240 motor swap which one do i do?

[fearlife87]

i dont have a whole lot of money to throw into a new motor, im a do it myself kinda guy, and i was wondering which i should go for? my car currently has the KA24E it is falling apart to say the least, im either got some bad piston rings, or some seals going bad, but thats another story. i was wonndering should i rebuild my KA and turbo it? or bore it out, can it be bored? how much? or should i get the KA24DE, and turbo it? everyone has the sr20, which is great and all, but i would rather stick with the KA due to the price difference. and i want something different.

im looking to get the lsd differential, and i want to be able to burn both tires easily, im not sure how much hp i really want, i would like alot of top end, but also i would like to be able to easily drift, (alot of torque)

i have heard with forged pistons and rods, you can turbo the KA24E, and it will push between 400 and 700 hp, is this possible?

i will spend more money on it later, for the turbo and forged pistons n all, but im looking to spend a little on a motor in the mean time, just so i have a replacement when mine does die. and i wanted to be headed in the right direction so i buy a motor i can eventually work with, or just keep mine and have it rebuilt. which ever is cheaper.

i also want to be able to beat anyone with a stock sr20. i want to be misleading. i want some one with an sr20 to be like yea, i'll race, n then i put them to shame...

[Chukidori]

SR20 Is a wonderful idea.

If your KA was in good condition i would say Boost it, But its really not worth it Rebuild and Boost a KA when there are other , cheaper options especcialy not a single cam...

[adrianfromthecastle]

i have heard with forged pistons and rods, you can turbo the KA24E, and it will push between 400 and 700 hp, is this possible?

400 is unlikely, 700 is a dream.

get a ka24de from the classifieds or someone selling it (i wouldnt pay more than 300 for it), get your hands on a cheap t2 turbo, buy a t2 turbo manifold off of ebay, find an intercooler, go to the muffler shop and get some intercooler piping, get your hands on some 370cc injectors, get a safc and wideband, and your good to go with like 210ish at the wheels (@ 7-10psi). This can all be done under 1,000 bucks.

[mr2man07]

youre in the same boat as me. the ka24e that i had in my 89 decided to spin a bearing. i really thought about tearing it down and rebuilding it (but not turbo) and decided it would be damn near as cheap to just get a used ca18det thats already turbocharged.

its like $1000-1200 shipped for a ca18det swap. its ~$600-700 for a rebuilt ka24e. thats including thing such as reconditioning rods, crank, rebuild kit, getting everything cleaned out (coolant passages etc). so for $300 more you can have a better looking(but not as good as sr20det) and better performing motor, with just a tad harder to find parts.

[adrianfromthecastle]

Ive also seen rb20det's for sale around the 1200 range... who doesnt want a turbo charged inline - 6

[Cameron]

SR20 Is a wonderful idea.

especcialy not a single cam...

ehhh, if im not mistaken chuki the Sohc's have a better compression ratio than most would think. there was a dude on the 240sx.org faq that said he could run like 30psi if he felt like it on his ka24e, but i may be wrong.. im stepping out flame me if needed, but no flaming from you chuki

[Chukidori]

I never said anything about their compression ratio.....Its a single cam....it has less valves per cylinder and flows less air...its even more Anemic than the DE and the DE is bad enough.

Its also extremely difficult to make it run 100% with boost...you can boost it but well...drive it normally and you will see once it begins to bog on you..iforget what causes this but its something unique to the SOHC thats overly redundent and unneccesary and it is in the Ecu code itself

[mr2man07]

he can run it on 30 psi if he wants, but so can i on my rod knocking ka24e. a sr20 built as 30psi is going to last longer (most the time) than a ka24 with 30psi thats built.

sure you can do a cheap ka24 build, but like i said a ca18det and like adrians_s13 said, an rb20det would be better in the long run.

In my view, a rebuilt motor isnt as reliable as a used lower mileage one.

just like a rebuilt turbo is the same as above.

[adrianfromthecastle]

30psi on any 4 banger is asking for death

[fearlife87]

the single cam even now has alot of torque. so i figure if i boost it, it will have plenty more, but.. im also got a tire problem, im running on 18 inch rims with 235's or 245's, i cant remember, would i get alot more spin if i went down to maybe a 15? and 205? i havent done this yet because i actually like my 18's and im not sure how much of a difference it would make. if any.

the KA24DE is more expensive than the KA24E. i will probably boost either one, but as some one said earlier, alot of boost on those stock pistons wont last long, thats why i was thinking of rebuilding what ever i decide to get. and having forged pistons and rods, having it bored out. and the best seals and gaskets money can buy, and boost like 30lbs of boost.

does everyone agree the DOHC is a better starting point?

can i get a used w low mileage, or rebuilt KA24DE for 500 or less? if so, where, preferably in the south east, SC to be specific, i would hate to pay god aweful shipping.

[Florida240sx]

he can run it on 30 psi if he wants, but so can i on my rod knocking ka24e. a sr20 built as 30psi is going to last longer (most the time) than a ka24 with 30psi thats built.

Why do you say that? Why is the sr going to last longer than the ka?

[redtop91]

There are almost no aftermarket parts for the SOHC. This thread sucks. Use your common sense, what you want from the car, and your budget as a determining factor on which route you take.

[adrianfromthecastle]

Why do you say that? Why is the sr going to last longer than the ka?

it just will dude... dont ask questions

[redtop91]

JDM dust makes the motor last longer.

[fearlife87]

if you diddnt like the topic, you diddnt have to respond. my financial situation right now is of the issue, im just looking to replace what i got with something else for the time being till i am out of school so then i will have the motor, and i just have to finish it.

i have one more question, how is the KA24DE any different from the sr20? other than the KA24 is bigger right? and the sr is boosted so if i built a KA24DE for boost, it would out perform a sr20 correct? or am i wrong somewhere. my basic idea would be to outperform a standard sr20. which pushes like 14 lbs of boost safely. so if i had my ka boosting 15-20 lbs, it would run faster right? or am i wrong?

[redtop91]

i have one more question, how is the KA24DE any different from the sr20?

Weaker rods, iron block, longer stroke, lower redline, NA. All of these things are easily found by searching but that concept is beyond you...

and the sr is boosted so if i built a KA24DE for boost, it would out perform a sr20 correct?

Obviously because the KA will have an aftermarket exhaust manifold, turbo, injectors, fuel systems, Intake etc.

which pushes like 14 lbs of boost safely. so if i had my ka boosting 15-20 lbs, it would run faster right? or am i wrong?

You are wrong.

[fearlife87]

The SR20DE nonturbo has 140 hp and 132ft. lbs. torque. The KA24DE has 155 hp and 160ft. lbs. torque

i foundthat on a website, noy sure if it's accurate

http://www.240edge.com/basics/ka24de.html

http://www.se-r.net/about/sentra_se-r/specs.html

[adrianfromthecastle]

fyi, the sr20de and sr20det are completely different motors with different compressions, not to mention its ecu is tuned for smaller injectors, along with other n/a stuff.

[redtop91]

30psi on any 4 banger is asking for death

WRONG! http://www.sportcompactcarweb.....html

4G63 @ 52 PSI

[fearlife87]

fyi, the sr20de and sr20det are completely different motors with different compressions, not to mention its ecu is tuned for smaller injectors, along with other n/a stuff.

as is any unboosted car compared to it's boosted brother. point being, it is an sr20 less hp and torque unboosted right? so if i boost a kaDE and have it rebuilt for turbo then it should outperform a standard sr20 turbo.

or am i wrong again?

[adrianfromthecastle]

let me rephrase... 30psi on the OP's budget is asking for death

[redtop91]

Obviously because the KA will have an aftermarket exhaust manifold, turbo, injectors, fuel systems, Intake etc.

You are wrong.

[fearlife87]

that is one bad *** 4 cylinder.

[adrianfromthecastle]

as is any unboosted car compared to it's boosted brother. point being, it is an sr20 less hp and torque unboosted right? so if i boost a kaDE and have it rebuilt for turbo then it should outperform a standard sr20 turbo.

or am i wrong again?

sure...

but you gotta understand, theres no such thing as a factory ka-t. with that being, when you build your ka, your gonna have already aftermarket accessories (tubular manifold, engine management, front mount [most likely], larger injectors, larger mafs), not to mention most people that step into the ka-t's legitimately use t3's, or t28r's at the least. Your comparing an almost fully aftermarket engine set-up against a stock turbo engine.

what do you think

[adrianfromthecastle]

that is one bad *** 4 cylinder.

eh... its an EVO... I wouldnt doubt those numbers.

[fearlife87]

redtop, u got an sr20? if so, after i get this KA24DE turboed correctly, i challenge you to a race. i think the DE wll beat your SR20

[adrianfromthecastle]

redtop, u got an sr20? if so, after i get this KA24DE turboed correctly, i challenge you to a race. i think the DE wll beat your SR20

hahahahaha

you gonna drive to OK?

[fearlife87]

sure...

but you gotta understand, theres no such thing as a factory ka-t. with that being, when you build your ka, your gonna have already aftermarket accessories (tubular manifold, engine management, front mount [most likely], larger injectors, larger mafs), not to mention most people that step into the ka-t's legitimately use t3's, or t28r's at the least. Your comparing an almost fully aftermarket engine set-up against a stock turbo engine.

what do you think

so you have a point.... but

i still havent gotten an answer, would a correctly built KA24DET out perform an SR20DET?

not going super overboard with it, just enough to make it able to handle 15-20 lbs of boost well

[adrianfromthecastle]

your kidding right? Did you read it and not get it? What turbo, what injectors, what mafs, will it be tuned correctly... you cant just say, "y0, iz ka-t bettar den SR20?"

and even if you did get it, and weighed out the differences correctly, say for example, ka-t with sr t25, 370 cc injectors, non tubular exhaust manifold (similar to stock sr) and smic, its paper racing. Theres no right or wrong answer. Will a cheetah from west Africa outrun a cheetah from east Africa?

you failed

[redtop91]

redtop, u got an sr20? if so, after i get this KA24DE turboed correctly, i challenge you to a race. i think the DE wll beat your SR20

Hahahaha anytime you're ready sweetheart. With those kind of questions it'll be awhiles before you get your CAI installed.