|
|
|
Plan is to have sticky A048/toyo 888 rubber at rear, normal road tyres like Pirreli/contis up front. Why? Traction is an issue on my RWD datsun. It has LSD, but struggle with grip on full boost. ;D The idea being that the softer rubber ensures grip @ rear whislt road tyres don't destroy the driving feel up front...with sticky A048 or toyo 888 at front, the car tramlines and follows the road contours- parking is also a pain. So is such a combo recomended? One tyre supplier suggested NO
|
|
|
|
|
|
|
|
Can't you get a second set of rims and have one set of each? That would be by far the ideal solution. I suspect that the reason it's not recommended is because of what happens at the limit. If you push your car hard enough to reach the limits of traction (and let's be honest, if you're planning on buying semi-slicks then you will) then the front tyres will reach the limit of grip long before the rears and the car will understeer significantly. Not to mention that the rear tyres will heat up and start to stick if you go for a bit of a thrash, making the understeer worse. I'm not an expert though so go with whatever you think is best.
|
|
|
|
stealthstylz
Club Retro Rides Member
Posts: 14,926
Club RR Member Number: 174
|
|
|
Can't see it being a problem myself, just have to go steady when its raining (but then you probably have to anyway)
Matt
|
|
|
|
|
|
May 11, 2010 10:27:59 GMT
|
What tires are you currently running?
If you want decent sticky rubber then you will suffer from tramlining etc. Even performance road tires like Eagle F1 / Yoko Parada2 / Bridgestone RE01 will tug and pull all over the shop.
Having vastly differing levels of grip front and back will just give you more handling issues and imbalance the car in the corners - you will find that the extra grip on the rear will cause the front to push wide in bends, the rears will give you the grip in the bends that the fronts wont be able to match and the grip difference between somthing like a R888 and a road tire is huge!
|
|
|
|
|
|
May 11, 2010 11:07:31 GMT
|
I would go for 888s all round. Options for changing the grip factor include changing the tyre pressures, making suspension adjustments and running different widths, eg 225 rear and 205 front.
Also your 888/pirelli suggestion means that on track they will heat up at different rates and provide you with varying grip levels - mildly hot will be dynamically different to full hot.
What suspension do you run? Coilovers? Have you tried messing with the bump/rebound adjustment?
Charlie
|
|
Last Edit: May 11, 2010 11:10:59 GMT by charlie
|
|
berendd
Europe
why do I need 3 keys for one car?
Posts: 1,449
|
|
May 11, 2010 11:15:27 GMT
|
I won't suggest such a setup..
have you tried some different widths???
195-185 or maybe even 175 up front?
|
|
|
|
v8ian
Posted a lot
Posts: 3,824
|
|
May 11, 2010 12:38:40 GMT
|
I run normal Road Yokos on the front and 888s on the back, Never had a problem with this set up----yet, but, I don't trackday the car as such, but I do drag race it a lot,
|
|
Atmo V8 Power . No slicks , No gas + No bits missing . Doing it in style. Austin A35van, very different------- but still doing it in style, going to be a funmoble
|
|
|
|
May 11, 2010 12:48:04 GMT
|
My present set up is
185/55/14 all round, tyres are yoko A539 with even wear and 5+mm thread. Car has adjustable coilovers, camber, caster etc and decent springs and LSD etc
I don't want to go for bigger rims ( 15" plus) as tyre selection is heaps better in 15". I can not get any performance tyres wider than 195 on a 14" ( excluding trackday tyres etc). No one does 205' profile performance (non trackday tyres)
So Peformance road going tyres -only option is Toyo T1-R in 195/55/14, which are £60 a corner (ouch)
The car is not used for trackdays at all...just fast road bursts etc. The primary reason for trackday rubber @ rears like toyo 888 etc is that they stick like sh.., hence traction will be not an issue. Up front, with 888;s or O48's, I compromise the ease of driving especially when cruising along at 40mph etc etc
I take on board comments regarding the differences on heat built up, and when wet. TBH, when its wet, its strictly off boost ;D
|
|
|
|
|
|
May 11, 2010 13:27:48 GMT
|
From what I have heard the price of R888's they have gone up alot in the last few months - and when I looked at a set last year they were still very dear in comparison to a good performance road tire. So if you think £60 hurts your going to be in for a surprise.
Based on that you will potentially pay the same for 1 R888 as you would for a pair of decent performance road tires!
R888's will wear out alot quicker than road tires as well.
Look at the Yoko Parada 2 - I run these on mine and they come it at £40 a tire, and I am very impressed with the level of grip they offer for a road tyre. I only track my car but cant / don't want to spend out on a set of R888's just yet.
Not surprised your having issues with traction - A539's are dire, even my wheezy old 8v golf could get those spinning in damp conditions.
|
|
Last Edit: May 11, 2010 13:29:35 GMT by eightsix
|
|
|
|
May 11, 2010 13:31:23 GMT
|
I've just bought a set of toyo T1-Rs for my 106, 195/45/14 front and 225/40/14 rear. Lower profile than what you are running, but they will give you an extra bit of width at the back.
It was £208 delivered for the set, which I though was pretty reasonable considering!
|
|
|
|
|
|
|
May 11, 2010 16:16:46 GMT
|
I've just bought a set of toyo T1-Rs for my 106, 195/45/14 front and 225/40/14 rear. Lower profile than what you are running, but they will give you an extra bit of width at the back. It was £208 delivered for the set, which I though was pretty reasonable considering! Did you get these from mytyre.com? 225/40's...with that size yes I get the width but the profile is too low for me. Besides 225's on a 7J wheel is not right, need 8J or wider , which means more cash! Have you got a piccy of the 225/40/14? Eightysix- Pradas are not available in 14"...well last time I checked anyway ! YOu may be right on a A539's though. Lots of mixed comments on them. Some of the old skool mini and ford lot love them and yet others don't find them a competent tyre for big bhp/tonne applications
|
|
|
|
|
|
May 11, 2010 16:24:45 GMT
|
They came from Camskill.co.uk, and arrived 18 hours after ordering. All I have is this photo: Not a great photo admittedly! that is on an 8.75" rim. They are identical in rolling radius to the 195/45/14s (and hence the same sidewall height)
|
|
|
|
|
|
May 11, 2010 16:36:15 GMT
|
|
|
|
|
|
|
May 11, 2010 16:39:43 GMT
|
That looks lovely. 8.75" means 8J on a 106 ;D...more photos please... I might settle for T1-r's 195/55/14 or 195/45/14. prefer the 55 series as sidewall is needed on retroish car...IMHO Shame they don't do 205/50/14 on T1R's, only T888's !
|
|
|
|
|
|
May 11, 2010 16:43:18 GMT
|
Al, I don't mind paying more for the right size. FACT is that there are no good choices in 14", unless you opt for trackday tyres, which come with their own issues Changing to 15" wheels with zero or -ve offset means another £500. Add £300 for tyres and its £800 to a budget that is in deficit to start with. ;D Besides I like the 14" look
|
|
|
|
|
|
May 11, 2010 17:30:00 GMT
|
i used to run and will be running M/T street ET radials rear 275/40/17 and normal street tires in the front (215/40/17 yoko pradas in this case ) with no probs at all . the setup is a pro touring type setup closer to pro street than track day but holds the same principle as it is set up for handling rather than out and out straight line grip
|
|
|
|
CIH
Posted a lot
Posts: 1,466
|
|
May 11, 2010 19:31:47 GMT
|
Possibile problem is the different sideall properties of the two types of tyre. 888s have exceptionally stiff sidewalls.
|
|
|
|
|
|
May 11, 2010 19:51:19 GMT
|
Possibile problem is the different sideall properties of the two types of tyre. 888s have exceptionally stiff sidewalls. Unfortunately not true. The R888s have far to compliant sidewalls to cope with the sticky compound, which means they always play 2nd fiddle to Yoko A048Rs. Now that they're similar prices the Yokos make way more sense....
|
|
1997 TVR Chimaera 2009 Westfield Megabusa
|
|
CIH
Posted a lot
Posts: 1,466
|
|
May 11, 2010 21:19:58 GMT
|
True. I handle 888s every day.
|
|
|
|
|
|
May 11, 2010 23:59:20 GMT
|
True. I handle 888s every day. Maybe, but they are fair way off off the A048Rs (size for size). The guy I bought one set of my 48Rs off had all three in his garage, the T1Rs for the road and 48Rs for the track. The R888s had seen one trackday and been removed due to the softer sidewalls allowing the tread to roll over and overheating the outside of the tyre (showing as a blue discolouration). It's a common complaint on lightweight cars using high profile R888s on low pressures. Yes they may be stiffer than an ordinary road tyre, but compared to the majority of 'R' rated tyres they are pretty compliant, which comes down to the fact that they're a road tyre with beefier sidewalls and mega sticky rubber as opposed to a race tyre with enough tread to get an e-mark. You may disagree with this, but it's the opinion of a lot of the trackday crowd who were tempted by the R888s low price and are now reverting as the price margin is reducing. They are stiffer than a standard road tyre, but not what many would consider exceptionally stiff for an 'R' rated tyre.
|
|
1997 TVR Chimaera 2009 Westfield Megabusa
|
|
|