ג'ימקאנה ביום שלישי ה-18 לינואר!!!!

[ramigt]

כמה אתה צריך? 20 ליטר... ל 15 דקות נסיעה?

 

האם המסלול יתפרסם לפני הג'מייקנה?

אני גם רוצה לעשות קווים

[Discover]

החיה שלו טורפת דלק..

והשאלה היא לא כמה דקות נסיעה - אלה על כמה סל"ד

[bmw700]

אבל למה ביום שלישי?????????

 

אני יהיה בבסיס בקורס אז אני לא יוכל להגיע

[lior_baruch]

החיה שלו טורפת דלק..

והשאלה היא לא כמה דקות נסיעה - אלה על כמה סל"ד

אני מניח שזאת תהיה בשבילי ג'מקאנה של הילוך ראשון..מהסיבה הפשוטה שלפעמים בעיר אני בכלל לא מעביר לשני... הראשון שלי מגרד את ה80-90 קמ"ש, בלי "לקרוע" את המנוע...

 

בטווח סל"ד של נסיעה בג'מקאנה הצריכה תהיה...1:2, במקרה הטוב .....אבל מי סופר

 

צריחת דלק נעימה לכולם,

 

ליאור

[liran1]

שאלה חשובה:

 

מה יהיה במקרה של גשם ? האירוע יתקיים בכל מקרה ? אם יהיה צפוי גשם שלושה ימים לפני- תתפרסם כאן הודעה על דחייה ?

[Moti - Miata R]

אם כבר מיאטה...מוטי משתתף ?

!Yep! I'll have to get out of work early but I'll be there

 

 

 

 

 

Lior is not going to have an easy life putting the power down... especially not after I saw what kind of tires he's running... Lior...

... spend some money on your next set, will ya? there are much stickier tires to be purchased... all the power in the world won't help you if you can't put it down

 

 

.I don't think the seperation has to be by driveline... I'd recommend by a combination or treadwear and HP/weight ratio if anything

 

 

Gershon, I wouldn't be so sure about the "edge" that hot hatches have over RWD cars as you put it.. a well driver bimmer can definitely surprise you unless your track is ultra tight and ultra slow

 

 

!Anyways, you guys have fun

 

 

?Do you guys know how to set the correct tire pressure for gymkhana

 

 

.Moti

שאלה חשובה:

 

 

 

מה יהיה במקרה של גשם ? האירוע יתקיים בכל מקרה ? אם יהיה צפוי גשם שלושה ימים לפני- תתפרסם כאן הודעה על דחייה ?

I say there shouldn't be! rain is what seperates from good drivers and guys that just hold the wheel... you need to be a good driver to drive fast when it's wet

 

 

!FUN

 

 

.Moti

[ttzz]

אבל למה ביום שלישי?????????

 

אני יהיה בבסיס בקורס אז אני לא יוכל להגיע

זה יום ריק יחסית התמחם

[Moti - Miata R]

Here's the way to set it up correctly, good for all you guys that are going to do it for the first time or even for all you old timers that don't really give it athought... tire pressure can make a nice improvement on your car's handling

 

 

I'd normally start by pumping the tires to about 7-8 psi more than the normal pressure BEFORE I get to the gymkhana area, this is especially good if you don't have a compressor with you to fill them up on site

 

As I get to the location, I'll go through the tires and check the tire pressures in all tires before my first run, set it to about 4 or 5 psi more than the normal recommended pressure consistently between all the tires, and them mark all of them with white shoe polish as the explanation says, this is a quote from another thread

 

- Quote begins

 

There's a way to find your optimal tire pressure for performance purposes which is fairly simple and only requires you to have white shoe polish and an accurate tire gauge

 

- How to set tire pressure for better handling

 

The idea is to use the maximum width of the contact patch WITHOUT rolling on the sidewall, this will give you the optimal performance from the tires

 

.You'll want to do this test in a deserted parking lot or something in that nature, just in order to be able to turn the car to different directions

 

First off, you need your tires to be filled up ~4-5 psi higher than the , manufacturer's recommendation, next - mark the tires with white shoe polish from the sidewall to the contact patch as shown in the picture, mark 3-4 times with even gap between them

 

.In order to be consistent, let's say that all tires will be set in the exact X psi higher than the manufacturer recommendation

 

Now, get in your car and drive it in low to moderate speed turning to both directions, 8 figures will do just fine too, but try to cut the corners fairly smooth and not cranking the wheel... after you've driven the car for about 60 seconds and turned it to both directions about the same amount of times, stop the car and measure the tire pressures immediately, now look at the shoe polish marks - do they get exactly to the edge of the contact patch? are they not getting exactly to the edge? are they rolling over the edge? here's what it means

 

Marks that are worn down into the sidewall mean that the pressure isn't high enough, marks that are not worn all the way to the edge of the contact patch mean that that pressure is too high and marks that are worn down exactly to the edge mean that you just found the optimal pressure of your tires

 

Repeat the experiment according to the results you've got - lowering or raising the pressures as need and don't forget to mark the tires again, all while keeping close notice of the tire pressures changes, most chances that you'll find out that the best tire pressure for handling will be 3-5 psi higher than the manufacturer's recommendation, and keep in mind that hot tire pressures are a bit higher, so keep in mind that the cold pressures will need to be a tick lower

 

.Quote ends

 

This obviously discusses the settings as an experiment, what I will do, as well as just about any person that cares about the consistent performance of his car between the different runs, is to set the correct tire pressure again before EACH RUN according to the results that you got from the previous run, keeping in mind that it might require completely different pressure in each tire

 

- For example

 

Let's say you tested your car, and instead of the manufacturer's recommendation for 31psi all around in your tires you found out that it's better balanced when the pressures are 34psi in the front and 32psi in the back, now you start your runs in the gymkhana with those pressures in your tires, but out of 20 corners 14 are to the right, meaning that right after your runs you might find out that the pressures have changed to 37psi in the LEFT front tire, 35.5psi in the RIGHT front tire, 34.5psi in the LEFT REAR tire and 33psi in the RIGHT REAR tire

It's easy to see that the left side tires carry most of the load in this example, and for the next run I'll set the tire pressures again, this time filling up the left side tires a bit less to have them going back to their optimal pressure for longer period of time during the run, something like 33psi in the Left front, 34psi in the right front, 31psi in the LEFT rear and 32psi in the right rear

 

This may sound like a little too much but in reality setting the tire pressures takes only a few seconds, it is espacially easy if you have a tire pressure gauge with a built in bleeder valve as most of the good ones do have it

 

Diagrams attached for easier visualization, hope you'll find it helpful

 

 

 

.Moti

[Mad Max]

Diagrams attached for easier visualization, hope you'll find it helpful .Moti

THANK YOU

[שובבון]

אם אני סתם אנפח את הצמיגים ב3-4 PSI יותר זה גם יעזור, נכון?

[גרשון המשפר]

תודה על ההסבר !

 

אני מנצל את הת'רד בכדי לשאול, איפה ניתן לקנות מד-לחץ אויר איכותי ?

אני מחפש כזה כבר כמה זמן, ועל השעון הזול של אוטו-דיפו אני לא בטוח שאפשר לסמוך !

יש הצעות ?

 

(יש לי שעון מקצועי ומדוייק מאוד, אבל הסקאלה שלו נגמרת ב-200 PSI, ככה שהעבודה איתו לא כ"כ נוחה...)

[Tar]

אני חושב שאם הייתם עושים את זה ביום שישי היו באים יותר אנשים

אבל זה החלטה שלכם

בכל זאת אני כנראה יבוא

עוד עוד חבר או שניים

[Pentos]

א. מקווה שהמסלול מואר הייטב!

ב. חבל שרק 40 משתתפים, אבל נו טוב, זה גם משהו

 

משתתף!

[cgc]

חברה אני רואה שאנ יבין אלו שלא באים בכלל!

תשנו בבקשה את הששתתפותי - אני בא לצפות!!!

[Moti - Miata R]

תודה על ההסבר !

 

אני מנצל את הת'רד בכדי לשאול, איפה ניתן לקנות מד-לחץ אויר איכותי ?

אני מחפש כזה כבר כמה זמן, ועל השעון הזול של אוטו-דיפו אני לא בטוח שאפשר לסמוך !

יש הצעות ?

If you can't get any in israel from some kind of reason, there's always the possibility of ordering online from the normal race parts suppliers that everyone here in the US including myself buy from, here are a few links

 

http://www.racerpartswholesale.com

www.longacreracing.com

www.hrpworld.com

www.pegasusautoracing.com

 

.I bought stuff from all four already and they have excellent service and packaging

 

.Moti