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Discussion in 'Airheads' started by Infracaninophile, Feb 17, 2009.
Oops, that's what I get for typing before I've finished my morning coffee.
Look guys, before any more of you throw away old Airhead performance and acessory catalogs, please note that I love those things and I'll happily pay your postage expences in exchange for your sending them to me. In fact, for nice copies, I'll throw in some CASH!
Please don't put that stuff in the garbage....!
I'm looking at an 1981 R80 G/S that I know has had a turbo on it. I can trade my R1200C for it. Trouble is, I can't run it cause the headers were tossed when the turbo was installed. The bike is pretty crusty, sitting a long time, probably missing some stuff. Advice ??
Shit yeah get it running & take some video of it. i want to see how one of these goes against a standard bike.
As an aside I know bugger all about turbos however I thought they worked well on exhaust pulses & are good for multicyclinder engines but not so good on singles or twins due to the lower amount of pulses from the engine??? Is this right?
I owned the first kit sold. It was installed free at Irv Seaver to demonstate for socal dealers. I ran it for ten thousand miles with out any engine problem. Infactthat engine is in my best friends R65 and has over 300 000 miles on it. The main problem was the trans, it ate five speeds in 3000 miles. I was on the boost all time. I had three trans done in the time I ran it. All the input drive gear teeth had major stress cracks at the base of every tooth. The fix was to put in a four speed, end of problem. Mine had eight pounds boost other kits where then sold set at six. The thing was FAST. My 81 R100CS had a 80 mph speedo. You could run it up till the needle was on the stop and still stand it on the back wheel. I raced a Suzuki 1100 with a full Yosamira kit in a top speed run, Eddy said his speedo read just over 130 I had more to pass him but when I came out of his draft I got a big tank slapper, the S fairing takes over the fork at that speed. I had to take it off when I lost my license on the third 80 plus speeding ticket. If I only had the bucks get another in a wet second.
Never common, aftermarket turbo kits are like Russian roulette. A steep learning curve.
But, thanks to a few dedicated souls , they're out there.
I got a few rides on a turbo'd '74 900 Kawasaki.It made my eyes water.
This looks to be the same bike in the above pics with a new hue. it's in the Orlando Craigs' List now.
You girls crack me up... BMW had a very good 2V pushrod aircooled engine, produced in LARGE quantities, mit direct injection, seven decades ago.
If you know what you're doing, forced induction is the easiest way to reliably make a lot of power.
If you don't, you break a lot of parts.
BMW had a bunch of supercharged race bikes along the way, so a turbo seems to be in line with BMW's history.
Not only did they make supercharged race bikes, but those bikes were so successful that they caused superchargers to be banned from motorcycle racing to level the playing field. They were getting 60hp out of a 500cc twin before world war 2. Ducati was getting similar output from their 500cc bikes in 1980.
Nice looking package.
Not so much in common with the average Air-Head motor. OHC vs. kinting needles.
So why did they not continue? i've heard the story that they were banned due to them upsetting the non-Germans however if they were so successful why did no-one else continue with them?
IIRC, BMW discontinued thier research into forced induction race bikes because:
1) They'd won just about everything worth winning.
2) Supercharging was banned from the highest levels of interrnational racing and I think that the might have taken that rather personally, as was intended. There were other reasons but I"m of the opinion that that was the biggie.
I'm really happy that BMW is back on the tracks and I'm elated that theyre WINNING!
PS: Don't forget that BMW was for many years the holder of several International Aircraft Altitude and speed Records, going back as far as the first world war. Whenever and wherever the Germans chose to compete, they were usually at the or near top, whether it was Mercedes, Auto Union or BMW.
Here is a page I scanned from my 1980's era Luftmeister catalog showing the basic Turbo package.
Here is another page (if anyone even cares) showing some of the additional turbo system components. It's my understanding that the basic Turbo system cost about $4000 back in the day. Add to that the cost of the bike itself(about 3800 for a 1983 RS - the most expensive general production streetbike on the market at that time, according to an old Cycle magazine article from 1984 and you are looking at some serious cash being spent --in some cases so that the airhead guys could impress their K 100 Bike buddies. (
RoughReady, I care and I thank you for the scans. I bought a Luftmeister kit a few months ago and it's going on my R60/5 this winter. I'm having the turbo gone through now (although it may be replaced with a T20 since RH05 parts are apparently impossible to find).
So, it looks like at least for some of you that buying a bike that has had a turbo would be no problem ?
Here's a page from the catalog showing the Krausers', etc.
It was not a problem for me when I bought the 83 R100RS Turbo primarily because I came across it more or less by accident and got it for a very good price. I needed a turbo bike like I needed a hole in my head. After spending some time and effort to get it running (it sat for 5 years) I drove it around the block a few times (low speed - rear valve stem leaking air, not registered, insured, etc) and parked it in a corner of the garage where it still sits. Here's a pic I posted somewhere else on ADV 4 years ago when I got it.
A turbo could work well for sure, however twin cylinder engines don't respond as well as multi cylinder bikes (more lag)
These are pretty crude kits (as in old design) At least it has water injection, bit it really should be blowing through twin carbs, and have an intercooler. Seeing as how Airheads are detonation prone already, I would add a water/alcohol injection as well.