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Larry Richwine
Director of Technical Services
6705 E 900 N, Brownsburg, IN 46112
PH 317-852-0630 
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To order a NTPA rulebook, order online, call the NTPA office at 614-436-1761 or mail $6 plus $2 shipping and handling to WPI/NTPA, 6155-B Huntley Rd. Columbus, OH 43229. You may also order by e-mail at: This email address is being protected from spambots. You need JavaScript enabled to view it.  with credit card info.

2019 Crew Member Application
2019 Crew Member Application

Items/rule changes that go in effect for the 2019 season

General rules:
  •  Page 20 # 4 under drawbars changed to read 15 degrees instead of 10 (non FWD)
  • Page 31 #2 under exhaust, changed to 8 inches instead of one foot above the bend.
  • Page 40 # 5 add: Allow cannister motorsports tube-type blower belt shields in all divisions.
 
Super Stock 
Rule clarified regarding legal engines in Component Super Stocks (Open and Diesel)
Directs that 2018 Rule A.2 (OEM Chassis), which reads
“Only engines considered legal to be used in Super Stock division must be available in two wheel drive farm tractors (This applies to both OEM and Component type.)” be explicitly applied to define a “legal block” in Component Chassis, as stated in 2018 Rule A.2.16: “Component chassis tractors will be allowed to run any agricultural tractor sheet metal (1960 or newer) with any legal block.”
Notice: The joint executive boards of WPI / NTPA has deleted rule letter h. of number 16 on page 48 of the 2019 NTPA rulebook in order to clarify the FWD V-8 engine in the Super Stock tractor division.
 
Limited Pro Stock
Turbo limited to 4.5 inch diameter exhaust to be measured at the face of the wheel. Exhaust wheel must protrude into the 4.5 inch bore by 0.125” minimum. All exhaust must exit the 4.5 inch bore. Note the 4.1 inlet remains the same 
 
Light Pro St:
  1. Turbo limited to 4.5 inch diameter exhaust to be measured at the face of the wheel. Exhaust wheel must protrude into the 4.5 inch bore by 0.125” minimum. All exhaust must exit the 4.5 inch bore. No limit on inlet size.
  2. Aftermarket OEM recast block permitted
    1. recast steel only, no aluminum.
    2. camshaft must remain in the OEM location. No overhead camshafts permitted.
    3. fuel injection pump must remain in OEM location.
    4. center line of crankshaft to cylinder head, camshaft all OEM dimensions must be duplicated. 
    5. block width and length must be OEM measurements and able to use OEM gaskets.
 
Modified
Regional national level:
  1. Turbine horsepower limits raised to a maximum of 5350 total horsepower for  a one year period and  will be reviewed at the end of the 2019 season.
  2. Twin-Turbo Allison Plus Supercharged Allison Combination to Be Allowed in Regional National/State Modified
         Note: Adds the following specified combination to the list of allowed Regional National Modified engine combinations.
    1. One(1) Allison with up to two (2) turbochargers and one (1) Allison with single-stage supercharger. Maximum 9.6-1 supercharged ratio with a stock Allison 9.5 blower wheel with water. Must use SFI spec 4.2 blower containment device.
    2. Two (2) Allison engines with a maximum of 9.6-1 supercharged ratio with a stock Allison 9.5” blower wheel with water. Must use SFI spec 4.2 blower containment device.”
Grand national level:
  1. Super charger overdrive limit increased to 70% overdrive for Big Chief wedge head engines for a one-year trial
  2. Turbine horsepower limits raised to a maximum of 7500 total horsepower for a one year period and  will be reviewed at the end of the 2019 season.
 
Light Unlimited 
Current 2018 rules unchanged and locked In for three-year period (thru 2021 season)
 
Mini Rod:
  1. (This now applies to all minis regardless of rearend type)
    All mini rods must shield the transmission with a minimum of 0.125 steel or titanium. Shield must cover the full width of the transmission (minus the reverser) top and both sides while open at the bottom in a “U” shaped over the transmission. Shield not to exceed one inch air gap between shield and transmission. Shield must be attached at the top forward to the engine plate or engine and at the bottom to each side of the chassis.
    or be allowed a SFI 4.1 transmission blanket attached in the same fashion. 
  2. All mini rods must have a driveline tether to be center of driveline length
    • Tether must be constructed of a minimum of 2" wide by 3/32" thick nylon strap.
    • Tether must attach to one side to the frame then to the driveline shield then on to the other side of the frame by a minimum of one 3/8" grade five bolt at all three points of attachment. Strap must have metal grommet for each bolt to pass through. 
Causes for disqualification:
 Add the following:

1. Header pipe or pipes falling onto track shall not be grounds for disqualification. 
     Note: This does not apply to a turbocharger exhaust pipe

 
Pulloffs:
  1. At Grand national events, the track length will be a maximum of 330 feet. 
  2. At Regional national events, the maximum measurable distance will be 350 feet. Length/distance may be less as determined by that event’s insurance application and as verified by NTPA.”
  3. The boundary lines at all levels will extend to 330 feet.
  4. Vehicles will be red flagged if they exceed the maximum measurable length and must come back for a pulloff.
 

Effective immediately (6/4/2018) - All Mini Rods with Planetary Rear Axles Only:

Mini Rods with Planetary rear axles must shield the transmission with a minimum of .125 steel or titanium. Shield must cover the full width of the transmission (minus the reverser) top and both sides while open at the bottom in a “U” shaped over the transmission. Shield not to exceed one inch air gap between shield and transmission. Shield must be attached at the top forward to the engine plate or engine and at the bottom to each side of the chassis.

Or be allowed a transmission blanket consisting of 15 layers of Kevlar or 20 layers of ballistic nylon attached in the same fashion.

Here are some photos of a solid shield for the new mini rod transmission rule...

mini1mini2mini3

 

Tech Questions and Answers

Rain out rules

Question:

Mr. Richwine,

Please explain how a “Rain Out” works. When can the promoter call it off where I don’t have to show up to get rain points etc. I’ve heard a bunch of different versions of what should or has happened.

Answer:

Page 88 of the 2019 NTPA rulebook under letter E Inclement Weather states:

#7. If a session is cancelled more than 24 hours prior to start time
at GN/SN or 8 hours at RN/PN/state level, no points will be given
for that session.
#8. If a session is cancelled prior to start time, competitors will
receive refund of paid entry fees, but no other compensation.

With that said, if the event isn’t canceled within the time period described in #7 then you do have to travel to the event with your pulling vehicle and check in so the entry personnel can record your entry in order to receive rain points. The entry trailer must remain open until scheduled start time of the event in order for you to “check in”.

As to “Why do I have to take my pulling vehicle with me?” page 81 under Event Procedures and Requirements #4 reads:

#4. Vehicle must be present on the ground in running order and
ready to compete before being allowed to enter.

Cages at Pinetops

Question:

Will there be anyone at Pinetops to inspect rollcages since it's not a Regional event?

Answer:

No there won't,  if you have a cage with a NTPA/SFI sticker on it you will be allowed to run even if it's expired. But, if you don't have a sticker at all, then you will not be allowed to compete.
There will however be two cage inspectors at Benson, NC

EFI question

Question:

Do you allow EFI on blown engines in the TWD class?
Also EFI for spray bars in the hat?

Answer:

No, EFI is not allowed in any methanol classes of NTPA.

Shipshewana

Question:
Richwine,
Are you really gona check turbos at the Shipshawwna event?
I thought those rules were for the summer season.

Answer:
Yes, we started with the 2019 season at Cloverdale and will be checking turbos in all classes that have turbo limits and everything else
at Shipshewana as well as the rest of the season

Light Pro/Limited Pro Stock Turbo

Question:

Richwine,

When the rule says exhaust limit 4.5 inch and the wheel must proturde .125 inch into the bore, will the nut count? Its part of the wheel. Or if I have a couple of little fins in front of the regular wheel will they count? 


Answer:
No, the nut doesnt count. The rule says

  1. Turbo limited to 4.5 inch diameter exhaust to be measured at the face of the wheel.
  2. Exhaust wheel tips of wheel (each blade/fin, nut does not count) must protrude into the 4.5 inch bore by 0.125” minimum.
  3. All exhaust must exit the 4.5 inch bore.
    We are going to measure the turbo just like we have on the Super Farm class's 3 inch bore since the days when we "sealed" the turbo with a lead seal.

If we question how deep it goes into the bore you will be required to disassemble your turbo so we can measure it.

I included a picture of how / where we will measure the wheel


turbo exhaust

Lgt Pro Turbo Rule

Question:

Larry,
Is it true that the Reg III pullers in the Lgt Pro class don’t have to adhere to the limit on turbo exhaust?

Answer:

No Mark, that rule is for all NTPA Lgt Pro classes. Region III is no different than any other...

Mini Driveline Tether

Here are some photos of an example of a good mini driveline tether.
FullSizeR
IMG953103
IMG953106

Notice on rule update

Notice: The joint executive boards of WPI / NTPA has deleted rule letter h. of number 16 on page 48 of the 2019 NTPA rulebook in order to clarify the FWD V-8 engine in the Super Stock tractor division.

Hot Farm tires

Question:

Mr. Larry,
Can I run my 24.5 tires in the Hot Farm class? I dont want to buy 20.8's but, my tractor fits the hot farm class all but tires.
If not, WHY not.

Answer:

No, you can't run the 24.5 tires in the Hot farm class. The reason is that the class needs to and does look different than all the other classes from the grandstand.
You will be surprised how good your tractor hooks up with 20.8 tires on it.

Cell ph sled

Question:

Mr. Larry, isn’t there a rule that says a sled operator’s not to use a cell phone or anything that distracts from the operation of the sled during the run?  We’ve got a sled where I live that the operator seems like he’s always busy “texting or videoing” during the run. I think that's pretty dangerous. What bout that?

Answer:

Yes, on page 103 of the 2018 NTPA rulebook the rules for sled operators are listed.

11. Sled Owner/Operator/Crew conduct:

c. Any unsafe operation of the sled either on or off the track
will be just cause for disciplinary action from the WPI sled
board.
d. The use of cell phone for any reason ( talk, text, photos or
video) during a competition run down the track is strictly
prohibited
e. Disciplinary action from the WPI sled board may be or
include probation, suspensions or fines. (Action shall be
determined by Appeals Board.)



Expired Roll Cage Sticker

Quesion:
Can I run my tractor with an expired roll cage sticker?
Answer: 
Yes as long as the old sticker is still in place. The Techs know (becuase they have been told in tech school) that you can run until you find one of the roll cage inspectors.

Open SS EFI ???

Question:
Mr. Richwine,
I thought NTPA didn't allow electronic fuel injection, but, I see the lessons learned tractor won the Open Super Stock class at Wellington, OH. So, how can that be?

Answer:
NTPA doesn't allow EFI, you are correct but, the Gettinger family took the EFI off the tractor cause they have been fighting it over a year.
Looked like the "Lessons Learned" tractor prefers NOT to be EFI. It ran very good on mechanical fuel injection.

Hitch Question

Question:

Mr. Richwine,

What’s the deal with the new “V” hitch I’ve heard about for Mini rods? Are they legal? Are they gona be allowed in all classes? Asking for a friend.

Answer:

No, they aren’t legal the rulebook states in general rules as well as some class rules that nothing can obstruct the chain or the hooking or unhooking of it. The “V” cut design not only would cause difficulty in hooking (if not straight with the sled) but would also make unhooking harder than it already is. Also, when the hook tries to go from side to side when the vehicle gets sideways it will affect the angle of the hook and change the draft of the chain.

The cross sectional thickness of the point of hook is also spelled out in the rulebook for all classes. This too can affect the hook and the draft of the chain.
Drawbar Design

Mini rod engine / bore spacing

Question:
Richwine:
Is there a bore spacing limit for a V8 in the mini rod division like the Mod FWD class? I've heard of some "big engines" coming down the road.

Answer:
That rule was written like the Modified and TWD rules when it talks about "automotive" engine. The word "automotive" seems to have been dropped from the current wording but, the 575 blown/ 650NA cubic in engine was automotive when this was written and I'll make sure it is clarified for the next printing of the book.
When you look in "General rules" page 24 of the 2018 NTPA book it states:
 3. Automotive engine is any engine or its replica available in a passenger car. Maximum of (8) cylinders.
A replica to be considered legal must accept and swing a stock crankshaft.
Maximum supercharger size: 14-71, 19-inch rotor case length, 11.25-inch rotor case width. Helix restricted to a maximum rotor spiral of 6.5 degrees per inch of rotor length. Variable multi-speed supercharger devices prohibited.
With that being said, the engine in a MiniRod tractor couldn't have a bore spacing larger than anything mass produced for the OEM automotive market because of the stock crankshaft rule.

3.0 Diesel truck rules

Question:

Larry,

I have a couple questions about the 3.0 Limited Pro Stock Diesel Truck class

Are you running 7800 or 8000 lbs for 2018?

Do we have to have a full bed floor or can we cut it out and have a tonneau or like covering?

Answer:

When the rulebook was printed we were told the “other” group was changing the 3.0 class to 7800, but, they didn’t wind up changing the weight.
So, NTPA will run the 3.0 Diesel class at 8000 lbs for 2018.

As for the truck bed floor, yes, you can cut the floor out as long as you have a bed cover.

Super Farm Turbo

Question:

Richwine what’s this BS about all these so called “illegal turbos” in the super farm class at Louisville? Hell, I heard you weren’t even there but was called and you said they were Illegal over the phone. Please explain how you knew from Indianapolis that stuff in KY was wrong.

Answer:

Turbo big MWEFirst, you’re right I wasn’t there but, was called and consulted about a turbo that doesn’t fit the .200 MWE groove rule of Super Farm.

The rule reads on page 57 of the 2018 NTPA rulebook:

5. Turbo
a. Exhaust bolt pattern no larger than 2.750 inches x 3.5 inches, or 69 mm. x 88 mm.
b. No altering of a housing to accommodate a smaller base; e.g., T-18A95 with a small base welded to it.
Intake:
1. Map width enhancement is allowed. Maximum map width limit of .200”. MWE groove must be inside neck area where intake covered is measured at 3 inches.
2. Compressor wheel must protrude into the three inch opening at least 1/8 inch.
3. Intake housing to be no larger than three inches at the face of the wheel.

This turbo was clearly larger than the .200 MWE groove. We use a “go / no go” gauge to measure this, It’s similar to a .202 ball bearing and it falls right thru the opening and into the wheel. Therefore it’s illegal.

Here’s a drawing that shows where the MWE groove is measured:
SF Turbo

Component Limited or Light Pro Stock

Question:

Larry,
I heard a rumor NTPA was going make Limited and Light Pro Stock go to a Component Chassis. 

Answer:

No. At this time NTPA does not feel the need to make that change. Only tractor classes that allow a component chassis is Super Stock, Pro Stock (Heavy) and Modified. It was even an agenda item by some in the Light Pro Stock class it didn't get much support during the September meeting, and was voted no. A change as such would only happen in September after a rules meeting.

Second hitch

Question:

Larry,
Do I need a second hitch to pull at Cloverdale?

Answer:

No, NTPA doesn't use a second hitch at anytime, even indoors.

Tech School

Question:

Mr. Richwine,
Can anyone attend the tech school or do you have to be one of the "Click" to attend??

Answer:

The school is open for anyone to set in on but, in order to take the test and become a NTPA licensed official you must be endorsed by either a NTPA member state or by the NTPA itself.

Silly little rules

Question:

Richwine,
What’s this Bull Sh_t (silly little rule) that Larry Koester didn’t get a repull when his kill switch was pulled?Was he not on the list of “favored pullers” I would think his sponsor and he would be on your list of “elite”
Asking for a friend.

Answer:

First, there are no “favored pullers” with me or the officials that worked the event at Bowling Green.

Second, the rule says that if the killswitch tie is not broken they don’t get a repull. As a matter of fact this happened 3 times at BG this weekend (two on North track and one on the south) all in different classes and three different sleds. And the official’s call was the same.

2017 NTPA rulebook general rules pg 36 reads:

8. Kill switch ring must be secured with a single nylon tie wrap (1/8-inch). The tie wrap must be broken for a repull. Competitor will be responsible for replacing the kill switch mechanism and securing the tie wrap once kill switch is checked by tech official.

9. If vehicle has a kill switch or shutoff located in legal position, and during the pull it is pulled and the nylon strap is broken and the presiding official inspects and finds switch capable of operating properly under normal conditions, the vehicle will be allowed to re-pull immediately or drop six positions. The decision to drop must be made before the vehicle leaves the track. It is the competitor’s responsibility to see that the switch

BTW, this rule has been in place since NTPA required a killswitch in the early days.

While I agree it sucked for these competitors that it happened to, if the tie is fastened "tight" the tie has to break in order to pull the killswitch. The ties we use are not a "Lowes or hardware store" wire tie. They are a "18lb" test wire tie that NTPA uses. They are/have been bought at the same place (10,000 per year) for over 25 years.

New SF turbo 3"charger

Question:

Mr. Richwine,

I hear that Hart has a new 3" charger that measures a fuzz over 3 inches.It was allowed to run last weekend in NC at a non NTPA event. Will that be allowed to run at a UPOC event? If so what's the limit?

Answer:

I heard about the new turbo and have had a couple of calls already. I can assure you that NTPA won't allow that and if they are found to be on a tractor at a NTPA event, they won't be allowed to run or if they are found to have run after the fact the tractor will be DQ'd.As luck would have it, I will be at Pinetops and Benson and will make sure the SF chargers are checked.

Mounting OEM Rollcage

Question:

Hey Richwine,
I’m new to NTPA and I can’t find the rollcage mounting spec anywhere in the rulebook. I have a D-21 and need to mount an AccuFeed cage to it. Where is it and what do I need to do?

Answer:

The Rollcage spec is a SFI 47.1, that’s all that’s listed in the book. The mounting to a OEM chassis is as follows:

Mounting must use at least 3 axle housing bolts on each side as well as 1 bolt before and after the axle housing. There bolts must be in sheer (horizontal ) with a total of 2 9/16” bolt material. 
mounting cage

W F O

Question:

What does WFO stand for?


Answer:
There are many schools of thought on that. The Bauer Team are the ones to really ask.

Here are some of the meanings that I've heard:

1. Whole Family Operation
2. World Family Out reach
3. Wide Friggin Open

Rollcage Webbing

Question:
Mr. Richwine,

I am building a Mini Rod and have a question about the webbing between the upright tubes? Can they be lightened? If so, how much? I have included a photo of the chassis that is available and they look like they have been lightened a lot.
webbing

Answer:
Yes the shear webbing that goes between the up tubes can be lightened by 40%.
The Spec says: shear web may have lightening holes but must retain 60% material and must have a minimum of 1 inch around the perimeter of the web on all four sides. This applies to both Mini Rods and Big Tractor rollcages.
After looking at the photo you are correct this will not pass the SFI / NTPA inspection and will have to be corrected before they are allowed to compete with NTPA.

New tires

Question:
Richwine, How big can of a tire can I use in the Super farm class? These new tires that are out are pretty big.
What if I buy a pair and they measure 212-214 inches?
The guy selling them that they are ok but, I don’t wanta get throw out if I show up with them.

Answer:
The rule reads:
24.5 x 32 with a maximum of 210-inch circumference, when inflated to 10 psi. Tread width not to exceed 25 inches.

I realize that after hardening, over inflation and use they will stretch some but, if we measure your tires when they are relatively new and they’re to big, you would be allowed to run that day but told not to come back till you have tires that fit the rule…….

Bottom line is make sure you get tires that are legal.

Rollcages in New York

Question:

Mr. Richwine,
I'm not a mamber of NTPA but, would like to run at the upcoming event in New York. I need to get my cage inspected, is there a charge for that?

Answer:
Here's the program that's been in place since 1999 when the cage was implemented.
All vehicles that compete at a NTPA event must have the rollcage inspected and display a NTPA/SFI certification sticker or the vehicle will not be allowed to hook.

1. Upon passing inspection and paying the fee of $75.00 per cage to NTPA on vehicles that have a paid NTPA membership. The rollcage will have a certification sticker applied to it that denotes the inspection date, it will be valid for a period of five (5) years before being required to have their rollcage reinspected. Unless an accident occurs that involves the rollcage.
2. A service fee of $100.00 will be added to a cage that is on a non NTPA member vehicle. This $100.00 fee will be applied to a regular membership (not per hook) if the vehicle joins NTPA within a 60 day period from the date of inspection.


Contact Info

ADDRESS:
National Tractor Pullers Association
6155-B Huntley Road,
Columbus, OH 43229


PHONE: (614) 436-1761

FAX: (614) 436-0964