Knight Viper
Viper Owner
Brain, it been said but thanks for the awesome post and pics
Did you mean to say "isn't" part of the braking system?- The transmission is part of the braking system.
Nope. I always thought that compression braking was a big no-no (which is correct thinking on the street) but every driver I talked to, including Skip himself, agree that engaging the gear in the lower RPM band not only helps slow the car down, but also helps seat the tires for the turn. One of my more spectacular offroad excursions happened when I approched turn one at 135mph and threashold braked to the 100ft marker. I got distracted by my comm system shorting out in my ear and completely forgot to downshift. The brakes themselves didn't have enough in them to stop me from plowing right into the field. I had been threshold and 3rd shift compression braking there all day for some seriously deep entries - without the engine helping, my car became a lawnmower.
Nope. I always thought that compression braking was a big no-no (which is correct thinking on the street) but every driver I talked to, including Skip himself, agree that engaging the gear in the lower RPM band not only helps slow the car down, but also helps seat the tires for the turn. One of my more spectacular offroad excursions happened when I approched turn one at 135mph and threashold braked to the 100ft marker. I got distracted by my comm system shorting out in my ear and completely forgot to downshift. The brakes themselves didn't have enough in them to stop me from plowing right into the field. I had been threshold and 3rd shift compression braking there all day for some seriously deep entries - without the engine helping, my car became a lawnmower.
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Using your transmission to slow you down on a roadcourse is a bad habit that you don't want to promote. Your Viper became a lawnmower because of that and not because the brakes don't have enough in them to slow you down.
Brake pads are much cheaper than repairing your transmission from undue stress that's not needed. Using the trans to slow you down is also the best way to unbalance the car, lock up your rear tires and spin out.
You don't make up alot of time under braking into a turn. More emphasis should be placed on balance, matching your rpms into the turn and getting on the gas sooner for a better exit out of the turn.
One concession though - considering this technique is used to teach newbies it probably does go in the face of advanced motorsports. But for those new to the track who need to be in the correct gear coming out of the corner it's a fairly straight-forward technique that's easy to impliment. Attempting heel-toe, revmatching, or drift-shifting turn would be way more dangerious to a greenhorn than possibly damaging the valve-train.
Gavin - slight mis-interpretation. I said the transmission was part of the braking system not in lue of the braking system. There's no chance of over-revving or reversing traction at these speeds.
Now here's the annoying thing. I was told this first session of the first day. I asked Skip, nine of the VRL drivers, four of the White Class drivers, seven instructors, and Tom Sessions himself and every single one of them agreed with the system being used. I spent over 110 miles re-programming my driving as such. Forgive me, but it worked on the track and endorsed by the people driving there so I'll stick with it for now.
One concession though - considering this technique is used to teach newbies it probably does go in the face of advanced motorsports. But for those new to the track who need to be in the correct gear coming out of the corner it's a fairly straight-forward technique that's easy to impliment. Attempting heel-toe, revmatching, or drift-shifting turn would be way more dangerious to a greenhorn than possibly damaging the valve-train.
Anyone who has driven a viper knows that the rears do not threshold anywhere near the same speed as the fronts. In fact until Tom's 40mm brake install I could never get the rear to hook up in the same ballpark as the fronts in terms of relative speed. You either threshold with the fronts or you lock the fronts and threshold with the rear. Therefore compromising the integrity of the rear tires under threshold does little to the overall grip of the car.We would all agree the brakes are at their most effective when the rears are at threshold and the fronts are at threshold.
If I'm reading this correctly you flatly admit to downshifting during your final braking procedure. Otherwise what you are saying is to brake, enter corner, lift off of brake and downshift, then throttle - which I see as a perfect recipe for de-stabilizing the chassis.Note: shifting is the last thing you do before letting off the brake, getting back onto the throttle (even throttle).
But under that logic wouldn't the best advice simply to be to slow down altogether? If I can get another 50-100ft deeper into the corner via threshold/compression that's another 50-100ft against the clock. The whole goal of the class was to learn to maximize the use of the car AND the entirety of the asphalt.If the car is unable to stop in time to make the corner, the best advice would be to move the braking point back, would it not?
While this is partially true, NEVER EVER try to disagree with an instrcutors instruction while on track doing whatever it is he/she is telling you to do. This can have devastating effects.
BTW, Bonkers, I think I was your instructor for the second half of the day on Saturday(until my M3 blew up!)
While this is partially true, NEVER EVER try to disagree with an instrcutors instruction while on track doing whatever it is he/she is telling you to do. This can have devastating effects.
I stand corrected. You're absolutely right - I should have stated that better.
BTW, Bonkers, I think I was your instructor for the second half of the day on Saturday(until my M3 blew up!)
I think you may have been. Right up until the red flag right? I have to extend my thanks to you yet again Eric, I shaved huge chunks of of time under your instruction. I was literally not having an ounce of fun with the first guy and swapping up made all the difference in the weekend.
Thats great to hear, I had a BLAST riding with you, and You really made some great progress, sorry to hear you had an off after I left though!
"shifting is the last thing you do before you turn into the corner"
I have to disagree.
But we do agree that less time on the brakes and shorter braking distance will increase overall speed. Anything that contributes to this is positive.
Don't tell F1 and Superbike (or any other road race venue for that matter) that you can't engine brake.
Engine braking can be as simple as lifting off the gas or as aggressive as early downshifting. Either way, it helps to slow the car and done properly, it will shorten braking distance. If you match revs, tires do not lock up, the car does not over rev and there is less wear on the clutch, etc.
Done improperly, you can destabilize the car (leading to bad things). Clutch slips (wear), tires lockup, engine may over rev.