Gentlemen: May I present to you....

[BMWRider]

Let the haters hate! lol.

The R1100s was never about burning up a blackbird or busa at the track. Someone is always faster and someone always has an extra inch on your cock...

Personally I think it's cool he did it. Find a safe tune and enjoy!

[roger albert]

Ooops, apologies to RBMann, I obviously meant Motoman.
And to be clear, again, I think the project is damn cool.
Always nice when someone does a cool project instead of just talking about it.

[JonyRR]

At 5 or 6 grand it was still cheap as fabricatation is one thing and tuning it to run and not scatter entirely another.

I'm frankly envious as I always wanted my R1100S to leap forward like my CX650 Turbo did when brake-boosting

[motoman]

Originally Posted by roger albert

Ooops, apologies to RBMann, I obviously meant Motoman.

When Motoman meets RB racing, the result is obviously, RBMann!

I love my R1100S, the old girl still has good looks after all these years!

However, it's been a long time, almost like the movie Castaway when Tom Hanks comes home after about the same amount of time! if someone here really wanted to own a unique bike, I am willing to consider reasonable offers. 16K miles, original owner.

[steve abella]

Amen Sergio you are 100% correct
Now how about a ride report with a stock r 1100

Originally Posted by SergioK

Motoman... very impressive. And, congratulations on getting your bike back. Looks neat!

Now, for the rest of the PP members, I'm just shocked with all of you. I mean, the guy must have been salivating after getting it back and the first thing he does is post it on here and what do you guys do... everyone starts asking about this and that... What the HECK is wrong with everyone here?!?! Absolutely no one, and I mean no one has even asked what tires or type of oil he's running. Sheesh!

[ErricZ]

sweet wild ride!

[RIQUE]

Awsome work Motoman, you sure show the love for your ride. An example to all.

Intersting that you put a turbo on your bike. I just bought a turbo bike but its a Honda CX500TC. Smaller engine only 500cc but with turbo boots it gets 85HP at 4K. Pretty respectable for a 2V moto guzzi type engine. .... I'll race ya

[JonyRR]

Having owned both a CX500TC and CX650TC (TC means TURBO) I can say the 500 is probably as fast and quick as a stock R110S.
I'd love to race a CX650TC with my R1100 but predict I'd get smoked in a straight line.

[motoman]

Greetings Gentlemen!

(I feel like a real Dinosaur around here...

Some updates for you: I found an extremely competent mechanic near me and did some modifications to the bike.
The water injection was removed (completely unnecessary).
The original Garrett Turbo was rebuilt and water-cooled instead of oil cooled, using a small heater core and water pump mounted to the rear of the bike.
Wastegate spring was replaced and reduced to 7 lbs.
Fuel management replaced with a Techlusion unit which works surprisingly well. Adjustable pressure valve replaced with much more robust unit.

All of this was done to make the bike a much more reasonable and reliable unit and not something that was aspiring to race at Bonneville.

And of course, in retrospect, the entire project is pointless because of all the wonderful bikes you can go out and buy today which are close to 200 hp in stock form, including the S1000RR.
But that's in the Land of Hindsight, where everyone is a genius.

Cheers!

[wswartzwel]

Thanks for dropping by!

[Deans BMW]

I remember that back in '77 we built a Turbo R100S. Bike was a lot of fun, I remember that it would pull like crazy in the top two gears racing other bikes up on Sky Line heading towards Alice's. Had a lot of exhaust valve seat problems, I seem to remember. I do remember that you could outrun the brakes because it would go so fast playing Go-Fast up on Skyline. The speeds that you would hit coming up to a corner were so much higher than a stock R100S.

I have some pics of it somewhere, will post if found.

[Tirefriar]

Originally Posted by motoman

...

And of course, in retrospect, the entire project is pointless because of all the wonderful bikes you can go out and buy today which are close to 200 hp in stock form, including the S1000RR.
But that's in the Land of Hindsight, where everyone is a genius.

Cheers!

I disagree with you MM. It maybe pointless if the only purpose here was to build a fastest sport bike. However, this project merges the R11S with engineering technology that looks just way cooler than what you will find on the run of the mill bikes of today. The objective here should be identified as building the fastest R11S.

I came close on several occasions to selling my BCR, but luckily for me I've not followed through. My bike is mostly stock, with several reversible mods. Although I'm not a hardline purist, I do tend to lean towards stock rather than heavily modified. With the prices of R11S, including BCR, are somewhere around their ankles this would be a very cool mod to pursue. I'm sure one day the public will wake up to BCR's and clean low mileage R11S but that's in a time far away from today. In the meantime, life goes on and I certainly won't need this mod 20 years from now. Having said that I wouldn't mind having one of the fastest R11S around and this would be the way to scratch that itch.

[motoman]

Originally Posted by Tirefriar

Having said that I wouldn't mind having one of the fastest R11S around and this would be the way to scratch that itch.

Sounds good, Tirefriar... BTW, I happen to have a bike I would like to sell to you!

[bmw2cv_fritz]

Originally Posted by motoman

Greetings Gentlemen!

(I feel like a real Dinosaur around here...

Some updates for you: I found an extremely competent mechanic near me and did some modifications to the bike.
The water injection was removed (completely unnecessary).
The original Garrett Turbo was rebuilt and water-cooled instead of oil cooled, using a small heater core and water pump mounted to the rear of the bike.
Wastegate spring was replaced and reduced to 7 lbs.
Fuel management replaced with a Techlusion unit which works surprisingly well. Adjustable pressure valve replaced with much more robust unit.

All of this was done to make the bike a much more reasonable and reliable unit and not something that was aspiring to race at Bonneville.

And of course, in retrospect, the entire project is pointless because of all the wonderful bikes you can go out and buy today which are close to 200 hp in stock form, including the S1000RR.
But that's in the Land of Hindsight, where everyone is a genius.

Cheers!

This has been cracking to read! And most informative in conjunction with the RB page, good work for putting up with you bike away from you for FIVE years...!!! Actual hero.

A couple of questions that I'd love to hear more about;

- Do you have a diagram or details of the original oil cooling layout? Was the return from the turbo tapped into the sump?

- Why did you go for water-cooling of the turbo instead of the original oil feed?

- Has this a separate ECU controlling timing (to stop pre detonation?) or was it the BMW system with the Techlusion just added on for fuel?

- What size/model of Garrett is it?

I'm very interested in this as I'd like to do something very similar and it'd be most helpful to have a baseline of what has been done already!

You Sir are a pioneer.

[darkonaut]

an excellent thread to keep alive

[Deans BMW]

I had a '77 R100S that we built in .......1977....

It was a lot of fun playing Go-Fast up on Skyline and down Hwy 1 back then on the beast. The first bike that I ever had that would out run its brakes. A new learning curve that had to be quickly mastered as it got to the next corner so damn fast. The only problem that I remember having was that it was very hard on exhaust valve seats.

[motoman]

Originally Posted by bmw2cv_fritz

This has been cracking to read!

I'm very interested in this as I'd like to do something very similar and it'd be most helpful to have a baseline of what has been done already!

You Sir are a pioneer.

Thank you for your kind words, Sir.

All I can say is: Don't. And stay far, far, away from RB Racing. Being a Pioneer is expensive. If you want wretched excess, go buy a Kawasaki Ninja H2. Or H2R if you can afford it.

There was a recent eBay listing of a Turbo R11S from a shop in the UK. Blue/White/Black. Done much better than mine.

Here is a Link- Anyone seen it? Looks good to me! I'd buy it if I lived in the UK...

https://www.colwynbaymotorcycles.com/used-bikes/bmw-r1100s/#carousel

The bike is running but rarely ridden. If you are interested in a true Pioneer bike, I will entertain serious offers.

[bmw2cv_fritz]

Dropped you a pm MM. Thanks!

[milnersXcoupe]

Looking at the Rotrex c-15-60 for a build ..

Recommendation for best Smart ECM upgrade - an ABS R1150r ?

What of Exhaust Valves that will survive Boost & 9k ?