Event Schedule Photos and Videos MMTTPA Rules Contact Us
Announcements Links Main Page Results Page Tractor Rules
9500 Pro-Field
1) Cubic inch limit for the 9500-lb class is 640. Any tractor running 466ci and under can run 3500 rpm's maximum. Any tractor over 466ci must run 3000 rpm's maximum. All tractors will run at the same weight of 9500 lb and can run the maximum hitch height of 20 inches.
2)
Kill switches, drivers must be able to emergency stop tractor from
tractor seat this must be consider primary kill switch. Air shutoff must be
spring-loaded closed.
2. 3) The turbo cannot exceed a Box Garrett 3x3 GT 4202 or a GT 4202R single turbo charger. Must meet 4 different exhaust housing’s but can run any make and model turbo 2.75 and smaller. All tips of wheel must protrude into housing 1/8” inch and slots must measure same as GT42. .
TURBO WILL BE GARRETT GT42 WITH THE FOLLOWING PART NUMBERS:
712402-5008 GARRETT GT42 STD CHRA
451888-5011 GARRETT GT42 BALL
BEAERING CHRA
446397-0460 V-BAND
446401-5795 V-BAND
447884-0041 INTAKE COMPRESSOR COVER
(BAND CLAMP OUTLET)
757708-0002 INTAKE COMPRESSOR COVER
(BAND CLAMP OUTLET) W/CLAMPS KIT
712340-0033 INTAKE COMPRESSOR WHEEL
(FITS BOTH STD & BALL BEARING CHRA)
714470-0001 EXHAUST TURBINE WHEEL (STD)
714470-0007 EXHAUST TURBINE WHEEL (BALL
BEARING)
740659-0006 OVERHAUL KIT (STD ONLY)
757707-0001 EXHAUST TURBINE HOUSING 1.01
757707-0002 EXHAUST TURBINE HOUSING 1.15
757707-0003 EXHAUST TURBINE HOUSING 1.28
757707-0004 EXHAUST TURBINE HOUSING 1.44
4)
Waste gated exhaust housing allowed, but must be altered to look like
non-waste gated exhaust housing. All passages internal and external, must be
plugged.
5) Must
have working tach cable with 1 magnet (female connection from tractor) to hook
to sled. CAN NOT tach more than 3000 RPM per tach box during pull.
If the tach box records greater than 3000 RPM during the pull, that tractor will
be disqualified, unless the tach box is determined to be inaccurate. If
the tach box is inaccurate, alternate method of checking RPM will be a handheld
tach at the end of the track. Person reading the tach box is responsible
for decision of which tractors to hand check
6) The consequence for exceeding the RPM limit are as follows: (1) first offense is forfeit prize money
and all points (max of 16 points) for that class, (2) second offense is the same
as for first offense, and (3) the third offense is 1 year and 1 day suspension
for that tractor for all classes in which it competes. The first and
second offenses in one weight class do not add to violations in the second
class.
7) P series injection pumps allowed.
8) No nitrous oxide or propane.
9)
Water and or alcohol injection allowed.
10) Tire size maximum of 24.5x 32.
11) Tractor must have side shields covering engine compartment that will
contain any fluids or engine parts.
12) Tractor must have steel flywheel, no cast iron allowed.
13) Tractors will be equipped with a clutch blanket or steel shield no less
than ¼” thick and 5-inches wide.
14) Engine must run on factory designed fuel.
15) 2 springs to pull throttle back to idle; 1 on pump 1 on throttle handle.