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Old 07-06-2004, 11:14 PM   #61
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Default Re: Re: Re: Re: Re: Re: Track Width

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Originally posted by InitialD
Bro, with so many hours on the 710 fiddling with the Centax clutch and you have problems on the 950 Centax?

Measuring the distance between centax nut to the end of the thread is more consistant and does not depend on how many shims you have between the flywheel and the engine front bearing.
Ha ha... I just want to make comparison and make sure.
Since I was the only one drove 950R and did not have enough time to dial the clutch perfectly.
Okey, here is what experienced during the race:
Using KHM (boy... ) start with 1.2mm there is slight delay but mid to high just perfect.
Then I add some turn in, nothings change, I add again untill ended up with 1.6mm!! perfect bottom launch.
But there is some other small problem, shifting point is varies too much.
Any ideas/input are welcome, thank you
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Old 07-06-2004, 11:56 PM   #62
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Default Re: Re: Re: Re: Re: Re: Re: Track Width

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Originally posted by GoldFinger
But there is some other small problem, shifting point is varies too much.
What do you mean? High rev before the initial clutch engagement kicks in or engagement of 2nd speed?
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Old 07-07-2004, 12:20 AM   #63
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Default Re: Re: Re: Re: Re: Re: Re: Re: Track Width

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Originally posted by InitialD
What do you mean? High rev before the initial clutch engagement kicks in or engagement of 2nd speed?
Sorry bro.. I mean when clutch is dialed with 1.6mm the 2 speed shifting point is vary so much.
Around 10-15 meter diference, I dont like it. Since it happen right before back straight after (full throttle)sweeper.
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Old 07-07-2004, 01:03 AM   #64
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Default Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by GoldFinger
Mr. Chan,
What engine you are using?
Do you ever measure distance between centax nut too thread end?
Last time, Im bit struggle with this.
Thanks.
I'm using JP with Mugen Superhard Clutch Spring(1.9 mm diameter) .

~ 1 mm . I think but If i have to tighten too much to get bottom end, I will change to use harder spring such as Mugen SuperHard, SMP Clutch Spring..

But If you use the clutch shoe with round spring in the center, I think u might not need to tighten so much ...


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Old 07-07-2004, 01:13 AM   #65
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Default Re: Re: Re: Re: Re: Re: Track Width

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Originally posted by MrChan
But If you use the clutch shoe with round spring in the center, I think u might not need to tighten so much ...
You mean the old type flyweight used in Centax 1? I thought that was already obselete as the performance from that one is less than the one like in Centax 2/3.
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Old 07-07-2004, 01:29 AM   #66
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Default Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by InitialD
You mean the old type flyweight used in Centax 1? I thought that was already obselete as the performance from that one is less than the one like in Centax 2/3.
I used this one before but I did not put the spring .... I'm now using the SMP .....look similar but no spring in the center ..
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Old 07-07-2004, 01:30 AM   #67
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Default Re: Re: Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by GoldFinger
Sorry bro.. I mean when clutch is dialed with 1.6mm the 2 speed shifting point is vary so much.
Around 10-15 meter diference, I dont like it. Since it happen right before back straight after (full throttle)sweeper.
what is you tire size ? tire size will make a difference too !
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Old 07-07-2004, 02:00 AM   #68
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Default Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Track Width

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Originally posted by MrChan
what is you tire size ? tire size will make a difference too !
Start with, 72.5 / 66 mm
Yah.. make sense, i notice that after 30-35 minutes mark.

I have to admit that you were very good on this.
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Old 07-07-2004, 02:28 AM   #69
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Default Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by GoldFinger
Start with, 72.5 / 66 mm
Yah.. make sense, i notice that after 30-35 minutes mark.

I have to admit that you were very good on this.
u mean after 30-35 mins ..the second speed is very late to kick in ? that shouldn't be ...

Normally when tire size is big like 75-77 ...u will have a bit late of second speed but when tire size smaller ..the second speed should be earlier or very nice !! ..depend how did you set the second speed ...normally I will do second speed just a bit late between 75-77 mm .....so when the tire size is about 73-74 .... is about half way of racing... It will be the time to attack and drive faster with second speed is very nice to drive.

For ur case 72.5 is very good size for qualify ...So you should set the second speed until it 's very nice to drive .




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Old 07-07-2004, 04:45 AM   #70
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Default Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by GoldFinger
Ha ha... I just want to make comparison and make sure.
Since I was the only one drove 950R and did not have enough time to dial the clutch perfectly.
Okey, here is what experienced during the race:
Using KHM (boy... ) start with 1.2mm there is slight delay but mid to high just perfect.
Then I add some turn in, nothings change, I add again untill ended up with 1.6mm!! perfect bottom launch.
But there is some other small problem, shifting point is varies too much.
Any ideas/input are welcome, thank you
950R Stock srping -- about 1.5~1.8mm gap
Mugen silver spring -- about 1.0~1.2mm gap
More power more gap

I don't like the stock spring because I felt it become too soft after 3 corners violent accelerating. Mugen's optional spring is very cheap and easy to get. Good luck!

Last edited by dino.tw; 07-07-2004 at 04:50 AM.
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Old 07-07-2004, 05:19 AM   #71
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Default Re: Re: Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by GoldFinger
Sorry bro.. I mean when clutch is dialed with 1.6mm the 2 speed shifting point is vary so much.
Around 10-15 meter diference, I dont like it. Since it happen right before back straight after (full throttle)sweeper.
You may need to check the gap between 2speed flyshoe and 2nd speed gear adapter. Try to make it very small then your car will not spin out when it shifting before back straight. I usual set my car like yours then I can use my finger to control the 2 spd. system. If you don't want it shifting so early before back straight,you can close the throttle 'slightly'. If you can be used to it,your car is "MT" and others are "AT",which is faster?
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Old 07-07-2004, 07:21 AM   #72
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Default Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by dino.tw
You may need to check the gap between 2speed flyshoe and 2nd speed gear adapter. Try to make it very small then your car will not spin out when it shifting before back straight. I usual set my car like yours then I can use my finger to control the 2 spd. system. If you don't want it shifting so early before back straight,you can close the throttle 'slightly'. If you can be used to it,your car is "MT" and others are "AT",which is faster?
I never know how to control 2nd speed like that before ..interesting.... But I don't think I can do ...my finger is always want to full throttle ......



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Old 07-07-2004, 08:38 PM   #73
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Default Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by MrChan
u mean after 30-35 mins ..the second speed is very late to kick in ? that shouldn't be ...

Normally when tire size is big like 75-77 ...u will have a bit late of second speed but when tire size smaller ..the second speed should be earlier or very nice !! ..depend how did you set the second speed ...normally I will do second speed just a bit late between 75-77 mm .....so when the tire size is about 73-74 .... is about half way of racing... It will be the time to attack and drive faster with second speed is very nice to drive.

For ur case 72.5 is very good size for qualify ...So you should set the second speed until it 's very nice to drive .
Thanks for your valuable input.
After 15min marks it shoft earlier already and getting sooner and sooner after 30 minutes marks. Which is very bad for me coz it happen right on end of the bend (sweeper).
Anyway, now I know the checkpoint.

With full rear tire 75-77(35R) do you feel the car handles consistantly throughout 45 min. mains ?
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Old 07-07-2004, 08:44 PM   #74
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Default Re: Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by dino.tw
950R Stock srping -- about 1.5~1.8mm gap
Mugen silver spring -- about 1.0~1.2mm gap
More power more gap

I don't like the stock spring because I felt it become too soft after 3 corners violent accelerating. Mugen's optional spring is very cheap and easy to get. Good luck!
Thanks for confirmed it, at least Im going to right direction.
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Old 07-07-2004, 09:31 PM   #75
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Default Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Track Width

Quote:
Originally posted by dino.tw
You may need to check the gap between 2speed flyshoe and 2nd speed gear adapter. Try to make it very small then your car will not spin out when it shifting before back straight. I usual set my car like yours then I can use my finger to control the 2 spd. system. If you don't want it shifting so early before back straight,you can close the throttle 'slightly'. If you can be used to it,your car is "MT" and others are "AT",which is faster?
wow..wow.. very interesting about MT - AT
It is very difficult but that is could be my own problem (inconsistantly trigger closing).
Thanks, I will put more attention on this.
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