Re: China Girl Motor Build
Time to start accessing the build performance.
It has about 200 break in miles I think, but I've kind of lost count. I'd caricaturize it as a brutal break-in so far. The cylinder has been off it twice since the initial completion. There was a small end bearing failure at 150 miles, and a base gasket failure about 50 miles later. Because of this insolent behavor I've beed whipping it like an ugle step child. Oil ratios have been all over the place, but always with good oil. At least one tank may have been as little as 40:1, but usually more oil than that.
I think fuel consumption is around 50-60 miles per tank now. It was guzzling the stuff till I jetted down to a tiny little 62 main jet. With a 66 I was getting 35 mile per tank.
Engine sprocket 10T rear wheel 36T
It's geared for 5.17 mph per 1000 rpm
I don't think we can ask much more than these kind of engine speeds. I'm thinking 7500 is pushing it, but this is for science.
I weigh, OMG 220 lb. I'm going on a diet tomorrow I promise.
This is what I'm seeing after a good long warm up.
16 mph = 3095 rpm, slowest cruising speed. fair power, good full throttle pull
20 mph = 3868 good smooth power
29 mph = 5609 rpm starts a slight flat spot
31 mph = 5996 rpm starts running like wild monkey above this speed
35 mph = 6770 rpm, I have to keep letting off the throttle to maintain this speed
38 mph = 7350 rpm will easily do on a flat
39.9 mph = 7718 top speed on a flat laying down
42 mph = 8124 rpm fastest speed so far on a downhill. Insane speed for a little china girl, but it's in the name of science.
This is the Cadillac's calculated speed to RPM.
RPM MPH
1000 5.2
1200 6.2
1400 7.2
1600 8.3
1800 9.3
2000 10.3
2200 11.4
2400 12.4
2600 13.4
2800 14.5
3000 15.5
3200 16.5
3400 17.6
3600 18.6
3800 19.6
4000 20.7
4200 21.7
4400 22.7
4600 23.8
4800 24.8
5000 25.8
5200 26.9
5400 27.9
5600 28.9
5800 30.0
6000 31.0
6200 32.0
6400 33.1
6600 34.1
6800 35.1
7000 36.2
Time to start accessing the build performance.
It has about 200 break in miles I think, but I've kind of lost count. I'd caricaturize it as a brutal break-in so far. The cylinder has been off it twice since the initial completion. There was a small end bearing failure at 150 miles, and a base gasket failure about 50 miles later. Because of this insolent behavor I've beed whipping it like an ugle step child. Oil ratios have been all over the place, but always with good oil. At least one tank may have been as little as 40:1, but usually more oil than that.
I think fuel consumption is around 50-60 miles per tank now. It was guzzling the stuff till I jetted down to a tiny little 62 main jet. With a 66 I was getting 35 mile per tank.
Engine sprocket 10T rear wheel 36T
It's geared for 5.17 mph per 1000 rpm
I don't think we can ask much more than these kind of engine speeds. I'm thinking 7500 is pushing it, but this is for science.
I weigh, OMG 220 lb. I'm going on a diet tomorrow I promise.
This is what I'm seeing after a good long warm up.
16 mph = 3095 rpm, slowest cruising speed. fair power, good full throttle pull
20 mph = 3868 good smooth power
29 mph = 5609 rpm starts a slight flat spot
31 mph = 5996 rpm starts running like wild monkey above this speed
35 mph = 6770 rpm, I have to keep letting off the throttle to maintain this speed
38 mph = 7350 rpm will easily do on a flat
39.9 mph = 7718 top speed on a flat laying down
42 mph = 8124 rpm fastest speed so far on a downhill. Insane speed for a little china girl, but it's in the name of science.
This is the Cadillac's calculated speed to RPM.
RPM MPH
1000 5.2
1200 6.2
1400 7.2
1600 8.3
1800 9.3
2000 10.3
2200 11.4
2400 12.4
2600 13.4
2800 14.5
3000 15.5
3200 16.5
3400 17.6
3600 18.6
3800 19.6
4000 20.7
4200 21.7
4400 22.7
4600 23.8
4800 24.8
5000 25.8
5200 26.9
5400 27.9
5600 28.9
5800 30.0
6000 31.0
6200 32.0
6400 33.1
6600 34.1
6800 35.1
7000 36.2
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