BMW Airhead "Kompressor" Reborn

R100RT
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BMW Airhead "Kompressor" Reborn

Postby R100RT » Wed Jul 29, 2009 4:57 pm

Not to many BMW motobikes appear on these pages, however these older bikes are a natural candidate for charging, having very strong, opposed bottom end support (boxer design) plus Nikasil liners on mid to newer models, etc. etc.

Descriptive details of project would be:
-1984 R100RT starting point (fully faired, air cooled 980cc opposed twin, 2 valve heads, original BMW technology on a touring bike)
-Mitsubishi European "Forto" 3 cylinder 988cc gas engine turbo - mounts in front with "Y" collector not all that different looking at first from stock BMW pipes.
-Saab 900 intercooler cut by half, mounts at lower front point, just in front of oil pan bevel front zone.
-Throttle body and collector reservoir housing (dampens pulsations prone to short intake runs on 2 cylinder bikes and such) from donor Honda CTX650 turbo bike
-42lb Delphi injectors, @ 43psi squirt at close right angles to throttle plates.
-Bosch fuel pump in its own housing, I had previously fit a 60amp Mitsubishi Alternator.
-Turbo oil feed through orificing, as well cooling of cartridge housing on way, coming from oil cooler that feeds off modified BMW filter housing.
-Inovate Wide Band O2 sensor and cockpit gauge - very nice product for on the road tuning
-Twin feed and return fittings made to thread directly onto my stock, unchanged fuel tank.

I would say adding all this to a fully faired bike like mine presented steeper challenges than I might have anticipated. You can't just hack and fit things, they have to jive with the program already underway.
Thanks offered to DIYAutotune, excellent backup and support.
Lorne
Last edited by R100RT on Fri Feb 03, 2017 12:40 pm, edited 3 times in total.

R100RT
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Re: BMW Airhead "Kompressor" Reborn

Postby R100RT » Sat Aug 29, 2009 4:39 pm

Kind of light on trips yet but initial running seems to indicate much improved fuel economy, I suspect injector orientation to throttle plates has succeeded.
Photo attached.
DSC00612.JPG
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Sluggy
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Re: BMW Airhead "Kompressor" Reborn

Postby Sluggy » Fri Sep 11, 2009 8:42 am

Beautiful job! I'd love to see more detail pictures...

Sluggy!

R100RT
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Postby R100RT » Wed Sep 16, 2009 7:44 pm

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R100RT
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Re: BMW Airhead "Kompressor" Reborn

Postby R100RT » Wed Oct 28, 2009 7:19 pm

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R100RT
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Re: BMW Airhead "Kompressor"

Postby R100RT » Fri Mar 05, 2010 4:01 pm

Upgrades complete, will post a few photos this weekend.
Last edited by R100RT on Wed Aug 15, 2012 5:18 am, edited 1 time in total.

R100RT
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Re: BMW Airhead "Kompressor"

Postby R100RT » Sun Mar 07, 2010 10:52 am

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R100RT
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Re: BMW Airhead "Kompressor"

Postby R100RT » Sun Mar 07, 2010 11:01 am

Right side, Edis & F.I.

DSC00936.JPG


Left side depicting intake plumbing post aftercooler, as well air box & throttle assembly. Fuel reg. above, map sensor below. The fuel tank is removed at this point, its plumbing hanging to side.

DSC00937.JPG
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R100RT
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Re: BMW Airhead "Kompressor"

Postby R100RT » Sun Mar 07, 2010 11:05 am

Left side electrical terminal station, resides behind removed cover.

DSC00938.JPG


Micro Squirt, Relays board, & Fuse board - all tucked within a compartment at rear top side, hides underneath seat.

DSC00939.JPG
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R100RT
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Re: BMW Airhead "Kompressor"

Postby R100RT » Sun Mar 07, 2010 11:10 am

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