Cut away view of what I thought was a Sting pipe, but not sure because it does not seem to have enough bend to fit the strait manifold, I think it goes with the slightly angled manifold. I am thinking the Sting pipe is the same, I wish I had one to cut open.
Click on the pic to make it big, and then click again for bigger yet, and you can see these are quite the heavily engineered baffled up Scorpion tuner pipes.
Here is a six bolt shoe horned into an old Massey, Charlie moded the F pipe to fit ( Stock Appearing) I am guessing this little mod de - tuned the crap out of that nice little motor. He really did not have much choice though with the forward mount engine etc.
Last Edit: Dec 13, 2014 18:25:49 GMT -5 by weverat
Then first pic is the exhaust as used on the 4 bolt ice racer, a bit of a cheater, but I had to get rid of that nasty restrictive F pipe. This made a difference, and really seamed to wake up the motor.
The nicely painted black manifold I believe is from a Sting ? The one with the 90 degree bend is 1976 Whip.
Wow, tough one, the tuner pipes are definetly a black art, I just plug and play, hope, and adjust.
Lots of adjustments available if you don,t mind cutting and welding. Header, mid section, and stinger length is all I have tried. Of course it really is about testing, one adjustment, test again. Sometimes it is darn hard to figure if things are getting better or worse, a dyno would help.
The Donaldsons make good power. I have two exhaust set ups for the Stinger II ice dragger (4 bolt). The first set up is a Y manifold from a 6 bolt motor, moded to slip onto the 4 bolt cylinders with a short flex pipe to a Donaldson.
The other is two flex pipes to a dual inlet Donaldson. They both work, no differance. But remember I am using a nice Y manifold, not the old F pipe.
What I want to try is two single inlet Donaldsons, as the singles have a bigger megaphone stuffed inside the oval shaped midsection.
You ever cut one open ?
Last Edit: Dec 12, 2014 18:36:56 GMT -5 by weverat
They are AAEN pipes, I have no idea what they are supposed to fit. I am always looking for pipes at swap meets, got lucky one day and found the set which are being used on the free air Bubble.
Then, last year at Princeton, I found the FA 440 motor, and it came with the pipes in the picture, which happen to be the exact same pipes I found earlier at Douglas. Keep digging, and looking, something will pop up.
I am thinking the FA would be a good motor for a 71 Super Stinger, I think the pipes would wrap around and fit with minimal adjustment, just gotta find a FA hood and chassis. I have a stinger III, and a II, I guess I could cut and chop ? Not really looking for any new projects right now.
The blue whip is in great shape, and if I remember right, they were great trail sleds, so it will eventually get the original motor, clutch etc back in.
For now we are just having fun with it trying different stuff.
I have a Wheel Horse Safari Wide Track hood and belly pan, which appears would fit quite nicely on this chassis, along with a freshly built 503? ( possible sleeper?) I was thinking about using the old handle bars off of the Wheel Horse for further disguise
The only thing holding me back is I can't find a Wheel horse seat.
My mother in law gave me an old super junkie home made snowmobile trailer (she just wanted it out of her grove). Anyhow, I traded it site unseen for a Sting, which turned out to be a Blue Whip, still a cool sled, nice 6 bolt 440, very nice chasis, track, and drive train.
The steering was broke, had to remove engine, steering shaft, weld ,etc. Gave me a great chance to clean,and bond with it.
I been messing around trying differant motors. This is the old, old, 440 jlo free air found at Princeton. It came out of a whip oval racer, so I cleaned it up, carbs, timing etc. Darn thing starts right up, and runs pretty good. I doubt if I would ever actually campain this race engine, especially without proper hood scoops and air ducting.
I believe the 440 FA was never actually used in anything, it's only value would be as a novelty, or possibly parts to interchange with the 650FA as used in the King Kat.
I been ripping around the yard a bit with it, and it does pull pretty good, and will start with just a 1/2 wrap of rope!
Trying to post a video of the thing running,reving, smoking, and stinking up the hole garage type deal, but failed. Can we post a video from photo bucket?
Next in line is a Rotax 503. Another engine I restored a few years ago, and never got around to using. Can't wait to see if it will spin the track on an ol,Whip! Plan on using the Skidoo Safari exhaust to start with, and then try an AAEN Phazer pipe (they seem to work on everything)
I want to go that route, show us your home made design. I kind of figured on welding directly to the leaf spring, and that's ok, I like to weld. In fact, Scorpion snowmobiles are the only reason I know how to weld.
How do you make ski wideners for a whip with a single leaf spring ? I imagine it requires some welding?, or can I buy a bracket for this ? Anybody have an example.
Wow, just like off the show room floor! how could you sell it? Save it and stick it in your collection. Build a mezzanine and start stacking Scorps. The problem is getting paid for time and effort on these projects.
What are working on next? I threw a 76 Whip on my bench the other day, not sure what to do with it. Man them things are ugly. Really nice all aluminum chassis though.
The pipes are from a swap meet, have no idea what they were built for, but they are kinda small, maybe meant for a little 440. Strangely enough the antique free air 4 bolt JLO 440 I found at Princeton came with the exact pipes. Of course we had to cut and weld to make them fit.
I am not sure what rpm they will work best at, it would be fun to use a dyno to help find the power range, and sweet spot.
The sled is a bit of a Guild-ed Lilly right now, but we fully intend to put it to work, my guess is we are not done cutting and welding !
We had green grass yesterday, snow today, maybe test and tune this week.
Great Stories!, My dad was a ski-doo Nordic 440 guy, he would trade for a new one every couple years, I had three brothers, we tag teamed the thing, and it took a good beating.But they were clumsy, hard to steer, and hard to start.
My buddy had a Scorpion, at the time we just knew it as a Scorpion, now I realize it was actually a 72 Stinger III with the 400 or 440 CCW, probably a 400 but not sure. It had the wide track and a big long seat. Some times we would ride 3 up, and 2 on the Fold-A-Sled, all the way to the river (about 3 miles). We would have a camp fire, and sneak a beer if we could find some. Man that thing was a work horse.
Strangely enough I can not remember ever fixing or adjusting the carb, I guess back in those days the old Waldos just worked ? We replaced wear bars, bogie's, springs, windshields, skis,and learned how to weld !
Later my other buddy had a 400 or 440 TK (the yellow one with Para-Rail), that thing worked good and was fast!
I am sure there are lots of guy's on here that have converted the 71 wedge hoods to bubbles, and there are probably some posts or even complete threads on the subject.
If you cut the fin off to match the bubble chassis, you can mount the hinge and the hood fits right on. I am not sure if the handle bar bracing needs height adjustment or not ?
I was committed to no hinge,and a total custom look. The entire fin was trimmed flush, and the bumper was slammed tight to the curved tunnel, and welded in place. Then we chopped 3" off the bottom front of the hood, causing the hood to tilt forward. The idea was to change the angle of the hood, exposing more of the engine.
The other two pics are the dropped drive shaft, creating space for 1" picks. The way I do it you get to chop up the chaincase and the chassis !
I have to do the same thing to a 340 whip. I agree a 40 is to big, I am thinking 34 or 36, and am hoping someone has already done this, and they can get us close. I imagine the 4 and 6 bolt motors will be differant?