Proby
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| posted on 10/9/11 at 03:29 PM |
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F27 Blade very arse end happy???
Hi all,
My F27 blade seems very arse end happy compared to my old Megablade. I've let the tyre pressures down to 20psi as I know they were running a bit
high, but it's just as bad on the oversteer. Are all live axle cars like this? My Megablade was IRS. I also think the tyres maybe a bit hard and
need a softer compound? They are some cheap 195/50 15 that were on when I bought it. Nearly caught me out a few times today!
Chris
[Edited on 10/9/11 by Proby]
[Edited on 10/9/11 by Proby]
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NigeEss
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| posted on 10/9/11 at 04:33 PM |
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20psi is still a bit on the high side, 16-17 I believe is the norm.
If you have cheapo tyres as well you on a non starter. I had an MR2 mk1 with new cheapies
on the back and it was dreadful.. I put Yokies on it and transformed it, it took a fair amount
of provocation the get the tail out.
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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mark chandler
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| posted on 10/9/11 at 04:40 PM |
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Cheap tyres destroy handling IMHO, especially with a light car as they tyres will be designed to carry a lot more weight.
Most expensive tyres these days are weight matched to cars, jaguars have a little J on them, Mercedes M next to the tyre size cast on the casing.
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andyfiggy2002
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| posted on 11/9/11 at 12:14 AM |
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i agree, since changing from 195x15x50 yoko A539 road tyres to 185x13x60 A048/ R888,s track/road legal tyres i've noticed a difference on my
megablade, however beware in the wet!!! 17 psi is what i use
[Edited on 11/9/11 by andyfiggy2002]
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Proby
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| posted on 11/9/11 at 12:54 PM |
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That's what I run I my old megablade, even with road use I found I had to 'warm them up' before pushing on a bit. I'm going to
change the tyres over winter, might even change to 13" rims!
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andyfiggy2002
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| posted on 12/9/11 at 10:40 AM |
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R888/ A048 come in softer compounds for better grip & even tho the 15" with 50 profiles have the same rolling circumference the 13"
with 60 profile tyres are cheaper, you have a softer ride & the sidewalls will warm up better, if you notice on F1 cars they don't use low
profile tyres for this very reason
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britishtrident
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| posted on 12/9/11 at 11:20 AM |
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20psi is still too high try 15psi front 17psi rear cheap tyres have poor girp on damp roads. Also make sure you haven't got the
dampers set to hard as this can make the handling very skittish, with a light car you would generally wa the dampers set very soft.
nt
More generally with all other things being equal if the car oversteers it means the rear is providing to much of the cars roll stiffness relative
to the front, ie either soften the rear springs or stiffen the front by harder springs or fit a front anti-roll bar..
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iank
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| posted on 12/9/11 at 06:19 PM |
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Given where you are the best way to get it set up right quickly is to take it to procomp.
http://www.procomp.co.uk/
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Proby
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| posted on 12/9/11 at 07:56 PM |
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Thanks very much for all the replies. It is very 'skittish' on the road too, I think first I'll let the tyre pressures down a little
more to the recommendations given here, then I will try winding the rear dampers down a few clicks at a time. I'll report back soon!
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Proby
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| posted on 15/9/11 at 06:45 AM |
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Well, I went out with a biker mate for a blast last tonight, I had let the fronts down to 15psi and rears on 17psi and it seemed much much better.
Hopefully I'll have a play with damper settings I've the weekend, but now also got to look at rev counter and all instrument backlights!
I'm hoping it's a dodgy earth and the rev counter ain't knackered!
[Edited on 15/9/11 by Proby]
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