what eckard said. brake boosters work off engine vaccum. so under hard acceleration you can not have enough vaccum. especially in race cars which are heavily cammed. like a lot of times youll read about aftermarket cams being streetable and thats part of what theyre talking about. streetable cams will allow the engine to pull significant vaccum at idle to help the brake booster. race cams have too much lift duration and overlap to pull good vaccum at idle, so you often have to pump the brakes to make sure you have good pressure before you need to brake. especially when accelerating on a longer straight. long explanation but hopefully you learned something lol
+2Air A late reply, but to add to what Mike said it also pushes the pads closer to the disc/rotor. When raining, it also helps dry the rotors slightly before full braking is required.
Another late reply. Deflection occurs between the brake rotor and pads which pushes the pads further away from the rotor, on that last corner he's full tilt so he's taking out that play in the pads and as stated adding some pressure back in the lines as well. Most racing brake calipers will have what are referred to as anti-knock back springs in the caliper that sit in the rear of brake caliper piston which help[s to prevent this, I'd suspect this car has them and just needs a light tap to get the pads back into position. with the AKB springs helping. If you ever watch any V8 Super car you'll see them doing the same thing after long straights. Perfect example - th-cam.com/video/qdWSyrqEnE4/w-d-xo.html
I have a common sportbike with a sequential transmission. If I blip the throttle while engine braking just a moment before I downshift, I can smoothly shift without the clutch. Why can't the driver do that in this car?
Heel-toeing is the more consistent way to do it. Especially in a rear-engined Porsche, you get that shit wrong and you can lock the rear wheels for even a split second, and that car might be going off into the wall.
@@FearlessLeader2001 Good point. I heel-toe in the down-shift more often with a non-syncro 18-speed Eaton Fuller with clutch for a smooth down change, and often just ease off the throttle or blip a bit for the up-shift with either no or minimal clutch. A Holinger isn't much different.
it is a 997.1 or a 997.2 with the pole shifter . Many were converted to paddle shift like my 2012 997.2 which also has auto blipping so you only need to use clutch only for downshifting on warm up laps
@@EclipseTurboGST It's a sequential transmission. Think of it like a quickshifter with throttle interrupt on something like a motorcycle. Flat upshifting, but you have to clutch and rev-match the downshift.
All around best. Video, split screen, audio, competitive driving, came looking for some downshift technique. Went away happy. Shalom
Now that's a proper way to change gears
Lmao I caught myself tilting my phone on the turns trying to hit the apex with this man😂
Fuji, awesome track.
Why do you tap the brake a couple of times on the back straight?
Is there a reason? traction or?
Brake pressure! loading it up for more effective braking. Or fluid in the brake line.
what eckard said. brake boosters work off engine vaccum. so under hard acceleration you can not have enough vaccum. especially in race cars which are heavily cammed. like a lot of times youll read about aftermarket cams being streetable and thats part of what theyre talking about. streetable cams will allow the engine to pull significant vaccum at idle to help the brake booster. race cams have too much lift duration and overlap to pull good vaccum at idle, so you often have to pump the brakes to make sure you have good pressure before you need to brake. especially when accelerating on a longer straight.
long explanation but hopefully you learned something lol
+2Air A late reply, but to add to what Mike said it also pushes the pads closer to the disc/rotor. When raining, it also helps dry the rotors slightly before full braking is required.
Another late reply. Deflection occurs between the brake rotor and pads which pushes the pads further away from the rotor, on that last corner he's full tilt so he's taking out that play in the pads and as stated adding some pressure back in the lines as well. Most racing brake calipers will have what are referred to as anti-knock back springs in the caliper that sit in the rear of brake caliper piston which help[s to prevent this, I'd suspect this car has them and just needs a light tap to get the pads back into position. with the AKB springs helping. If you ever watch any V8 Super car you'll see them doing the same thing after long straights.
Perfect example - th-cam.com/video/qdWSyrqEnE4/w-d-xo.html
Rip headphones 🎧
I have a common sportbike with a sequential transmission. If I blip the throttle while engine braking just a moment before I downshift, I can smoothly shift without the clutch. Why can't the driver do that in this car?
Theoretically you could do it but it doesn't make sense because the Car is way heavier and the engine has more momentum.
you should easily be able to.. not sure why this person isnt as long as you match the revs itll go in now problem and shouldnt upset the car at all
Heel-toeing is the more consistent way to do it. Especially in a rear-engined Porsche, you get that shit wrong and you can lock the rear wheels for even a split second, and that car might be going off into the wall.
@@FearlessLeader2001 Good point. I heel-toe in the down-shift more often with a non-syncro 18-speed Eaton Fuller with clutch for a smooth down change, and often just ease off the throttle or blip a bit for the up-shift with either no or minimal clutch. A Holinger isn't much different.
It's a 997 GT3 cup right?
I think so
it is a 997.1 or a 997.2 with the pole shifter . Many were converted to paddle shift like my 2012 997.2 which also has auto blipping so you only need to use clutch only for downshifting on warm up laps
Please explain why does it seem like u shift w out the clutch?
It's just like shifting those arcade racing style shifters :) very very simple, though it looks very complicated.
tilt it up for downshift tilt it down for upshift.
Thanxs
It kind of seems that he only uses the clutch for downshifting. When upshifting he does not touch clutch pedal. Confusing :)
@@EclipseTurboGST It's a sequential transmission. Think of it like a quickshifter with throttle interrupt on something like a motorcycle. Flat upshifting, but you have to clutch and rev-match the downshift.