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‘American 75/100’ Modified Rules

2016 ‘American 75/100’ Rules

“2016 Modified Car Rules”

 

ELIGIBLE MODELS

Any safe modified type race car with a wheel base between 104” – 110”

Maximum tread width 84” when measured at wheel bead

NO LIFTING ALLOWED

All 390 carburetors must meet VMRS rules

 

WEIGHT RULE

All total and left side weights are with driver strapped in seat before starting heat and feature.

A. ALUMINUM HEAD MOTORS 6.8 LBS. X cubic inch plus 175 lbs minimum total weight will be no less than 2575 lbs. 56% maximum left side weight. Max compression ration 12:1 for 18 degree motors only.

B. ANY NON PORTED steel cal head 6.8 X cubic inch plus 175 lbs -60 lbs. 2550 minimum. Any size carburetor allowed. 56% maximum left side weight.

C. ANY STEEL PORTED HEAD 6.8 x cubic inch plus 175 lbs – 50 lbs minimum weight 2600. Maximum 650 cfm carburetor only (ROC Specs) 56 maximum left side weight.

D. NASCAR Aluminum spec motor 55% max left side weight, 2,650 minimum weight

E. SK/SST Modified 6.8 X cubic inch plus 175 – 60 lbs. Minimum Weight 2500 lbs. 57 % maximum left side weight. Maximum 650 cfm carburetor only. No modifications other than removal of the choke tower.

F. SK Lite Modified 6.8 X cubic inch plus 175 – 60 lbs. Minimum Weight 2500 lbs. 56 % maximum left side weight. Maximum 650 cfm carburetor only. No modifications other than removal of the choke tower.

G. Non Quick Change Rear End will be allowed. Rear must be locked.

H. American Racer new spec tires only. No Tire Softener Allowed (tires will be impounded over night). For the 9/4/16 show: 5 NEW TIRE MAX – 4 new tires must be on each car for qualifying races, must be properly marked, and only 1 new change tire will be allowed (this is to deter any doctoring of tires that fall outside of our impounding process). All 5 eligible tires will then again be marked by tech prior to the feature event. Officials must be notified if damage requires additional used tires only. All rims must be marked with team # and impounded within one hour of requested time Saturday. For the 10/9/16 show: 6 NEW TIRE MAX – 4 new tires must be on each car for qualifying races, must be properly marked, and only 2 new change tires will be allowed (this is to deter any doctoring of tires that fall outside of our impounding process). All 6 eligible tires will then again be marked by tech prior to the feature event. Officials must be notified if damage requires additional used tires only. All rims must be marked with team # and impounded within one hour of requested time Saturday.

I. TRI-Y Headers allowed.

 

SPOILER HEIGHT / WIDTH

48.00 inches max width

8.00 inch max blade height must be clear lexan

A maximum height of 44.0 inches from the ground to the top of spoiler with driver

 

FUEL

Sunoco 112 /110 fuel only. samples will be tested randomly throughout the qualifying and main event.

All teams must declare engine style and size to be catagorized properly prior to competition.

 

NOTE: All rules subject to adjustment according to the American 75/100 Tech team. All decisions are final. Thank you for your participation.

Tire Spec –

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