Reliability of KA24DE-T vs. SR20DET?

My 2 cents:

KA=truck motor

SR=purpose built turbocharged performance motor

You can disagree if you want, but I beat the hell out of my SR20DET (I have a 180SX & live in Okinawa Japan) and it's NEVER failed me! I'm running 1.3 Bar of boost with a Garret GT-25R hybrid (T-28 exhaust section with T-04S compressor), HKS 264 cams, & more-about 400 Hp. The important thing with the SR (or any engine you modify) is the tune. You have to have the correct air/fuel ratio at all times under boost, if not, ANY engine will be toast in short order. I prefer the SR due to the massive amount of support & aftermarket available. The KA just isn't designed to do the same thing...does that make it a bad motor, no. It's just not optimum for a truly high performance application.

you do know the KA was used in racing way before the SR was even thought about? LOL

was there EVER a Turbo KA engine from the factory? People keep telling me there was and I have NEVER heard of this before.

there never was

im not engine builder but from what i have read and know about the specs of the ka24de and the sr20 is this. first of all i own a 240sx ka24de RWD engine and my friend owns a sr20 in a G20 FWD Both Stock! I smoked him with the 240 sx with no mods! the diffrences with the 2 engines is this. the ka24de has a longer stroke. meaning that the pistions travle a greater distince VS the sr20. The sr20 however has bigger pistons and head meaning that it is good for horse power. however sometimes Tork is what is going to win your race next to lets say a Camaro,Z28 because by the time your horse power builds up the z28 is going to be gone from the amount of tork behind the engine and the RWD. so this is what im trying to say.. The RWD 240sx which has more tork than a g20 which has more Hp and less tork!
do the math.
open for smart ass remarks on my posting!
thanks!

im not engine builder but from what i have read and know about the specs of the ka24de and the sr20 is this. first of all i own a 240sx ka24de RWD engine and my friend owns a sr20 in a G20 FWD Both Stock! I smoked him with the 240 sx with no mods! the diffrences with the 2 engines is this. the ka24de has a longer stroke. meaning that the pistions travle a greater distince VS the sr20. The sr20 however has bigger pistons and head meaning that it is good for horse power. however sometimes Tork is what is going to win your race next to lets say a Camaro,Z28 because by the time your horse power builds up the z28 is going to be gone from the amount of tork behind the engine and the RWD. so this is what im trying to say.. The RWD 240sx which has more tork than a g20 which has more Hp and less tork!
do the math.
open for smart ass remarks on my posting!
thanks!
it's torque. Torque = HP...it's where you make your power in the rpm range that changes the peaks.

An SR20 from a G20 is a totally different animal than a SR20DET.

thats funny totaly diffrent its the same block and head the only diffrent thing is the piston's injectors and a turbo. its the same engine dude from what ive read sr20 has less torque but more Hp than a ka24de

Ok i am new to the nissan seen, but for past couple weeks, and months i have been doing but researching what i should when i get a 240 that im looking forward to buy before feb. So im taking this time to look into what way i should go.....the ka24det or the Sr20Det. i have pretty much made my mind up just looking for the what seller. anyways. Is it just me or do some people tend to leave out what type of Sr20Det motor they are talking about or is that person just talking about the redtop. How about comparing to a blacktop (s14 or s15) especiailly the s15 blacktop. I think that a lot of time people talk about the redtop because it is most commonly heard about correct??? Why dont you compare the Ka-T to one of the blacktops. And when someone posted cant remember who was saying to fix up the Ka it would come to a total of $2500 i dont remember seeing any turbo added to that price or did i just miss the turbo added into that price??? Sorry if i mislead any information in this thread. and yes i understand that that blacktop only had 20 more hp than the redtop.

thats funny totaly diffrent its the same block and head the only diffrent thing is the piston's injectors and a turbo. its the same engine dude from what ive read sr20 has less torque but more Hp than a ka24de

block is different, just the transmission mounting should clue anyone in on that. Cams are different. I believe the G20 fires in a different order than the JDM SR20DE. Intake is different....

Regardless look at the specs for the FWD vs RWD SR20DE:

FWD: 108kW (144hp) / 178 n-M (131 ft-lb)

RWD: 119kW (160hp) / 188 n-M (139 ft-lb)

to me a 16 hp difference in both NA engines is no where near the same engine.

You are right about the RWD version having slightly more HP (5hp) and a lot less torque (21ft-lb) than the KA24DE

i learned somthing new i didnt know the block was diffrent. i thought a sr20det FWD will bolt rite in a FWD G20.
correct?

horizontal distance is important in determining the torque in an engine. when a piston is at the top of its stroke, the connecting rod points straight down at the center of the crankshaft. No torque is generated in this position, because only the force that acts on the lever in a direction perpendicular to the lever generates a torque. meaning the longer the stroke the more the torque as stated the ka24de is better for torque which will win you the race!

a message for harlockssx dam dude you have no idea what your talking about your from japan. whats the point for you to build a race i mean rice car anway their so mutch trafic their their is no where to go. :-)
Just playing dude

i learned somthing new i didnt know the block was diffrent. i thought a sr20det FWD will bolt rite in a FWD G20.
correct?

horizontal distance is important in determining the torque in an engine. when a piston is at the top of its stroke, the connecting rod points straight down at the center of the crankshaft. No torque is generated in this position, because only the force that acts on the lever in a direction perpendicular to the lever generates a torque. meaning the longer the stroke the more the torque as stated the ka24de is better for torque which will win you the race!

the only problem is there isn't a FWD SR20DET that I know of.

the piston stuff is not so direct on the torque that is output...

There is a FWD SR20DET, in the Bluebird and Pulsar GTi-R (or something like that), they can be made to fit in a G20. Damn you to need to stop this, especially in this 8 months old thread.

There is a FWD SR20DET, in the Bluebird and Pulsar GTi-R (or something like that), they can be made to fit in a G20. Damn you to need to stop this, especially in this 8 months old thread.

I was talking USDM...but what difference does the age of a thread make...it would be alot more helpful if people bumped a related topic than start another one with the same title.

im not engine builder but from what i have read and know about the specs of the ka24de and the sr20 is this. first of all i own a 240sx ka24de RWD engine and my friend owns a sr20 in a G20 FWD Both Stock! I smoked him with the 240 sx with no mods! the diffrences with the 2 engines is this. the ka24de has a longer stroke. meaning that the pistions travle a greater distince VS the sr20. The sr20 however has bigger pistons and head meaning that it is good for horse power. however sometimes Tork is what is going to win your race next to lets say a Camaro,Z28 because by the time your horse power builds up the z28 is going to be gone from the amount of tork behind the engine and the RWD. so this is what im trying to say.. The RWD 240sx which has more tork than a g20 which has more Hp and less tork!
do the math.
open for smart ass remarks on my posting!
thanks!

Alright, the KA does have more torque(DUH?). It also has a larger bore and stroke than the SR. If you ever race someone with more horsepower than you, you will notice when you hit third gear, they kind of just leave you. It happened to me when I raced a 5.0 before the turbo went on. I was even with him until I hit third and he walked. You are not going to beat a Z28 stock. Even if you have 2000ft/lbs of torque and 25hp, that just means you'll have really good 60' and 330' but a honda civic stock is going to beat you. HP and Torque are equally important. Increasing dispacement in general usually gives equal increases in torque and HP. Stroke will usually tend to give slightly more torque than hp.

lodownlv, u are incorrect, sr20det rwd and fwd are slightly similar and yet all the parts are different, if you read the whole thread you will find that out. rwd does not use distributer, piston sizes and all are not the same either. They just named the fwd sr cause it is 2.0 liter.
KA was designed for trucks, lots of torque. SR was designed for lighter small sports cars, it has almost 50:50 weight distribution (cause aluminum), can rev higher and longer and is more of a road racing motor. Any engine can be built for different applications, for road racing SR will be more successful in doing so imo. Plus I like to make the car different in some way, the handling becomes mush better with sr too.

their isnt a honda civic made that can beet my car. so i dont even get what your saying.
LOL by the way i can smoke a z28 and 5.0 mustang no problem! ow and since your soo smart explane the relationship of hp to torque

Are you mentally challenged or are blind? He said that no matter how much torque you had, you could be beaten by a stock Civic if you didn't have any horsepower. And tell me again how you can beat 5.0s and Z28s?

their isnt a honda civic made that can beet my car. so i dont even get what your saying.
LOL by the way i can smoke a z28 and 5.0 mustang no problem! ow and since your soo smart explane the relationship of hp to torque

No but there are plenty of respectable and ricer civic drivers that can "beet" you in the 2nd grade spelling bee.

I'm sure you can smoke 5.0s and Z28s, its not that hard on the internet.

Horsepower is how fast you can spin your torque. Ever hear of somebody say they need to make X amount of horsepower to acheve Y amount of speed?

Since your so fast, why don't you post up some pics or timeslips of your car? If it is stock, ever hear of a Type R civic? He would probably hand you your ass with a recipt.

its all good dosnt realy matter if i can spell in a forum or not. im getting my ka rebuilted next week im going with drop forged pistons and rods and im getting full head work including oversized valves im going to also get the vband turbo. no honda is going to smoke me honda lover

CR from how stuff works
So if you multiply torque (in pound-feet) by engine speed (in RPM) and divide the product by 5,252, RPM is converted to "radians per second" and you can get from torque to horsepower -- from "pound-feet" to "foot-pounds per second."

uhh whats wrong with HONDAS? i mean KA-T is cool and all but a turbo B18 or H22 could get u.

plus how did u beat the Z28 SS ? and 5.0?
1nc i got a 5.0 atuo, but a Z28 ss handed over my ass (it was moded)

Are you mentally challenged or are blind? He said that no matter how much torque you had, you could be beaten by a stock Civic if you didn't have any horsepower. And tell me again how you can beat 5.0s and Z28s?


you couldn't have torque without horsepower, it would be mathematically impossible..

"You may be surprised, I know I was, but horsepower is simply a calculation based on rpm and torque. Dynos and rolling roads only ever measure torque. Horsepower is calculated after. Here's the formula:



Horsepower = Torque * RPM / 5252


So how is this formula arrived at, and where did 'horsepower' come from?

Well it's all down to the Scottish engineer James Watt (1736 to 1819), he established that a horse could pull a 550lb weight up from a coal mine at a rate of one foot every second, for an eight hour shift. This converts to 33,000 foot pounds per minute. He published these observations, stating this figure to be the equivalent of one horsepower.

We need to convert from the rotary motion of an engine to a linear motion, like the horse example. Remember we can only measure the torque of the engine, this is expressed in pound feet. A pound foot of torque is the twisting force necessary to support a one pound weight on a weightless horizontal bar, one foot from the centre of rotation. Lets rotate the one pound weight one revolution, the distance travel is 6.2832, that's Pi multiplied by the diameter, 2 feet. We have now done 6.2832 foot pound of work.

One horsepower equals 33,000 foot pounds per minute, so if we divide 6.2832 in to 33,000 we can conclude that we at 5252 rpm we are producing one horsepower, we are moving our one pound weight 33,000 feet every minute.
Therefore if we multiply the torque by rpm and then divide by 5252 we can calculate the horsepower.

Lets see what we now know:

A car will be accelerating hardest in any given gear when at its peak torque
Horsepower is a calculation based on torque.
Torque means nothing without knowing what rpm it occurs at.
Horsepower factors rpm in to the torque equation.
It's better to make torque at high rpm rather than low rpm, so we can take advantage of gearing


Answer: Horsepower is King! (the more horsepower the more torque at the wheel)

Back to the large and small engine example at the beginning, which will accelerate a car down the quarter mile the quickest? They both put out the same torque at the wheel, so I guess as the small engine is considerably lighter, it's the winner. Again its not quite as straight forward as that. What we are really interest in is the average torque at the wheels through out the complete run. High revving engines by there very nature have a small power band, in other word there torque curve is not very flat compared to large displacement engines. To keep the average torque at the wheel as high as possible we need loads of gears, and changing gear takes time. So to counter its weight disadvantage the large displacement engine has high torque through out the working rev range, therefore needing less gears. Never straight forward is it!

There you go, Torque v Horsepower according to my world!"

-Julian
Interesting article (http://www.v8914.com/Horsepower-v-torque.htm)

:loser: Wow, thanks for the info I didn't read.

it sounds to me that he just got done reading some info of the internet and now he feels smart so he is posting all shit because he feels that much more smarter now. No im not talking about you sr20power. Its just that lodwndouche or whatever his name is keeps on bringing up this horsepower torque thing in every post to make him look like he is smart or something and knows what he is talking about. But he continually shows us he is not to smart, because he thinks a rebuilt engine with a turbo will smoke any honda out there. I guess he's going to race stock hondas with his moded engine so he can feel fast too. I dont no man you seem like a douche bag that should be driving a civic to me but o well what do i know. Post pics up of your rebuilt engine with turbo and shit so we can see your grandmaster setup....

I dont no man you seem like a douche bag that should be driving a civic to me but o well what do i know.


lets improve on our trash talk ok? LOL









He should be driving a rusty old school civic with 15" cheapy wheels, neon underbody kit, led washer nozzle lights, NOS floormats, and APC seat covers...... ain't no way you can forget the weld on shit can muffler either.


some hondas are cool

I especially like 90-93 4 door accords with H22's.....
:iceslolan

uhh whats wrong with HONDAS? i mean KA-T is cool and all but a turbo B18 or H22 could get u.

That is a completely uneducated response. I have only seen a couple B18 turbo cars run in the 10s. One was in Dsport and was running 10:1 pistons and 29psi of boost with FAST. Talk about precise tuning!

Key word for that kid is "He's getting," not "he's building,"

And the other key word is

rebuilted

:lol2: :lol2: :lol2: :lol2: :lol2: :lol2: :lol2: :lol2: :lol2: :lol2: :lol2:

im building from the ground up i just got the car and blew the head valve seals and gaskets. im building!

Don't you mean "rebuildingted"?

lol, i dont seem to like that guy, everythread he posts in he pisses people off..trying to say hes all smart and everything..and for the record you are re-building, not building... unless your handmaking everysingle part..which i doubt..

Don't you mean "rebuildingted"?

no hes reblingen it dawg

mad tyte jdm shit, hes got the engine dress up kit, the chrome radiator cap, the chrome oil cap, the chrome spray paint on his steelies haha, and his secret drift forumla tire setup, 4 different brand bald used tires.

i dont piss everyone off and im not even trying to. I actualy help a lot of people. And ok im rebuilding from the ground up.
"i am smart by the way"

and for SR20DETpower im not going to mess it up like pimp my ride did. im going to make it a nice car and not going to let anyone down.

well my mommy says im smart too!!! :icon16:

I'm dumb as shit.

im so dome I kant evean pass sicksth gurade

i never said i was a rocket scientist just smoke some refer and get of my back :-)

Interesting reliability forum, would you please stop all the trash talking and get back to reliability question on sr vs ka. Nice info SR20DETpower, by the way you can find more information on torque and hp in how stuff works. But thats just so off topic.

i never said i was a rocket scientist just smoke some refer and get of my back :-)

smoking refer+240sx=BROKE AS HELL!! lol, were just messing around with you.

i think any engine with high boost will be less reliable in the long run. A fresh KA24E with low compression, such as the 89 engine. Could probaly run 6psi for a very long time. Im sure it will wear out faster the an N/A KA but it will probaly last a long time if you dont beat on it and change the oil every 3k miles or sooner.

Basic matinence and proper tuning are your best bet for making your engine last. But more power most often means a shorter life.