IHRA classification guide
 

Does IHRA have classification guide and or current HP available online for stock? Found HP corrections only. Thanks, Ron.

Re: IHRA classification guide
 

To the best of my knowledge, no they don't. I believe they follow the NHRA classification and HP, with some exceptions. For example, the '93-'98 LT-1 is rated 279 in NHRA S/S, and still at 275 in IHRA. IHRA allows pre-1960 cars in Stock, NHRA does not. IHRA also has some different classes not offered in NHRA (Crate Motor Stock, Stock GT, Pure Stock, Super Stock Production, as well as seperate Truck, EFI classes and more FWD Stock classes). Some HP ratings will differ. On the Tech page there, there should be contact info for all the IHRA tech personel, best bet would be to contact someone and get an answer.

Re: IHRA classification guide
 

Not online. Contact Tech. If a new combo they follow whats on the NHRA's site. They don't follow the NHRA's increases, just the decreases, and also have as has been stated truck, FI, and pure stock.

You might get your answer just as quick asking here from a racer running that combo.

Eric

Re: IHRA classification guide
 

Thanks, guys, for the info.

Re: IHRA classification guide
 

What is the application. ? I have a set of books and may can help.

Re: IHRA classification guide
 

Danny 80-81 Z-28 with a 305?????

Re: IHRA classification guide
 

I believe it is the same as the non Z-28 '81 camaro at 241 HP.

Re: IHRA classification guide
 

80 Z/28 = 180/ 238, 14.35 break= natural M class.........80 Berlinetta Z/28 =180/238 , 14.55 break = natural N class........81 Z/28 not listed. only Berlinetta & camaro listed = 155/241 ,14.31 break = natural M class ,regular camaro is same hp with a 14.08 break . Hope this helps.

Re: IHRA classification guide
 

Whats the major body difference between an '80 and '81

Re: IHRA classification guide
 

Not sure . They look pretty much the same. Anybody know ?

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Danny, is the 1992 Olds Toronado Trofeo rated 231/170-170 and have a weight break of 20.26, as in NHRA?

Re: IHRA classification guide
 

Mike,That's what i got in my book . You are correct.

Re: IHRA classification guide
 

Ok, can you take ten horsepower off please? Thanks a bunch.

LOL. Just wanted to make sure it was the same. I was kidding abou taking HP off. Unless you want to go ahead and do it. :)

Re: IHRA classification guide
 

Thanks Danny! I'm just trying to get the car to fit "N" that way I don't have to put a roll bar in the car....way to good of a car to cut up! Car was only on the road for 11 or 12 years...it moved under it's own power for the first time since 1992 Monday! Mine is a loaded out "T" top car light blue ext blue int :)

Re: IHRA classification guide
 

Have you thought about pure stock as in f, g, h ,natural g car ? these are 1 lb weight breaks. Mike, Take off 10 and add 200 lb's lol. Just kiddin. I wish they'd let me run a 3 speed auto in my 66 nova.

Re: IHRA classification guide
 

But Danny you can....in SS! ;)

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Greg,

Are you going to run your Camaro as a stocker now?

Re: IHRA classification guide
 

It is set-up as a Street/Strip car right now (I just bought new rubber today for all four corners) BUT if I would happen to sell the Cutlass then I have to have a "class" car & quick! That being said I have an engine & trans all I would need to do is a gear change! ;)

Re: IHRA classification guide
 

Can someone post the IHRA Pure Stock weight breaks . Specifically, the bottom 2 or 3?

It might be the only place to race without a diaper, in a few years.

BTW ,IHRA cars and indexes are legal to run at our combo races.

Re: IHRA classification guide
 

Mark, A/PS to I/PS. One pound weight breaks.
A - 8.00 Index 12.05
B - 9.00 Index 12.45
C - 10.00 Index 12.75
D - 11.00 Index 13.10
E - 12.00 Index 13.40
F - 13.00 Index 13.75
G - 14.00 Index 14.05
H - 15.00 Index 14.30
I - 16.00-16.99 Index 14.55

Re: IHRA classification guide
 

Thanks, Mike
So, is there a weight penalty for a stick shift?

Re: IHRA classification guide
 

Mark,

Straight from the rule book.

Pure Stock
These classes are for street type cars which have minor modifications to the engine,
chassis, transmission, carburetor, etc., unless it is specifically stated that a modification
or optional equipment is permitted. No turbo or super charged cars allowed. A through I
are the only available classes, with the same class breaks as stock, "Class weight breaks
and indexes are for both stick and automatic".
Numbers must be at least 4” high on all 4 windows.
CLASS WEIGHT BREAKS FOR STICK AND AUTOMATIC:
A/PS ....................8.00 to 8.99
B/PS ....................9.00 to 9.99
C/PS ....................10.00 to 10.99
D/PS ...................11.00 to 11.99
E/PS ....................12.00 to 12.99
F/PS.....................13.00 to 13.99
G/PS ....................14.00 to 14.99
H/PS ...................15.00 to 15.99
I/PS......................16.00 to 16.99

Re: IHRA classification guide
 

Battery up front, Water pump and alternator must be driven by crankshaft. Headers permitted ,but must run mufflers that do not go straight threw. cannot uncap headers,Stock type fuel pump must be used.one electric pump allowed when used through stock mechanical pump.you may remove other drive belts such as power steering ,a/c ,ect............. and there is more rules listed on page 63 of the 2010 IHRA rule book.Should be able to go on line and find these rules.

Re: IHRA classification guide
 

no hoosier radials allowed because they say 30" on the side wall desigination!! tires must say 29.5 or smaller.

Re: IHRA classification guide
 

Great class, IHRA Pure Stock engine rules are pretty much the same as NHRA stock engine rules were in the 80's before things started to become "unstock".

Re: IHRA classification guide
 

Be careful on your cam and springs too.

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M/T makes a 29.5x9 that is legal! Truman got M/T to make them

Re: IHRA classification guide
 

Does the 80 Volare with 360 have the same 185/289 rating as does NHRA? Would weigh 3345 for G and 3490 for H in NHRA.

May be a question for Danny Waters but anyone who knows the answer I'd appreciate it.

Re: IHRA classification guide
 

IHRA hp is 185/285.stock class weight in g is=3305 & h is3447. Hope this helps.

Re: IHRA classification guide
 

Thanks Danny...may be seeing how much changes I've made will pick me up before going to Indy and Union race looks like it may work out for me.

Re: IHRA classification guide
 

Good Luck !

Re: IHRA classification guide
 

Lyn,
You can now run the hoosier as long as it measures no more than the 29.5 I talked with Jonny and Mike about this. Hoosier will not label sidewalls @ 29.5 ,however as long as they measure correctly you may run them. Also all cams require stock duration for pure stock and the other items like Danny said.

Re: IHRA classification guide
 

Danny What is the HP rating for a 1995 Trans Am LT1 engine for stock ? Mike

Re: IHRA classification guide
 

275/ 325 for stock. pure stock is 275/315. hope this helps

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Danny, I thought only 5 HP off in pure stock on FI cars running the original trans.

Re: IHRA classification guide
 

Just reading what's in my books. I will check the master books this weekend in Michigan.

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Danny you have a PM.

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Speaking of IHRA Pure Stock, (of which I want to run)... I see where the rulebook says you have to have the stock trans for yr. and h.p. claimed.
The way I understand the wording is that the automatic is restricted to a shift kit and convertor only.

However, the wording on the manual trans does not list any internal restrictions. Does that mean I could run a fully race prepped T-5 in my 95 Mustang GT ...as long as the outside of the trans appears stock for my 95 ?

Just curious...not that a 14 sec. car needs a full tilt T-5 :D

Re: IHRA classification guide
 

Thinking of running my 1993 mustang in crate motor. What class would the 340 hp 302 be in, or the 450 hp 347. Thanks Bob

Re: IHRA classification guide
 

bmf racing, you'll need to let us know what body style you have.

almack, I think that is correct.