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Rules
Age
8 to 15
years old.
Chassis
will
follow Deerfield Raceway Micro Sprints Rules, except for the following:
1. Car must use a used Micro Frame chassis and cage.
2. Wing not mandatory, but recommended.
3. A gear ratio of 5.74 to 1 or higher is legal.
4. Minimum drive ratio is 5.73 to 1.
5. Hoosier tires only.
6. Max tire circumference 65".
7. 550 lb. Minimum weight after feature.
8. Driver and arm restraints are mandatory.
9. Starter switch must be in reach of driver.
10. Chain guard must be constructed to prevent chain from
hitting the driver in case of chain failure.
11. Front and rear bumper to be 4" to 6" narrower than the over
all width of the front and rear tires. Front bumper to be a
loop style bumper.
Engine
will be 9 H.P. Honda GX 270 Industrial - Model QAEZ, Honda part #558400
with electric starter that is functional.
1. Governor is not mandatory.
2. Counter balance shaft is mandatory.
3. Air cleaner must be stock as per O.E.M.
4. Must run stock 9 HP Cam; lift and profile subject to degree
wheel and dial indicator tech. No aftermarket reground cams
permitted. Compression release must be functional.
5. All valve train components must remain stock. No tech
on valve lash adjustments.
6.
Stock 9 HP carburetor only; bores, venture, jet, orifices,
emulsion tube and other internal part diameters are subject to
tech
against a known stock 9 HP carburetor.
7. No lightening of flywheel; must contain all internal
magnets
and the generating coil intact and functional as per O.E.M.
8. Combustion chamber subject to minimum volume cc tech.
Multiple head gaskets may be used to meet min. volume tech.
9. Ignition timing must remain in stock location. Subject to
degree wheel BTC tech.
10. No porting, polishing, beveling or adding epoxy. Removal
or additional of material in port areas is not permitted!
11. Stock bore and stroke only.
12. Any component not mentioned is to remain as per O.E.M.
13. Do
not read anything into the engine rules what is not there!
Clutch
is to be shoe style only. No plated type disc clutches.
Fuel/Exhaust
System
1. Pump gas only. No hot fuel or racing gas.
2.
Fuel subject to tech by electronic meter, water test or
gas
calibrated hydrometer.
3.
Gravity fed fuel system only.
4.
Muffler must be factory only. Exterior and outlet hole must
must
remain stock appearing. Exit hole length and maximum
inside diameter subject to tech.
5. No flammable oil additives. Oil subject to flame test after
feature event.
Tech
inspection specifications
will be published.
2012 Engine Claim : An Engine may only be
claimed after winning three feature events. The Claim in the Jr. Sprint
Division, for engine only, is $600 and Claimer's engine.Only the owner
of a car finishing on the lead lap the night of said Claim may claim the
engine. Claim must be placed with Deerfield's Race Director thirty
minutes prior to race. Engine being claimed must win the feature event
the night of the Claim to
consummate Claim. If any owner refuses to sell their engine upon proper
claim, that car will be suspended for the remainder of the season in the
Deerfield Raceway Jr. Sprint Division.
Spirit
and Intent:
The
purpose of the Jr. Sprint Class is to provide a
relatively cost efficient, controlled and competitive class for our
younger racers. In an effort to limit expensive performance
modifications it may be necessary at times to alter the rules.
Your cooperation will be appreciated.
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