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Post by weverat on Sept 2, 2015 21:07:08 GMT -5
 The beginning, 400 6 bolt cylinders. I plan to use a 1980 Sting w/ parra slide II (stock E right?) |
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Post by pararailer on Sept 2, 2015 21:40:28 GMT -5
Here we go! Weverat got the grass drag bug now too!
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Post by weverat on Sept 6, 2015 10:52:21 GMT -5
Are the Sting 3.29 drive wheels notorious for slipping?
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Post by obj1 on Sept 6, 2015 17:16:21 GMT -5
I had a 80 sting that would ratchet very easy. Track was tight as could go. Must have something with that track/skid design cuz we never ratchet anything else.
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Post by weverat on Sept 7, 2015 10:16:20 GMT -5
I am trying to build a ringer for the E class, of which I was thinking would be a 1979 400 Sting with a 1980 Sting 440 pipe and Cdi ignition. Upon checking out the 80 Sting I conclude the PS III suspension is very nice, but prone to ratcheting, and The track roles hard, with way to much resistance. So I picked up this 79 340 Whip as a donor sled, but as usual, (it happens to me every time) it is to nice to part out. It is barn fresh, with only 577 miles. Will the track and suspension bolt into the Sting? Or, should I just use the Whip with a Sting hood and pipe? Would this be cheating, (grey area).   |
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Post by obj1 on Sept 7, 2015 13:58:17 GMT -5
Check the rules close. I don't think you can mix-n-match like that. We just run the 72 stinger and 73 super stinger 440's. If you check our time slips you'll find our 400 "F" sleds are just as fast. In fact, the purple 400 won both E & F at Princeton last year. You need to get into 7 sec. To compete. So,Weverat just get a 4 bolt 440 and let it rip!!
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Post by weverat on Sept 7, 2015 16:48:03 GMT -5
But,but - Don,t chya think a 6 bolt 400 sting with a para rail would maybe, possibly, be a tad faster? I am just trying to pick the model with the most potential to start with.
You know I have campaigned a 4 bolt 440 Donaldson set up on the ice for a long time. I am now hell bent on building something with the Sting pipe. Are the 400 and 440 Sting pipes identical?
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Post by stingerIII on Sept 7, 2015 20:47:03 GMT -5
The Scorpion Whip models are kind of like a Lego sled ,I took a 400 1975 whip and put a Rangewhip
track ,engine and exhaust into it ,let the local race officials as to the part changes ,they said it is still
an F class sled with factory parts(it had a E class 440 transplanted into it when I got it)
The Whips are a little heavier but not by much.We use the Sting's and Rangewhip chassis as trail riders and race the Whip's
in the wintage drags.
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Post by obj1 on Sept 7, 2015 22:11:16 GMT -5
We have spent hours and hours testing sleds. Yes the aluminum chassis sleds are lighter overall, but much heaver on the skis. We have a 75 400 whip that has a few wins including Princeton once. Any wins were purely on reaction time. This sled with a "very good" 400 is retired at my cabin in favor of the mid-mount engine superstingers. 400's or 440's run real close (hi 7 sec. In 500ft) To grass race a paraslide, it would have to roll and transfer weight like a pararail. "retired" whip  E-stock rocket  D-stockers  F-stock benchmark!  These tracks DONT ratchet!  |
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Post by weverat on Dec 7, 2015 20:45:02 GMT -5
Ok, made some progress on the 400 JLO motor. I tore apart 3 junk motors hoping to find a good crank,as it turned out the junk motors were junk, I just had to take them apart to make sure?
Finally, had to sacrificed a nice low mileage 79 340 Whip engine, and found a strait true crank.
Gathered up all the 400 6 bolt cylinders I had, turns out 3 of them are good enough for standard size pee stones.
Bought every Wiseco red box (2 small skinny rings) pistons I could find on e-bay. Wound up with some standards, and .040 overs. Could not find .010 over, not sure if wiseco ever made them in the 65mm bore. Seems to be a lot of .080 over pistons available, but the rules allow for a max 1mm over stock.
All engine parts are cleaned, polished, whatever-ed, and ready for assembly. Have a new Mikuni brand carb adapter, and a few gasket sets.
The pistons have a .006 fit, I like .0045. These are drag race motors, (never get hot like a trail sled).
I send the pistons to a guy in Michigan, he ceramic coats the tops, and puts an abraidable finish (probably just powder coating) on the skirts. This adds 5 to 6 thou to the piston, and you now have to push them through the bore back and fourth by hand until it is loose enough to assemble and carefully run the engine.
Break in is critical. Usually after some time we disassemble,and sand the high spots. Finally ready to race. Good for about 4 or 5 races, then we get to start all over.
The abraidable coating on the skirts is meant to provide a scribe fit, and save an overbore. Great for an instant tune up on an old motor which is borderline in need of a bore job.
OBJ, I am expecting some feed back on this, you have been way to quite, kinda scaring me, you and Roger are up to something!
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Post by obj1 on Dec 7, 2015 21:11:12 GMT -5
Ha, im the one thats scared! Now i gotta save up for a new belt. Should clean clutches too. You know how to get clutches off of these things?
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Post by weverat on Dec 8, 2015 7:13:44 GMT -5
We typically use a chain hoist,blow torch,2 double jacks and a crow bar. They pop right off.
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Post by tritowns on Dec 8, 2015 21:20:37 GMT -5
Don't say that out loud.... I'm working on an arctic cat engine that I'm sure someone used that exact method to try to get it's clutch off and it failed... I hate amateurs
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Post by 75whip on Dec 8, 2015 21:27:33 GMT -5
Oh weverat. your the one who has all the wiseco skinny ring 400 pistons. LOL
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Post by weverat on Dec 8, 2015 22:52:21 GMT -5
I have the 400 cc pistons, no 440,s. I have been using SPI pistons in the 440,s. This is my first time with the wisecos.
Yes, the remove clutch with a big hammer seems to happen way to often, I just saw a nice old Polaris XLT tripple that must have been smacked hard, as the crank is no longer true.
What do you guy's think about the JLO Hemi heads (strait plug), in comparison to the older style wedge heads (angle plug)?
For unknown reasons, I think the wedge style make more power, and maybe run hotter.
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Post by obj1 on Dec 9, 2015 21:21:48 GMT -5
Ya Weverat, i bet our clutches would never come off. We havent even opened the hoods in years. You need to come to Star Prairie and help. Bring some used belts just in case. Get some belts from some Mach z ski doo's cuz i heard they are fast.
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Post by weverat on Dec 19, 2015 20:46:36 GMT -5
  Ok, here it is, another JLO is born. Damn thing was a lot of work. Built the whole thing out my parts stash and a few e-bay deals, so it took time to scrounge up parts. Made some final adjustments on the crank this mourning, and then it took all day to assemble. I am not so sure about those cheesy little Y C KO pee stones, we will see. The piston fit was .006 before coating, now .0015. After break in it should be about .0045. I went with the Hemi heads. I believe the timing spec for these is .102 to .110. With the wedge heads the spec was .083 to .102 You guy,s might not agree but I set mine at .095 Mag side, and .092 Clutch. Sounds conservative I know, but am hoping to run some rpm,s on this one. I checked the timing on my 80 Sting with electronic ignition, it was .130 @ idle and .090 @ 5000 rpm. It has the Hemi heads. I think Chip runs his drag sled timing way up there, like .110 or higher. It would be fun to use a dyno and try a few things. |
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Post by 80whip440 on Dec 19, 2015 21:07:21 GMT -5
Where'd you get those spanky new intake insulators?
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Post by weverat on Dec 19, 2015 21:16:40 GMT -5
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Post by obj1 on Dec 19, 2015 23:05:17 GMT -5
Crap! Weaverat is wotking on timing stuff and we aint even got our clutch off yet. We are in trouble!
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