[Bench Racer]

CLASSES LBS. PER CUBIC INCH Class AC .............15.00 to 16.49 Ibs. Per cubic inch, includes rotary engines.

Class BC .............16.50 or more pounds per cubic inch Class CC .............18.50 or more Ibs. Per cubic inch, American production, front engine.

Class DC .............15.00 to 17.99 Ibs. Per cubic inch, 4-or 6-cyl. Front wheel drive only.

Class EC .............18.00 or more Ibs. Per cubic inch, 4-cyl. Front wheel drive only.

Class FC ..............For 4-cyl. American built cars with a maximum displacement of 165 cu. In. Minimum weight with driver is 2,400 Ibs. For automatic and 2,500 for manual transmissions.

ENGINE

CARBURETION: A through F: Any carburetion or fuel injection may be used; 6-cylinder in D class limited to 4-bbl American production carb, 600 cfm maximum accepted by IHRA.

ENGINE: Must be same engine as originally equipped; 155 or less in A, B, C, 230 c.i. or less (original production) in D and E with stock production head for original engine; D and E limited to steel valves. May have two camshafts in original location, maximum four valves per cylinder. Any other internal modifications allowed; D and E limited to stock stroke and flat tappet or stock cam followers only. Dry sump oil system permitted. Dualport VW heads permitted on any year VW engine. Rotaries are classified at 2.2 times advertised cubic inches. Displacement determined by rotor housing width. No peripheral port engines. Class F Corporate engines permitted. Balancing, porting, polishing and sleeving of engines allowed. Engine block and cylinder heads must be OEM or over-thecounter items offered by the original manufacturer with unaltered casting numbers and accepted by IHRA. The use of a cast iron harmonic balancer is prohibited. Units meeting SFI Spec 18.1 mandatory.

Just found this from the IHRA rule book. SS/FC corporate engines permitted. The original engine was 97ci, think the Duke was 151. I didn't think that 97 incher would run that good with a bottle hid somewhere lol. IHRA list the SS/FC index as a 12.55. I remember hearing rumors in the pits that he had a block of wood under the throttle to slow it down, don't know if that was true or not. Don Jackson