Other Engine Conversions - non V-8 Discussion of non-rotary engines, exc V-8's, in a car originally powered by a Rotary Engine.

got a free KA24de

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Old Aug 27, 2007 | 02:48 AM
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got a free KA24de

like the title says, i got a free Ka24 and have had a 2nd gen rx7 sitting in my garage for about a year now that i bought with no engine. do any of yall have any info on anyone successfully completing this swap. ive test fitted the motor and it fits and will have to have motor and tranny mounts fabbed but im having oil pan clearance issues because of the front sump on the KA. just wondering if anyone had any info before i attempted to cut the oil pan up and remake the oil pickup. thanks
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Old Aug 27, 2007 | 10:41 AM
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yeah, send it my way
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Old Aug 27, 2007 | 01:58 PM
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it will probably be more cost efficient to put a stock engine in and sell the KA. the custom swap will add a lot of cost and not net you any power gain over the stock engine.
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Old Aug 28, 2007 | 01:15 PM
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i dont think its possible, i have heard of people trying it though...

...stupid swap either way you look at it.
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Old Aug 28, 2007 | 02:29 PM
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Originally Posted by driftking777
i dont think its possible, i have heard of people trying it though...

...stupid swap either way you look at it.
ha. good one.

its not that its a dumb swap or a bad engine, i just dont think its worth the money and custom work especially if it will be kept n/a.
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Old Aug 28, 2007 | 03:15 PM
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I agree. What advantage do you see with the KA over the rotary?
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Old Aug 28, 2007 | 11:39 PM
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^^^^ your right less torque is better, then you dont have to worry about wheel spin!!!!! trap speeds always are better
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Old Aug 29, 2007 | 08:35 AM
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the KA will be a future KA-T....and ive weighed the issues of it being worth it. i also have access to a machine shop so i wont be out hardly any money for the pieces i have to fabricate.
i dont understand all the hate towards the KA24de...im on my 6th 240sx now and the ka has always made a good reliable engine for me, true it wont generate a bit of smoke while drifting if N/A but will make decent power when a turbo is added...i REALLY just needed technical assistance regarding any details of an install like this if it exists...even if its regarding an SR20det since the mounting hardware would work for my app.
i really dont need to get beat down about what a stupid swap it would be...i know the swap would not be anything spectacular but my budget is super tight right now.
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Old Aug 29, 2007 | 08:45 AM
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...and i dont want to get wankled in here but i have a very good condition dohc KA and if i were to buy a used rotory(around $750) i would def. have to rebuild it(?$?) and from what ive heard i would have to do it again after about 60k miles....dont get me wrong, i love the sound, power per liter, and the weight of a rotory. i just think i would be spending more money putting another n/a rotory in... but i am by no means a rotory expert, im a rotory newb so if i have this wrong someone set me straight.
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Old Aug 29, 2007 | 10:43 AM
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FYI, to put this into a FB/SA all you really have to do is swap the rx7 subframe for the 240 subframe. dont believe me? ask rotors vs pistons, he did it.
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Old Aug 29, 2007 | 03:16 PM
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Originally Posted by bluspd
the KA will be a future KA-T....and ive weighed the issues of it being worth it. i also have access to a machine shop so i wont be out hardly any money for the pieces i have to fabricate.
i dont understand all the hate towards the KA24de...im on my 6th 240sx now and the ka has always made a good reliable engine for me, true it wont generate a bit of smoke while drifting if N/A but will make decent power when a turbo is added...i REALLY just needed technical assistance regarding any details of an install like this if it exists...even if its regarding an SR20det since the mounting hardware would work for my app.
i really dont need to get beat down about what a stupid swap it would be...i know the swap would not be anything spectacular but my budget is super tight right now.
I don't dislike the KA at all. I think it's cool. I just am wondering, for the power you are targeting, wouldn't it be easier and cheaper to just put a rotary back in it and sell the KA? Unless you are going for something different, which you can't put a price tag on.
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Old Aug 29, 2007 | 03:17 PM
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Originally Posted by bluspd
...and i dont want to get wankled in here but i have a very good condition dohc KA and if i were to buy a used rotory(around $750) i would def. have to rebuild it(?$?) and from what ive heard i would have to do it again after about 60k miles....dont get me wrong, i love the sound, power per liter, and the weight of a rotory. i just think i would be spending more money putting another n/a rotory in... but i am by no means a rotory expert, im a rotory newb so if i have this wrong someone set me straight.
Whoever told you rebuild at 60k is wrong, when regarding a stock engine (turbo, NA, whatever). If you are talking 400+ whp, this is something different.
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Old Aug 29, 2007 | 03:58 PM
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wow this does seem like its been done before



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Old Aug 30, 2007 | 09:26 AM
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put it in guy. even with stock internals KA-T can make some good power and fairly amazing torque. reliability.... much better a 13bt
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Old Aug 30, 2007 | 12:44 PM
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Originally Posted by aws140
FYI, to put this into a FB/SA all you really have to do is swap the rx7 subframe for the 240 subframe. dont believe me? ask rotors vs pistons, he did it.
reeaaallly....do u know if this would work on an fc by chance that would be sweet...i just wish i hadent had all those junk 240 chassis hauled off.lol
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Old Aug 30, 2007 | 01:45 PM
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i dont know. just pick yourself up a SA/FB

IIRC, the FC and FB subframes as close in size. due to people swapping FC subframes into FB. if the R&P is connected to the subframe though, then youll have some problems.
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Old Aug 30, 2007 | 02:40 PM
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Originally Posted by aws140
i dont know. just pick yourself up a SA/FB

IIRC, the FC and FB subframes as close in size. due to people swapping FC subframes into FB. if the R&P is connected to the subframe though, then youll have some problems.
does the fb have the 1 piece lower control arm with tension rods like the 240? not sure im gonna want to swap the sub frames due to the fc subframe being a some what superior design...i just never have liked the tension rod design lower control arm of the 240...i did looked under my s13 240 and then under my fc and the sub frames are similar in size but different designs and like u mentioned, the R&P is in a different location.

so far it looks like im gonna delete my heater in order to set the engine back more and cut the front of the oil pan sump to clear the fc r&p...maybe
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Old Aug 30, 2007 | 03:01 PM
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Originally Posted by shm21284
I don't dislike the KA at all. I think it's cool. I just am wondering, for the power you are targeting, wouldn't it be easier and cheaper to just put a rotary back in it and sell the KA? Unless you are going for something different, which you can't put a price tag on.
...it might cost me about the same or more and it would definately not be easier for a rotory newb like me because i dont believe in putting in a used motor if its not rebuilt. i also dont know anyone in my area that knows how to build a high hp rotory...on the other hand ive been messing w/nissans for a long time and know the motors inside and out.
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