Ka24e vs. Ka24de

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kevin-bullis
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Ka24e vs. Ka24de

Post by kevin-bullis » Fri Dec 03, 2010 9:48 am

I'm sure this has been asked before..but I can't for the life of me fnd it on a search. I want to rebuild a motor. But what wouldl be the better bet for drifting and power a Single slammer or a de? Thanks for all your help!
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Jmcc
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Post by Jmcc » Fri Dec 03, 2010 11:08 am

i don't think you can really say if one is better than the other. thay are both really good motors. i think it would come down to what motor you like more.

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Post by TinyT » Fri Dec 03, 2010 12:36 pm

of course the de is better. you make power by getting air and fuel into the motor. at a certain point only having 8 valves is going to be a limiting factor.
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Post by Jordan Gladman » Fri Dec 03, 2010 12:48 pm

^ Not really true, one of the fastest KA's in the world was SOHC.

A boosted motor is like a turbine engine, the combustion chamber facilitates the burn, but the turbo is going to define the force behind the flow through the engine. You can build a SOHC to make 700-800whp on gasoline just like a DE so I dont really see many advantages/disadvantages at the level of power 99% of us operate at.

A DE might make more power at a given boost with a given turbo, but you add a lb or 2 of boost to increase the head flow and you're good. At what point would you bolt on a massive turbo where you'd hit a terminal velocity through the head and having 40+lbs of boost wouldnt increase power?

The limitations are in the block, both blocks built the same will have combustion chamber failure at the same spot, so IMO, boosted they're pretty well the same. Although the SOHC is lower compression can be more resistant to detonation. Its also more simple, lighter and easier to work on. :wink:
Last edited by Jordan Gladman on Fri Dec 03, 2010 12:53 pm, edited 5 times in total.
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Post by fos240 » Fri Dec 03, 2010 12:49 pm

TinyT wrote:of course the de is better. you make power by getting air and fuel into the motor. at a certain point only having 8 valves is going to be a limiting factor.
except for the fact the sohc has 12? :lol:

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Post by tom550 » Fri Dec 03, 2010 1:33 pm

fos240 wrote:
TinyT wrote:of course the de is better. you make power by getting air and fuel into the motor. at a certain point only having 8 valves is going to be a limiting factor.
except for the fact the sohc has 12? :lol:
haha nice to see tiny slip up every now and then.

the DE head flows better obiously. basicly if you ran the same or very similar set up on both the DE should be faster. but like jordan said that doesnt mean you cant turn up the boost a little.

do more reaserch on the parts you want to use and see which way would be cheaper or has better parts. theres not much for the sohc.
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Post by kevin-bullis » Fri Dec 03, 2010 3:14 pm

I'm just going to run a de...more parts available imo.
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Post by TinyT » Fri Dec 03, 2010 3:54 pm

lol. shows what i know. iv only had 1 sohc from a parts car and i threw it away
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Post by tom550 » Fri Dec 03, 2010 3:56 pm

There honestly is. Making more power should be easier.

I love the E but the choice is yours.
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Post by tom550 » Fri Dec 03, 2010 3:57 pm

TinyT wrote:lol. shows what i know. iv only had 1 sohc from a parts car and i threw it away
Exactly why would anyone want to spend over $100 on a sohc :lol:
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Post by Jmcc » Fri Dec 03, 2010 4:45 pm

kevin-bullis wrote:I'm just going to run a de...more parts available imo.
you can't go wrong with ether motor. im building a dohc cause thats what my car came with. but im gunna build a sohc for my next build i have never owned one but i just love them.

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Post by fos240 » Fri Dec 03, 2010 4:57 pm

tom550 wrote:
TinyT wrote:lol. shows what i know. iv only had 1 sohc from a parts car and i threw it away
Exactly why would anyone want to spend over $100 on a sohc :lol:
because there is sheet-ton of sohc shells. and if you want to just get one running without going through the hassel of finding everything for a DE conversion, it's just plain easier to put a sohc back in. don't have to deal with finding a harness, ecu, mafs, power steering resevoir/lines, throttle cable, etc.

as for power, i picked up a sohc from a local guy a few years ago who did an rb swap. i found an extremely rare sohc 5 speed ABS car. the head was removed. so i put that engine in that car. everything on it was bone stock and it was quiker than probably 90% of the na DE's out there. when i got that engine home and cleaned it, i found a factory nissan rebuild sticker on it. it was probably rebuild under warranty. regardless it was strong.

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Post by Jmcc » Fri Dec 03, 2010 5:10 pm

i found a factory nissan rebuild sticker on it. it was probably rebuild under warranty.
they replaced the motor under warranty with a reman.

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Post by kevin-bullis » Fri Dec 03, 2010 6:10 pm

there are more de's in my area so I'll just pick up one of them and rebuild it
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Post by fos240 » Fri Dec 03, 2010 7:17 pm

Jmcc wrote:
i found a factory nissan rebuild sticker on it. it was probably rebuild under warranty.
they replaced the motor under warranty with a reman.
that's what i meant. it was probably sent to nissan under warranty. they rebuilt it and shelved it until it replaced next warranty claim.

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Post by Jackasknissan » Fri Dec 03, 2010 8:22 pm

TinyT wrote:of course the de is better. you make power by getting air and fuel into the motor. at a certain point only having 8 valves is going to be a limiting factor.

no actual data yet.
, but i suspect my sohc head flows more than most built dohc heads :wink:


go with dohc, there is a lot more suppory, and they are inherently a much better design
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Post by TinyT » Fri Dec 03, 2010 8:27 pm

Jackasknissan wrote:
TinyT wrote:of course the de is better. you make power by getting air and fuel into the motor. at a certain point only having 8 valves is going to be a limiting factor.

no actual data yet.
, but i suspect my sohc head flows more than most built dohc heads :wink:


go with dohc, there is a lot more suppory, and they are inherently a much better design
well now that i realize theres 12 damn valves i can see it :lol:

i should have figured, my b12 sentra 1.6 is a 12 valve, now thats a real powerhouse
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Post by kevin-bullis » Fri Dec 03, 2010 8:28 pm

I'm just going to roll de...thanks for all the input guys!
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