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BMW Airhead "Kompressor" Reborn

Posted: Wed Jul 29, 2009 4:57 pm
by R100RT
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

Re: BMW Airhead "Kompressor" Reborn

Posted: Sat Aug 29, 2009 4:39 pm
by R100RT
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

Re: BMW Airhead "Kompressor" Reborn

Posted: Fri Sep 11, 2009 8:42 am
by Sluggy
Beautiful job! I'd love to see more detail pictures...

Sluggy!

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Posted: Wed Sep 16, 2009 7:44 pm
by R100RT
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Re: BMW Airhead "Kompressor" Reborn

Posted: Wed Oct 28, 2009 7:19 pm
by R100RT
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Re: BMW Airhead "Kompressor"

Posted: Fri Mar 05, 2010 4:01 pm
by R100RT
Upgrades complete, will post a few photos this weekend.

Re: BMW Airhead "Kompressor"

Posted: Sun Mar 07, 2010 10:52 am
by R100RT
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Re: BMW Airhead "Kompressor"

Posted: Sun Mar 07, 2010 11:01 am
by R100RT
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

Re: BMW Airhead "Kompressor"

Posted: Sun Mar 07, 2010 11:05 am
by R100RT
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

Re: BMW Airhead "Kompressor"

Posted: Sun Mar 07, 2010 11:10 am
by R100RT
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