Sau:nsw Mdtc Wrap Up Thread

[Yeedogga]

Thought id jump on the YouTube bandwagon!

This is taken from my 'black box' recorder i bought online. Its not super good quality but its a neat little recorder with built-in GPS and stuff!

Commentary in the video is courtesy of my mate Tom in the passenger seat hahaha

[BunsenBurna]

Last session of the day for me in my super slow R32 GTR. My passenger and I with our girths combined weigh over 200kgs so this is close to a 2 tonne tank on 245 Federal 595 SS tyres.

First go with the Contour GPS camera and Dashware too.

[bored33]

Nice videos guys! Can't wait for the next track event. Should be able to join in!

[Duncan]

I got 135 by the end of the straight, High score?

for sure...if you beat the z's speed you are a winnah! that thing was crazy

[R32 Zilla]

Awesome day. Thanks to those who made it possible. Because of the wet track I learnt a heap about the handling of my car and it was a whole lot of fun. It was the first time id had it on a circuit (appart from Canberra Texi back track about 3 years ago) and i was very surprised how well it handled such a wet track. Although I dont think my new found power assisted in any way! A very well run day and id certainly do it again with a wet or dry track.

Tim.

[Pezhead]

Ok, so I know you guys are going to HATE me but I felt I needed to share this. I got to go back out on Monday to MDTC and it was mostly dry day so very little standing water on the track.

Oh let me tell you how fun this track is in the dry!

My Best Wet Lap on Saturday was a 50.8 and my best on Monday in the dry was a 45.5

These weren't the fastest laps but it got so fun sliding the GTR around in the dry that I really stopped caring about the times.

If you get bored be sure you fast forward to last 1/2 of the video - that front angle is fantastic for showing how it "feels" to drive.

[hamiltonau]

love your work Eric, gotta admit i jumped to the 2nd half for the edge of your seat camera angles, in fact this thread has turned into t a great compare of video brands, angles and placement.

I think im going have to hand out some awards here..

Best Quality picture goes to.... Contour HD

Best camera placement and field of view ....GoPro

Best off camera commentary......Black box

(eg. "F**k me dead bro..its F**king INSANE, the font wheel drift is F**king INCREDIBLE!")

gold..

[Pezhead]

Well don't judge the picture quality by the streaming stuff we put up. The original cut was 1 gig for 7 minute and Vimeo spat the dummy. I had to drastically reduce the quality to get the whole thing up. You should see the high quality version.

[BunsenBurna]

Looks great Eric, definitely some quick laps going on there! How's the front right tyre?!?! At times looks like it is coming away from the rim a little bit under extreme cornering.

Not sure if I've posted the image properly but I love it!

[Yeedogga]

Best off camera commentary......Black box

(eg. "F**k me dead bro..its F**king INSANE, the font wheel GRIP is F**king INCREDIBLE!")

gold..

Fixed! haha- aint no AWD-style understeering shenanigans here!

[Pezhead]

Yeah, I was amazed at how much the front and rear tyres pull away from the rim. Not too shabby too for 6 year old Pirelli's! (Hey they were UBER cheap).

I have some wet footage too but it isn't nearly as impressive. I have to say that the track is a totally different experience in the dry. I started the second day working the speed up since my previous experience was in the wet. The Grip level on the track, as you can see, is terrific. You can really push the car to the limits and there are really only a few spots where it might get away from you. The rest of the track is Go HARD GO GO GO!

First session of the day on the dry yeilded a 48.4 and that got down to 45.5 before I started getting too enamoured with sliding around to care about track times. Happy when the lap times drop that much!

[Duncan]

good work Eric....looking forward to doing it in the dry one day too!

But for now it's Wakefield next in December....

[The Bogan]

I am so looking forward to Wakefield, I may/or may not beat my PB, should be the last outing for my old semis though, some new Khumos should be good though.

That's if I get more than 3 laps.

[Pezhead]

I didn't take a lot of pictures during the event, but I did manage just a few snaps. Who else got pictures? Anybody get some nice shots of my car?

and last one... How'd they make GD2ILA shuddup!

[Duncan]

Oh....I owe a description on 'heel-toeing'!

So you are cruising along at, say, 80klm/h. If you are on the road, you are probably in 4th gear at about 2000rpm. But you could also be in 3rd at about 4000rpm or even 2nd at about 6000rpm if you feel nasty.

Now put yourself on a race track, heading towards a corner where you know you need 2nd gear....but you are in 3rd.

When you are ready to hit the brakes, there is lots to do.....pick the right braking point, brake hard enough to make the corner, pick the right turn in point, look at the apex and corner exits. And of course get back to 2nd gear to exit the corner without bogging down!

So, you hit the brakes, clutch in, back to 2nd gear, clutch out....and you head backwards off the track. (or more likely, you hear a brief chirp and a wiggle from the rear and you get away with it).

The problem is, you have changed from 3rd to 2nd in say 1/2 a second, forcing the engine to accelerate from 4000rpm to 6000rpm in the same time. It can't speed that quickly and the rear tyres lose traction (compression lock) until the engine gets to the right revs.

The good news is, it is easily fixed and avoided, in 2 ways. The best way is to learn to heel-toe, and practice it whenever you can. Simply, heel-toeing is having one part of your right foot (normally the ball/toes) firmly on the brake, and without lifting off the brake, use your heel to blip the throttle while the clutch is out. If you rev the motor from 4000 to 6000, then let the clutch out, you will get a beautiful smooth downshift, and still be braking hard all the way. In fact if you get the revs spot on you won't need the clutch to select the new gear at all.

The other way to avoid compression lock is to change down gears late in your braking. Easier technique but hard to time and still not as smooth as heel-toeing. If you wait until you are travelling at say 50 instead of 80, you are less likely to lock the wheels because the engine has to change less revs when you change gear (eg 3000->2000 instead of 6000->4000), you will just challenge the gearbox synchros more. If you aren't confident with heel toeing, you must change down gears late in your braking to drive safely on the track!

Unfortunately....the track is the easiest place to practice heel-toeing because there is a large change between gears. You can and should practice on the street, but when you only have to blip the throttle 500 revs instead of 2000 it is tricker to get get spot on. Even so.....give it a go every time you can!

Edited August 26, 2011 by Duncan
backwards!

[Pezhead]

So, even though I know I'll get no end of ribbing I've put together a few of those "Moment" clips for your enjoyment.

[Mosullivan]

Wow you're calm when the shit hits the fan

I tend to yell a lot more than that

[Aggroman]

Oh....I owe a description on 'heel-toeing'!

So you are cruising along at, say, 80klm/h. If you are on the road, you are probably in 4th gear at about 2000rpm. But you could also be in 3rd at about 4000rpm or even 2nd at about 6000rpm if you feel nasty.

Now put yourself on a race track, heading towards a corner where you know you need 2nd gear....but you are in 3rd.

When you are ready to hit the brakes, there is lots to do.....pick the right braking point, brake hard enough to make the corner, pick the right turn in point, look at the apex and corner exits. And of course get back to 2nd gear to exit the corner without bogging down!

So, you hit the brakes, clutch in, back to 2nd gear, clutch out....and you head backwards off the track. (or more likely, you hear a brief chirp and a wiggle from the rear and you get away with it).

The problem is, you have changed from 3rd to 2nd in say 1/2 a second, forcing the engine to slow from 6000rpm to 4000rpm in the same time. It can't slow that quickly and the rear tyres lose traction (compression lock) until the engine gets to the right revs.

The good news is, it is easily fixed and avoided, in 2 ways. The best way is to learn to heel-toe, and practice it whenever you can. Simply, heel-toeing is having one part of your right foot (normally the ball/toes) firmly on the brake, and without lifting off the brake, use your heel to blip the throttle while the clutch is out. If you rev the motor from 4000 to 6000, then let the clutch out, you will get a beautiful smooth downshift, and still be braking hard all the way. In fact if you get the revs spot on you won't need the clutch to select the new gear at all.

The other way to avoid compression lock is to change down gears late in your braking. Easier technique but hard to time and still not as smooth as heel-toeing. If you wait until you are travelling at say 50 instead of 80, you are less likely to lock the wheels because the engine has to change less revs when you change gear (eg 3000->2000 instead of 6000->4000), you will just challenge the gearbox synchros more. If you aren't confident with heel toeing, you must change down gears late in your braking to drive safely on the track!

Unfortunately....the track is the easiest place to practice heel-toeing because there is a large change between gears. You can and should practice on the street, but when you only have to blip the throttle 500 revs instead of 2000 it is tricker to get get spot on. Even so.....give it a go every time you can!

umm dunc isnt it the other way around.. you are going from lower revs to higher revs and the engine cant speed up fast enough and hence causes compression lockup from the synchros not matching fast enough..

[GoldZilla]

Dave, if you've got to the point of compression locking, that means that you've managed to get past the synchros, got the car in gear, but the revs are still too high for the wheel speed.

Also, further to Duncan's post, learning to correctly heel-and-toe early before you get into a corner will help with engine braking, taking some of the pressure (and therefore heat) off your brakes.

[Ruxis]

Thanks Duncan,

Maybe that's why my clutch is making a strange humming noise now lol.

Think I stuffed it, in reverse with my foot on the clutch is hums, take my foot of the clutch an put it in neutral and it goes away. Only in reverse too.

Synchos maybe?? Or clutch?