8 To 1 High Speed Gears Question!

classycarts · 02-23-2010, 03:20 PM

Is there anyone here who has installed the 8 to 1 gear ratio in a G2 type rearend, and can tell me what mph gain there was over the stock ratio. First hand experience would be great, my combo is hard to figure using the formula. Thanks!

dougmcp · 02-23-2010, 03:32 PM

I stumbled on this for an electric G2:

Quote:

This gear set changes the gear ratio in your transaxle from approximately 12.5:1 down to 8:1. On most cars with stock tires, motor, and controller, it will increase your speed from appoximately 12-13 mph, up to about 20-21 mph.

Speed (mph) = (rpms of motor x radius of tire) / (gear ratio x 168

12.5: 1 Gear Ratio

12.857 mph = (3000 x 9) / (12.5 x 168 = (27,000 / 2,100)

8.0:1 Gear Ratio

20.089 mph = (3000 x 9) / (8 x 168 = (27,000 / 1,344)

Looks like about a 75% speed gain, you will also have a reduction in torque.

classycarts · 02-23-2010, 04:03 PM

Thanks doug!
This is for a gas cart. So far I got 12 to 15mph gain from the parts supplier to a 34mph gain from a friend who should know the math.
I'm just looking to pickup a little speed, not alot! This may just have to be a trial and error thing. Hopfully without the error part.

ezgokilla · 02-23-2010, 04:39 PM

can i put 8:1 gears in my lifted g16 ?it already gets like 35 mph so would the hi-speed gears give me like 45-50 mph?

dougmcp · 02-23-2010, 05:05 PM

Quote:

Originally Posted by classycarts

Thanks doug!
This is for a gas cart. So far I got 12 to 15mph gain from the parts supplier to a 34mph gain from a friend who should know the math.
I'm just looking to pickup a little speed, not alot! This may just have to be a trial and error thing. Hopfully without the error part.

If you're just looking for a little more speed, how about upping the RPM of the motor or a larger tire diameter?

ezgokilla · 02-23-2010, 05:39 PM

there a little mod i know to get a little extra speed.your throttle cable is mounted to a bracket on the axle or gear box.take the bolt out holding the bracket.put 1" of spacer's on the bolt .put it back together this should put alot of tension on the cable.take it for a spin will make the engine rev higher

rfont82 · 03-13-2013, 12:04 AM

ezgokilla, have you tried that spacer mod yet? Also, what mods do u have done to your card?

rfont82 · 03-13-2013, 12:05 AM

cart not card

rib33024 · 03-13-2013, 01:32 AM

Welcome to BGW rfont82

ezgokilla

Last Activity: 04-07-2010 08:44 PM

sho305 · 03-13-2013, 06:29 PM

Look up the gear ratio on a '93 gas club car, I imagine it is same as yamaha or close. It had the single flathead engine, robin or whatever they used. Anyway I put HS gears in and it would do 28gps on the rev limiter. I did not gps before but imagine it did teens. Cart totally stock otherwise. So I would say roughly 10mph from what you get now depending on where your governor is.

02-23-2010, 03:20 PM	#1
classycarts Gone Wild Join Date: Sep 2007 Location: Ohio Posts: 483	8 To 1 High Speed Gears Question! Is there anyone here who has installed the 8 to 1 gear ratio in a G2 type rearend, and can tell me what mph gain there was over the stock ratio. First hand experience would be great, my combo is hard to figure using the formula. Thanks!

02-23-2010, 04:03 PM	#3
classycarts Gone Wild Join Date: Sep 2007 Location: Ohio Posts: 483	Re: 8 To 1 High Speed Gears Question! Thanks doug! This is for a gas cart. So far I got 12 to 15mph gain from the parts supplier to a 34mph gain from a friend who should know the math. I'm just looking to pickup a little speed, not alot! This may just have to be a trial and error thing. Hopfully without the error part.

02-23-2010, 04:39 PM	#4
ezgokilla Not Yet Wild Join Date: Feb 2010 Location: southwest GA Posts: 71	Re: 8 To 1 High Speed Gears Question! can i put 8:1 gears in my lifted g16 ?it already gets like 35 mph so would the hi-speed gears give me like 45-50 mph?

02-23-2010, 05:39 PM	#6
ezgokilla Not Yet Wild Join Date: Feb 2010 Location: southwest GA Posts: 71	Re: 8 To 1 High Speed Gears Question! there a little mod i know to get a little extra speed.your throttle cable is mounted to a bracket on the axle or gear box.take the bolt out holding the bracket.put 1" of spacer's on the bolt .put it back together this should put alot of tension on the cable.take it for a spin will make the engine rev higher

03-13-2013, 12:04 AM	#7
rfont82 Not Yet Wild Join Date: Dec 2010 Posts: 3	Re: 8 To 1 High Speed Gears Question! ezgokilla, have you tried that spacer mod yet? Also, what mods do u have done to your card?
rfont82 Not Yet Wild Join Date: Dec 2010 Posts: 3

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03-13-2013, 12:05 AM	#8
rfont82 Not Yet Wild Join Date: Dec 2010 Posts: 3	Re: 8 To 1 High Speed Gears Question! cart not card
rfont82 Not Yet Wild Join Date: Dec 2010 Posts: 3

03-13-2013, 01:32 AM	#9
rib33024 ...................... Join Date: Apr 2009 Location: FT Lauderdale FL. Posts: 16,416	Re: 8 To 1 High Speed Gears Question! Welcome to BGW rfont82 ezgokilla Last Activity: 04-07-2010 08:44 PM

03-13-2013, 06:29 PM	#10
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,443	Re: 8 To 1 High Speed Gears Question! Look up the gear ratio on a '93 gas club car, I imagine it is same as yamaha or close. It had the single flathead engine, robin or whatever they used. Anyway I put HS gears in and it would do 28gps on the rev limiter. I did not gps before but imagine it did teens. Cart totally stock otherwise. So I would say roughly 10mph from what you get now depending on where your governor is.

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