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bukkaz
Fujiwara
bukkaz

Posts : 3442
Join date : 2012-12-09
Age : 30
Location : Stafford, England

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PostSubject: front caster   front caster Icon_minitimeFri May 03, 2013 6:11 am

Hey people I just wanted to know what the pro's and con's are of adjusting the caster and what negative caster does and what positive caster does
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KraZe
King of Eurobeat
KraZe

Posts : 5218
Join date : 2012-12-08
Age : 25
Location : San Juan, PR

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 6:31 am

If I'm not mistaken the caster is a way of adjusting the wheelbase of the car. Lowering the degree of caster will slightly shorten the wheelbase giving it more "agile" behavior (quicker turn-in, quicker transitions, tighter turning radius, etc.) but it comes at the expense of less stability, more oversteer, and more "twitch-like" steering. A higher degree of caster creates a longer wheelbase which adds stability and grip at the expense of larger turning angles, more "sluggish" steering and more understeer.

However I'm no expert at tuning (I stick to stock/sport suspensions now) so correct me if I'm wrong. pale

Btw I think this belongs in General Chat.

_
Miata Gen 2 - 4:31.750 (NDH) || Mazdaspeed RX8 - 4:34.041 (NDH) || Acura NSX '97 - 4:35.869 (NHC)
front caster 8412241479_fb00c8c415_z
STREETVERSION | GT: il KraZe li | PSN: StV_KraZe | Fanatec CSR w/ CSR Elite Pedal | K. Huertas
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bukkaz
Fujiwara
bukkaz

Posts : 3442
Join date : 2012-12-09
Age : 30
Location : Stafford, England

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 6:37 am

Thanks kraze Smile I lowered the caster lastnight on my 86 and it felt great. It felt like it gripped better too and I can now take certain corners without braking Smile its probably just my driving style that it feels grippy
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KraZe
King of Eurobeat
KraZe

Posts : 5218
Join date : 2012-12-08
Age : 25
Location : San Juan, PR

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 6:42 am

Then maybe I got it backwards lol

_
Miata Gen 2 - 4:31.750 (NDH) || Mazdaspeed RX8 - 4:34.041 (NDH) || Acura NSX '97 - 4:35.869 (NHC)
front caster 8412241479_fb00c8c415_z
STREETVERSION | GT: il KraZe li | PSN: StV_KraZe | Fanatec CSR w/ CSR Elite Pedal | K. Huertas
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Hybrid Comet
Touge Veteran
Hybrid Comet

Posts : 1110
Join date : 2012-12-19
Age : 33
Location : Finland

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 8:51 am

Kraze you got it right, excatly Smile
It affects grip too slightly, since it highly modifies camber angles.

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Member of illuminati
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bukkaz
Fujiwara
bukkaz

Posts : 3442
Join date : 2012-12-09
Age : 30
Location : Stafford, England

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 9:35 am

So lower setting guves you better turn in and stuff at the expence of stability and highter setting gives you better stability at the expence of turn in?
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KraZe
King of Eurobeat
KraZe

Posts : 5218
Join date : 2012-12-08
Age : 25
Location : San Juan, PR

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 9:47 am

^Basically, although it's more like the ability of the car to rotate rather than just the turn-in.

_
Miata Gen 2 - 4:31.750 (NDH) || Mazdaspeed RX8 - 4:34.041 (NDH) || Acura NSX '97 - 4:35.869 (NHC)
front caster 8412241479_fb00c8c415_z
STREETVERSION | GT: il KraZe li | PSN: StV_KraZe | Fanatec CSR w/ CSR Elite Pedal | K. Huertas
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bukkaz
Fujiwara
bukkaz

Posts : 3442
Join date : 2012-12-09
Age : 30
Location : Stafford, England

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 10:01 am

I will mess around with it later Smile
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MiNd
Founder
MiNd

Posts : 2058
Join date : 2012-12-07
Age : 29

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 10:16 am

My understanding of it is, the more caster, the more responsive your car is in turns.....but.....the more caster, the more unstable your car is.

So my take on it is, as long as you can control the stability, the higher the better

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Koolaid
Touge Veteran
Koolaid

Posts : 1721
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Age : 29
Location : Virginia Beach, VA

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 11:54 am


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Peacock
Kaido Aficionado
Peacock

Posts : 387
Join date : 2013-04-22
Age : 26
Location : Palos Verdes, CA

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PostSubject: Re: front caster   front caster Icon_minitimeFri May 03, 2013 3:51 pm

Definitely just spent a good half hour watching engineering videos lol. Thanks Koolaid!

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A:600 4:49.239 NHC-------------------------------------------------B:500 4:44.384 NDH
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Edward40Hands
Kaido Aficionado
Edward40Hands

Posts : 458
Join date : 2012-12-13
Age : 30
Location : Mont Clare

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PostSubject: Re: front caster   front caster Icon_minitimeMon May 06, 2013 12:35 pm

Kraze you werent far off as far as forza goes...

Bukkaz 2 other things to consider:

1. Changing your caster will change you active camber, you may want to use the telemetry to adjust your camber after making caster changes. Less caster will need more negative camber.

2. More caster will increase what some call "returnability" of the steering wheel, causing the front tires to return to center easier when you "let go of the wheel"
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