12.90 Index Set ups

 

This page was designed for all of those struggling with the 12.90 index class.

We have also asked some of our 12.90 friends to submit their input and we would like to thank them for this information.
Travis was in this group for 2 years and we found it very difficult to go from always trying to go faster with his brother Brian to slowing his car so it was with in the age defined limits of IHRA and NHRA.

• Robert - Texas:
  275 lb car, stoke bore, stock stoke no porting. 340 Salsbury Clutch, 3,500 RPM stall, 12 / 86 Gear, 19” tire, 6,000 – 6,200 Peak RPM, 12.80 – 13.20, 28 mm Mikuni, 55 – 65 pilot, 390 – 400 main, with .9 to 1.0 air
• Trouble Maker - Haiwii:
  1. Stock stroke 360 lift dyno cam, 4” taper manifold, 18 mm carb, Salsbury clutch, 7” Driven , 14 / 82 Gear, American Racer Tires, Total weight combo 265 lbs 28 mm carb
  2. 14/90 gear, 18 mm carb, E.T average 12.80 – 12.85, Average MPH 50, RPM 5,300 – 5,500
• Travis Maine - Chesapeake, VA :
  28 mm carb, Air jet 1.3, 440 main, 20 pilot, Salsbury clutch, 3,500 RPM stall, 11 / 80 Gearing, 7.27 to 1 ratio.
• Bill - Georgia:
  Stall 3,900 18 mm—jetting 180 main, 55 pilot
• Jay:
  Gears 20 / 73, Average of 12.98—13.00, Average 56 MPH
• Swain Racing:
  Salsbury 330, 3,200 stall, Tall Good Year, 320 weight combo, 13/92 Gear 357 Tillison, Best 12.75 Consistent 12.90
• Mark - Ohio:
  Polar clutch, 4,100 stall 12/88 Gear, Best E.T 13.10, Best 46 MPH
• Kevin - Fayetteville, NC:
  TAV clutch, 4,000 stall, 19" Good Year Tires, Weight 330 lbs combo, Gear 12/80, Carb Briggs on alcohol, Best ET 13.14 Best MPH 45