In the Schwinn setup there is place to set wheel circumference. Measure the distance required for the front wheel to travel one full revolution in mm and input that number into your speedometer.You should be getting a number close to 1600 mm for a 20" tire. _________________ 08 Joyner SandViper 250
07 Joyner SandSpider 650
06 Tank Urban Touring 150SE
04 Yerf-Dog Spiderbox 4209 GX150 (SOLD)
04 Yerf-Dog Spiderbox 3206 GX150
81 Honda Passport C70B
Remember, it's not the diameter of the tire, it's the circumference that the magnet travels. Most of the time this is the approx. circumference of the rim. _________________ Chris Dierkens
'04 Yerf-Dog 3206 10g Rollers, 1500# Spring, Reverse, SuperTrapp, Uni
'04 KPX Xterro: pumper carb, oil cooling, 10g rollers, Junkies pipe, Uni
'05 Blade 150 DX: 4 Valve head, 10g rollers, East Side pipe, Uni
www.northeastbuggy.com
It is the circumference of the tire that determines the measurement. The height of the tire will determine how much ground you cover per rotation. Varying magnet and sensor placement will still yield the same number of mm per revolution. Placing the magnet closer to the outside of the wheel will cause a short duration pulse at the same interval as placing it closer tot the hub and getting a longer pulse. _________________ 08 Joyner SandViper 250
07 Joyner SandSpider 650
06 Tank Urban Touring 150SE
04 Yerf-Dog Spiderbox 4209 GX150 (SOLD)
04 Yerf-Dog Spiderbox 3206 GX150
81 Honda Passport C70B
It is the circumference of the tire that determines the measurement. The height of the tire will determine how much ground you cover per rotation. Varying magnet and sensor placement will still yield the same number of mm per revolution. placing the magnet closer to the outside of the wheel will cause a short duration pulse at the same interval as placing it closer tot the hub and getting a longer pulse.
I understand that...
We're saying the same thing..
Moving the magenet/sensor does have an affect on the speedometer calibration. _________________ Chris Dierkens
'04 Yerf-Dog 3206 10g Rollers, 1500# Spring, Reverse, SuperTrapp, Uni
'04 KPX Xterro: pumper carb, oil cooling, 10g rollers, Junkies pipe, Uni
'05 Blade 150 DX: 4 Valve head, 10g rollers, East Side pipe, Uni
www.northeastbuggy.com
It is the circumference of the tire that determines the measurement. The height of the tire will determine how much ground you cover per rotation. Varying magnet and sensor placement will still yield the same number of mm per revolution. placing the magnet closer to the outside of the wheel will cause a short duration pulse at the same interval as placing it closer tot the hub and getting a longer pulse.
I understand that...
We're saying the same thing..
Moving the magenet/sensor does have an affect on the speedometer calibration.
Actually you're not. Rim size or location of the magnet makes no difference. The magnet makes 1 revolution with the tire regardless at what radius it's mounted. The only measurement that matters is the circumference of the contact area of the tire. There's a small "fudge factor" involved due to tire inflation & how much "squish" there is at the bottom so it's really best to play with the input number to get the speedo readout to agree with a GPS but you'll get very close with the measured circ. or by calculating it by multiplying the tire height (mm) X 3.1416. _________________ _________________
2 Polaris RZRs & a Dune 150. Ridge Runner--Gone. Yerfdog 3206--Gone (but you never forget your 1st!).
Buggy pictures, mods, ideas, how-to's:
http://tinyurl.com/8ltm8
Actually you're not. Rim size or location of the magnet makes no difference. The magnet makes 1 revolution with the tire regardless at what radius it's mounted. The only measurement that matters is the circumference of the contact area of the tire. There's a small "fudge factor" involved due to tire inflation & how much "squish" there is at the bottom so it's really best to play with the input number to get the speedo readout to agree with a GPS but you'll get very close with the measured circ. or by calculating it by multiplying the tire height (mm) X 3.1416.
You're right, I don't know what I was thinking. Too many sleepness work nights.
I was thinking of a particular pulse generation on a turbine/generator set. Similar but different....
Sorry _________________ Chris Dierkens
'04 Yerf-Dog 3206 10g Rollers, 1500# Spring, Reverse, SuperTrapp, Uni
'04 KPX Xterro: pumper carb, oil cooling, 10g rollers, Junkies pipe, Uni
'05 Blade 150 DX: 4 Valve head, 10g rollers, East Side pipe, Uni
www.northeastbuggy.com
Just run WOT next to a vehicle and have THEM tell you how fast. Sounds a lot easier!!!! _________________ 05' Carter Talon GSX 150 2R
39t rear sprocket
9.5g sliders
NGK Iridium Plug
H.O. Bando Coil
Dr.P Hit clutch (backup)
1500# torque spring (soon...very soon)
125 main jet
42 pilot jet
MRP Air Filter (rednecked)
Drilled out stock exhaust
Just run WOT next to a vehicle and have THEM tell you how fast. Sounds a lot easier!!!!
Hey, if they pull you over you're going too fast... Otherwise you still need to mod. _________________ Chris Dierkens
'04 Yerf-Dog 3206 10g Rollers, 1500# Spring, Reverse, SuperTrapp, Uni
'04 KPX Xterro: pumper carb, oil cooling, 10g rollers, Junkies pipe, Uni
'05 Blade 150 DX: 4 Valve head, 10g rollers, East Side pipe, Uni
www.northeastbuggy.com
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