KA24DE(T) vs. sr20det THE KA24DE(T ) IS BETTER I HAVE PROOF!!

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
ESPER
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Well, I came to this conclusion> Theoretically, the ka24de(t) IS better than the sr20det. why? well let's look at this basics. Again, the ka24de is

155 HP @ 5500 RPM & 160 lbs. of torque @ 4400 RPM

while the sr20de is 158 HP and 138 lbs of torque

Now strap the turbo on the sr20de and you get the sr20deT with these stats

(s14) approx. 220 HP and 202 lbs. of torque (now i am not sure about the rom's but i am sure they are like at 6500 and 5500 respectively)

now strap on the turbo on the ka24de and you get almost 300 HP (? i believe depending on the manufacturer) or at LEAST 220 EQUAL to the sr20det, but one thing is for certain you get more TORQUE!! Wouldnt that qualify the ka24de being "better? ?the only thing i am not sure of is the power loss on RPM's although car & driver mag said that the ka24de should be driven to its 6000 redline for max power. and more thing, the supra shares similair engine peak performance

it is 320 HP @ 5600 RPM and 315 lbs' of torque @ 4000 RPM

therefore the ka24de should have no problem being driven as a supra should

however the only donwside is that when i push my s14 do the redline the gas meter dramatically drops yikeS!! why is that?? ok well thanks everyone!!


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blink0r
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This is far from proof, this is skepticism. I don't think anyone on this forum has first hand proof (owning both engines).

When you turbo the KA, won't you lose reliability? Remember, the sr20 is designed to run boost.

Emperor240
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you gass dramaticllay drops because at the 6000 redline (by the way you loose power after aprox 5500) because your egnine is igiting fuel 100 times per SECOND meanding your FIs have to squirt fuel into your cylniders 100 times a second. therefore you use a hell of a lot of gass :nono

Matthew
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You are making the assumption that both car owners are going to stay at fairly low levels of boost.....Start trying to make horsepower over 300 on the stock internals, and we'll see which motor last longer.I cant believe i ever responded to this!

MaineExport
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One mistake in your logic.... the SR20DE and the SR20DET are two completely different engines. They have a different bottom end entirely. So, if one were to build an SR20DE(t) it would NOT be the same as an SR20DET.

Jubs180
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also, not the same turbos are being used.

the T25 gives the SR the ~200hp rating.

strap a T25 on a KA, and it WON'T be 300...

the turbo kits that are out there use like a T3/T4, a T04B, or another larger turbo..

and HP ratings do not make one engine better than another :D

-Dan

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Megaseth
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see what happens when you assume...

drifter
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But isn't the KA24DET smog-legal? I heard that you can't smog the SR20DET by any sense of the word....(except if you KNOW somebody....) !

mojo22
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even if you know somebody....its still not "legal" to get a car to pass, it may get you by, but legality is a different issue. but of course we all only use modded cars "off road only", don't we guys?

in my opinion, comparing the 240 to a supra is an apples and oranges comparison. i have a lot of respect for a supra, but saying that this or that about a 240 acts like one is pointless. a supra is capable of 35 lbs. of boost on the stock engine. no built bottom end, no head gasket, just bolt on a new header, turbo and fuel system and you can blast 30 plus lbs. in that baby. 2 bar is no problem all the time with the right tune. i haven't seen anybody claiming even 2 bar on their KA or SR, much less to do so safely.

love your 2FO for what it is, an affordable, fun car with great potential, that can have just as good or better (especially for the money) power to weight ratio than a supra.

plus, people like nice cars, but no kids walk up to see my 240, which i like so it is left alone. but right now there is a supra in my driveway and i caught neighboorhood kids way up in my yard looking at the car.....not cool IMO.

Atom12
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blink0r wrote:This is far from proof, this is skepticism.
Actually the word is "speculation". You however, are "skeptical" of his hypothesis. I know, I'm a jerk :pface

ESPER
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sorry if i offended any of you guys (damn didnt expect people to get so ehated ahaha) but nevertheelss i learned a lot from this post! thanks!! by the way when turboing the ka24det is it smog legal??

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Megaseth
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Im pretty sure it is. if other guys can put bolt on turbo kits and get them smog passed, then why cant we.

FrEaK
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I thought we all agree'd that it's nearly impossible to prove which is better a long time ago....

Stoneage_Turbo
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"while the sr20de is 158 HP and 138 lbs of torque"

where are you getting your figures? ususaly hp is around 141 , i wish i had 158 stock . did the silvias sr20 come with more hp or what ?maybe haveing the thing turned the right way driveing the rear wheels allwed for a more effiecnt intake/exaust manifold manifold

now heres an idea , someone get some pics toghter of the bottom ends of boath engines , im thinking my sr20 is built a a liitle more stout , my bottom end will see 500hp without mods to it , only problem the DET guys run into at those levels in the bottom end is spun bearings

but me breathing 7psi on mine i wont see the problem plus ill be running a t-25 and make around 200hp with the cams im running and such this spring , im not after much more , just want to make it a little more ballzey

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blink0r
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Atom12 wrote:Actually the word is "speculation". You however, are "skeptical" of his hypothesis. I know, I'm a jerk :pface


Whatever. I "speculate" that i'm going to beat you over the head with a 2x4. Better?

TrueSlide
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Yes, Also the SR20DET was BUILT for a turbo, Tha KA was not. So if you took the turbo off a SR20, the compression is so much lower then the KA, thus which takes away power. But since it was built with a turbo, factory it provides a better stock engine. The KA is better due with a larger displacement, and able to produce higher torque. But its down side is it coems weak from the factory and is built weak.

So still no matter how you argue is all a matter of opinion of what u think is better. I would take any engine, the both are good :)

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Tino
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Megaseth wrote:see what happens when you assume...


makes an asss outa you and me

240SXer
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The way i've looked at it is KA24DET is not smog legal in CA, nor is the SR. The SR is faster and cheaper. SR wins. You get pulled over with a KAT you're ****ed. You get pulled over with a SR you're ****ed. Same difference. Might as well have a faster engine.

David.

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cnichols
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TrueSlide wrote:Yes, Also the SR20DET was BUILT for a turbo, Tha KA was not. So if you took the turbo off a SR20, the compression is so much lower then the KA, thus which takes away power. But since it was built with a turbo, factory it provides a better stock engine. The KA is better due with a larger displacement, and able to produce higher torque. But its down side is it coems weak from the factory and is built weak.

So still no matter how you argue is all a matter of opinion of what u think is better. I would take any engine, the both are good :)


I don't know if I would go so far as to say it was built weak...I admit it wasn't built with a turbo and has higher compression. This, in turn, doesn't allow for as much boost, but makes it more fun to drive around town in the lower RPM range...and that is exactly why I LOVE my KA24DE-T!!! Damn thing is insane!!!!!! You don't even have to rev it hard to get some boost out of it.

FrEaK
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Someone close this thread... its just another my car is better than your car... there is no fact involved its really all opinion...

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Tino
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way to be freaky on your 1000 post

FrEaK
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Visit my 1000 post party in the general forum :)

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C-Kwik
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So how exactly is the SR built stronger than the KA? As far as I know all parts are made from similar materials except for the block. The SR has lower compression, so it obviously has an advantage for higher boost since it will have a higher threshold before detonation starts to occur. The pistons on the SR should have a thicker ring land, but that really only makes a difference when detonation occurs. And if you tune it correctly, this should not be an issue.

APEXi240
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Almost any engine can be tuned to take huge amounts of boost. There is a Miata (I think covered in a Turbo mag, I have it somewhere) running 25psi on a stock block. He ran a 10.98 on street tires. It was a purple Miata if anyone knows what I'm talking about. He said he's never blown the engine, it took months of fine tuning. He then proceeded to say its on its last leg, but he had it running boosted for a while...

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1dollar240
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Also- not sure if anyone brought this up- you can get an SR for about the same price as a good turbo kit, but most KA's are high mileage and would need rebuild/prepping to be ready for a turbo. Its easier to get an SR.

Zebrahead
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I can't believe I just read that post. That's the dumbest thing i've ever heard. So many factors were completely ignored. I could equate his conclusion to one I will make between motorcycles and cars.

Car have four cyclinders, and bikes usually have the equivilent to one or maybe two. Therefore cars are much faster.

Look at me mommy, I'm smart!

Nick.

Nismo_Freak
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mojo22 wrote:even if you know somebody....its still not "legal" to get a car to pass, it may get you by, but legality is a different issue. but of course we all only use modded cars "off road only", don't we guys?

in my opinion, comparing the 240 to a supra is an apples and oranges comparison. i have a lot of respect for a supra, but saying that this or that about a 240 acts like one is pointless. a supra is capable of 35 lbs. of boost on the stock engine. no built bottom end, no head gasket, just bolt on a new header, turbo and fuel system and you can blast 30 plus lbs. in that baby. 2 bar is no problem all the time with the right tune. i haven't seen anybody claiming even 2 bar on their KA or SR, much less to do so safely.

love your 2FO for what it is, an affordable, fun car with great potential, that can have just as good or better (especially for the money) power to weight ratio than a supra.

plus, people like nice cars, but no kids walk up to see my 240, which i like so it is left alone. but right now there is a supra in my driveway and i caught neighboorhood kids way up in my yard looking at the car.....not cool IMO.


Uhhh ... no. You may see "stock internals" but believe me those have been out for stress testing, and alot of shotpeening and other strengthening processes. Stock internals on the Supra hold about 600whp, from there its all tuning and making the bottom end a bit stronger. The internals dont last long at all either. If your gonna say that then the KA can hold 10psi, although its only for a month. And dont say "Ive got a friend who... blah blah". I know the secrets to these so-called stock bottom ends from the owners of the cars. SW, Darren, Clint Pohler, Chris Johnson, and Kean all have "stock" internals on their 10-sec and faster Supras.

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Tino
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Thats what I'm saying, I mean how long does a boosted tuned engine last. Like a sr20det at 300hp approx. If you only really abuse it at racing here and there not often how long will that last?

APEXi240
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The reason the SR is better in my case...is that for a KA-T I'd have to get my engine rebuilt (105k), and I'd need my transmission rebuilt (grinds 2nd and 3rd). I'd much rather have a lower mileage engine...That's one of the only reasons why I want an SR.

240SXer
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Exactly, I just spend 1,400 getting my transmission rebuilt. I would LOVE to have spent just a bit more for an SR. But too bad I didnt have a bit more :(

David.


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