Heymow - Lawnmower Racing Forum

Mower Building / Setup Help => Driveline => Topic started by: Lucas on June 12, 2018, 09:06:16 pm

Title: RAGB gearing questions
Post by: Lucas on June 12, 2018, 09:06:16 pm
Hello all, I have a racing mower with a 18HP vangaurd (stock), it’s got a 5 “ engine pulley 10” gear box, then a 16 tooth to 60. What do I have wrong here my rear ratio is 3.75-1. My mower has no go down the straight. Any help be great  :confused:
Title: Re: RAGB gearing questions
Post by: Negrey on June 13, 2018, 12:06:31 am
Did you check that you're getting full rpm out of your engine? Belt clutch or centrifugal clutch? What size rear tires?
Title: Re: RAGB gearing questions
Post by: Lucas on June 13, 2018, 07:02:38 am
Belt clutch with 16x7.50x8
Title: Re: RAGB gearing questions
Post by: PJG56 on June 13, 2018, 08:32:50 am
Hello all, I have a racing mower with a 18HP vangaurd (stock), it’s got a 5 “ engine pulley 10” gear box, then a 16 tooth to 60. What do I have wrong here my rear ratio is 3.75-1. My mower has no go down the straight. Any help be great  :confused:

For one thing your final gear ratio is 7.50-1
If you are running governed 3650 rpm your doing about 23-24 mph with your setup ,that's why you have no straightaway speed
Title: Re: RAGB gearing questions
Post by: Lucas on June 13, 2018, 09:09:52 am
I have the governor removed from my engine, what ratio should I be around ?
Title: Re: RAGB gearing questions
Post by: birdman_express on June 28, 2018, 09:49:55 am
I have the governor removed from my engine, what ratio should I be around ?

With the governor removed you should have a Billet Flywheel.