NCCC Mods
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 851
Likes: 103
From: St Louis, MO
NCCC Mods
Does anyone know if you add an LS6 intake manifold to a 98 LS1 motor, will this put the car in a group 3 classification at the NCCC sponsored race events.
If this modification classifies the car as a group 3, is a roll bar required in the car.
I want to install an intake, heads and cam but do not want to install a rollbar in the car.
I don't know why an ls6 intake would make a difference if you still have less hp then the z06.
Please help before I go ahead with my mods.
If this modification classifies the car as a group 3, is a roll bar required in the car.
I want to install an intake, heads and cam but do not want to install a rollbar in the car.
I don't know why an ls6 intake would make a difference if you still have less hp then the z06.
Please help before I go ahead with my mods.
Racer
Joined: Mar 2004
Posts: 436
Likes: 1
From: Fort Lauderdale FL
St. Jude Donor '06
Originally Posted by jjk2509
Does anyone know if you add an LS6 intake manifold to a 98 LS1 motor, will this put the car in a group 3 classification at the NCCC sponsored race events.
If this modification classifies the car as a group 3, is a roll bar required in the car.
I want to install an intake, heads and cam but do not want to install a rollbar in the car.
I don't know why an ls6 intake would make a difference if you still have less hp then the z06.
Please help before I go ahead with my mods.
If this modification classifies the car as a group 3, is a roll bar required in the car.
I want to install an intake, heads and cam but do not want to install a rollbar in the car.
I don't know why an ls6 intake would make a difference if you still have less hp then the z06.
Please help before I go ahead with my mods.
http://www.westregionnccc.com/
Safety Car
Joined: Nov 2000
Posts: 4,549
Likes: 30
From: Shenandoah Valley Virginia
Unfortunately that modification will place you in a Group III classification. The NCCC rule book states that Group I is completely stock for the fuel delivery system - includes manifold. Group II you can update or backdate parts within class. The LS6 manifold is from a ZO6 which is a Class J your LS1 is a class H so the swap would not be allowed even in Group II, that leaves only III. 
Group III requires substantial safety equipment IE: roll cage, fire extinguisher system, driver fire suit, etc.
Group III requires substantial safety equipment IE: roll cage, fire extinguisher system, driver fire suit, etc.
Drifting
Joined: Feb 2002
Posts: 1,422
Likes: 4
From: Schererville Indiana
Senior Member
Cruise-In V Veteran
Originally Posted by CHJ In Virginia
Unfortunately that modification will place you in a Group III classification. The NCCC rule book states that Group I is completely stock for the fuel delivery system - includes manifold. Group II you can update or backdate parts within class. The LS6 manifold is from a ZO6 which is a Class J your LS1 is a class H so the swap would not be allowed even in Group II, that leaves only III. Group III requires substantial safety equipment IE: roll cage, fire extinguisher system, driver fire suit, etc.
Group III requires substantial safety equipment IE: roll cage, fire extinguisher system, driver fire suit, etc.
Drifting
Joined: Sep 2000
Posts: 1,456
Likes: 5
From: Bothell WA
Originally Posted by CHJ In Virginia
Unfortunately that modification will place you in a Group III classification. The NCCC rule book states that Group I is completely stock for the fuel delivery system - includes manifold. Group II you can update or backdate parts within class. The LS6 manifold is from a ZO6 which is a Class J your LS1 is a class H so the swap would not be allowed even in Group II, that leaves only III. Group III requires substantial safety equipment IE: roll cage, fire extinguisher system, driver fire suit, etc.
Group III requires substantial safety equipment IE: roll cage, fire extinguisher system, driver fire suit, etc.Just a couple of clarifications, in Group 3, you need a 4 point roll bar as minimum, not a full cage. You also only need to wear a fire suit for high speed events. A fire suit is not required for low speed events which most autocrosses are classified as.
- Mark
Drifting
Joined: Feb 2002
Posts: 1,422
Likes: 4
From: Schererville Indiana
Senior Member
Cruise-In V Veteran
Stock C5's are group I H cars. Stock Z06's are group I J cars. Modified C5's and modified Z06's can run group II H.
I dont believe any car has to have a roll bar or cage for low speed events except maybe a race prepaired car.
I dont believe any car has to have a roll bar or cage for low speed events except maybe a race prepaired car.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Le Mans Master
Joined: Sep 2003
Posts: 5,374
Likes: 0
From: Jacksonville Florida
Originally Posted by CHJ In Virginia
Unfortunately that modification will place you in a Group III classification. The NCCC rule book states that Group I is completely stock for the fuel delivery system - includes manifold. Group II you can update or backdate parts within class. The LS6 manifold is from a ZO6 which is a Class J your LS1 is a class H so the swap would not be allowed even in Group II, that leaves only III. Group III requires substantial safety equipment IE: roll cage, fire extinguisher system, driver fire suit, etc.
Group III requires substantial safety equipment IE: roll cage, fire extinguisher system, driver fire suit, etc.This seems like a quirk in the system. A bone-stock 2000 LS1 (345HP) next to a bone-stock 2002 LS1 (350HP) already has the difference between and LS1 intake manifold and an LS6 manifold. If the 2000 puts on the same manifold as the 2002 - he gets bumped all the way into Group III which requires all the safety equipment while the 2002 runs stock? That doesn't seem equitable. The only difference is who put the manifold on the car - the owner or GM. The LS6 intake manifold is not just from a Z06 - it was put on LS1s by GM in late 01 on.
If this is correct, it knocks me completely out of even considering NCCC autocross as I'm not interested in putting a roll cage in my car. Technically, my car would be bumped up a class by the SCCA not due to the manifold - but due to the rear sway bar replacement.
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 851
Likes: 103
From: St Louis, MO
Nccc
Originally Posted by NV MY C5
Stock C5's are group I H cars. Stock Z06's are group I J cars. Modified C5's and modified Z06's can run group II H.
I dont believe any car has to have a roll bar or cage for low speed events except maybe a race prepaired car.
I dont believe any car has to have a roll bar or cage for low speed events except maybe a race prepaired car.
If the above threads are accurate, you would not be in group III.
I sent an e-mail to Tim (NCCC Regional) from above and will post his response.
Instructor
Joined: Jun 2003
Posts: 115
Likes: 0
From: Savannah MO
Class bump
If this does bump you to class III a cage is NOT required it is reccommended according to the 04-07 rules. I have been researching this to see where the III/RP line is. If you jump to RP you are required to have a cage. Wolfe Racing makes a nice cage that is allowed and it is bolt in, the price is under a grand also.
Drifting
Joined: Feb 2002
Posts: 1,422
Likes: 4
From: Schererville Indiana
Senior Member
Cruise-In V Veteran
Originally Posted by jjk2509
If the above threads are accurate, you would not be in group III.
I sent an e-mail to Tim (NCCC Regional) from above and will post his response.
I sent an e-mail to Tim (NCCC Regional) from above and will post his response.
Thread Starter
Burning Brakes
Joined: Jan 2004
Posts: 851
Likes: 103
From: St Louis, MO
Nccc
Originally Posted by NV MY C5
No, you would both be in group II H. An air intake, which is most commenly done as a first mod also puts you into group II H.
Drifting
Joined: Feb 2002
Posts: 1,422
Likes: 4
From: Schererville Indiana
Senior Member
Cruise-In V Veteran
Originally Posted by jjk2509
Can you do anything to your heads and or cam and stay in group II?
Hope this helps and not confuses.
