Classes
 

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.

Re: Classes
 

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.

Re: Classes
 

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.

Re: Classes
 

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)

Re: Classes
 

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

Re: Classes
 

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

Re: Classes
 

Just pull out the extra stuff and just sticky the info Mike posted

Re: Classes
 

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

Re: Classes
 

Kenny, if you wish to start a new thread and stick this, I will combine all my posts into one, so it's easier.

Re: Classes
 

I think that would be a good idea Mike. Hope Ken does this. Thanks.

Re: Classes
 

Dumba%^ moment here. I've seen these classes listed in the IHRA rulebook. What is the difference between these and the regular CM classes? Are these fuel injected crate motors or what?

Robert Swartz

Re: Classes
 

No...These are FWD conversions with an accepted crate engine similar to SS/GT rules except use smaller tires and suspensions more in line with stock. It wasnt one of my better ideas.....lol. Very few were ever built.

Re: Classes
 

Terry,

Thank you for the clarification. I knew that front wheel drive conversions were allowed in CM. Didn't know they were classed differently. Now I understand. Similar to Stock GT, these could be mini-tubbed and allowed a "modified" rear suspension, ladder bars, no four links, LOL! I wager they would be expensive to build and other than bracket racing, no cross over possibilities.

That's the difference with a conventional CM car. I have some options, could build an NHRA motor in the future.

Sorry to the original poster for hi-jacking the thread.

Robert Swartz

Re: Classes
 

The engines allowed are SMALL BLOCKS only. NO big blocks.

Re: Classes
 

http://classracer.com/classes.html

Located in the Site Navigation section on here.

Re: Classes
 

Thanks Mike and Class Racer....I hope this helps those racers who are interested in the differences between the two associations.

Re: Classes
 

that is great... getting information to the racers is the best way to get them started..

Re: Classes
 

Great Job Mike. But you need to add SS/EX 11.5 per cu/in, FWD,N/A, Methanol

Re: Classes
 

Mike you may wish to add a note on your weight break post that V is restricted to 4 and 6 cylidner only cars, W is 4 cylinder only.

JSLR, basically what that means is in NHRA if the car is an 8 cylinder car above 20, it will have to run in U even if the NHRA rating is let's say 23.25.

Re: Classes
 

Oops. I had mentioned that in post #8 in this thread but hadn't wrote it in the maser copy that I sent Ken. I will rectify it.

Re: Classes
 

Mike this is an NHRA class. Not a Joke. Scott Kelly runs a car in it

Re: Classes
 

I know, the really cool Scion boxy car. Pretty quick, too. I sent the updatd list to Ken to post, with the SS/EX class and the U/SA V/SA NHRA notes.

Re: Classes
 

That is Scott KELLEY ! :-)