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New Semis

Leif

By Leif,
in Motorsport Discussion & Builds

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Leif Enthusiast

Leif

Posted
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Hi All,

I splashed out on a new set of semis for my S13 recently, and I just wanted to check what's important when you first take them out.

I've driven on used semis before, but this is the first time on a brand new set.

My guess is you need to take it pretty easy for the first session to allow the smooth layer a bit of time to wear away. Is this what people mean when they talk about scrubbing the tyres in?

Do you need to do lots of moving around, or will taking the normal line suffice?

(Normal circuit sprint event, not a hillclimb or anything).

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evil_weevil Grand Master

evil_weevil

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Leif,

I have just got on out and tried to scrub them in before I got there.

I had brand new r888's a few months back - put them on the car the weekend before and drove on the roads around my area trying to get a bit of wear in them straight up.

seemed to work!

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Marlin Grand Master

Marlin

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I've found this link quite good....... I know there's a lot of very very basic stuff there but I followed the suggestions to running in new tyres and found I got over 1000 competetive kays out of my last set of Dunlop O3G's.

See "Heat Cycling of Competition Tyres"

http://www.fsport.com.au/fsport_siteroot/tyretech.html

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Leif Enthusiast

Leif

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Thanks Guys, very helpful.

That heat cycling procedure at the link sounds good, but I think i might annoy a few people if i spend my first session driving at half pace for 4-5 laps! :D

Maybe if I do as Chris suggested before hand then spend the first session on the day gradually increasing load?

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Russman Grand Master

Russman

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That heat cycling procedure at the link sounds good, but I think i might annoy a few people if i spend my first session driving at half pace for 4-5 laps! :D

First sessions at track days normally are not timed so it's a good chance to do it then.

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evil_weevil Grand Master

evil_weevil

Posted
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First sessions at track days normally are not timed so it's a good chance to do it then.

Ours are.

You generally get 1 lap warm up from pits, but as soon as you get to last corner and cross the line timing starts.

However with EC supersprints, you get 1/4 lap warm up as track is toooooooo long LOL

Wish I could make it Leif, but I'll be drunk on my bucks weekend LOL

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siksII Grand Master

siksII

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Well I was happy with about 3/4 pace, and hey, that makes us quicker than most on track anyway huh :)

Basically don't get them too hot, and let them cool without weight on them.

What advantages does letting them cool without weight on them give?

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S13Deviat Grand Master

S13Deviat

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Just go hard Leif!!!! Drive it like a man possesed and show those SSCC peeps that the blue rocket still lives, albeit someone diff behind the wheel! :)

If you want some tips on EC in the blue rocket just let me know....... one quick one is... Turn 1 can be taken with no brakes, just feather off and do a late apex...... but perhaps first time out, just give the brakes a quick dab :)

Good luck champ! Just be safe and have fun! Would come out and see you fly but i am out getting drunk with Chubbs :)

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Duncan Grand Master

Duncan

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don't worry, you won't get 100% laps in on green tyres. the first 2 laps are rubbish, they must have some coating on them.

the best results I have heard of from new tyres is:

1 warm up lap

3 super quick laps (they are at their best now)

put up with the result for the next 3-5 meets

or if you want them to last:

1 warm up session (70%)

leave them under the house for a month (cool, dark)

enjoy the 10% better performance for 3-5 meets.

yes you may have constraints that don't let you take option 2 like all timed sessions, or no spare rims....so many people choose option 1

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Leif Enthusiast

Leif

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Thanks again for the info guys... I think that the driver will be the limiting factor here, not the tyres, so not the end of the world if they don't get the perfect breaking in procedure. At least I know what I should be doing :blink: .

Ando: Mate, I am chomping at the bit to get out there. Autosalon car represent!

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Duncan Grand Master

Duncan

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Ha dont let the SSCC guys give you grief about that sexy cars of yours! They are just scared of it!!!!!! :happy::) Go give some competition to Greg and his cheater silvia :cool:

pfft that car is a pushover, a stock gtr beat it at the last race meet at oran park according to natsoft

696 Greg Boyle Autosport Silvia 2600 JAP 6 1:19.5520

132 Duncan Handley (NSW) Medalist Tools/Hills Motorspor Nissan Skyline R32 2568 JAP 6 1:19.4568*

*=fastest lap time

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