login.php?sid=1f70a06bd27320fadc1081d5a7ecbe65 profile.php?mode=register&sid=1f70a06bd27320fadc1081d5a7ecbe65 faq.php?sid=1f70a06bd27320fadc1081d5a7ecbe65 memberlist.php?sid=1f70a06bd27320fadc1081d5a7ecbe65 search.php?sid=1f70a06bd27320fadc1081d5a7ecbe65 index.php?sid=1f70a06bd27320fadc1081d5a7ecbe65 Timeslip Database

FastGM.com Forum Index » Racers Lounge » LTx Shootout rules posted Goto page Previous  1, 2
Post new topic  Reply to topic View previous topic :: View next topic 
PostPosted: Tue Feb 15, 2011 4:52 pm Reply with quote
roadconetuning
GM fanatic
Joined: 18 Sep 2006
Posts: 13368
Location: Upstate, SC




the rules also state that anything not mentioned needs to be brought up because its probably illegal... otherwise i'd agree... but the fact that they have an L99 and LT4 in the same class is retarded... crockers dads stock LT4 vette with a K&N drop in and the stock mufflers cut out made more than some of the bolt-on LS1's we've seen lol

_________________
Y U NO FASTER?!
View user's profile Send private message Visit poster's website
PostPosted: Tue Feb 15, 2011 4:58 pm Reply with quote
Shon Herron
GM fanatic
Joined: 05 Mar 2006
Posts: 9807
Location: 29682




roadconetuning wrote:
the rules also state that anything not mentioned needs to be brought up because its probably illegal...
it can be brought up at the right time!
View user's profile Send private message Send e-mail
PostPosted: Tue Feb 15, 2011 5:14 pm Reply with quote
roadconetuning
GM fanatic
Joined: 18 Sep 2006
Posts: 13368
Location: Upstate, SC




eff that ish... should say OEM and OEM replacement rods/pistons/crank, stock as cast LTx heads/intake, stock LTx cam, stock size/type valves and everything else should be fair game...

i'm gonna go thru the entire rule list when i get home and make a roadcone edition lol

_________________
Y U NO FASTER?!
View user's profile Send private message Visit poster's website
PostPosted: Tue Feb 15, 2011 5:18 pm Reply with quote
Green to da Bean
Blastin' Heaps since 2000
Joined: 23 Feb 2006
Posts: 10219
Location: Sleasley, SC




dawgs3347 wrote:
Green to da Bean wrote:
No weight break for the manual trans?


Manual transmission receives weight break of 100 lbs.


Not in street stock they dont.

_________________
Nice Video

"Old is a state of mind. I'm 29, I fuck college girls, work 70 hours a week, run 30 miles a week, and so far so good. I'm doing this until I die!"
-The Nightrain
View user's profile Send private message Send e-mail AIM Address
PostPosted: Tue Feb 15, 2011 5:18 pm Reply with quote
Green to da Bean
Blastin' Heaps since 2000
Joined: 23 Feb 2006
Posts: 10219
Location: Sleasley, SC




roadconetuning wrote:
eff that ish... should say OEM and OEM replacement rods/pistons/crank, stock as cast LTx heads/intake, stock LTx cam, stock size/type valves and everything else should be fair game...

i'm gonna go thru the entire rule list when i get home and make a roadcone edition lol


NMRA Factory Stock rules...just replace 5.0 with Lt1. Easy.

_________________
Nice Video

"Old is a state of mind. I'm 29, I fuck college girls, work 70 hours a week, run 30 miles a week, and so far so good. I'm doing this until I die!"
-The Nightrain
View user's profile Send private message Send e-mail AIM Address
roadcones version of the rules... more realistic..
PostPosted: Tue Feb 15, 2011 6:50 pm Reply with quote
roadconetuning
GM fanatic
Joined: 18 Sep 2006
Posts: 13368
Location: Upstate, SC




Permitted Platforms & Weights
Minimum weights include the driver. NHRA rules for ballast apply. Minimum 100 lbs removable weight including weight box. Any loose ballast will result in disqualification.
L99 – minimum race weight 3200 lbs
LT1 – minimum race weight 3350 lbs
LT4 – minimum race weight 3450 lbs


Body
Open to third and fourth generation GM F-Bodies and factory LTX equipped GM Y and B bodies. The body must be stock for the year and model claimed. Aftermarket replacement body panels are limited to the hood only. No fender well or wheel tub modifications permitted.


Brakes
Must be OEM complete and functional. OEM upgrades allowed (LS1, C5, etc.). Line lock accepted on front brakes only. No aftermarket race brakes allowed. ABS may be removed. Factory drum brakes permitted in the rear.

Interior
OEM dash required. Carpet and interior panels required forward of the package shelf. Must have instrument panel, vents, heater controls, etc. Radio may be replaced with a delete plate. Two matching front seats required. Must be securely bolted down. Aftermarket seats are permitted. Rear seats may be removed.

Exterior, Windows, Wheels & Tires
All stock glass needs to be in place. Windows must be operative, but closed during competition. No lexan, etc. allowed. Bumper supports and energy absorbing materials may be removed. All mirrors for body style claimed must be present. Any automotive wheels permitted. Any DOT legal rear tire allowed that fits within the stock un-altered wheel opening. May not stick out past the fender. No slicks. Minimum 165R15 front.

Ignition, Electrical & HVAC
Must be equipped with a fully operational Opti-Spark distributor. Stock style aftermarket replacements allowed (MSD, Accell, etc.). Aftermarket ignition box allowed. Heat and air conditioning may be removed. All holes must be properly covered. OEM alternator must be in place and functional at all times. Battery must be of sufficient capacity to start the car at all times. Rear mounted batteries need to be mounted and vented per NHRA regulations, including a functional disconnect switch.

Drive Train
Driveshaft safety loop required on all entries. Any automotive rear axle allowed.

Automatic Transmission: 4L60E or 700R4 only. Modifications limited to shift kit, pan, and cooler. Any stall converter. No trans brakes allowed.
Manual Transmission: T-56 only.

Engine
Stock LT1, LT4, or L99 only. Modifications limited to roller rockers and any stock diameter valve spring. Guide plates allowed with non-self-aligning rockers. Stock rebuilds permitted, .030 overbore allowed for cleanup. OEM hydraulic lifters required. All internals including, but not limited to pistons, rods, crank, valves, cam, heads, block, etc. must be correct for engine claimed. Cylinder head modifications limited to a stock valve job. Heads must hold NHRA published volumes. The LT4 is restricted to stock rockers and springs. Stock un-ported manifold required. Manifold may be modified at the front openings for larger than stock throttle body. Edelbrock aftermarket stock style intakes may be used. Full size stock radiator mandatory for body type used. OEM replacements may be aluminum. Minimum one quart overflow required. Air cleaner is optional. Direct replacement electric water pump allowed.

Exhaust System
Mufflers are required. All exhausts must exit behind the front seats.

Suspension & Chassis
Front Suspension: Direct replacement aftermarket A-arms permitted. Stock type drag shocks allowed. Must be in stock location.

Rear Suspension: RearBolt-in aftermarket components allowed. Stock style replacement sway bar allowed. No wheelie bars or coil over shocks allowed. Aftermarket torque arms permitted. Front mount of torque arm may be relocated. NHRA legal bolt-in traction bars allowed (Pete-Z, etc.).

Chassis: Tubular bolt-in replacement K-member permitted. Sub frame connectors permitted. Rollbars are optional.

Steering: OEM steering required. Power steering pump may be removed or bypassed.

Fuel, Fuel Injection & Fuel System
Stock GM computer required. All entries must have the stock gas tank.

Power Adders
No nitrous or other power-adder equipment will be allowed on the vehicle.

Safety
SN 90 or newer helmet required. Protective clothing recommended. Long pants and closed shoes mandatory for all drivers. In addition to the class requirements all entries must meet track/NHRA requirements for the ET run. The removal of OEM safety equipment is not recommended. Seat belts required and may be upgraded. If the entry has a roll bar a dated aftermarket harness installed per NHRA regulations is required.

Street Equipment
Required. All entries must have functional lights, horn, turn signals, and wipers minimum. Cruise, fog lights, radio, etc. may be removed.

_________________
Y U NO FASTER?!
View user's profile Send private message Visit poster's website
PostPosted: Tue Feb 15, 2011 7:30 pm Reply with quote
Shon Herron
GM fanatic
Joined: 05 Mar 2006
Posts: 9807
Location: 29682




I am hoping this class fills up and 2012 we have an outlaw bolt on class. That is what I am pushin for
View user's profile Send private message Send e-mail
PostPosted: Tue Feb 15, 2011 8:00 pm Reply with quote
Diggler
GM fanatic
Joined: 23 Feb 2006
Posts: 9067
Location: upstate




lol at outlaw bolt on appl

_________________
IDinDoNuffin!
View user's profile Send private message
PostPosted: Tue Feb 15, 2011 8:36 pm Reply with quote
Shon Herron
GM fanatic
Joined: 05 Mar 2006
Posts: 9807
Location: 29682




Diggler wrote:
lol at outlaw bolt on appl
that class will be PACKED!!!

Here are the specs, but clarifying based on this comment:
Yes. All these numbers are what GM submitted to the NHRA. Things that are bold were added or changed by me. Some of these numbers are liable to change, so I wouldn't suggest that everyone run out and blueprint their motors quite yet!

NHRA Technical Specifications
For
1996 Chevrolet Motors


ROD
BORE STROKE DISPLACEMENT CYLINDERS LENGTH
4.000 3.484 262 6 5.700
3.750 3.000 265 8 5.964
4.001 3.484 350 8 5.700 4/29/2008


Issued: 2-16-96
Revised: 9-7-96, 6-8-98, 8-3-98, 8-28-01, 1-31-02, 7-29-02,9-11-02, 01-08-03 , 3-06-03,
1-27-04,3-23-04,11-15-04, 8-15-07 WR, 2-6-08 WR, 1-1-09 WR, 10-20-09 PC, 3-3-10 PC


R.R
H.P. Disp. C.R. Ind. Make Model Manifold Lifter Head cc Notes

200 265 10.7 PFI AC/Roch 17095240 12552137,10108630 1.5 H/R 45.5 1
260 350 10.1 PFI AC/Roch 12552138 1.50 H/R 62.0 1
275 350 9.9 PFI AC/Roch 17093107/170945053 10108471,10108629F 1.50 H/R 51.9 1
17094163/17108091 10108630,10208145
12552138
300 350 10.4 PFI AC/Roch 17093107/170945053 10108471,10108629F 1.50 H/R 51.9 1 17094163/17108091 10108630,10208145
12552138
330 350 10.8 PFI AC/Roch 17096246 12550631 1.60 H/R 51.9 1

Notes
1 - Throttle Bores - 2 x 1.889" (48mm)



Deck Piston

H.P. Disp. Cl Type Height Vol Valves Cam Lift Springs

200 265 .015 Flat w/n 1840/1500 418/430 Outer w Damp 1
260 350 .025 Flat w/n 1940/1500 418/430 Outer w Damp
275 350 .015 Flat w/n 1940/1500 449/460 Outer w Damp
300 350 .015 Flat w/n 1940/1500 449/460 Outer w Damp
330 350 .015 Flat w/n 2000/1550 476/479 Outer w Damp


Notes
1- Factory replacement piston is dished (2.5cc’s) with notches.


H.P. Disp. Gasket Head Cast

200 265 .025 12529742,10208890,12554291
260 350 .029 12554290, 10125320
275 350 .047 10205245,10128374,14088526,10207643,12551561,10207 640
300 350 .047 10205245,10128374,14088526,10207643,12551561,10207 640
330 350 .036 12555690,12555332


Cylinder Head Runner volumes

L99 175/63 CC

LT1 175/62 CC (Iron head)

LT1 175/68 CC (Aluminum head)

LT4 195/75 CC
View user's profile Send private message Send e-mail
PostPosted: Tue Feb 15, 2011 8:37 pm Reply with quote
Shon Herron
GM fanatic
Joined: 05 Mar 2006
Posts: 9807
Location: 29682




stock cc is 58 to 54 and the deck height is reported at .025:
http://www.camaroz28.com/forums/archive/index.php/t-52671.html

angel
View user's profile Send private message Send e-mail
LTx Shootout rules posted
FastGM.com Forum Index » Racers Lounge
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum
All times are GMT - 5 Hours  
Page 2 of 2  
Goto page Previous  1, 2
  
  
 Post new topic  Reply to topic  


Powered by phpBB © 2001-2004 phpBB Group

Totally optional donation link to help pay for the hosting costs, via paypal:

This site is in no way, shape or form a representation of GM, GMC, Chevrolet, Pontiac, Buick, Cadillac, or any other GM division. This site is privately owned and operated for the enjoyment and support of its members. All Trademarks are the property of their respective owners which are not affiliated with, do not sponsor or endorse, and are not responsible for the content of this web site.