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Post by niz76 on Jun 5, 2015 1:13:56 GMT -5
Dang hope tomorrow goes smoother! Maybe having the car show moved up was a good thing? You always seem to do well under pressure! Scoot on!
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Post by 90GTVert on Jun 5, 2015 7:54:02 GMT -5
I don't have that much that I have to do to it anyhow. I was just hoping to pick up a little more performance up to 30-40MPH and I'd like to compare sliders to rollers. At least having the same gearing again I won't need to redo runs to compare my current slider weight times with others I've tried or redo any to compare with rollers later.
The current forecast is for rain next weekend, but hopefully that will change by the time it gets here. Usually it rains during the hot rod show in May so the car crowd may have used up their luck on that one having a beautiful weekend this year.
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Post by 90GTVert on Jun 5, 2015 19:00:58 GMT -5
Went out to do 0-50 runs with the 12g sliders, tried 11.5 and 12.5g before the gear fail. It didn't feel 100% to me, but maybe it's because I've been off of it for a bit. It's 70F and 80 something % humidity now, previous tests were more like 80F 50%, but the weather is supposed to go from cool with rain to about 90 and very humid over the coming week so I don't have a lot of choice. The times will tell me once I check all of those from the vid.
I went to the first spot and caught a truck going real slow. Pulled over and waited a few, then started my first 0-50MPH run. About caught the guy at the end of it. Turned around and did another. Turned around and was close to the truck again by the stop sign on that road. Followed him down a road with turns and trees so you can't see around going 20MPH. He went to the next spot that I do runs, of course. I stopped and waited for him to clear the 1/8-1/4 mile stretch. Did the first 0-50 and about caught him. Turned around and did another. Turned around and came back to head home. Caught the guy within a half mile. He stopped in the road and sat there when I got close. He prob thinks I'm some crazy scooter stalker.
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Post by 2TDave on Jun 5, 2015 19:42:16 GMT -5
Lol. Be careful!
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Post by 90GTVert on Jun 5, 2015 21:29:00 GMT -5
My feelings were correct. It sucks. 12g Sliders Averages 0-30 : 5.7 0-35 : 7.4 0-40 : 9.9 0-50 : 20.2 For comparison, here are the numbers I posted with 11.5 and 12.5g. No way the middle weights should be that slow. 11.5g 0-30MPH : 5.2 seconds 0-35MPH : 6.6 seconds 0-40MPH : 8.6 seconds 0-50MPH : 16.3 seconds 12.5g 0-30MPH : 5.2 seconds 0-35MPH : 6.6 seconds 0-40MPH : 8.6 seconds 0-50MPH : 16.0 seconds I think the RPM may be different, I mean more than it should be with 1/2g, but I'll look at the older vids to see for sure. I also forgot to mention that I installed the 14mm thermocouple under the plug before the ride. Max CHT was 298F. I didn't hold it WOT for miles or anything, but when I had the old AutoMeter CHT on there it could heat up into the low 300s WOT quickly. Either this gauge responds slow or reads low, or my old one was way high, or I'm running rich... or a combo of those. I think my older figures in the mid 300s WOT sounded about right though. I suspected it would be rich in this humidity, but it would prob be sputtering at 300F max on my old gauge. |
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Post by 90GTVert on Jun 6, 2015 14:48:04 GMT -5
I'd say it was running pretty rich :  I knew it was on the edge of rich anyway, but hoped to keep it there because it's good and safe for long periods of WOT. I may end up moving from a 100 to a 98 MJ, but not quite yet. I'm still hoping there will be some period when it will dry out enough that I can do a test run in similar conditions. I looked at the videos of runs so I could get a good idea of where RPM was and how it changed. It seems like revs are a bit low from the time there's slipping up till near 50MPH. Close enough that maybe it is just the richness causing it. Nothing in the 12g numbers is out of range of the numbers on either side that produced nearly identical results to each other and much better than the 12s other than the RPM at 30MPH. I did notice that the belt is down to 16.3mm, which isn't bad, but I swapped a new one in to see if that did anything.
| 11.5g Sliders
| 12g Sliders
| 12.5g Sliders
| 10MPH
| ~7,600RPM
| ~7,500RPM
| ~7,400RPM
| Slips Up To
| ~8,700RPM
| ~8,400RPM
| ~8,400RPM
| 30MPH
| 8,300-8,400RPM
| 7,900-8,000RPM
| 8,000-8,200RPM
| 40MPH
| 8,300-8,400RPM
| 8,100-8,200RPM
| 8,100-8,200RPM
| 50MPH
| 8,500-8,600RPM
| 8,400-8,500RPM
| 8,200-8,300RPM
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Post by 90GTVert on Jun 7, 2015 13:40:02 GMT -5
Took a ride to do test runs today since the humidity dropped to about 60% and temp was 75F. I guess I can't blame the weather so something changed when I messed up the gearbox. All weather changes seemed to do was knock a little time off on the top end.
| 12g Retry
| 10MPH
| ~7,800RPM
| Slips Up To
| ~8,600RPM
| 30MPH
| 8,000-8,100RPM
| 40MPH
| 8,100-8,200RPM
| 50MPH
| 8,200-8,300RPM
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0-30 : 5.7 0-35 : 7.4 0-40 : 9.8 0-50 : 19.7 I ran it WOT for at least a couple of miles and it got to 315F. Still low compared to what I'm used to and takes a while to get there. One bit of good news : I did actually see another scooter nearby when I was riding. She was off-roading though.  |
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Post by Elektrey on Jun 7, 2015 13:48:03 GMT -5
Current gears are 10.13, what were previous gears?
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Post by 90GTVert on Jun 7, 2015 15:49:14 GMT -5
10.13
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Post by Elektrey on Jun 7, 2015 15:50:46 GMT -5
thats weird then... maybe something else was damaged?
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Post by 90GTVert on Jun 7, 2015 15:59:02 GMT -5
I'm gonna have to check it over again. The bearing in the fixed half of the rear pulley is what I originally suspected, since it was by the area that was discolored from heat, but it seemed fine. The variator bits all seemed fine when I looked at them the other day. About the only thing I haven't looked at yet is the TD, but since grease looked alright even in the bearing near the blued part of the driveshaft I'd expect it to be OK as well.
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Post by Elektrey on Jun 7, 2015 16:33:00 GMT -5
it would take a good amount of added friction to slow you down that much so I would expect whatever part is failing would be pretty hot after a short run
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Post by oldgeek on Jun 7, 2015 17:47:43 GMT -5
After your gearbox mishap, I questioned the condition of the non replaceable bearing in the gearbox. How did it look when you put it all back together?
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Post by 90GTVert on Jun 7, 2015 21:26:20 GMT -5
Non-replaceable bearing? They were all replaced. The one on the primary driveshaft, the 1 for the countershaft, and the 2 for the output shaft/axle. EDIT : You mean where the countershaft rides on the large case side? I don't recall it looking worn, though I don't know that I spent much time looking at it. The wheel spins as well as it ever has now. I took the rear pulley apart. The grease was brown, but really nothing that worried me. Still I cleaned it and made sure there was no damage/wear in the grooves that would be a problem and then re-greased it. It all spins well, operates smooth, etc...   The wind picked up, but I went for another ride. Did some runs up to 40MPH that aren't influenced so bad by wind in spots with trees around. The numbers are pretty much identical to before. Maybe I'm overlooking something simple like adjusting the rear brake too tight, though again the wheel spins easily enough. The only other thing I changed at the same time as the gear swap was the spark plug when I was switching thermocouples. Really don't think that's the issue though. |
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Post by oldgeek on Jun 7, 2015 21:36:44 GMT -5
The one in the case that the intermediate gear/counter shaft plugs into? It is a slip fit bushing style made into the case. I don't understand why they did not put a bearing in that position. In the video where you pulled the gearbox apart it looked pretty rough, but maybe that one does not matter? I don't know just trying to help.  EDIT: In your video @ 4:19 It appears to me that the hole is lopsided, but they may have bored it that way on purpose instead of dead center of the casting? I hope I am full of it for your sake bro. |
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