---

Pro Mods by the Numbers - Power Adder, Weights & Rules

Pro Mod Series Rules Side by Side
With the Smack Down 2024 just around the corner and racers coming to the Mid-West Drag Racing Series for the first time, let’s take a look at the Pro Mod Class Weights/Rules in comparison to series around the country.

We collected the rules of the Pro Mod classes from PDRA, NMCA, YellowBullet Nationals, World Series of Pro Mod and Bradenton Motorsports Park. Over the next 4 weeks, racers of other series will make changes to their cars in preparation to race for the $150,000 Winner Purse, or their part of the $266,000 in Pro Mod Class Payouts!
With a few classes providing weight breaks over their current series, we expect racers to test in the days ahead of the event to guarantee they’re as prepared as possible for the biggest race of their career.

The Summit Racing Equipment Mid-West Drag Racing Series presents the SmackDown 2024 at Flying H Dragstrip September 19th-21st!
Do Not Miss this Event! Only a FEW Pro Mod Spots Left

Smack Down 2024 will run MWDRS Rules/Weights Below
Nitrous Big Block:
960ci & Bigger
MWDRS 2385lbs
PDRA 2440lbs plus 25lbs 4 speed Trans
WSOPM 2400lbs 25lbs 4 speed Trans
Bradenton 2400lbs 25lbs 4 speed Trans
NMCA 2400lbs
Cecil-Yellowbullet 2400lbs 25lbs 4 speed Trans

Roots Big Block:
MWDRS Hi-helix/ Roots 18-71 2525lbs minimum No overdrive limit - 5.0" bore space max, 25lbs 4 speed Trans, 25lbs Lock Up
PDRA (24% Max Overdrive) 2,550 lbs. 25lbs 4 speed Trans 50lbs, Lock Up
WSOPM 2,550 lbs. 25lbs 4 speed Trans, 50lbs Lock Up
Bradenton (24% Max Overdrive) 2,500 lbs. 25lbs 4 speed Trans 50lbs, Lock Up
NMCA 2500lbs 25lbs Lock Up
Cecil-Yellowbullet 2500lbs 25lbs 4 speed Trans 50lbs, Lock Up

Screw (C-rotor) Big Block Combo:
MWDRS 70% overdrive max 2400lbs minimum
NMCA 70% overdrive max 2400lbs
PDRA, WSOPM doesn’t have nor does Bradenton have combo
MWDRS 75% overdrive max allowed for 3 speed transmission 2475lbs minimum, 25lbs Lock Up
NMCA 75% overdrive max 2450lbs 25lbs Lock Up
Cecil-Yellowbullet 75% overdrive max 2575lbs 25lbs 4 speed Trans 50lbs, Lock Up
PDRA doesn’t have nor does Bradenton have combo
WSOPM 75% overdrive max 2575lbs. 25lbs 4 speed Trans, 50lbs Lock Up
MWDRS 92% overdrive max 2625lbs minimum Add 25lbs for 4.9 bore space, 25lbs 4 speed Trans, 25lbs Lock Up
PDRA 92% Max Overdrive 2,620 lbs. 25lbs 4 speed Trans, 50lbs Lock Up
WSOPM 92% overdrive max 2675lbs 25lbs 4 speed Trans, 50lbs Lock Up
Bradenton 92% overdrive max 2,650 lbs. 25lbs 4 speed Trans 50lbs, Lock Up
NMCA 92% overdrive max 2650lbs 25lbs Lock Up
Cecil-Yellowbullet 92% overdrive max 2675lbs 25lbs 4 speed Trans 50lbs, Lock Up

Centrifugal Supercharger:
MWDRS 5.0 bore space max 526-599 CID 140mm Max Centrifugal 2600lbs. minimum 25lbs 4 speed Trans, 25lbs Lock Up, Deduct 100lbs for 136mm centrifugal supercharger
PDRA 2585lbs 25lbs 4 speed Trans, 50lbs Lock Up, Deduct 50lbs for 136mm centrifugal supercharger
WSOPM 2615lbs 25lbs 4 speed Trans, 50lbs Lock Up
Bradenton 2,600 lbs. 25lbs 4 speed Trans 50lbs, Lock Up
NMCA 2600lbs 25lbs Lock Up.
Cecil-Yellowbullet 2615lbs 25lbs 4 speed Trans 50lbs, Lock Up

All has Add 50lbs for Centrifugal Supercharger Big block combination

Twin Turbo Big Block:
MWDRS 5.0" bore space 88mm max 2500lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up, Stepped compressor wheel (Not Allowed)
PDRA 5.0" bore space 88mm max 2565lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up allows Stepped compressor wheel 100lbs
WSOPM 88mm max 2540lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up allows Stepped compressor wheel 75lbs
Bradenton 88mm max 2500lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up allows Stepped compressor wheel 75lbs
NMCA 88mm max 2500lbs minimum 25lbs Lock Up allows Stepped compressor wheel 0lbs
Cecil-Yellowbullet doesn’t have
5.0” bore space 94mm max 2550lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up, Stepped compressor wheel (Not Allowed), 25lbs for 4.9 Bore space, 50lbs for 5.3 bore space
NMCA 94mm max 2550lbs minimum 25lbs Lock Up allows Stepped compressor wheel 0lbs
PDRA, WSOPM, Cecil-Yellowbullet doesn’t have nor does Bradenton have combo
MWDRS 5.0” bore space 98mm max 2625lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up, Stepped compressor wheel (Not Allowed)
PDRA 5.0" bore space 98mm max 2665lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up allows Stepped compressor wheel not allowed
WSOPM 5.0" bore space 98mm max 2665lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up allows Stepped compressor wheel 75lbs, 25lbs for 4.9 Bore space
Bradenton 98mm max 2600lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up allows Stepped compressor wheel 75lbs
NMCA 98mm max 2600lbs minimum 25lbs Lock Up allows Stepped compressor wheel 0lbs
Cecil-Yellowbullet 98mm max 2665lbs minimum 25lbs 4 speed Trans, 50lbs Lock Up Stepped compressor wheel (Not Allowed)

MWDRS ONLY HAS THIS RULE:
Recirculation slot (MAP Groove) may be a maximum of .3125 inches and leading edge of slot must be within .625 inches of the tip (front) of the compressor wheel blade. Contour of the compressor blade from inducer to exducer must have a continuous radiused shape with no sharp angle changes. Exotic designed turbos prohibited.

(No test or prototype of any kind allowed)

Most all series have a 4.9 Hemi rule adding weight

---

Back to News