It is best but not mandatory. You can bring it up to converter stall and launch from there but it is harder on parts(converter) than using a 2 step set a couple of hundred rpm below converter stall. Lamar

 

I have a 2-step but don't use it... I bring the motor up totally against the converter.

 

I use the 2-step. 4000rpm on a 5500rpm converter.

 

I had a 2 step and didnt use it also. My car launched better without flashing the converter any, but others run better with the 2 step. I guess you just have to try it and **** with it.

On my 2 step I didnt just run one RPM pill in it, I bought one of those selectable dials from MSD and ****ed with many different launch RPM's and it just launched better without it.

Shaun

 

Thanks yall. I just installed the C4 and transbrake and have not yet been to the track.

So once I am staged, I hit the TransBrake Button, press the gas pedal down and bring it up 'just a few hundred under stall speed', then when the light turns green release button and simultaneously put the gas to the Floor!

Is that right?

One other question, how quick is the shift to 2nd come?

 

Stage the car. Hit the button. You can now mash the gas(all the way). The car ain't movin' till you let go of the button. Just keep in mind that the esimated heat build up is about 10 degrees per second while on the brake with the converter loaded. Don't hold it with the converter loaded for long. If you were to stage with the trans at 160 degrees and hole it at full throttle for 5 seconds it would get to 210 degrees that quickly.

My method is to stage and hit the button. I stay at idle until I see the first amber bulb. I then mash the gas and wait for the last amber for the release. It works well for me and I'm not loading the converter more than one and a half seconds. Your release time may vary from mine but you get the idea.

 

I run a delay box so I push the button then let go of it on the first amber then second amber mat the gas. Green away we go.

 

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On the street you would blow the tires off most likely.

 

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I have seen plenty of cars leave off a break on the street and if you do it right it will hook, all depends how it is after the 60ft thats usually where you spin.

Maybe you should understand how a transbrake works. It locks the trans in low gear and reverse gear at the same time. It has nothing to do with the stall speed or traction. When the transbrake button is released, the reverse clutch releases and lets the low gear move the car. With a high stall converter, it feels very much like dumping a clutch at 5500rpm. It will hit the tires nearly instantly. Traction on the street is as much a problem as it would be if you dump the clutch with a stick at 5500rpm. My own car will hook great on the track but if I tried to launch the same way on the street, it wouldn't even be close to hooking, slicks or not. Maybe with a low stall converter the tires wouldn't get hit as hard with the engine well under it's power band.

 

sorry I guess i worded it wrong, I know how the transbrake works I just have never used one and don't know how it feels or how its used, I know its like dumping the clutch and if you do a good burnout in some traction compound and back up into the tracks you can get pretty good traction on the street, again most of the cars I have seen do this have ladder bars or are built to race on the street so they are tuned to work on the street.

 

Using a 2step will also allow the converter to hit a bit harder.

 

2 Step also can allow you to adjust your reaction times a bit. I run a MSD Digital 6 box with built in 2 step. I can adjust it from 1500 rpms all the way up to like 7k rpms or something. I currently run it at 4200 rpms and I think my converter will push to about 4500 rpms or so. 4200 works well for me on a .400 pro tree. I can go lower if I run a .500 pro tree or a sportsman tree so the car doesn't move quite as quick.