setup would be a KA crank in a SR block, which is possible, it will increase the displacement of the SR and give it more low end power and lots of exhaust backpressure for quick turbo spoolup resulting in great throttle response- which turbos are not know for.. and great power.
'97 S14 SE Turbo
03-05-2000, 08:45 AM
Careful there, you are looking at the Altima's KA, not the S13/S14's KA...

The KA24DE in the 240SX have different features compared to the KA24DE in the Altima. Not a fair comparison.

The FR configed KA24DE have piston oil squirter, solid girdle and a tough block. Basically freatures a turbo block needs. The FF SR20DE would require some drilling to access the oil passages for the oil squirter. And a cast iron block is still stronger than an aluminum block.

I wouldn't compare the Altima's KA24DE with the S13/S14's KA24DE. Totally different beast. It's like comparing the FR SR20DE to the FF SR20DE.The oil passages and water passages are also readily accessable on the KA24DE. The oil filter adapter has two fitting location. One is occupied by the oil pressure switch (easilly changed to oil pressure gauge) and the other one is plugged. All one have to do is unplug it and screw in the oil line (I had a 90 elbow fitting installed).

<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by Mike Jez:
Well since I work for Nissan I can elaborate on KAs... their bottom end is not as good as everyone thinks it is. I have seen a few Altimas with rods sticking out through the block. The rods are ****ty, pistons are average, its got a diff design piston top than a SR thats why it resists more detonation than the SR motor, why peeps say it can take alot of abuse. When U start to tear apart both engines U will see that the SR is supperior to the KA block, its got many strenghtening features built in it. Engine is ready for the turbo, the oil passages for turbo piping is there all U have to do is tap it. Also KAs have a great reputation for oil pumps, and what does turbo need for life ?? Oil, when the pump starts to go down... so does the life expectancy of the turbocharger unit. I myself wouldn't wanna turbo a KA, hot setup would be a KA crank in a SR block, which is possible, it will increase the displacement of the SR and give it more low end power and lots of exhaust backpressure for quick turbo spoolup resulting in great throttle response- which turbos are not know for.. and great power.<HR></BLOCKQUOTE>
**DONOTDELETE**
03-08-2000, 06:28 PM
Well the blocks are still made out of the same material no matter what, and there are no strenghtening features built into the RWD block other than the casted motor mount anchor points. Why would U wanna compare the RWD SR20 to a FWD SR20, if U compare the 54C block to the RWD SR20 block the 54C is stronger and its used in the RNN14 GTi-R. I dunno where U get the stronger blocks from ?? All the SR20 blocks are same strenght but the 54C, which is reinforced.
'97 S14 SE Turbo
03-09-2000, 08:20 AM
The 54C would be an exception, specially built for homologing(sp?) for world rally. As for the FR KA being strong, well, you said it yourself, the KA from the Altima sucks, but the KA in the 240SX is a differnt engine built for a different purpose, and most places don't see much of hte FR KA engine. I've never heard anyone complain about the reliablility of the FR KA on the 240SX list. But, a cast iron block is still stronger than an aluminum block.

<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by Mike Jez:
Well the blocks are still made out of the same material no matter what, and there are no strenghtening features built into the RWD block other than the casted motor mount anchor points. Why would U wanna compare the RWD SR20 to a FWD SR20, if U compare the 54C block to the RWD SR20 block the 54C is stronger and its used in the RNN14 GTi-R. I dunno where U get the stronger blocks from ?? All the SR20 blocks are same strenght but the 54C, which is reinforced.<HR></BLOCKQUOTE>
**DONOTDELETE**
03-10-2000, 09:33 PM
any nissan with the KA has great reliability--at least according to various magazines. i know that the frontier's KA is probably one of the toughest engines nissan makes. i hear that all KA's have good torque--good for the altima especially if it's full of people

i still think the 240 should've gotten the SR20 though