04 nhra rule changes finally out
Thread Starter
Honda-Tech Member
Joined: May 2001
Posts: 7,190
Likes: 0
From: Tallahassee, FL, US
04 nhra rule changes finally out
http://www.nhrasportcompact.co....html
Only SFWD change is liminting us to 26" slicks. kick ***, no crazy changes.
Crap, am I reading this right, Hot rod limited to a turbo with a 3.1" inlet? Isn't that a damn T04E housing, or do some of the bigger chargers neck down to 3" at the wheel itself?
Modified by Jared at 7:36 PM 11/20/2003
Only SFWD change is liminting us to 26" slicks. kick ***, no crazy changes.
Crap, am I reading this right, Hot rod limited to a turbo with a 3.1" inlet? Isn't that a damn T04E housing, or do some of the bigger chargers neck down to 3" at the wheel itself?
Modified by Jared at 7:36 PM 11/20/2003
Thread Starter
Honda-Tech Member
Joined: May 2001
Posts: 7,190
Likes: 0
From: Tallahassee, FL, US
Re: 04 nhra rule changes finally out (Jared)
The following rule changes will be implemented by NHRA for the 2004 NHRA Summit Sport Compact Series:
--------------------------------------------------------------------------------
ALL MOTOR
New Minimum Weights
FWD 4 cyl.
Up to 2.20 liter (134.25 ci): 1,675 pounds
2.21 to 2.4 liter (134.26 ci to 146.50 ci): 1,700 pounds
2.41 to 2.6 liter (146.51 ci to 158.50 ci): 1,725 pounds
2.6 max displacement, regardless of weight
Full tube chassis: +75 pounds
Back half chassis: +25 pounds*
*A back half car complies with ALL unibody rules except for missing OEM rear strut towers. All other non-compliant vehicles default to Full tube chassis penalty.
RWD 2 rotor: 1,900 pounds
RWD 4 cyl
2.0 liter (122.25 ci) & less: 1,825 pounds
2.01 to 2.2 (122.26 ci to 134.25 ci): 1,850 pounds
2.21 to 2.4 (134.26 ci to 146.50 ci): 1,875 pounds
2.41 to 2.6 (146.51 ci to 158.50 ci): 1,900 pounds
2.6 max displacement, regardless of weight.
VW air cooled
"Type 1" or "waterboxer", cast magnesium or cast aluminum case permitted. NHRA accepted aftermarket heads permitted. Accepted aftermarket heads are:
910 Pro Series AutoCraft
SHO Performance Technology
Max displacement 2.6 liter (158.50 ci): 1,725 pounds
Aftermarket transmission
+150 pounds all cars
Chassis
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Body
Body must be on NHRA Accepted Body list. Pickup and SUV bodies prohibited.
--------------------------------------------------------------------------------
PRO RWD
4 cylinder/2 rotor: 2,000 pounds 1 or 2 power adders
Maximum displacement 2.8 liter (170.75 ci)
3 rotor: (no change): 2,200 pounds 1 or 2 power adders
6 cylinder
3.5 liter (213.50 ci) max: 2,350 pounds 1 power adder
3.5 liter (213.50 ci) max: 2,450 pounds 2 power adders
Max turbo on 6 cylinder = 91.5 mm single, 72 mm twins, measured as follows:
Single Turbocharger - Single turbochargers are permitted with the following requirements: 1) Turbocharger must be of conventional impeller and housing design and type. 2) Turbocharger is limited to a maximum size of 3.602" (91.49mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing is permitted a maximum inlet diameter of 3.673" (93.29mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Twin Turbochargers - Dual (2) turbochargers are permitted with the following requirements: 1) Each Turbocharger must be of conventional impeller and housing design and type. 2) Each Turbocharger is limited to a maximum size of 2.834" (71.98mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing of each turbocharger is permitted a maximum inlet diameter of 2.905" (73.78mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger(s) must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Each turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Chassis
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Body:
Body must be on NHRA Accepted Body list.
Body must be of import manufacture or domestic-labeled, joint-manufactured platform. (Examples are Chevy Cavalier, Chrysler Conquest, Chevy S-10, Dodge Colt, Dodge Neon, Dodge Stealth, Eagle Talon, Ford Focus, Ford Probe, Ford Ranger, GMC Sonoma, Mercury Cougar, Plymouth Laser, Pontiac Sunfire.) Domestic models must be NHRA accepted.
Mild customizing, chopping, channeling, sectioning permitted, but must retain full-size, full-bodied appearance, with minimum 2 functional doors. Doors must open and close from inside and outside. OEM glass may be replaced with Lexan or other shatterproof material, minimum thickness 1/8-inch. Lightweight replacement panels permitted. Body must be full scale (7/8-, 3/4-scale, etc. prohibited). Final approval rests with NHRA. NHRA will monitor size, shape, and mounting of spoilers and/or wings; final approval rests with NHRA. Maximum front overhang 45-inches, measured from front of car to center of spindle. In the interest of maintaining "stock bodied appearances" of Pro RWD vehicles, NHRA is currently evaluating body dimension guidelines and methods of enforcement. It is strongly advised that any new Pro RWD vehicles under construction should be held as close to stock dimensions as possible. Final Approval rests with NHRA. Front ends may be lengthened to establish 45-inch maximum overhang measurement. Body must appear on Accepted Body List.
--------------------------------------------------------------------------------
MODIFIED
Minimum Weights
RWD or AWD 2 rotor (1 or 2 power adders): 2,000 pounds
RWD or AWD 4 cylinder, up to 2.8 liter (170.75 ci) (1 or 2 power adders): 2,100 pounds
RWD or AWD 6 cylinder, up to 3.5 liter (213.50 ci) (1 power adder max): 2,700 pounds
Non-OEM floor: add 100 pounds
Max turbo size on 6 cylinder = 78 mm single, 61 mm twins, measured as follows:
Single Turbocharger - Single turbochargers are permitted with the following requirements: 1) Turbocharger must be of conventional impeller and housing design and type. 2) Turbocharger is limited to a maximum size of 3.070" (77.98mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing is permitted a maximum inlet diameter of 3.141" (79.78mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Twin Turbochargers - Dual (2) turbochargers are permitted with the following requirements: 1) Each Turbocharger must be of conventional impeller and housing design and type. 2) Each Turbocharger is limited to a maximum size of 2.401" (60.98mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing of each turbocharger is permitted a maximum inlet diameter of 2.472" (62.78mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger(s) must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Each turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Transmission
Air shifters prohibited
Chassis
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Body
Body must be on NHRA Accepted Body list. Pickup or SUV prohibited.
--------------------------------------------------------------------------------
HOT ROD
Maximum displacement = 2.5 liter (152.50 ci)
Maximum turbo size = 78 mm, single configuration only, measured as follows:
Single turbochargers are permitted with the following requirements: 1) Turbocharger must be of conventional impeller and housing design and type. 2) Turbocharger is limited to a maximum size of 3.070" (77.98mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing is permitted a maximum inlet diameter of 3.141" (79.78mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Chassis
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Body
Body must be on NHRA Accepted Body list.
--------------------------------------------------------------------------------
PRO FWD
Engine
Maximum displacement 2.8 liter (170.75 ci).
Maximum one (1) turbocharger permitted. No size restriction at this time.
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Tires
DOT or racing slicks permitted with a maximum width of 11.5 inches and maximum height of 31.0 inches. Maximum rollout on drive tires 99 inches.
Body
Any FWD, 4-cylinder automobile, import or domestic, permitted. OEM RWD or AWD may not be converted to FWD. Mild customizing, body kits, and chopped roofs permitted, but must retain full-bodied appearance, with minimum 2 functional doors. Doors must open and close from inside and outside. OEM glass may be replaced with Lexan or other shatterproof material, minimum thickness 1/8-inch. Body parts may be replaced with lightweight replacement panels. One-piece, lift-off front ends permitted. Maximum front overhang 45 inches, measured from front of car to center of front axle. In the interest of maintaining "stock bodied appearances" of Pro FWD vehicles, NHRA is currently evaluating body dimension guidelines and methods of enforcement. It is strongly advised that any new Pro FWD vehicles under construction should be held as close to stock dimensions as possible. In particular, oversized "bulges" or "humps" on front fenders are prohibited. Final Approval rests with NHRA. Front ends may be lengthened to establish 45-inch maximum overhang measurement. Body must appear on NHRA Accepted Body list.
SPORT FWD
Tires
DOT or racing slicks permitted with a maximum width of 10.5 inches and maximum height of 26.0 inches.
--------------------------------------------------------------------------------
ALL MOTOR
New Minimum Weights
FWD 4 cyl.
Up to 2.20 liter (134.25 ci): 1,675 pounds
2.21 to 2.4 liter (134.26 ci to 146.50 ci): 1,700 pounds
2.41 to 2.6 liter (146.51 ci to 158.50 ci): 1,725 pounds
2.6 max displacement, regardless of weight
Full tube chassis: +75 pounds
Back half chassis: +25 pounds*
*A back half car complies with ALL unibody rules except for missing OEM rear strut towers. All other non-compliant vehicles default to Full tube chassis penalty.
RWD 2 rotor: 1,900 pounds
RWD 4 cyl
2.0 liter (122.25 ci) & less: 1,825 pounds
2.01 to 2.2 (122.26 ci to 134.25 ci): 1,850 pounds
2.21 to 2.4 (134.26 ci to 146.50 ci): 1,875 pounds
2.41 to 2.6 (146.51 ci to 158.50 ci): 1,900 pounds
2.6 max displacement, regardless of weight.
VW air cooled
"Type 1" or "waterboxer", cast magnesium or cast aluminum case permitted. NHRA accepted aftermarket heads permitted. Accepted aftermarket heads are:
910 Pro Series AutoCraft
SHO Performance Technology
Max displacement 2.6 liter (158.50 ci): 1,725 pounds
Aftermarket transmission
+150 pounds all cars
Chassis
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Body
Body must be on NHRA Accepted Body list. Pickup and SUV bodies prohibited.
--------------------------------------------------------------------------------
PRO RWD
4 cylinder/2 rotor: 2,000 pounds 1 or 2 power adders
Maximum displacement 2.8 liter (170.75 ci)
3 rotor: (no change): 2,200 pounds 1 or 2 power adders
6 cylinder
3.5 liter (213.50 ci) max: 2,350 pounds 1 power adder
3.5 liter (213.50 ci) max: 2,450 pounds 2 power adders
Max turbo on 6 cylinder = 91.5 mm single, 72 mm twins, measured as follows:
Single Turbocharger - Single turbochargers are permitted with the following requirements: 1) Turbocharger must be of conventional impeller and housing design and type. 2) Turbocharger is limited to a maximum size of 3.602" (91.49mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing is permitted a maximum inlet diameter of 3.673" (93.29mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Twin Turbochargers - Dual (2) turbochargers are permitted with the following requirements: 1) Each Turbocharger must be of conventional impeller and housing design and type. 2) Each Turbocharger is limited to a maximum size of 2.834" (71.98mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing of each turbocharger is permitted a maximum inlet diameter of 2.905" (73.78mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger(s) must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Each turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Chassis
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Body:
Body must be on NHRA Accepted Body list.
Body must be of import manufacture or domestic-labeled, joint-manufactured platform. (Examples are Chevy Cavalier, Chrysler Conquest, Chevy S-10, Dodge Colt, Dodge Neon, Dodge Stealth, Eagle Talon, Ford Focus, Ford Probe, Ford Ranger, GMC Sonoma, Mercury Cougar, Plymouth Laser, Pontiac Sunfire.) Domestic models must be NHRA accepted.
Mild customizing, chopping, channeling, sectioning permitted, but must retain full-size, full-bodied appearance, with minimum 2 functional doors. Doors must open and close from inside and outside. OEM glass may be replaced with Lexan or other shatterproof material, minimum thickness 1/8-inch. Lightweight replacement panels permitted. Body must be full scale (7/8-, 3/4-scale, etc. prohibited). Final approval rests with NHRA. NHRA will monitor size, shape, and mounting of spoilers and/or wings; final approval rests with NHRA. Maximum front overhang 45-inches, measured from front of car to center of spindle. In the interest of maintaining "stock bodied appearances" of Pro RWD vehicles, NHRA is currently evaluating body dimension guidelines and methods of enforcement. It is strongly advised that any new Pro RWD vehicles under construction should be held as close to stock dimensions as possible. Final Approval rests with NHRA. Front ends may be lengthened to establish 45-inch maximum overhang measurement. Body must appear on Accepted Body List.
--------------------------------------------------------------------------------
MODIFIED
Minimum Weights
RWD or AWD 2 rotor (1 or 2 power adders): 2,000 pounds
RWD or AWD 4 cylinder, up to 2.8 liter (170.75 ci) (1 or 2 power adders): 2,100 pounds
RWD or AWD 6 cylinder, up to 3.5 liter (213.50 ci) (1 power adder max): 2,700 pounds
Non-OEM floor: add 100 pounds
Max turbo size on 6 cylinder = 78 mm single, 61 mm twins, measured as follows:
Single Turbocharger - Single turbochargers are permitted with the following requirements: 1) Turbocharger must be of conventional impeller and housing design and type. 2) Turbocharger is limited to a maximum size of 3.070" (77.98mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing is permitted a maximum inlet diameter of 3.141" (79.78mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Twin Turbochargers - Dual (2) turbochargers are permitted with the following requirements: 1) Each Turbocharger must be of conventional impeller and housing design and type. 2) Each Turbocharger is limited to a maximum size of 2.401" (60.98mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing of each turbocharger is permitted a maximum inlet diameter of 2.472" (62.78mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger(s) must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Each turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Transmission
Air shifters prohibited
Chassis
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Body
Body must be on NHRA Accepted Body list. Pickup or SUV prohibited.
--------------------------------------------------------------------------------
HOT ROD
Maximum displacement = 2.5 liter (152.50 ci)
Maximum turbo size = 78 mm, single configuration only, measured as follows:
Single turbochargers are permitted with the following requirements: 1) Turbocharger must be of conventional impeller and housing design and type. 2) Turbocharger is limited to a maximum size of 3.070" (77.98mm) - inducer wheel diameter at the point where the leading edge of the compressor wheel meets the inlet housing. 3) Inlet housing is permitted a maximum inlet diameter of 3.141" (79.78mm) where the leading edge of the compressor wheel meets the housing. 4) All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas or any other substance into the inlet or exhaust housing is prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Chassis
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Body
Body must be on NHRA Accepted Body list.
--------------------------------------------------------------------------------
PRO FWD
Engine
Maximum displacement 2.8 liter (170.75 ci).
Maximum one (1) turbocharger permitted. No size restriction at this time.
Center-driver position prohibited. Driver must be located completely to the left or right of vehicle centerline.
Tires
DOT or racing slicks permitted with a maximum width of 11.5 inches and maximum height of 31.0 inches. Maximum rollout on drive tires 99 inches.
Body
Any FWD, 4-cylinder automobile, import or domestic, permitted. OEM RWD or AWD may not be converted to FWD. Mild customizing, body kits, and chopped roofs permitted, but must retain full-bodied appearance, with minimum 2 functional doors. Doors must open and close from inside and outside. OEM glass may be replaced with Lexan or other shatterproof material, minimum thickness 1/8-inch. Body parts may be replaced with lightweight replacement panels. One-piece, lift-off front ends permitted. Maximum front overhang 45 inches, measured from front of car to center of front axle. In the interest of maintaining "stock bodied appearances" of Pro FWD vehicles, NHRA is currently evaluating body dimension guidelines and methods of enforcement. It is strongly advised that any new Pro FWD vehicles under construction should be held as close to stock dimensions as possible. In particular, oversized "bulges" or "humps" on front fenders are prohibited. Final Approval rests with NHRA. Front ends may be lengthened to establish 45-inch maximum overhang measurement. Body must appear on NHRA Accepted Body list.
SPORT FWD
Tires
DOT or racing slicks permitted with a maximum width of 10.5 inches and maximum height of 26.0 inches.
Honda-Tech Member
Joined: Mar 2003
Posts: 2,153
Likes: 0
From: Fredericksburg, VA, USA
Re: 04 nhra rule changes finally out (hybrid901)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybrid901 »</TD></TR><TR><TD CLASS="quote">Is there any weight limit for sport fwd?</TD></TR></TABLE>
2300 with 1 power adder
2400 with 2 power adders. I guess they didn't change that.
2300 with 1 power adder
2400 with 2 power adders. I guess they didn't change that.
Thread Starter
Honda-Tech Member
Joined: May 2001
Posts: 7,190
Likes: 0
From: Tallahassee, FL, US
Re: 04 nhra rule changes finally out (Rhman19)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rhman19 »</TD></TR><TR><TD CLASS="quote">
2300 with 1 power adder
2400 with 2 power adders. I guess they didn't change that.
</TD></TR></TABLE>
Crap, I'd never even seen that, I'll have to add weight to my CRX to get it up to NHRA weight then. How strictly do they enforce that in the street classes?
2300 with 1 power adder
2400 with 2 power adders. I guess they didn't change that.
</TD></TR></TABLE>
Crap, I'd never even seen that, I'll have to add weight to my CRX to get it up to NHRA weight then. How strictly do they enforce that in the street classes?
Honda-Tech Member
Joined: Dec 2001
Posts: 12,822
Likes: 0
From: long island, ny, united states
Re: 04 nhra rule changes finally out (Jared)
according to the NHRA officals that i have spoken to they are gonna be very strict next year.....i wouldnt and am not gonna try and pull any ****
Honda-Tech Member
Joined: Jun 2002
Posts: 603
Likes: 0
From: Central, NJ
Re: 04 nhra rule changes finally out (miller)
At this pass NHRA event at E-town, I watched them tech some SFWD and SRWD/AWD cars and they where pretty thorough. I guess its gonna be even more in 2004...
Trending Topics
Honda-Tech Member
Joined: Mar 2003
Posts: 2,153
Likes: 0
From: Fredericksburg, VA, USA
Re: 04 nhra rule changes finally out (hybrid901)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybrid901 »</TD></TR><TR><TD CLASS="quote">Is there even a weight limit in NRDA Turbo 4?</TD></TR></TABLE>
Not this year. I doubt there will be one next year, but I guess stranger things have happened.
Not this year. I doubt there will be one next year, but I guess stranger things have happened.
Thread
Thread Starter
Forum
Replies
Last Post
n-c
Road Racing / Autocross & Time Attack
7
Oct 18, 2005 08:30 AM
