Turbocharged XS1100!

[Tusler]

Here it is a turbo charged XS1100-
http://www.cycletrader.com/find/list...-1100-95118738

[mstic2000]

I wonder if the performance gain is worth the $$$ for those kits. Seems kind of steep 30%-40% for 2K.

XS1100 Turbocharged

[CatatonicBug]

Wow! Except for the seat, that is one NICE midnight! Dunno about the whole turbo thing, but the choice of pipes and the condition of the rest of the bike really makes that thing shine!

[BigDick]

I wonder if the performance gain is worth the $$$ for those kits. Seems kind of steep 30%-40% for 2K.

XS1100 Turbocharged

How bad does it hurt that 11 blasting that through the redline like that?! He's maxing out the tach every time he hits the throttle. Can't be good.

[Ken Talbot]

It was idling somewhere above 2000 rpm, according to the tach, but it didn't sound like 2000 rpm to me. When he blipped it, the tach needle flipped around, but I didn't think that really sounded like full revs either. I've heard my engine rev up close to redline, and it sounded way different. I would guess the tach is off by a factor of two somehow.

[BigDick]

just watched it again, yeah gotta agree with you ken but by jimbo that scares me just watching that needle jump that high lol

[mstic2000]

I would guess the tach is off by a factor of two somehow.

Yes, the way the needle jumps around at idle plus it redlining so easily makes me think the tach must be off somehow. I wonder if it has something to do with the kit? The puffs of smoke at the beginning didn't look too healthy either.

[trbig]

Yeah... because revving the piss out of it right when you start it is in ALL the manuals.

That seart looks big enough to sleep 4 comfortably.. yet he can't even haul a passenger unless they want to let their legs dangle.

I have to agree with Ken.. It does seem like he's revving it to about 5-6k at the most.

Tod

[mstic2000]

That seat looks big enough to sleep 4 comfortably..

Must be the "overnighter deluxe" model seat...

[Cobia]

Notice the slotted "and drilled" rotors? And how about that exhaust routed to the left side instead of the right? $$$$$$

[Jerry]

There is an article floating around somewhere on the turbo Yamaha, they were sold in Europe and every now and then a turbo comes up on ebay.

From factory, the turbo was adjusted to keep inlet pressure around sea level pressure, not an overboost. The wastegate was designed to open above that point. idea was to keep a consistent inlet pressure over a range of operating conditions and elevations.

Now it is possible to re-spring or shim the wastegate spring to get higher boost pressures. However, this is ususaly done for only a couple pounds of boost...puts a lot of extra strain on engine components. Another factor is the boost on a turbo, which is powered by exhaust gasses, does not kick in until higher RPMs; the low end grunt is generally lower than a normally aspirated engine, up to the mid 3K range typically. There was a "turbo lag" effect on early turbo installations due to the time it took for the extra exhaust to 'spin up' the turbo.

Having said that, and having owned 2 turbo cars, a turbo can be a lot of fun to drive. Nothing like the kick when the turbo comes alive, and listening to the turbo sing as it revs up and down the RPM scale is a real hoot. I've often though about trying to find one of the turbo SECAs Yamaha put out in the early '80s, think it would be fun to own one.

The 2 turbo cars were a '65 turbo Corvair (180hp) and an '82 Audi 5000 Commemorative Series Turbo. (5KCST) The Audi turbo, in particular, was fun to drive hard.

Anyway, back to the XS11...the turbo version was dropped in favor of the 'new' FJ powerplant for the US market. A shame, the 11 engine was no where near the end of its development cycle and a turbo version would have made a great cruiser engine as well as a sport bike powerplant. However, at the same time, Yamaha was out to capture the touring market with the Voyager vs the Gold Wing, and the FJ's newer frame and engine was to cover the crotch-rocket segment. No real place for the XS11 engine in that line up, so Yamaha dropped it. Guess we shouyld be glad the engine was in production for 7 model years, '78 - '82, and through '84 in some markets. Not a bad run at all.

[dbeardslee]

Justjeff built one with a turbo and a wicked ghosted paintjob. IIRC he claimed 200 ponies with that little mod.

[Bamper]

quick question is it true that a turbo will help mpg, by helping atomize the fuel befor it enters the combustion chamber?

[b.walker5]

There is an article floating around somewhere on the turbo Yamaha, they were sold in Europe and every now and then a turbo comes up on ebay.

Is this it?
http://www.turbomotorcycles.org/TMIO...lp_Yamaha.html

[Ivan]

How do they provide fuel to a turbocharged engine from the early 80s. I didn't see any EFI stuff on that midnight. I am guessing pressure carbs, but I didn't see any carbs. I was always told that running fuel air mix through a turbo is bad since it tends to pre ignite and also dilutes the oil on the bearing.

I am confused...