Page 428 - 2021-22 Auto Performance_Circle Track
P. 428
UMP/Late Model/E-Mod/Street Stock Dirt Tires
Part No.
HOO36021 NEW! HOO36022 NEW! HOO36180M30S HOO36180M60 HOO36190M30S HOO36190M60
G60
Dia.
25.5" 26.0" 26.5" 26.5" 27.5"
Circ. Rim
81.0" 8" 82.0" 8" 83.2" 8-9" .83.0" 8"-9" 86.3" 8-9"
Rim Width
8" 10.75" 8" 10.75" 8" 11.0"
Compound
D40 (Soft) D40 (Soft) D40 (Soft)
Tire Size
G60-15
G60-15
26.5/8.0-15 SuperChainLink
26.5/ 8.0-15 Chain Link 27.5/8.0-15 SuperChainLink
26.5/ 8.0-15 Chain Link
Tread Pattern
G60
Tread Width
8.5" 8.5" 8.0" 8.0" 8.0" 8.0"
Approx. Approx. Recom. Measured Section
UMP Dirt Late Model Tires
27.25" 85.5" 8"-9"
Approx. Approx. Dia. Circ.
28.0" 87.5" 28.0" 87.5" 28.5" 88.0" 28.5" 88.0" 28.5" 88.0" 29.0" 92.0" 29.0" 92.0" 29.0" 92.0"
8"
Recom. Rim
12-14" 12-14" 12-14" 12-14" 12-14" 12-14" 12-14" 12-14"
Part No.
HOO36617M20 HOO36617M40 HOO36627M20 HOO36627M30S HOO36627M40 HOO36637M20 HOO36637M30S HOO36637M40
Tire Size
88.0/11.0-15 88.0/11.0-15 90.0/11.0-15 90.0/11.0-15 90.0/11.0-15 92.0/11.0-15 92.0/11.0-15 92.0/11.0-15
Tread Tread Pattern Width
Crossblock 11.0" Crossblock 11.0" Crossblock 11.0" Crossblock 11.0" Crossblock 11.0" Crossblock 11.0" Crossblock 11.0" Crossblock 11.0"
11.2" (Hard) 11.2" (Hard)
Compound
M20 (Soft) M40 (Med.-Hard) M20 (Soft) M30S (Medium) M40 (Med.-Hard) M20 (Soft) M30S (Medium) M40 (Med.-Hard)
8"
8" 11.2" D40 (Soft)
Asphalt Quarter Midget Tires
Hoosier’s A35 utilizes a high-traction compound that works well on tracks that lack grip, such as colder, slick, or “green” track surfaces. The A35 will grip quickly with little heat and will be consistent throughout long
Part No.
HOO15031A35 HOO15032A35 HOO15325A35 HOO15650A35
Tire Size
31.0/4.5-5 32.0/4.5-5 33.0/5.0-6 34.5/6.5-6
Tread Tread Pattern Width
bb 4.5" bb 4.5" bb 4.75" bb 6.25"
Approx. Dia.
10.0" 10.25" 10.5" 11.0"
Approx. Circ.
31"
32" 33.5" 34.75"
Recom. Measured Rim Rim
5-6" 5.5"
5-6" 5.5" 6-6.5" 6" 8-8.5" 8.5"
Section Width
Compound
5.5" A35
5.5" A35 6.25" A35 8.25" A35
Max Oval Racing Camshafts
Howards Cams offers a line of camshafts engineered for exceptional power out of the turns and on the straightaways. Standard or lift-rule hydraulic, mechanical, and roller camshafts for small block Chevys are available.
Part No.
Hydraulic Camshafts
HRC110091-06 HRC111241-12 HRC112681-12 HRC112691-06 HRC112711-06 Mechanical Camshafts HRC110812-06 HRC110822-06 HRC110922-06S* HRC111752-06 HRC112662-06
Roller Camshafts
HRC111163-06 HRC111133-06
Application
Lift Rule Hyd. Cam Hyd. Cam Lift Rule Lift Rule
Solid Cam Solid Cam Solid Cam Solid Cam Solid Cam
Roller Cam Roller Cam
Lifters
HRC91111 HRC91111 HRC91111 HRC91111 HRC91111
HRC91115 HRC91115 HRC91115 HRC91115 HRC91115
HRC91117 HRC91117
Valve Springs
HRC98214 HRC98214 HRC98214 HRC98214 HRC98214
HRC98212 HRC98212 HRC98212 HRC98212 HRC98212
HRC98441 HRC98441
RPM Range
3000-6400 2400-6400 2800-6800 2500-6600 3500-6800
2500-6500 3000-7200 3000-7200 3000-6800 3000-7000
2800-6800 3400-7000
Dur. @ .050" Int./Exh.
241°/241° 223°/231° 235°/237° 232°/232° 236°/242°
248°/252° 252°/260° 252°/260° 252°/261° 252°/264°
255°/262° 258°/268°
Valve Lift Sep. Int./Exh. with 1.5 Rocker Angle
.410"/.410" 106° .450"/.450" 112° .480"/.488" 106° .450"/.450" 106° .390"/.410" 106°
.535"/.540" 106° .540"/.560" 106° .540"/.560" 106° .525"/.525" 106° .545"/.555" 106°
.600"/.620" 106° .600"/.600" 106°
Valve Lash Int./Exh.
.000"/.000" .000"/.000" .000"/.000" .000"/.000" .000"/.000"
.016"/.016" .016"/.016" .016"/.016" .022"/.022" .022"/.022"
.022"/.022" .024"/.024"
Recommended Components
* “S” at the end of the part number signifies a small base circle camshaft.
426 TRACK
CIRCLE 2021-22
