What C4 for road course?
05-25-2016, 09:27 AM
#1
Burning Brakes
Thread Starter
What C4 for road course?
If you were going to build a car for SCCA and you were going to use a C4 what year, engine and why?
Im leaning towards a 92 to 96 LT1.
The LT4 cars are more expensive and harder to get parts for. I have one.
I have 5 sets of wheels that will fit a later C4 or C5. Big reason to stay later.
The LT1 is a little more power then the L98.
I think the suspension is better.
I like the later cars better
I can borrow parts from my 96 if needed.
Would you start with a z51 or z07 car if you can find one?
I don't want to go to C5. I also have one of them and it is to hard to work on.
I am comfortable doing anything on a C4. I hate working on the C5.
You have to own a lift to do anything on that car.
Im leaning towards a 92 to 96 LT1.
The LT4 cars are more expensive and harder to get parts for. I have one.
I have 5 sets of wheels that will fit a later C4 or C5. Big reason to stay later.
The LT1 is a little more power then the L98.
I think the suspension is better.
I like the later cars better
I can borrow parts from my 96 if needed.
Would you start with a z51 or z07 car if you can find one?
I don't want to go to C5. I also have one of them and it is to hard to work on.
I am comfortable doing anything on a C4. I hate working on the C5.
You have to own a lift to do anything on that car.
05-25-2016, 11:42 AM
#2
Drifting
If you were going to build a car for SCCA and you were going to use a C4 what year, engine and why?
Im leaning towards a 92 to 96 LT1.
The LT4 cars are more expensive and harder to get parts for. I have one.
I have 5 sets of wheels that will fit a later C4 or C5. Big reason to stay later.
The LT1 is a little more power then the L98.
I think the suspension is better.
I like the later cars better
I can borrow parts from my 96 if needed.
Would you start with a z51 or z07 car if you can find one?
I don't want to go to C5. I also have one of them and it is to hard to work on.
I am comfortable doing anything on a C4. I hate working on the C5.
You have to own a lift to do anything on that car.
Im leaning towards a 92 to 96 LT1.
The LT4 cars are more expensive and harder to get parts for. I have one.
I have 5 sets of wheels that will fit a later C4 or C5. Big reason to stay later.
The LT1 is a little more power then the L98.
I think the suspension is better.
I like the later cars better
I can borrow parts from my 96 if needed.
Would you start with a z51 or z07 car if you can find one?
I don't want to go to C5. I also have one of them and it is to hard to work on.
I am comfortable doing anything on a C4. I hate working on the C5.
You have to own a lift to do anything on that car.
The front and rear spring rates for the Z51/ZO7 packages and the respective vehicle weights are as follows:
89-628/330-3223
90-628/330-3255
91-885/330-3294
92-885/330-3327
93-797/330-3333
94-515/327-3309
95-515/327-3309
96-515/327-3327
The vehicle Wright's are for automatic tranny vehicles. Add 34 pounds for the ZF 6 speed tranny.
If you are going to stay stock with the LT1, I would compete with a 93 because the 93 LT1 had the better CAM profile with a better torque curve and better front spring rate. You will need to have special valve front shocks for that spring rate.
If you are not going to stay stock and going the Pro-Touring route pick the car with the less weight because you're going to change just about everything on car to aftermarket Go-Fast stuff.
If you do stay stock, I happen to have a set of Revolution 17X9 1/2 inch wheels with black 5 spoke centers with stock back spacing. These wheels are super light and a 3 piece wheel. They will need to be serviced and resealed.
Last edited by Nokones; 05-25-2016 at 11:50 AM.
05-25-2016, 12:15 PM
#3
Burning Brakes
Thread Starter
I think it would be better to start out in a stock class.
I don't know how stock that really is. Stilling trying to find out what all I can change.
Brake pads? Rotors? Power steering lines? Wheels? Seats? Shocks? Aluminum Flywheel?
Can you put 1996 Z51 springs on a 1995 car? Some times stock means stock to that model car and not that exact car.
17" wheels? Are you not allowed to run 18"
I don't know how stock that really is. Stilling trying to find out what all I can change.
Brake pads? Rotors? Power steering lines? Wheels? Seats? Shocks? Aluminum Flywheel?
Can you put 1996 Z51 springs on a 1995 car? Some times stock means stock to that model car and not that exact car.
17" wheels? Are you not allowed to run 18"
05-25-2016, 12:24 PM
#4
Burning Brakes
Thread Starter
I think I would be in Production or Touring based on the info on SCCA website.
Its not very clear. I want to run corvettes because that is what I know the most about and have the most parts for, plus I prefer them.
I want a lower level class since I am a novice.
I want the lest expensive.
Its not very clear. I want to run corvettes because that is what I know the most about and have the most parts for, plus I prefer them.
I want a lower level class since I am a novice.
I want the lest expensive.
05-25-2016, 12:40 PM
#6
Burning Brakes
Thread Starter
Im sure stock is a lot more then just a stock intake. Im 600 rwhp on stock intake. and can get to over 1000hp on stock intake.
Last edited by 2ooo-C5; 05-25-2016 at 12:41 PM.
05-25-2016, 12:56 PM
#7
Drifting
If you are putting 600 horsepower to the rear wheels, you can not run in stock even even with stock parts.
I believe the only class now for a C4 Corvette is GT1, a super modified class that will welcome 600 horsepower at the rear wheels. In some areas, that may not be enough horsepower in GT1.
05-25-2016, 01:11 PM
#9
Drifting
05-25-2016, 01:50 PM
#11
Burning Brakes
Thread Starter
There is no class for running a bone stock C4 in SCCA road racing. SCCA did away with Showroom Stock many years ago. In SCCA, stock means nothing more than factory stock parts for that model year vehicle.
If you are putting 600 horsepower to the rear wheels, you can not run in stock even even with stock parts.
I believe the only class now for a C4 Corvette is GT1, a super modified class that will welcome 600 horsepower at the rear wheels. In some areas, that may not be enough horsepower in GT1.
If you are putting 600 horsepower to the rear wheels, you can not run in stock even even with stock parts.
I believe the only class now for a C4 Corvette is GT1, a super modified class that will welcome 600 horsepower at the rear wheels. In some areas, that may not be enough horsepower in GT1.
05-25-2016, 01:52 PM
#12
Burning Brakes
Thread Starter
05-25-2016, 01:54 PM
#13
Burning Brakes
Thread Starter
Some how this went way off focus...
What CLASS do I want to build a C4 for?
What classes can I run a C4 in?
What is the best YEAR C4 to start with?
I see one vote for a 93 LT1 I vote 93 to 96 LT1.
This tells me nothing about where a C4 corvette would fit.
https://www.scca.com/pages/car-class...ons-and-groups
PRODUCTION seems the most likely place.
Series produced cars, which are allowed a range of performance modifications while retaining their original design, structure and drive layout. There is no age limit, such as Showroom Stock, so Production includes many cars as old as 50 years and as new as current body styles. The three performance potential based classes include: E Production (EP), F Production (FP) and H Production (HP).
EP is the fastest of the Production classes with HP running the slowest in the category. Several cars in the Production classes can be run in more than one class, just by changing the engine between races. The ease of engine changes allows many Production drivers to enter more than one class at the Runoffs each year. Cars included in Production classes come from a diverse group ranging from the MG Midget, Turner, Fiat X1/9, Alfa Romeo Spyder, Austin Healey Sprite, and Lotus Super 7 to the BMW 325, Mazda Miata, RX-7, Nissan 240, Honda Civic, Suzuki Swift GTI and Toyota MR-2.
What CLASS do I want to build a C4 for?
What classes can I run a C4 in?
What is the best YEAR C4 to start with?
I see one vote for a 93 LT1 I vote 93 to 96 LT1.
This tells me nothing about where a C4 corvette would fit.
https://www.scca.com/pages/car-class...ons-and-groups
PRODUCTION seems the most likely place.
Series produced cars, which are allowed a range of performance modifications while retaining their original design, structure and drive layout. There is no age limit, such as Showroom Stock, so Production includes many cars as old as 50 years and as new as current body styles. The three performance potential based classes include: E Production (EP), F Production (FP) and H Production (HP).
EP is the fastest of the Production classes with HP running the slowest in the category. Several cars in the Production classes can be run in more than one class, just by changing the engine between races. The ease of engine changes allows many Production drivers to enter more than one class at the Runoffs each year. Cars included in Production classes come from a diverse group ranging from the MG Midget, Turner, Fiat X1/9, Alfa Romeo Spyder, Austin Healey Sprite, and Lotus Super 7 to the BMW 325, Mazda Miata, RX-7, Nissan 240, Honda Civic, Suzuki Swift GTI and Toyota MR-2.
Last edited by 2ooo-C5; 05-25-2016 at 01:58 PM.
05-25-2016, 03:44 PM
#14
Drifting
A class for the C4 no longer exist in the Production Category. The remaining classes that are currently in Production Category are for the little cars. Back in the day, I believe the C4 Corvette would have run in the BP class. AP, BP, CP, and DP were eliminated many years ago.
The only class the C4 will fit in today is the GT1 class. I'm sure that they will let you compete in a stock C4 because not only you will be a Back Marker you may be a hazard by not being able to keep up.
So, if you intend to try road racing in SCCA with a Corvette, you better think about a C5 or newer Corvette or build a GT1 Corvette with a C4 Corvette. With that being said, if you still want to road race a C4 Corvette, it won't make a difference which C4 you get if you build one to the full extent of the GT1 rules.
The only class the C4 will fit in today is the GT1 class. I'm sure that they will let you compete in a stock C4 because not only you will be a Back Marker you may be a hazard by not being able to keep up.
So, if you intend to try road racing in SCCA with a Corvette, you better think about a C5 or newer Corvette or build a GT1 Corvette with a C4 Corvette. With that being said, if you still want to road race a C4 Corvette, it won't make a difference which C4 you get if you build one to the full extent of the GT1 rules.
05-25-2016, 10:02 PM
#19
Team Owner
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05-25-2016, 11:57 PM
#20
Melting Slicks
