CLASS RACER FORUM - View Single Post - Does anyone run a transbrake with a BBC in Super Stock

Alan Roehrich · 01-26-2012, 04:03 PM

I've been building racing automatic transmissions since around 1988 or so.

Most of the faster cars I'm aware of are footbrake cars. This has been the case for a long time, at least 20 years that I can remember, and we tried it often, with some very fast cars.

The only thing a transbrake is likely to hurt is the direct clutches, they'll wear approximately 50% faster with most transbrakes. This is simply due to the fact that it is very difficult to get a truly clean release of the direct clutches.

The only super clean release 3 speed automatic transbrake I'm aware of is the Griner, which is about 3 times the cost of the next best brake I've used, the ATI.

Currently the most consistent results I've seen with footbrake cars are those where the two step works off of a switch on the brake pedal itself, the brake pedal arm (the way a stock GM brake light switch works) or off of a brake fluid pressure switch.

While it is possible to be fairly consistent using your finger on a button and your foot on the brake pedal, it would be difficult to dispute that the best possible consistency comes from the fewest motions and the least amount of motion. You'll have to decide how well you can do and how consistent you can be performing two operations at once, with different parts of your body, while trying to concentrate on the starting line.

We race a big block Chevy powered Super Stock Camaro. We run just a switch on the brake pedal. It's set up exactly like the big block Chevy powered Stock Eliminator powered Camaro we race.

Many of the people you see with a finger operated switch are actually using it as a safety device. They hold that switch on the starting line so their two step will come on, but the actually turn the two step off on the launch with the brake pedal. They release the finger activated button so that the two step cannot come back on down track if they use the brakes at or near the finish line, as it is illegal to use a two step down track in Stock and Super Stock, and it can be dangerous to do so, as it can damage the engine, and even cause the car to get loose.

01-26-2012, 04:03 PM	#6
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,090 Likes: 1,534 Liked 1,758 Times in 398 Posts	Re: Does anyone run a transbrake with a BBC in Super Stock I've been building racing automatic transmissions since around 1988 or so. Most of the faster cars I'm aware of are footbrake cars. This has been the case for a long time, at least 20 years that I can remember, and we tried it often, with some very fast cars. The only thing a transbrake is likely to hurt is the direct clutches, they'll wear approximately 50% faster with most transbrakes. This is simply due to the fact that it is very difficult to get a truly clean release of the direct clutches. The only super clean release 3 speed automatic transbrake I'm aware of is the Griner, which is about 3 times the cost of the next best brake I've used, the ATI. Currently the most consistent results I've seen with footbrake cars are those where the two step works off of a switch on the brake pedal itself, the brake pedal arm (the way a stock GM brake light switch works) or off of a brake fluid pressure switch. While it is possible to be fairly consistent using your finger on a button and your foot on the brake pedal, it would be difficult to dispute that the best possible consistency comes from the fewest motions and the least amount of motion. You'll have to decide how well you can do and how consistent you can be performing two operations at once, with different parts of your body, while trying to concentrate on the starting line. We race a big block Chevy powered Super Stock Camaro. We run just a switch on the brake pedal. It's set up exactly like the big block Chevy powered Stock Eliminator powered Camaro we race. Many of the people you see with a finger operated switch are actually using it as a safety device. They hold that switch on the starting line so their two step will come on, but the actually turn the two step off on the launch with the brake pedal. They release the finger activated button so that the two step cannot come back on down track if they use the brakes at or near the finish line, as it is illegal to use a two step down track in Stock and Super Stock, and it can be dangerous to do so, as it can damage the engine, and even cause the car to get loose. __________________ Alan Roehrich 212A G/S