DIY Stuffs, HandlingAugust 2, 2007 9:40 pm

 

28 October 2006

JIC Suspension-Project, the coilover I’ve been using it for daily driving and autocross. Last year my JIC leaks, the oil seal wear out…so i ask one of my Sifoo, EFN, from zerotohundred.com, regarding my problem. So we did a little DIY disassembling the JIC.We took one day for us to do it, we are newbie …but we manage to repair it…kudso to us.

A year passes a way, now my JIC leaks again, maybe the oil seal not good enough.

So the first thing I bought, is a new set of oil seal for the absorber cartridge from the oil seal shop, lucky I manage to get the desirable thickness .

oil seals details :
Left side : new set, RM10 each
- size = 20mmx42mmx7/7.5mm (better by the look)
Right side : last year set, RM3 each
- size = 20mmx42mmx10mm

both are from SOG.

The new oil seal can withstand the pressure from the coilover impact, wherelse the old doesn’t, that’s what the salesman told me. But by the look of the material, the set is much more stiffer and thicker.



see the 3mm differences…well the new set closely match the original JIC oil seal…


29th October 2006…
Now the coilover has been dismantle.
Check everything and found out that…


this little special oil seal from A1…at the bottom..
.

already torn out…no wonder there’s a free play and…"klakkk…klakk" sound…

The next day i went out to find the oil seal replacement , i went to suspension specialist, RS ONE for advise…to my disappointment…they don’t sell this special kind oil seal…plus they said…"if you all know how to repair it, sure i’ll close down my business…" heeee…

  Never mindsince that i needed my coilover before 4th November for autocross event, so i’ve to send it to them to repair it.
Danny from RS One asked me what’s the setting i wanted…Drag, autocross or track…so i said for autocross, a little bit soft then original, maybe 80% then stock…but he remind me that JIC spring are way too hard for soft shock absorber, so he told me that he will set it up the best he can. Soo…sent it on monday, the 30th Oct, got it by Thursday 2nd Nov.

Superb !!! The next day, put in every back in…setup alignment and chambering…then when out for a test…wow…my JIC is "alive" again…dampering was nice, no more irritating sound, better then what i’ve expected…worth it for RM400…Thanx Danny…

Almost forgot, the absorber valve…taken apart from bottom part of B1.

 

Handling 3:56 pm

Did a little bit of search here and there, read some reviews, copy paste a bit…heee…

Please do take note that this are about performance tire that mostly used on autocross, for normal daily driving only certain tire can be used, please do seek the links given to seek on review for your desire tire…

These review only can be taken as a basic guide, because tire review is very very subjective. Depends on the car setup, tire size, suspension setup, how the person drove the car, climate conditions and so on. The only to know it, is to experience it ourself.

so here is my little Humble Tire reviews notepad…emoticon

Bridgestone RE55S

- UTQG - Unknown
Reviews :
- Awesome grip and now popular with Japanese Gymkhana enthusiast. Good till end of life. I’d recommend it but its very soft and not suitable for road/street use.
Very very sticky for soft compound….!

-  POTENZA RE55S is the new commodity of the radial tire which shows high maneuverability at the time of motor sport having a match such as gymkhana and circuit travelling. As a radial tire for gymkhana competition circuit travelling of this corporation, this time, you adopted asymmetric directivity pattern for the first time, furthermore with the tire the left and the right you developed also the structure which becomes the framework of the tire respectively individually. Because of this the dry road surface actualizes the improvement of maneuverability from the first regarding the wet road surface.
In addition, as structure is optimized together in category and the temperature range and drive system etc of competition, the compound was renovated, TYPE WT TYPE TT TYPE the specifications of 4 types of SR TYPE TR were prepared. Especially, the new compound which combines the carbon of particulates diameter is adopted to TYPE TT, improvement of grip level and resistance abrasiveness is assured.

By the fact that you select the specifications which are suited for the needs of the customer from midst of the line-up of POTENZA RE55S, it is possible to assure more combat power improvement, at the time of various staging such as gymkhana competition and circuit travelling and time attack.

TYPE WT
- Gymkhana competition circuit travelling,
- Wet cryogenic

TYPE TT
- In gymkhana competition dry warm - for polar high temperature
- For circuit travelling time attack

TYPE SR
- All circuit travelling

TYPE TR
- For gymkhana competition FF car rear

- Source : Bridgestone

 

Bridgestone Potenza RE-01R

 

- UTQG - 140 A A
- Reviews : TireRack

- Rating :

Dry Wet Snow Handling Comfort Noise Treadwear Rating
4 3 0 3.6 3.3 3.3 3.3 3.4 
Rating Scale:   5 - Excellent    4 - Very Good    3 - Good    2 - Satisfactory    1 - Poor    0 - Not Applicable

source : 1010tires

Bridgestone G3

 

- UTQG - Unknown
- Reviews :
good road tires but noticed that the total width of tire thread for same equal size was smaller than the Neovas. Grips well.
- Rating : NIL

 

BF Goodrich G-Force T/A KDW-2

 

- UTQG: 300 AA A

Online survey : TireRack

- Rating :

Dry Wet Snow Handling Comfort Noise Treadwear Rating
4.8 4.2 0 4.5 4 3.5 3.7 4.1 
Rating Scale:   5 - Excellent    4 - Very Good    3 - Good    2 - Satisfactory    1 - Poor    0 - Not Applicable

source : 1010tires

BF Goodrich G Force Sport

 

- UTQG - 340 AA A
- Reviews:
Good and steady control in drifts . NICE for drifting and handbrakes

- Rating :

Dry Wet Snow Handling Comfort Noise Treadwear Rating
4.4 4.3 0 4.4 4 3.7 4.1 4.2 
Rating Scale:   5 - Excellent    4 - Very Good    3 - Good    2 - Satisfactory    1 - Poor    0 - Not Applicable

source : 1010tires

 

Goodyear Eagle F1

 

- UTQG - 220 AA A
- Reviews:
Good grip for the imported versions. I was quite impressed as I thought it was only good grip for wet. Handles well in dry too.

-Rating :

Dry Wet Snow Handling Comfort Noise Treadwear Rating
4.6 4.6 0 4.5 4.3 4.2 3.8 4.4 
Rating Scale:   5 - Excellent    4 - Very Good    3 - Good    2 - Satisfactory    1 - Poor    0 - Not Applicable

source : 1010tires

Yokohama ES100

 

- UTQG - 280 AA A
- Reviews:
Good street tires

- Spec sheet - Yokohama

- Rating :

Dry Wet Snow Handling Comfort Noise Treadwear Rating
4.7 4.1 0 4.5 3.8 3.4 3.2 3.9 
Rating Scale:   5 - Excellent    4 - Very Good    3 - Good    2 - Satisfactory    1 - Poor    0 - Not Applicable

source : 1010tires

 

Yokohama Advan Neova AD07

 

- UTQG - 180 AA A

- Spec Sheet - Yokohama

- Rating :

Dry Wet Snow Handling Comfort Noise Treadwear Rating
5 5 0 5 5 4 4 4.6 
Rating Scale:   5 - Excellent    4 - Very Good    3 - Good    2 - Satisfactory    1 - Poor    0 - Not Applicable

source :  1010tires

 

Yokohama Advan A048

 

- UTQG - 60 A A
- Reviews: NIL

- Spec Sheet - Yokohama

- Rating : NIL

 

Yokohama Parada Spec 2


- UTQG - 300 AA A
- Reviews: NIL

- Spec sheet - Yokohama

- Rating :

Dry Wet Snow Handling Comfort Noise Treadwear Rating
4.6 3.7 0 4.5 3.8 3.5 3.8
Rating Scale:   5 - Excellent    4 - Very Good    3 - Good    2 - Satisfactory    1 - Poor    0 - Not Applicable

source : 1010tires

 

Falken RT215

 

- UTQG - 200 A A
- Reviews:
For autocross..not so impressive. I think its better for track use. Loses grip as the tyre threads wear too.

- Rating : NIL

 

Falken RT615

 

- UTQG - 200 A A
- Reviews: NIL

- Spec Sheet - Falken 

- Rating :

Dry Wet Snow Handling Comfort Noise Treadwear Rating
4.7 3.3 0 4.6 4.3 3.8 3.6 4.1 
Rating Scale:   5 - Excellent    4 - Very Good    3 - Good    2 - Satisfactory    1 - Poor    0 - Not Applicable

source : 1010tires

 

Silverstone EvoL 8 FTZ Sport

 

- UTQG - 280 A A
- Reviews: NIL

- Rating : NIL


P/S : Will keep on updating, if I got more info…

 

Handling 3:50 pm

Jagajang…!!!

See what happened…

 

Ball joint torn out, sway bar link too soft, sway bar bushing got some unwanted movement and crumpel…

at first I was about to do the front set only…but keep thinking by doing so, it won’t feel that much different plus i have to do alignment and cambering all over again…so it’s better change the whole part together…at the cost of RM700…hmmmm…

after installation…run a few round the make sure the parts have properly "run-in"…the results…
better stereng response, more comfortable ride, beter handling and cornering…superb…!!!

that’s why Club4ag quoted

replacing all the suspension bushings are the best investment for proper handling

 

 

aaahhhh…i just wish this kind of setup are on my ride right know emoticon

total control on conering…better handling… 

 


 

Handling 3:16 pm

UPDATED - 18th Feb 2008 (after 1 year using it, on normal driving, autocross and so on) 

At first I was looking for Yokohama A520 which currently used on my rear tire, so I need a new pair for my front wheels…but since the Yoko’s A520 has stop production (for Malaysia’s market), the "taukeh" introduce me Yokohama Parada Spec 2 that will replaced A520…at first glance…WOWWW !!!…superb looking, well looks doesn’t means it’s good…so I called my friend to check on the Internet on reviews of this tire…so here what he found out…UTQG is better, it’s under Ultra High Performance class in Yoko’s page, price almost the same with A520 and reviews show it’s worth money to buy…

Uniform Tire Quality Grading (UTQG) :

A520 : Treadwear 180 Traction A Temperature A (side wall OK)
Parada Spec II : Treadwear 300 Traction AA Temperature A (side wall less stiffer)

So, because of the price is the almost the same, plus Treadwear and Traction better (because it’s a new tyre so they put AA grade first…but for me after using it for a year…i would give B for i :D )

My rating…out of 5…1 - Worst , 5 - Best

Handling 3, Comfort 4, Noise 4…
very worthy to buy…let it run a few hundred KM to throw a way the production "oily cover" on the tire…

later went back to check on the net on more details of the tire review…the tire is NOT unidirectional, asymmetrical… "side facing outwards"…

the only problem is the pattern grooves…it’s a little bit weird…pattern the same…but they doesn’t have the term "left side" or "right side"…take a look at it…

Full view: 

 

 

Closer view : (left side : right side)

 

During hard cornering although it do grip well…but still sometimes these tyre tend to "screem"…sidewall too soft…not so good.. i would prefer the old A520 and surely ES100 would be better…

Here are some links about the tire :

Yokohama page

TireRack reviews

Car Forum reviews

Parada Spec 2 Technical spec 

 

Some picture of the tire after hard cornering…

Under pressure : 28 - 29 psi

see the marking on the sidewall…huuu…so horrified…maybe the road debris make the marking on the sidewall… 

 

 

just the right pressure for daily driving : 31 - 32 psi