Here are the rules for the 2007 Buick Limited Street. It is being scheduled to run Qualification early Friday with Eliminations that evening. This will allow turbo v-6's entries to run in their turbo specific classes on Saturday and v-8 guys to fall in the Open Comp or Super 16. CLASS DESCRIPTION Buick Limited Street is a heads up class designed for stock appearing, rear wheel drive Buicks produced 1960-1987. Entries are permitted small block or big blocks with superchargers, turbochargers, or nitrous. All Run, NHRA Sportsman Ladder, 1/8 mi. Pro .400 tree, Heads-Up. REQUIREMENTS AND SPECIFICATIONS BODY The body must retain its original appearance and profiles. Original OEM body shell type and dimension required. Aftermarket fiberglass replacement panels allowed for hood, hoodscoop, bumpers, and OEM appearing replacements that bolt on as long as weight ratio and minimums are maintained. Aerodynamics - Taping of any parts of body, seams, or front end is prohibited. Fender Splash Pans - Removable fender splash pans are acceptable. Fenderwells not required. Firewall - Firewall must be original and in stock location. Hood/Scoop - Cowls and factory type forward facing scoops only. May be liftoff. No visible altercations to outside body for fresh air. Forward facing Hood scoop allowed for n/a. Hood/scoop must cover entire engine and induction components. Interior - Dash, stock-appearing steering column, and carpeting, are required. Interior wheelwells may be modified for tire clearance. Aftermarket bucket seats are allowed. A full stock dashboard with instruments (aftermarket instruments are allowed) and controls must be retained. The back seat may be deleted. Lettering/Decals - Car lettering is limited to windows only. Wheel tubs - In order to clear legal tires, mini-wheel tubs are acceptable. Windshield/Windows FRONT Windows must be operative but closed during racing. Front and rear windows may be lexan but must appear OEM. No lexan allowed that requires support or that does not conform to the original contour of OEM without support. No crazed, fogged, or weathered lexan that that creates a safety hazard and does not pass for the clear appearance of OEM glass. Wings/Spoilers - Factory available front and rear spoiler or wing for specific year/make/model of body used will be allowed. A maximum of a 12 aftermarket rear wing is allowed with a maximum side height of 3.5. BRACKET RACING AIDS Bracket racing aids such as optical sensors, delay boxes, stutter boxes, and throttle stops are not allowed. The application or use of any device, mechanical or electronic, that permits the driver to ascertain the position of their vehicle in relation to the starting line is prohibited. CHASSIS/SUSPENSION Chassis No back-half chassis. Full factory type frame rails required. Front framerails must remain in the stock location and may not be altered for the purpose of providing tire clearance. Tubular crossmembers are permitted. Rear frame may be notched for tire clearance. Any strengthening members may be added to a stock frame. Front Suspension - Aftermarket direct-replacement components are allowed as long as stock mounting points are maintained on components and frame. Coilover shocks are permitted in stock spring location. Rear Suspension - Ladder bar, or modified stock suspension. Mounting points for stock type suspension may have multiple attach points for geometry change but must be in stock location. COOLING SYSTEM Radiator - must be mounted in stock location. No restriction on size. DRIVETRAIN Automatic Transmission - Any OEM type automatic transmission with torque converter is allowed. Transbrake is allowed. Aftermarket shifter allowed but any gear change must occur as a result of an internal function of the transmission or as direct action of the driver. Pneumatic, hydraulic, electric, etc. shifters prohibited. Manual Transmission - No planetary Lencos, Libertys, Jerico type transmission. Gear change must occur by clutch interruption from driver. Rearend - Any automotive type allowed, any ratio. ENGINE Must be Buick. Any make Buick engine in any allowed body style. There is no cubic inch limit. Any internal engine modifications are allowed. EXHAUST All exhaust must pass thru the muffler(s). FUEL Fuel - Only gasoline is allowed. The addition of chemical additives intended to alter the makeup of the gasoline for increased performance is strictly prohibited. IGNITION Aftermarket ignitions, magnetos, multiple-step rev limiters, electronic-conversion kits, crank triggers, and external amplifier boxes are allowed. Intake Manifold Any commercially available single 4 barrel cast intake manifold except as outlined. Cast intake manifold may be internally modified. Naturally aspirated and v-6 engine can run fabricated sheet metal intake or cast. N/A allowed to run 2x4 setup. Nitrous Oxide - Nitrous oxide is allowed but use is limited to only one of the three types described below. Nitrous oxide may not be used in conjunction with supercharger or turbocharger. Type One: Wet Flow Plate system- This is a plate system for carburetor or throttle body injections. The use of 2 plates allowed. Plate(s) are limited to 4 total spray bars. 2-nitrous, 2-fuel. Spray may aim at runners but fuel/nitrous delivery hardware (nozzles, spray bars, etc) must be contained in removable plate(s), mounted directly between the carb or throttle body EFI and the intake manifold. No portion of a delivery system may extend below the bottom of its own plate. The use of 2 stages with 4 solenoids(2 fuel, 2 nitrous)allowed. 2 additional solenoids may be used to purge the system to the atmosphere. There may be 4 additional solenoids positioned in the nitrous and fuel delivery lines for interrupter activation(2-nitrous, 2-fuel). Type Two: EFI Dry System- This is a single stage system that injects only nitrous into the throttle body, plenum, or individual intake runners. A plate or nozzle(s), max of one nozzle per number of cylinders, may be used for dry nitrous injection. Limited to 2 nitrous solenoids. Both solenoids must activate simultaneously. 2 additional solenoids allowed in-line for interrupter activity. Type Three: Single Stage Fogger/Direct Port - This is a single stage port injection nitrous system for carburetor, throttle body injection, or multi-port EFI. For carburetor, only one dual port (nitrous oxide/fuel enrichment) nozzle per cylinder located in each port runner of the intake manifold is allowed. For throttle body and multi-port EFI, only one nitrous oxide nozzle per cylinder located in each port runner of the intake manifold is allowed. 2 nitrous and 2 fuel delivery solenoids are allowed and must be dedicated evenly between the engine's cylinders. 2 additional solenoids may be used to purge the system to the atmosphere. There may be 4 additional solenoids positioned in the nitrous and fuel delivery lines for interrupter activation (2-nitrous, 2-fuel). Bottles - Bottles are limited to one 10 lb bottle. Any size delivery line. Electronics - Progressive systems and timers, which control nitrous/fuel delivery, are permitted. Electronic or automated boost controllers of any type are allowed on any forced induction vehicle. Ram Air No headlight removal or additional holes in exterior body for air intake. Supercharger - The following makes and models of superchargers are the only units permitted. Injection of any liquid, gas or any other substance in before or after the inlet housing on intercooled entries prohibited. Vortech A,B,S,Y,R,J,JT,T,YS, YSi & X trim models Procharger D1,D1X,D1R,F1,F1R models Procharger P600, D1SC, P1SC, P1SC-2, P1SC-H Paxton Novi SN,VR4,1000, 2000 models Turbocharger The follow list of turbo types are the only units permitted. Maximum Single turbo size: Garret- all 3-Bolt or T-4 4-bolt housings w/ 4" inlet-3" outlet. Max size turbo allowed GT4288-(Max Inducer Wheel Dimension 76mm) GT42 super 76 GTS trim Precision Turbo- PT-88, 4" Inlet/3" Outlet Compressor Cover, with 3- Bolt or T4 4-bolt Turbine Housings Innovative/Turbonetics - GT82-Y2K Maximum Turbo Size for twin setup: Any 3-bolt or T4 4-Bolt Turbo with a Maximum Inducer wheel Dimension of 61mm Maximum. Compressor Cover Inlets restricted to 3" inlet & 2" Outlet. No radiused inlets. All turbos must have the correct inlet size for compressor wheel used, No cross breeding. Inlet size measure at the turbo. Outlet size measure at the turbo. Turbo Placement - Turbo may be located anywhere inside the engine compartment, facing any direction. Inlet must not be forward of the radiator support. Turbo inlet may remain open to outside. Aftercoolers/Intercoolers - Aftercoolers/Intercoolers are permitted. Air-to-air coolers or Air-to-water coolers are the only systems acceptable. Water and ice are the only two acceptable components allowed in reservoir. ONBOARD DIAGNOSTICS/DATA RECORDERS Onboard diagnostic computers and data recorders are allowed. Memory and playback tachometers are acceptable. Autometer Dual Channel Ultimate II tachometers are acceptable. No optical or rpm pickup of for the use of traction control allowed after the flywheel. STEERING Aftermarket rack-and-pinion steering is allowed. TIRES Rear tires may either be DOT-approved and labeled or labeled for racing slicks. DOT tires must have labels facing the outside of the body and are limited to a 30x13.5, tread not to exceed 11.25 measured. Slicks are limited to a maximum sidewall designation of 10.5 inches width and may never exceed 10.6 inches in width. No W' tires. No drive tire may have an advertised height greater than 30.5. The front tires are limited to 4.5-inch minimum tread width. The tread of tires must not protrude outside of the exterior of bodyline at top of tires. Tire will be checked with a go/ No-Go gage for width and height. WHEELBASE/WHEELS Wheelbase - Must retain stock wheelbase with a maximum variation from front to back of 2 inch. WEIGHT BREAKS Weight breaks will be constantly evaluated to ensure parity with all combinations. Base Weight 3,000 lbs - Naturally Aspirated Big Block 3,000 lbs Nitrous Small blocks 3,200 lbs Nitrous Big Block up 470, 2.9 lbs/ci after that. 3,100 lbs Supercharged, turbo v-8 up to 360 inches. 2.9 lbs/ci for every inch over 360. Max weight 3600. 3,200 lbs - Turbocharged v-6 Air-to-water intercooler Add 100lbs Manual transmission Add 200lbs Max weight required for any and all combinations 3600lbs.
I need some clarification regarding the "Interior" Rules; It says "Aftermarket bucket seats are allowed." It doesn't say 2 aftermarket seats are allowed. Since I have 1 aftermarket racing seat, my interpratition of that is 1 is OK, because there are quite a few different kinds of seats available in the aftermarket, right?! I guess you could call the 15lb. nitrous bottle on the passanger side "a very artsy fartsy, post modern " uncomfortable seat! Next is "Carpeting", the rules say "blah, blah, blah, and carpeting are required". What is the minimum amount of carpeting to meet the requirment?? My heavy sled (about 3550lbs w/ driver) has the factory carpet delete option. If I throw a couple large carpet material floor mats in, will that be OK?? I need to make sure that guy doing the Tech. is happy.......Right Rick! Gary G.
Gezz your so needy....I guess you could put a pony saddle on the bottle but the idea is to have two seats or one really wide seat. As far as the modern look approach, don't go there. Large cylindrical object do not take the place of a seat in the "straight" world............ On the carpet, I know your Mrs. would love to lend you one of the area rugs out of the living room. OR just borrow one out of your other 65'. You'll probably need the motor out of it by then anyways so grab the carpet while your at it. Don't make me get your wife involved to get it looking "nice". You were the one that decided to make a convertable into a race car so now you have to deal with keeping up the image :laugh:
Limited Street So what kind of turnout is expected? I dont see much action on this post. I am going to plan on making it,but I planned on 3 races last year and never got the car ready. Motor is about done,but the car itself needs work,the body is a mess. Is this class going to be run at any other Buick events this year? If not,will there be something comparable...something heads up 10.5 tire-wise? Let's see a roll-call of those planning on making this class work out...Fish
Hi Guys, I, for one, would also like to run this class but the ONLY hinderence I can see as far as the posted rules above for me would be that my Regal is being set-up to run E-85 (85% corn ethanol/15% gasoline) with my FAST XFI by Cal Hartline. Would I be allowed to do so or would this allowance open an entirely new can-o-worms in terms of "other" fuels?o No: If this will not be a problem, my health holds out to let me finish the car on time and I'm not laid up in the hospital during the event then I most certainly plan on running this class! I'll be able to hook the transbrake up for this one.:Brow: As a side thought.....being that I have an XFI it will hold a couple of different "tunes" so I guess as a back-up I could have Cal give me an additional stricly gasoline program. The only thing with doing that is I'm worried that my 84lb injectors may indeed be too big then and open a whole new set of problems for me.
Kerry Don't worry about e-85 it will be allowed you buy it out of a gas station from a pump. if anyone bitch's we can ask them if they run pump gas LOL. I know I can't buy c-16 out of any gas station around here. :TU:
Hey Fish, there a few that go "Silent" when rules are posted for the heads up classes, there WILL be cars in this class, besides Rick already told me if anyone beats him in BG he will buy them dinner.... :grin:
I like this class and I'm taking notes (ask Bobb and Rick! :grin: ) but it will be a while before I have a car ready. If you run your car I'll hang out and take more notes! :beer
If that is so, anyone for... BTW Here ya go Jeff..... You'll have a hard time beating me....because...... So come and get it! And yes there are the silent few that will be there. And Yes, you can run E-85. You can buy it at pumps all over now. It hard to say "pump gas" isn't allowed. :TU:
Trash talkin' street racers. What's the Buick community coming to? :laugh: :laugh: Maybe it's the nitrous that makes you all goofy. Got a leak in your car somewhere? :3gears:
:boring: :sleep: Who says it's a "leak"........A leak is not nearly enough to have fun with... :laugh: Someone has to talk a little trash, :rant: most of the guys around here are too old to have fun anymore.... ou: :ball:
Hey now Rick...There are a few people around here where a statement like that could hurt their feelings! :ball: 40 is a next monther for me... :shock:
Hey, now. You're pretty cocky for a guy that needs a blue bottle to make horsepower. :moonu: I like what Grumpy Jenkins said "Turbos (or nitrous) are for people that can't build engines." o No: :laugh:
I'll talk smack when I can back it up :grin: ...but right now I have to suck up to ya'll while I need help ou: Fish
Het a new Builder..... oh...whatever...... If that's the case, ya'll need to find better engine builders since they can't seem to build anything that will keep up.... :laugh: Plus I think Grumpy would have something to say about a bunch of Buick Geeks trying to use Buick engines to make race motors.
