Classes

[JSLRacing]

Can someone please create a sticky with the factors/indexes and classes for those that don't have a rule book..

I would love it if it covered IHRA as well as NHRA..

It would save me from asking all the time.

[Mike Carr]

IHRA Super Stock Indexes
http://www.ihra.com/downloads/pdf/co...ss_indexes.pdf

IHRA Stock Indexes
http://www.ihra.com/downloads/pdf/co...ck_indexes.pdf

NHRA Super Stock Indexes
http://www.nhra.net/stats/indexes_ss.html

NHRA Stock Indexes
http://www.nhra.com/competition/classindexs.aspx

I will work on the weight breaks here soon. Ken, you can modify and stick this, if you wish.

[JSLRacing]

The problem I have is not knowing what factors go with which class..

If it comes out to 19.32 ( for instance).. there isn't a place other than the rulebook to find out what index to run.

[Mike Carr]

NHRA Super Stock (IHRA are the same for these)
SS/AH 6.00 (only 1968 Hemi Cudas and Darts in this class in NHRA; sticks and autos run together)
SS/A 6.00-6.49
SS/B 6.50-6.99
SS/C 7.00-7.49
SS/D 7.50-7.99
SS/E 8.00-8.49
SS/F 8.50-8.99
SS/G 9.00-9.49
SS/H 9.50-9.99
SS/I 10.00-10.99
SS/J 11.00-11.99
SS/K 12.00-12.99
SS/L 13.00-13.99
SS/M 14.00-14.99
SS/N 15.00-15.99
SS/O 16.00-16.99
SS/P 17.00 and more

NHRA SS/GT (IHRA are the same for these)
GT/A 8.00-8.49
GT/B 8.50-8.99
GT/C 9.00-9.49
GT/D 9.50-9.99
GT/E 10.00-10.49
GT/F 10.50-10.99
GT/G 11.00-11.49
GT/H 11.50-11.99
GT/I 12.00-12.49
GT/J 12.50-12.99
GT/K 13.00-13.49
GT/L 13.50-13.99
GT/M 14.00 and more

NHRA GT Truck (IHRA are the same)
GT/TA 9.50-10.49
GT/TB 10.50-11.49
GT/TC 11.50-12.49
GT/TD 12.50 and more

SS/Modified Stock (IHRA only goes to SS/DS)
SS/AS 8.50-9.49 pounds per cid
SS/BS 9.50-10.49
SS/CS 10.50 or more
SS/DS 12 pounds or more; V6 only
SS/ES 15.50 or more, 4 cyl only, max 165 cid
SS/FS 16.50 or more, 155 cid max
SS/GS 18 pounds or more; 4 cly, FWD only, max 230 cid

SS/Modified Truck (IHRA are the same)
Four clases
SS/TA through SS/TD weight breaks mirror SS/AS through SS/DS

Super Stock Modified (IHRA are the same)
SS/AM 7.50-8.49 pounds per cid
SS/BM 8.50-9.49
SS/CM 9.50-10.49
SS/DM 10.50-11.49
SS/EM 11.50-12.49
SS/FM 12.50-13.49
SS/GM 10.50 or more pounds; non-supercharged inline 4 or 6 cylinder and straight 8
11.00 or more pounds, non-supercharged American factory controlled V6

Super Stock Modified X (IHRA are the same)
No V8's allowed in SS/MX
SS/AX 8.50-10.99 pounds per cid
SS/BX 11.00-12.49
SS/CX 12.50 or more
SS/DX 15.00 pounds or more; two turbochargers or OEM supercharger

NHRA Stock Eliminator (IHRA is the same, except where noted)
AA/S 7.50-7.99 (IHRA is 7.00-7.99)
A/S 8.00-8.49
B/S 8.50-8.99
C/S 9.00-9.49
D/S 9.50-9.99
E/S 10.00-10.49
F/S 10.50-10.99
G/S 11.00-11.49
H/S 11.50-11.99
I/S 12.00-12.49
J/S 12.50-12.99
K/S 13.00-13.49
L/S 13.50-13.99
M/S 14.00-14.49
N/S 14.50-14.99
O/S 15.00-15.99
P/S 16.00-16.00
Q/S 17.00-17.99
R/S 18.00-18.99
T/S 19.00-19.99
U/S 20.00 or more (IHRA 20.00-21.99)
V/S 22.00 or more
W/S 24.00 or more

AF/S 13.00-15.99
BF/S 16.00-17.49
CF/S 17.50-18.99
DF/S 19.00-24.99
EF/S 25.oo or more
(sticks and autos run together' stickshift carries a 100 pound penalty in NHRA FWD Stock)

[JSLRacing]

That is exactly what I needed.. thank you very much!!!!

[D.Heerdt]

great info mike. thanks for the post. this should be sticky'd , for us new guys lookin to get involved.

[Mike Carr]

NHRA and IHRA Stock and Super Stock weight breaks

-All classes, except where noted, have separate Stick and Automatic Classes. Some classes offer a weight break to the automatic, 5% or 250 pounds, whichever is LESS. Check the Rulebook for your class and sanctioning body
-All cars are pounds per NHRA/IHRA-rated horsepower, or factory rated horsepower, unless noted
-All cars can move weight to go up or down a class from their natural class.
-Example, a car with a weight break that fits it into F/SA naturally, can also run E/SA and G/SA


NHRA Super Stock (IHRA are the same for these)

SS/AH 6.00 (NHRA, only 1968 Hemi Barracudas and Darts can run this class, and is their only class. Sticks and autos run together)
SS/A 6.00-6.49
SS/B 6.50-6.99
SS/C 7.00-7.49
SS/D 7.50-7.99
SS/E 8.00-8.49
SS/F 8.50-8.99
SS/G 9.00-9.49
SS/H 9.50-9.99
SS/I 10.00-10.99
SS/J 11.00-11.99
SS/K 12.00-12.99
SS/L 13.00-13.99
SS/M 14.00-14.99
SS/N 15.00-15.99
SS/O 16.00-16.99
SS/P 17.00 and more

NHRA SS/GT (IHRA are the same for these)
GT/A 8.00-8.49
GT/B 8.50-8.99
GT/C 9.00-9.49
GT/D 9.50-9.99
GT/E 10.00-10.49
GT/F 10.50-10.99
GT/G 11.00-11.49
GT/H 11.50-11.99
GT/I 12.00-12.49
GT/J 12.50-12.99
GT/K 13.00-13.49
GT/L 13.50-13.99
GT/M 14.00 and more

NHRA GT Truck (IHRA are the same)
Sticks and autos run together
GT/TA 9.50-10.49
GT/TB 10.50-11.49
GT/TC 11.50-12.49
GT/TD 12.50 and more

SS/Modified Stock (IHRA only goes to SS/DS)
Sticks and Autos run together
SS/AS 8.50-9.49 pounds per cid
SS/BS 9.50-10.49
SS/CS 10.50 or more
SS/DS 12 pounds or more; V6 only
SS/ES 15.50 or more, 4 cyl only, max 165 cid
SS/FS 16.50 or more, 155 cid max
SS/GS 18 pounds or more; 4 cly, FWD only, max 230 cid

SS/Modified Truck (IHRA are the same)
Four clases; sticks and autos run together
SS/TA through SS/TD weight breaks mirror SS/AS through SS/DS

Super Stock Modified (IHRA are the same)
Sticks and Autos run together
SS/AM 7.50-8.49 pounds per cid
SS/BM 8.50-9.49
SS/CM 9.50-10.49
SS/DM 10.50-11.49
SS/EM 11.50-12.49
SS/FM 12.50-13.49
SS/GM 10.50 or more pounds; non-supercharged inline 4 or 6 cylinder and straight 8
11.00 or more pounds, non-supercharged American factory controlled V6

Super Stock Modified X (IHRA are the same)
No V8's allowed in SS/MX; sticks and autos together
SS/AX 8.50-10.99 pounds per cid
SS/BX 11.00-12.49
SS/CX 12.50 or more
SS/DX 15.00 pounds or more; two turbochargers or OEM supercharger

NHRA Stock Eliminator (IHRA is the same, except where noted)
AA/S 7.50-7.99 (IHRA is 7.00-7.99)
A/S 8.00-8.49
B/S 8.50-8.99
C/S 9.00-9.49
D/S 9.50-9.99
E/S 10.00-10.49
F/S 10.50-10.99
G/S 11.00-11.49
H/S 11.50-11.99
I/S 12.00-12.49
J/S 12.50-12.99
K/S 13.00-13.49
L/S 13.50-13.99
M/S 14.00-14.49
N/S 14.50-14.99
O/S 15.00-15.99
P/S 16.00-16.00
Q/S 17.00-17.99
R/S 18.00-18.99
T/S 19.00-19.99
U/S 20.00 or more (IHRA 20.00-21.99)
V/S 22.00 or more (NHRA, only 4 and 6 cylinder eligible for V)
W/S 24.00 or more (NHRA, only 4 cylinders eligible for W)

AF/S 13.00-15.99
BF/S 16.00-17.49
CF/S 17.50-18.99
DF/S 19.00-24.99
EF/S 25.oo or more
(sticks and autos run together; stick shift carries a 100 pound penalty in NHRA FWD Stock)

IHRA Weight breaks, for IHRA-only Classes
Super Stock Production (either a single 4 bbl or single 2 bbl carb is permitted)
SS/PA 7.00-7.49 pounds per cid
SS/PB 7.50-7.99
SS/PC 8.00-8.49
SS/PD 8.50-8.99
SS/PE 9.00-9.49
SS/PF 9.50-9.99
SS/PG 10.00-10.99
SS/PH 11.00-11.99
SS/PI 12.00-12.99
SS/PJ 13.00 or more

SS/Modified Compact
Sticks and autos run together
SS/AC 15.00-16.49 pounds per cid; includes rotary engines
SS/BC16.50 or more
SS/CC 18.50 or more; American production front engine
SS/DC 15.00-17.99; 4 or 6 cylinder FWD
SS/EC 18.00 or more; 4 cyl FWD only
SS/FC 4 cyl, 165 cid or less; 2400 pounds auto, 2500 pounds stick

SS/Fuel Injected Modified
Sticks and Autos run together
SS/AFI 7.50-8.49 pounds per cid
SS/BFI 8.50-9.49
SS/CFI 9.50-10.49

Stock FWD
Sticks and autos have their own classes in IHRA
AF/S 13.00-15.99
BF/S 16.00-16.99
CF/S 17.00-17.99
DF/S 18.00-18.99
EF/S 19.00-19.99
FF/S 20.00-23.49
GF/S 23.50-27.49
HF/S 27.50 or more

Stock FI
AA/FI 7.50-7.99 Only 2008 and newer factory muscle cars are eligible.
A/FI 8.00-8.99
B/FI 9.00-9.99
C/FI 10.00-10.99
DF/I 11.00-11.99
EF/I 12.00-12.99
FF/I 13.00-13.99
G/FI 14.00-14.99
H/FI 15.00-15.99
I/FI 16.00-17.99
J/FI 18.00-19.99
K/FI 20.00-21.99
L/FI 22.00-23.99
M/FI 24.00

Stock Trucks
1980 and newer, 1/2 ton or mini trucks only. Four wheel drive combinations prohibited. Class A and B restricted to all wheel drive. Classes C through J restricted to two wheel drive. Class J restricted to 4 cylinders only. Kind of sounds like two different things--no 4 wheel drives, but the class is restricted to all wheel drive?? It's in the rulebook.
AT/S 12.00-12.99
BT/S 13.00-13.99
CT/S 12.00-12.99
DT/S 13.00-13.99
ET/S 14.00-14.99
FT/S 15.00-15.99
GT/S 16.00-17.99
HT/S 18.00 or more
IT/S 20.00-21.99
JT/S 22.00 or more

Stock GT
1980 and newer cars, with engines from 1955-1979; sticks and auto's run together
S/GTA 8.00-8.99
S/GTB 9.00-9.99
S/GTC 10.00-10.99
S/GTD 11.00-11.99
S/GTE 12.00-12.99
S/GTF 13.00-13.99
S/GTG 14.00 or more

Pure Stock
No supercharged or turbocharged cars permitted; sticks and autos run together
A/PS 8.00-8.99
B/PS 9.00-9.99
C/PS 10.00-10.99
D/PS 11.00-11.99
E/PS 12.00-12.99
F/PS 13.00-13.99
G/PS 14.00-14.99
H/PS 15.00-15.99
I/PS 16.00-16.99

Stock Crate Motor
1955 and newer cars and 1/2 ton trucks; sticks and autos run together
A/CM 6.00-6.49
B/CM 6.50-6.99
C/CM 7.00-7.49
D/CM 7.50-7.99
E/CM 8.00-8.49
F/CM 8.50-8.99
G/CM 9.00-9.49
H/CM 9.50-9.99
I/CM 10.00-10.49
J/CM 10.50-10.99
K/CM 11.00-11.49
L/CM 11.50-11.99
M/CM 12.00-12.49

A/FCM 9.00-9.99
B/FCM 10.00-10.99
C/FCM 11.00-11.99