Rotary Engine Swap 20B - Mercedes Benz SLK Forum

Performance MODS for the R171 Tuning and Performance modifications for your SLK

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#1 Old 01-24-2018
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Rotary Engine Swap 20B

Hey Guys,

I know this sounds silly but after seeing a few clips of some RX-7’s shredding their tyres I was wondering if it was possible to swap in either a 20b or 26B rotary engine into my 2008 Mercedes-Benz SLK200 Kompressor.

Not sure if it’s been done before or if it’s even possible, just spitballing some crazy ideas
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#2 Old 01-24-2018
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#3 Old 01-24-2018
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Quote:
Originally Posted by Aaron Beven View Post
Hey Guys,

I know this sounds silly but after seeing a few clips of some RX-7’s shredding their tyres I was wondering if it was possible to swap in either a 20b or 26B rotary engine into my 2008 Mercedes-Benz SLK200 Kompressor.

Not sure if it’s been done before or if it’s even possible, just spitballing some crazy ideas
1 why ?
2 they burn oil !
3 are thirsty engines !
4 your car will be worth .50p afterwards
5 just mod your existing engine be a lot easier and simpler .
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#4 Old 01-24-2018
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My best advice when it comes to ambitious swaps: Do them first, THEN post about them. otherwise you'll get all the advice you DON'T want.

I think the SLK is a bit heavy for a little engine like that, so you better put some turbos on it... or do one of those 4-rotor setups.
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#5 Old 01-24-2018
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Have an adventure! do the swap, less ambitious would be to drop in the 4.3 or 5.5 L V8
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#6 Old 01-24-2018
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Anything is possible with enough money! It probably isn't the easiest route to go, but the R171 isn't that hard to do swaps on. Rotary's are really finicky engines, but they do scream. You could always swap in a Holden LS3 engine for a good time. RB26 or 2JZ would be a hoot too.
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#7 Old 01-25-2018
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My brother has a rx-8, ported engine, no cat's, straight pipe and remap. Still not happy with the performance.
Fitting a rotary engine will leave you some space to work around.
Why don't you buy a rx-7 or rx-8 and put some turbos on it, will be cheaper.
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#8 Old 01-25-2018
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If you want to go non-Merc for a power plant, why not a 1300 Hyabusa? Not too hard to get 500bhp out of one of these and a lovely compact unit.
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#9 Old 01-25-2018
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Originally Posted by neileg View Post
If you want to go non-Merc for a power plant, why not a 1300 Hyabusa? Not too hard to get 500bhp out of one of these and a lovely compact unit.
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"Not too hard"
1-25-2018 3-55-00 PM.jpg
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#10 Old 01-25-2018
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Quote:
Originally Posted by Turdo2 View Post
"Not too hard"

Attachment 476105


Nah, that’s on it’s way to 1,000 horsies

Be fun though. You might get a few hours running time until the rebuild is due



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#11 Old 01-25-2018
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Quote:
Originally Posted by neileg View Post
If you want to go non-Merc for a power plant, why not a 1300 Hyabusa? Not too hard to get 500bhp out of one of these and a lovely compact unit.
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Because the Hyabusa doesn't produce enough torque to propel a one and a half tonne car - Horsepower isn't the be all and end all
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#12 Old 01-25-2018
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Sheesh, never thought of that....
I’ll try and be more practical in future.
Thanks for the heads up


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#13 Old 01-25-2018
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Think the hard part about a 26B (4 rotor, 400 lb-ft torque) would be finding one or do you have a source ?

Suspect 6mpg might get a bit pricy though.

If you really want 9,000 rpm though I know of a mint early Honda S-2000...


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#14 Old 01-25-2018
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Originally Posted by neileg View Post
Sheesh, never thought of that....
I’ll try and be more practical in future.
Thanks for the heads up


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Practicality is frowned upon!

I would be kicked out of this forum in seconds!
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#15 Old 01-26-2018
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Please....... don't.
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