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Post by justchris on Dec 27, 2010 17:49:20 GMT
Hi what temps do you warm tyres to. Do you go to there temp e.g. 28's= 28c 32=32c etc. Hope that makes sense. Also whats the difference between tyre warmers and a tyre cooker. Thanks.
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Post by mattsedgley on Dec 27, 2010 19:41:36 GMT
tyre cooker does tyres that are off the car only..
tyre warmers can warm them whilst they're on or off the car..
most people heat to around 50degC although this can change depending on conditions on the day.. I would heat 32's quite high on a cold winters day, where as 28's i would heat a a bit less, as I don't want them to be over temperature when they get to the track..
the compound of the tyre is a good represenation of what heat the tyre likes to be at roughly.
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Post by justchris on Dec 27, 2010 19:48:05 GMT
Nice one mate,one last thing tyre additive is this necessary with heated tyres ?
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Post by darrenoakley on Dec 27, 2010 22:16:36 GMT
A lot of racers cook the additive on with the warmers outside. Also I run warmers indoors as well as outside as I find they really help, rear hotter than the front. Some say it's doesn't work but it does for me. Muchmore are very good in my opinion mate.
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Post by yellowshark on Dec 28, 2010 9:18:51 GMT
Nice one mate,one last thing tyre additive is this necessary with heated tyres ? Interesting question Chris. Something I have struggled with forever; in theory maybe no, but... Tyres have an optimum operating temperature. EG Sorex 28s run 20deg to 29 deg and 32s run 28 deg to 35 deg. Take-off tyres have a much wider quoted operating range. So in theory you match the tyre to the temp - measure that with a laser gun as soon as you can get to the car after a run! That is of course assuming you can afford a range of tyres to match the “ambient” temperature Obviously your tyres will be cooler before you start than they will be after a few laps when the energy going through them will have warmed them up. So at the start you suffer two things. Firstly your tyres will not be at optimum temperature, reducing grip. Secondly you will be going through a heat cycle which increases wear. I warm our 32s to 40deg in the warmers – allowing for some temperature drop prior to the start. And as Matt said, on a cold winter’s day I warm them to closer to 50degs. Whether or not that is actually a good idea I am not sure but it just feels a smart thing to do. Which brings me to my “but” and an area where my understanding is minimal. Additive softens the tyre, in theory providing more grip. But if your tyres are operating within the optimum temp range of the tyre, I am not sure whether the additive adds anything, is neutral or indeed has a negative effect. I have this nagging thought that if the tyre is operating at optimum temp. Then making them softer is not a good thing and quite possibly unnecessarily increases wear. I also assume that if the temps are such that you cannot reach the optimum temp then using additive might help you achieve this and thus would be the right thing to do in addition to warming up the tyres. Ie the softer the tyre, the more movement there will be, the more energy used, the higher the heat; but that is all guesswork.
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Post by Reuben on Dec 28, 2010 12:18:04 GMT
What works for me is:
Addative and 40-50 degres outside for 20-25 minutes. If its a hot day ill not bother with Addative as I find it makes the tyres become greasy (addative becomes very watery). However with no addative you do loose a few tenths at the first few laps - but can gain them back later on when others tyres are starting to overheat. However as its still FREEEZING outside, I would run Addative and 50 degrees heat every run.
Indoors - Addative is a MUST, heat is optional - I prefer no heat, as it makes the car more predictable for the whole run.
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Post by Reuben on Dec 28, 2010 12:19:18 GMT
oh and make sure you tyres are dry to the touch before you go on the track and not soaking still - because thats like driving on ice.
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Post by justchris on Dec 28, 2010 17:39:08 GMT
Thanks lads Interesting advice about tyre additive and the pros and cons.
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