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Discussion Starter #282
If it was just the left side glowing like a pool of molten lava, it's probably a jammed-up caliper or caliper piston(s).
I didn't notice it at the time - brakes pulled me down nice and square from 150 kph

I didn't notice anything until I saw the photo - done a couple of brake downs from 70 kph - no sign of anything - both discs too hot to touch but not instant frazzle
 

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What are the chances that you are seeing a reflection of the safety cone in the nice shiny brake disk? It seems a bit of a stretch, but maybe..?


Bill
 

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What are the chances that you are seeing a reflection of the safety cone in the nice shiny brake disk? It seems a bit of a stretch, but maybe..?


Bill


I think you are on the money.


I don't know about the cone part but I am convinced it is reflection. There are a couple of reasons.
1. The colour is consistant with the reflection on the other components like the wheel rim.
2. Take a closer look at the bottom right of the disc, just where it goes behind the spoke of the wheel. there is a portion there that is not orange. If it were glowing hot it would be consistant across the whole disc.


I think Duncan is safe......well safe from melting discs anyway.
 

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What are the chances that you are seeing a reflection of the safety cone in the nice shiny brake disk? It seems a bit of a stretch, but maybe..?
[Edited to add - Damnit, galderdi beat me to the same observations by 30 seconds while I was typing]

At first I laughed it off, as of course that's not happening... but...



1 - Why is the outside of the black rim orange/red? That's not reflected light from inside the wheel well.

2 - Why is the rightmost edge of the discbrake not orange, but grey?

3 - Why is the top of the disc brake only slightly warm, but the bottom glowing bright?

...

Was there bychance also an orange sandfence or safety fence nearby?

Alternatively, cameras pick up infrared much easier than our eyes do. Something that appears to emit zero heat light yet, will often show up as pink/purple/orange on a camera that has weak infrared filtering (nearly all cameras, if you point a TV remote at your camera in video mode, and hit some buttons, note that it lights up white hot on your camera screen).
 

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Oh and I just noticed the top of the disc (through the gap in the wheel) is also not glowing. So again I can't see how it could be heat.
 

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Discussion Starter #287
What are the chances that you are seeing a reflection of the safety cone in the nice shiny brake disk? It seems a bit of a stretch, but maybe..?


Bill
I have never heard of that before - BUT there is orange on the rim of the wheel and on the polished black "spoke"

And none of the smell and smoke I would associate with a disc that was actually orange hot

None of the other cars showed anything

I think that you may be right!
 

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Discussion Starter #289
Thanks guys for your comments - I do feel much better about that now

- I'm down to 7.90 seconds - how do I get down even further?
 

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Thanks guys for your comments - I do feel much better about that now

- I'm down to 7.90 seconds - how do I get down even further?

Aero? I am not talking about downforce. I mean streamlining. At those speeds don't underestimate how much power it takes to overcome every bit of wind resistance.


The balancing act is making some improvements that are either compatible with your normal use of the car or able to be applied on the morning of your events.


Your nose is good.
The front wheels are a problem area but I'm not sure what you could do there short of a whole new front clip.
The passenger area is a fairly easy fix. Get some 0.4 mm polycarbonate and make some covers to extend the bonnet and sides to bridge the gap where the passenger seat is.
Temporarily remove the passenger side headrest. It doesn't sound like much but try puting your palm against the wind at 130kmph and you'll see how much power it is sucking.
Remove the passenger side windscreen for these events.
I would make an alternate driver side windscreen which would extend up as high as you can cope with. Try and get it high enough to divert the air over your head.
The rear of the car possibly has some potential too but would take significant effort like making a streamlined tail to reduce the eddies behind the boot.


Please don't take this as criticism. I think the car is awesome just as it is. But we are always seeking those next few %
 

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Discussion Starter #293
Excellent suggestions

I started to take the passengers side head rest off - but I stopped when it became clear that the nuts inside would come loose - Have to strip it down and re-make it

I do have tonneau covers for it - with a centre zip so that I can drive and help streamline the passengers side - I should have done that

Taking the passengers side aero screen off is a bit of a fag - I may try just putting it flat

Not sure if I need a taller drivers side screen - it already boosts the air up above my head (I think)

The back has a tonneau cover on it already

I'm stuck looking after my wife at the moment - so don't know when the next event will be
 

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Tuft it and get someone to take pictures. Bet you have lots of backwards facing ones.
5280 is close to your motor rpm limits? Also means lots of back emf which limits output power. Slightly taller tires, perhaps?

Chin spoiler / splitter. Underbody covering. Ask the experts over at ecomodder about aero.
 

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Excellent suggestions

I started to take the passengers side head rest off - but I stopped when it became clear that the nuts inside would come loose - Have to strip it down and re-make it

I do have tonneau covers for it - with a centre zip so that I can drive and help streamline the passengers side - I should have done that

Taking the passengers side aero screen off is a bit of a fag - I may try just putting it flat

Not sure if I need a taller drivers side screen - it already boosts the air up above my head (I think)

The back has a tonneau cover on it already

I'm stuck looking after my wife at the moment - so don't know when the next event will be

Good news then, sounds like you are on the right track. I also concur with the taller tyres comment. That would put your motor back into it's torque band. Maybe try adding some string or tape hanging off the top of your screen, drive the car and see where the string is hitting your helmet. If it is hitting your chest or chin then it's not high enough. If it's hitting the top of your visor then all is well. I would be surprised if it were up to your chin.
 

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Discussion Starter #296
Major seems to think I would be OK at 6000 rpm - and I'm using 340v to keep the power at high revs
But I will look for taller tyres once these are worn out! - currently 225/45/17 and labeled "Recommended for competition use only"
Not until then! - these were expensive $300 each

I like the tape idea on the screen - definitely try that
 

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Discussion Starter #297
It looks as if I did do a little damage on my four full power runs

Yesterday my reversing contactor stuck! - I had reverse but no forwards until I poked the contactor with a screwdriver to release one of the contactors

The contacts look a bit second hand - I've given them a quick clean and they seem to be OK now
 

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Discussion Starter #299
Imho you've gone down the slippery slope of fried contactor contacts. Good luck.
Hi piotrsko - looks like you have put the evil eye on my contactor!

Still it came out of a small 24 volt forklift I scrapped 10 years ago so I suppose I need a new better one

Suggestions about where to get one?
 
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