floaty
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| posted on 5/1/13 at 06:40 AM |
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exciting
Hi ive just bought a built mk indy that seem to have a handling problem, i think the problem is that the car has to large tyre width and for this
reason at the slightest provocation will swap ends ! it currently has 205/40 17's on it so i think not enough weight is being transfered to the
road surface, what is the best wheel size and trye size and trye make to get the best from the car at the moment. cheers Floaty a new member
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fullpint
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| posted on 5/1/13 at 07:30 AM |
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Welcome along..
A few more details on the spec may help. Im guessing its not a BEC cause they are always tail happy and fun to drive 
Im not a big lover of big wheels.. Too heavy, rough ride and slow you down!! I like to have a nice high profile so the rubber can move around un-like
those low profile rubber-band tyres
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floaty
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| posted on 5/1/13 at 07:35 AM |
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what spec would you like as far as i know its running a 2ltr into with a rs carb, rear suspension is adjustable the dif is a standard sierra one not a
lsd and the tyres are cheap crap
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floaty
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| posted on 5/1/13 at 07:35 AM |
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quote:
Originally posted by floaty
what spec would you like as far as i know its running a 2ltr into with a rs carb, rear suspension is adjustable the dif is a standard sierra one not a
lsd and the tyres are cheap crap
Whats a BEC
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pmc_3
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| posted on 5/1/13 at 07:49 AM |
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BEC = Bike Engined Car
Cheap crap tyres are not going to help one bit, being rear wheel drive and with a decent power to weight ratio you will spin crap tyres too easily! A
decent set of tyres will help but I would consider going down to 15" wheels, it will give you a nicer ride and should improve handling.
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floaty
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| posted on 5/1/13 at 07:56 AM |
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quote:
Originally posted by pmc_3
BEC = Bike Engined Car
Cheap crap tyres are not going to help one bit, being rear wheel drive and with a decent power to weight ratio you will spin crap tyres too easily! A
decent set of tyres will help but I would consider going down to 15" wheels, it will give you a nicer ride and should improve handling.
I've got a lot to learn what size tyres and make would be good
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TimC
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| posted on 5/1/13 at 08:55 AM |
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Where in the world are you?
My advice would be to get a proper suspension check and setup done. Two personal recommendations:
In the South West - www.trackdevelopments.co.uk
In the Midlands - www.procomp.co.uk
Good luck with it.
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ReMan
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| posted on 5/1/13 at 09:26 AM |
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General consensus is biggest is best for looks and smallest is best for handling.
17's are about the biggest that ever get fitted 13's smallest.
Low profiles are also not going to help. 50 profile is faily normal.
Good quaility tyres are essential, to make the best of the light weight.
And you also need a much lower tyre pressure than a normal car, often 15-20 psi.
If the whole car is unknown then it would definatly be worth getting set up properly as well, it will all transform it.
Still even after all that, they still need treating with respect, to avoid provoking them going into ditches
www.plusnine.co.uk
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40inches
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| posted on 5/1/13 at 09:51 AM |
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Most probably old/cheap tyres and/or high tyre pressures, as said 15-20 psi for a car engine, 14-18 for a bike, makes a hell of a difference.
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designer
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| posted on 5/1/13 at 09:53 AM |
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Been said.
The tyres are too low a profile and too wide!
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Worzey
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| posted on 5/1/13 at 09:54 AM |
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First thing I did when I got my car was swap the 17" wheels for 15". I would have gone to 13" if they'd fit. I then swapped
the vented discs for single, wilwood calipers and Procomp shocks. A nice set of Toyo 195 R888's completed the mods followed by a full suspension
setup. It totally transformed the handling!
It's the unsprung weight that killed my car. Even a small bump in the road would try and throw me over a hedged before I had the work done.
Caterham R400
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austin man
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| posted on 5/1/13 at 10:34 AM |
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Agree get rid of the 17's fit a maximum of 15's with decent tyres. also have suspension and wheel alignment checked
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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Volvorsport
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| posted on 5/1/13 at 12:38 PM |
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springs fitted back to front ?
if theyre the same length its possible to get it wrong , i did , first corner @120 = massive oversteer moment.... that was on a track tho....
i swapped them round and it was brilliant!! , but 17s arent the best thing either
www.dbsmotorsport.co.uk
getting dirty under a bus
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ianclark1275
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| posted on 5/1/13 at 02:35 PM |
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my mini (600kg) tyre pressures are 28 front and 18 rear
good tires do make a difference.
measure twice, cut once, scrap it, start again.
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perksy
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| posted on 5/1/13 at 03:58 PM |
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It'll never handle that well with 17's on it to be honest 
Check the tyre pressures as suggested above but if you want it to handle really well you'll need to be looking at going for smaller diameter
wheels.
If you go for smaller wheels and decent tyres and then take it to somewhere like Procomp and you'll leave with a much better car that will be so
much nicer to drive 
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floaty
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| posted on 5/1/13 at 04:15 PM |
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quote:
Originally posted by perksy
It'll never handle that well with 17's on it to be honest
Check the tyre pressures as suggested above but if you want it to handle really well you'll need to be looking at going for smaller diameter
wheels.
If you go for smaller wheels and decent tyres and then take it to somewhere like Procomp and you'll leave with a much better car that will be so
much nicer to drive
Cheers thank you all very much
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Yellow Peril
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| posted on 22/4/13 at 07:37 AM |
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I also have 205 40 R17's on my MK Indy. Just got myself some 15's wheels and considering 195 55 r15 Tyres (for Front) and either the same
on the rear or 205 50 r15's if they will squeeze in and not fould the suspension. What do folks think of this idea ? Are 195/55's too tall
? Wheel alignment is currently very sorted with the 17's will this need adjusting when I put the 15's on ??
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Macbeast
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| posted on 22/4/13 at 08:49 AM |
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My last post on http://www.locostbuilders.co.uk/viewthread.php?tid=180361 might be relevant.
I'm addicted to brake fluid, but I can stop anytime.
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