NOS'd XS?

[MAXIMAN]

When I bought my '79 from Ron Ramsden in Chicago he included a bunch of old magazine reviews of the XS11...original brochures and letters he'd written to various companies inquiring about performance specs and modifications.

here's one he wrote to H.P. International about a NOS system they were putting on bikes in the late 70's and early 80's Get a load of this old letter and the results they got from a NOS'd Eleven Bagger!
[IMG][/IMG]



What was even more intriguing to me was what they said about the "almighty" CBX and how it didn't have the "guts" to handle a NOS setup with out serious mods to the engine. That should be a huge indicator of just how "overbuilt" the old Eleven really was. Besides...do you realize how much juice that Eleven bagger had to be making to turn a high 10 E.T.? The computer says 125 to 130 at the rear wheel! Now consider this...that Eleven must have been ginning up 150+ at the crank.

PS: Ron is a good friend of Craig Vetter. Here's a shot of him with Craig and brother forming a windshield with body weight.
Ron and Craig Vetter

Small world huh?

[mason79]

heck yah!

[Stralya]

XSive?

I thought NOS might be a bit over the top on our bikes given how much mid range/top end grunt they have until I saw small block V8 Boss Hoss with a dirty great NOS bottle hanging off it. Now that's overkill.

Hey, what about a NOS line straight up the nostril? You'd be laughing all the way!

Dan
Turn your head and cough.

[trbig]

I've talked about this before, but got no answer. Could a person not use 78-81 cylinders that don't have the YICS tube on them, use an XJ head that DOES have the YICS ports in it and drill and tap for a nitrous hookup? These port holes are exposed with this setup and lead directly into the head right in front of the intake valve.





I don't know a lot about nitrous to know if this would work, but it seems possible to me. There would be virtually no modifications needing done to the head that way.

OR... could you just plug it nto the intake boots where you hook up the carb synch tool? Just curious as to how this would be done. A nice little 50hp shot of nitrous could be a lot of fun! Seems I'm always replacing engines anyway... might as well have fun right? lol


Tod

[petejw]

I found this link about putting
nitro on a bike u mite find it interesting,
fairly cheap mod for the output gain.

http://www.diy-nitrous.fsnet.co.uk/index.htm

[MAXIMAN]

NOS is interesting but something I'd never do. It's a poor man's way to get power.

NOS is not sustainable power so it's good for only short shots...like the strip or a street fight I suppose to prove a point.

On an Eleven a lot of trick stuff can be done to get one to 150 at the wheel. But probably the easiest way to get sustainable power is simply turbo the thing. But don't expect it to hold up for l100K or even 30K. Elevens are tuff...REAL TUFF...but they "ain't" that tuff.

Apparently those CBX would shank the rods on the first few runs with NOSboo friggin hoo...Proving what many have said around here for years. They were overated.

[trbig]

Considering I'm on my 3rd or 4th engine in 14,000 miles... NOS couldn't reduce my usage too much more! lol.

Of course being too cheap to do one RIGHT (Like not piecing together used motors) may have something to do with that!


Tod

[MAXIMAN]

Riiiiight Scott...(my best Dr. Eevil imitation)

Yes being too cheap to build it right definitely has alot to do with it. A properly built Eleven engine will go far beyond 14,000 miles.

But then I have a feeling the way you ride it has "some" bearing on engine longevity. It helps a lot if you aren't trying to choke 120 hp out of 95 hp motor.

[trbig]

"It helps a lot if you aren't trying to choke 120 hp out of 95 hp motor"

Just for clarification.. it's an "Enrichener" hold... not a "Choke" hold!

95 hp huh?? Ya think so?? I'll take that guestimate! Not too bad for three different motors slapped together to make one!


Tod

[mitch]

horse power

A stock xs11 puts out about 75 HP. Scroll down this if you dont believe me
http://www.xs11.com/specifications/e-spec1.shtml
Doug

[trbig]

A stock xs11 puts out about 75 HP

That's what is getting to the WHEEL. The stock 78 was rated at a little under 100hp.


Tod

[MAXIMAN]

Re: horse power

Originally posted by mitch
A stock xs11 puts out about 75 HP. Scroll down this if you dont believe me
http://www.xs11.com/specifications/e-spec1.shtml
Doug

Huh? Are you telling us something we don't already know?

Of course a stock XS11 makes about 75 hp....at the rear wheel. It makes 95 at the crank as per the factory. But by the time is spins up through the transmission...middle drive and final drive we lose about 16%....to arrive at about 75 to 80 at the rear wheel.

Here's some real proof...evidence I gathered just a few weeks ago on my bone stock '79F. It made 80 hp at the rear wheel.

[mitch]

Power

Nice numbers for a stock bike and imagine that old girl is almost 30. Didnt mean any disrespect just stating a fact, i editted my post to say to the rear wheel but i must of made a mistake as it didnt change sorry. I buried a few bikes with my old XJ so i know what the 1100 will do. hagn
Doug

[chopwatchagot]

Last spring I had access to one of the Dyno's at MMI in Phoenix so I wheeled my 80 standard in there for a run. It wasn't running bad but not really all that great either. I was more interested in tuning/jetting than what the horsepower numbers were. It pulled 82 hp at the rear wheel. Not bad considering that when I did a leakdown test I was loosing 40% of the pressure! It was leaking at the head gasket, nearly all of the valves and the rings. It still went 125 mph. Now it's down for a top end rebuild but I have a feeling I'm really going to like it when I'm done. Don't think I'll really need NoS. Hey, it's not going to beat the litre bike crotch rockets even with nitrous and it'll trash all the Harleys without it so what's the point.

[MAXIMAN]

Mitch - not a problem. It pretty much common knowledge the XS makes about 75 to 80 at the rear wheel.

Originally posted by chopwatchagot
Don't think I'll really need NoS. Hey, it's not going to beat the litre bike crotch rockets even with nitrous and it'll trash all the Harleys without it so what's the point.

Excellent point. Of course the reason I pumped Zilla up was for torque and heavy duty touring. And the reason for this post was to show how stout the Eleven is built compared to it's peers of the day namely the CBX.