# SR20DET on an RX7 FD3S is it possible?
**URL:** https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125
**Category:** Canada Nissan Automotive
**Created:** [August 8, 2007, 8:52am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125 "2007-08-08T08:52:58Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@nopi240](https://forums.speedlife.net/u/nopi240)
#### Post date: [August 8, 2007, 8:52am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/1 "2007-08-08T08:52:58Z")
does anyone know if it is possible to swap the sr20det into the fd?
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### Author:  [@IDRIVEA200SX](https://forums.speedlife.net/u/IDRIVEA200SX)
#### Post date: [August 8, 2007, 9:04am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/2 "2007-08-08T09:04:26Z")
it is, but why? you just need to custom fab the mounts
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### Author:  [@nopi240](https://forums.speedlife.net/u/nopi240)
#### Post date: [August 8, 2007, 9:13am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/3 "2007-08-08T09:13:48Z")
sr20 is more dependable than 13b or 20bs.
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### Author:  [@XuperXero](https://forums.speedlife.net/u/XuperXero)
#### Post date: [August 8, 2007, 12:30pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/4 "2007-08-08T12:30:37Z")
It’s better to swap in LS1, it’s easier and much less fab work according to the guys at [rx7club.com](http://rx7club.com).
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### Author:  [@JDM-IMPORTS](https://forums.speedlife.net/u/JDM-IMPORTS)
#### Post date: [August 8, 2007, 1:23pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/5 "2007-08-08T13:23:43Z")
Booo… LS1 is too heavy… keep the rotary engine… they’re good if they’ve been maintained well; rebuilds are cheap too…
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### Author:  [@RealityZ33](https://forums.speedlife.net/u/RealityZ33)
#### Post date: [August 8, 2007, 3:05pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/6 "2007-08-08T15:05:33Z")
20b 3 rotor from a cosmo, FTMFW!😃
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### Author:  [@blu2fourty](https://forums.speedlife.net/u/blu2fourty)
#### Post date: [August 8, 2007, 11:26pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/7 "2007-08-08T23:26:02Z")
i was thinkin of doing that. rx7s are nice car but rotary motor arent daily material
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### Author:  [@AkumaS13](https://forums.speedlife.net/u/AkumaS13)
#### Post date: [August 9, 2007, 12:32am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/8 "2007-08-09T00:32:37Z")
> [@Stick a fork in it, I'm done](https://forums.speedlife.net/t/stick-a-fork-in-it-im-done/2075/23):
>
> sr20 is more dependable than **13b** or **20b** s.
corrected haha
A b20 if i remember properly is a honda motor lolz, someone correct me if im wrong
its probably possible and as much as id love to see it, i dun think its a good idea. my rx-8 for example is perfectly balanced 50/50. so by putting a SR into it and taking out the rotary i have would completely upset that balance lol
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### Author:  [@XuperXero](https://forums.speedlife.net/u/XuperXero)
#### Post date: [August 9, 2007, 1:46am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/9 "2007-08-09T01:46:18Z")
^20B not B20, google is your friend 🙂
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### Author:  [@AkumaS13](https://forums.speedlife.net/u/AkumaS13)
#### Post date: [August 9, 2007, 1:59am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/10 "2007-08-09T01:59:24Z")
lol google smells like poo, wikipedia pwns all hahaha
Mazda 20B
> **[Mazda Wankel engine](https://en.wikipedia.org/wiki/20B)**
>
> The Mazda Wankel engines (a type of rotary combustion engine, specifically a Wankel engine) comprise a family of car engines produced by Mazda, derived from experiments in the early 1960s by Felix Wankel, a German engineer. Over the years, displacement has been increased and turbocharging has been added. Mazda rotary engines have a reputation for being relatively small and powerful at the expense of poor fuel efficiency. The engines became popular with kit car builders, hot rodders and in light a...
Honda B20
> **[Honda B20A engine](https://en.wikipedia.org/wiki/Honda_B20A_engine)**
>
> The Honda B20A engine series, known as the B20A and B21A was an inline four-cylinder engine family from Honda introduced in 1985 in the second-generation Honda Prelude. Also available in the contemporary third-generation Honda Accord in the Japanese domestic market, along with the Accord-derived Vigor, the B20A was Honda's first line of multivalve DOHC inline four-cylinder engines, focused towards performance and displacing 2.0 to 2.1 litres. The third-generation Prelude was exclusively powered b...
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### Author:  [@nopi240](https://forums.speedlife.net/u/nopi240)
#### Post date: [August 9, 2007, 10:32am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/11 "2007-08-09T10:32:31Z")
LS1 v8 swaps to fd should not compromise the 50/50 balance itl weigh about 2500lbs but you would be able to keep the balance with the right suspension and chassis mods.
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### Author:  [@IDRIVEA200SX](https://forums.speedlife.net/u/IDRIVEA200SX)
#### Post date: [August 9, 2007, 6:52pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/12 "2007-08-09T18:52:34Z")
i’m probably wrong, but i remember reading somewhere that swapping engines does not change balance, it just adds weight… i could be wrong tho (i believe it was a thread about dropping RB26’s into S13’s)
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### Author:  [@Hanzzzzz](https://forums.speedlife.net/u/Hanzzzzz)
#### Post date: [August 9, 2007, 7:29pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/13 "2007-08-09T19:29:06Z")
i dont understand why you would swap an SR into an FD when you could just buy an S14, which is almost the same, maybe a little lighter, it has a back seat, costs less money, and an SR fits right in.
the SR swap is really a lot of work and money, to end up with a potentially slower car?
the V8 swap is popular for a reason. i dont know my domestics too well, but i think its the motor from the late model camaro SS’ (LS1?) that’s all aluminum, the motorset weighs something like, 40 pounds more then a 13B REW, and the power delivery is amazing compared to the rotary.
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### Author:  [@D\_Fresh](https://forums.speedlife.net/u/D_Fresh)
#### Post date: [August 9, 2007, 7:38pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/14 "2007-08-09T19:38:39Z")
Isnt that the point of buying a rx-7? for rotary power?? Why the \*\*\*\* would you ever want to put an sr20 in an rx-7? especialy when they come from the factory with a twin turbo option. With the performance options and aftermarket support it has the rx-7 will always be fast enough without the help of a heavily modifyed sr20
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### Author:  [@AkumaS13](https://forums.speedlife.net/u/AkumaS13)
#### Post date: [August 9, 2007, 7:40pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/15 "2007-08-09T19:40:23Z")
the look is different, theres something about the lines of a FD that makes me want it more than a S14 which i can admit but thats only till i remember theres that god awful rotary in the engine bay lolz
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### Author:  [@Hanzzzzz](https://forums.speedlife.net/u/Hanzzzzz)
#### Post date: [August 9, 2007, 7:57pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/16 "2007-08-09T19:57:49Z")
despite their drawbacks, i think rotors are neat-o! if you wanna do a swap, try an R26B quad rotor.
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### Author:  [@JDM-IMPORTS](https://forums.speedlife.net/u/JDM-IMPORTS)
#### Post date: [August 9, 2007, 8:04pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/17 "2007-08-09T20:04:16Z")
I’ve had the grateful opportunity to drive FD3’s, S14’s, S13’s, R32’s etc…
Each car has their merits; but the scariness of rotary engines is overhyped… they are truly wonderful machines and a vastly different different driving experience… acceleration; sounds, handling… :R “You just need to treat the car like a lady and she’ll do anything to please you… Treat her like a bitch and she’ll be your worst enemy…”
I still love my Nissan’s but I got a soft spot for the FD’s… 😛
If you are going to pound on the car and do minimal maintenance; go to the SR though…
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### Author:  [@flatsil40](https://forums.speedlife.net/u/flatsil40)
#### Post date: [August 10, 2007, 12:12am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/18 "2007-08-10T00:12:24Z")
fd’s on their own, haveeeeeeeeeeeeeeeeeee to be one of my top cars, but if your going to go into custom jazz, throw in a ls1, and i dont know why people say it disrupts the weight ratios, i do belive a sr and a ls1,ka,rb are all withiin weight ratios. i mean yea a sr is probably lighter, i dont know exact numbers but probably like 40-50 lbs ligher, eff it supercharg or up the boost on the ls1 and thoes 40 lbs dont exist!!! whats 40 lbs when the wheels are comming off the ground 🙂
by all means tho, if you want. and it is about what you want. anything can be put into ANY THING. i seen a video of a vw golf a mk 1 with a 32v northstar caddy motor in it with a t7 turbo strapped to it. if that is possible, its only as far as your wallet will go.
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### Author:  [@RealityZ33](https://forums.speedlife.net/u/RealityZ33)
#### Post date: [August 10, 2007, 10:57am UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/19 "2007-08-10T10:57:11Z")
> [@Hanzzzzz"](#):
>
> i dont understand why you would swap an SR into an FD when you could just buy an S14, which is almost the same, maybe a little lighter, it has a back seat, costs less money, and an SR fits right in.
>
> the SR swap is really a lot of work and money, to end up with a potentially slower car?
>
> the V8 swap is popular for a reason. i dont know my domestics too well, but i think its the motor from the late model camaro SS’ (LS1?) that’s all aluminum, the motorset weighs something like, 40 pounds more then a 13B REW, and the power delivery is amazing compared to the rotary.
You are correct, the LS1 is not much heavier then 13b REW.
> [@FS: dsm stuff](https://forums.speedlife.net/t/fs-dsm-stuff/2084/7):
>
> despite their drawbacks, i think rotors are neat-o! if you wanna do a swap, try an R26B quad rotor.
I must agree 100% Rotary engines are marvels of engineering.
It would be almost impossible to find a 4 rotor, I believe they only made a few for there famous LeMans car.
> [@9-6-05 Anderson's](https://forums.speedlife.net/t/9-6-05-andersons/2071/25):
>
> “You just need to treat the car like a lady and she’ll do anything to please you… Treat her like a bitch and she’ll be your worst enemy…”
>
> I still love my Nissan’s but I got a soft spot for the FD’s… 😛
^+100000, I will always have a soft spot for the FDS3… The little engine that could is what comes to mind first.
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### Author:  [@XuperXero](https://forums.speedlife.net/u/XuperXero)
#### Post date: [August 10, 2007, 2:11pm UTC](https://forums.speedlife.net/t/sr20det-on-an-rx7-fd3s-is-it-possible/134125/20 "2007-08-10T14:11:39Z")
Screw FD’s, FC ftmfw! Used to be a dream car when I was younger and sometimes it still is.
You can get a R26B direct from Mazdaspeed, not cheap though. Most people usually go through making a custom 4 rotor IIRC. I’ve seen several setups on [rx7club.com](http://rx7club.com).
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