Topic: Son's New Super Stock/imow build for 07 with 820

[eddiehenjr]

And what's doing for the motor?

[George Herrin]

Ain't decided. A 12hp or 14.5. Arma rules allow an OHV in Super Stock. I have both.

[eddiehenjr]

What is ARMA Super Stock class?

[money89tractors]

SUPER STOCK:
•   Must be a full-size lawnmower with a 39” unaltered wheelbase, front engine origin, stamped steel frame, and have a steering column located behind the motor.
•   Mowers will use a governed engine with a 3650 RPM maximum (no load).
•   Motors may be any single-cylinder valve-in-block (flathead) or overhead value (ohv) engines 15 horsepower and under with a 465 cc maximum in  the original factory location.
•   The  engine must be as delivered from the factory, internally and externally, with the following exceptions;  air cleaner, air filter or velocity stack, open exhaust and the removal of the debris screen covering the flywheel to allow quick and easy access to the flywheel nut while checking the 8 to 1 gear ratio.
•   Transmission or transaxle must be shiftable and of lawnmower origin.
•   The gear ratio in the highest gear must be 8 to 1.  For example, while in the highest gear, the rear wheels can turn no more than one revolution every time the engine rotates eight times.
•   Body must be stock, without external alterations.
•   Discreet frame strengthening is allowed.  The front axle may be reinforced, substituted or fabricated.  Racer-fabricated axles will be reviewed by the Tech Inspector to determine their apparent safety for racing.  Aluminum is not permitted as the material for the axle.
•   Front spindles are to be a minimum of 5/8” in diameter.
•   Metal rims are to be used both front and rear. Rim size will be 6” diameter in the front and 8” diameter in the rear.  Rear rims may be reinforced on the inside.
•   Front tires will be 13” diameter.  Rear tires will be 16” diameter.
•   Mowers must have steel factory decks.

-Phil

[ajgetz]

George, you and your Son are doing a great job on that machine. The setup of the machine is very like the machine I'm running. I am also running a 820-017 with a jack shaft setup with a square tube frame welded in on a MTD chassis.

What gear will it be racing in?

Will you be taking out the reverse chain?

Andrew

[George Herrin]

Per our rules we will race in the highest gear in this case 4th I removed 5th and 6th. Its a 8 to ratio at a governed engine speed of 3650.

[ajgetz]

I ran in 3rd gear last year with my 5 speed 820-017 which most likely would be the same as your sons 4th gear. I was think of running 13 inch rear tires this year and going up to perhaps 5th gear. Just not sure if 5th will be strong enough.

Now did you decide to go with 4 gear because you believe it will be the strongest with both meshed gears being of a fair size instead of running in 6 with one big gear and one small gear.

Also are you removing the chain in the transaxle or leaving it in? I have been thinking about removing mine as I'm not sure the chain will hold up.

Andrew

[George Herrin]

Since our rules state 8 to 1 in the highest availble gear. 4th was the closest to that. SO I removed everything above 4th. and Adjusted the pulley from there to get 8 to 1. I didn't remove the chain because its governed class with a gear ratio restriction. Now if it was ungoverned and no ratio yup chain would come out.

[grassthrasher]

any new updates?

[George Herrin]

I have been tremndously busy and havn't been able to help Jacob with it. We have to finish it this weekend so updates will come after.

[FarmBoiRacer]

HEY!
 I must say this build looks very kewl. I'm just gettin started into this mower racing thing and I just wanna make sure about somethin...do you stay in the same gear during the whole race or how does that work? Since we were on the rules and gear ratio subject... Thnx
                                                     Dallas

[George Herrin]

yes we don't shift while racing. This is a set ratio and that is in the highest gear thats what they race in in the Super Stock class.

[coreyk]

George what type of flux core wire do you use?

[FarmBoiRacer]

Alrity, that's what I thought, thanx

[George Herrin]

good question, what ever brand TSC sells 11lb rolls.