Safety 1st MO140 Specifications download pdf (Page 27)

J. Engine throttles

1. All pulling vehicles must be equipped with a deadman’s throttle. All throttles working in a

forward-rearward direction shall be closed in the rearmost position. Must be positive, two

way, mechanical linkage. All foot throttles must have a toe strap. No hydraulic throttle

linkage allowed.

2. All injection or butterfly shafts on engines must have dual return to idle arms and springs,

one on each side. All diesel engines will have a visible return-to- idle spring on fuel

injection pump lever

3. No computers allowed that control any mechanical operation of the competing vehicle.

RPM-limiters are exempt of this rule.

No automated or computer controlled or operated traction control devices.

4. Computer controlled electronic fuel management allowed.

K. Exhaust systems

1. All exhaust pipes must discharge vertically. Height to be a minimum of 305 mm above

the bend in the pipe which discharges vertically measured from the top of the pipe to

bottom of bend (see illustration 2-12).

All exhaust pipes must be securely attached.

Vertical is defined as being within 10 degrees, in any direction of being in plumb. Rain

caps may not be used.

No megaphone pipes are allowed. Venturi type headers are acceptable.

Illustration 2-12: measurements exhaust pipes

2. Turbocharged engines must have two M10 grade 8.8 bolts through exhaust pipe(s) in

vertical portion of exhaust pipe(s). Bolts are allowed to be welded through pipe(s). Head

of bolts must remain for inspection. Bolts to be installed 90 degrees to each other, within

max. 25 mm of each other.

All pulling vehicles with an exhaust-pipe over 95 mm diameter must have extra cross in

exhaust-pipe, rotated 45 degrees from the first cross.

Both crosses closest possible to each other.

2009 2-19

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Safety 1st MO140 Specifications Page 27