Front anti roll bar

Front anti roll bar

Author
Discussion

gixermark

Original Poster:

742 posts

186 months

Friday 2nd August 2019
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Hi guys,

Are there different 'weights' of anti roll bar available? Do they vary by overall bar thickness to differentiate?

Do any of the racers tend to go for a bespoke bar with adjustment?

HustleRussell

24,602 posts

159 months

Friday 2nd August 2019
quotequote all
Bars are made in narrow track width and wide track, varying thicknesses, the rubber bushes are colour coded... main ones are;
1/2” Orange
5/8” Blue
11/16”? Red
3/4” Green

Which bar is best depends on whether you have a rear ARB fitted and how it’s adjusted, overall setup, LSD or no, wet or dry etc etc

Infinitely adjustable front ARBs were never supplied by Caterham and tend to be prohibited by racing regs- which is probably a good thing because the incremented bars are choice enough. Racers might carry two or three, and may dispense with ARBs altogether, usually if the session looks to be wet throughout.

Edited by HustleRussell on Friday 2nd August 23:26

HustleRussell

24,602 posts

159 months

Friday 2nd August 2019
quotequote all
P.S. Rake has a big impact on the way the car behaves in roll, check and adjust this before experimenting with bars if you haven’t already. I have spent half a season trying to compensate for excessive oversteer with bars before realising that the 15mm of rake I had on the car was way too high

gixermark

Original Poster:

742 posts

186 months

Sunday 4th August 2019
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Cheers guys, I didn't notice a colour - but will measure....

It's not for a caterham series.... So may look an a bespoke adjustable one. Would help when setting up to quickly disconnect the bar too.

andy97

4,691 posts

221 months

Sunday 4th August 2019
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HustleRussell said:
Infinitely adjustable front ARBs were never supplied by Caterham and tend to be prohibited by racing regs
Really? I am surprised that they tend to be prohibited, why? My ex Graduates car was supplied with a single adjustable blade type front ARB.

stevem2k

8 posts

168 months

Monday 5th August 2019
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Freestyle made an adjustable blade, I have one on mine. It's generally set to full soft though . I fitted multiple socket ends to the rear arb to allow quick changes & disconnection.


gixermark

Original Poster:

742 posts

186 months

Tuesday 6th August 2019
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Cheers guys.... definitely something I need to investigate

ForzaGilles

557 posts

223 months

Wednesday 7th August 2019
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HustleRussell said:
P.S. Rake has a big impact on the way the car behaves in roll, check and adjust this before experimenting with bars if you haven’t already. I have spent half a season trying to compensate for excessive oversteer with bars before realising that the 15mm of rake I had on the car was way too high
ISTR 15mm is pretty much a standard rake - I ran mine with that and it was fine. Did you try disconnecting the RARB? I appreciate there are lots of other variables smile

HustleRussell

24,602 posts

159 months

Wednesday 7th August 2019
quotequote all
ForzaGilles said:
HustleRussell said:
P.S. Rake has a big impact on the way the car behaves in roll, check and adjust this before experimenting with bars if you haven’t already. I have spent half a season trying to compensate for excessive oversteer with bars before realising that the 15mm of rake I had on the car was way too high
ISTR 15mm is pretty much a standard rake - I ran mine with that and it was fine. Did you try disconnecting the RARB? I appreciate there are lots of other variables smile
I thought so too, hence it was my starting point. I was wasting speed with mid-corner oversteer and was constantly faffing around with bars. My ARBs would be wildly different one circuit to the next, rear often disconnected altogether and even so it never seemed to be 'just right'. I like a soft car but it seemed you needed some roll stiffness for fast corners and paid little penalty in the slow due to the LSD.

The car worked a lot more nicely when I reduced it to 10mm. Once I did that I found that I was messing around with bars much less. There were some people who were quick with no rake at all in the same spec car (Sigma 140 / LSD / Widetrack / 6" list 1Bs). I wish I'd experimented more, alas only had the car for one season.

upsidedownmark

2,120 posts

134 months

Thursday 8th August 2019
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No racing god, but the at what fuel level did you measure the rake? Mine gets decidedly more lively towards the end of the tank, I'm lead to believe that's normal and due to the rake increasing as the fuel comes off.

Adjustment wise I've settled on a red bar (narrow), which leaves me somewhere near the middle of the adjustable rear. That's just trackdays mind.

HustleRussell

24,602 posts

159 months

Thursday 8th August 2019
quotequote all
upsidedownmark said:
No racing god, but the at what fuel level did you measure the rake? Mine gets decidedly more lively towards the end of the tank, I'm lead to believe that's normal and due to the rake increasing as the fuel comes off.

Adjustment wise I've settled on a red bar (narrow), which leaves me somewhere near the middle of the adjustable rear. That's just trackdays mind.
No racing god neither hence I never once noticed that, I was only doing sessions of little more than 20 mins so the fuel difference over the session would've been something like 8kg.

I would've corner weighted it on the series minimum weight which for me was ~90kg in the drivers' seat and 10l of fuel or so.

Should've really done the lead ballast on the passengers' floor.

Red bar was the most popular but I liked my blue. Never found a purpose for the orange one. Rear was on one of the two softest notches or disconnected altogether.

upsidedownmark

2,120 posts

134 months

Sunday 11th August 2019
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Ah, I'm looking at the difference between a full tank and 'eek, I'd probably better go in and fill up'. That's probably rather more noticeable than 8kg!

SimonRogers

146 posts

157 months

Tuesday 27th August 2019
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I sell the Blade type ARB. We have them in stock and ready to ship for Wide Track and SV chassis.

Eugene7

739 posts

193 months

Thursday 29th August 2019
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I have the original 'blade' type on Eugene, but have had a couple of failures - now fixed.
But I think Simon's versions were re-designed to prevent the breakages I suffered?
(Mine were not from Simon.)

Steve

gixermark

Original Poster:

742 posts

186 months

Friday 30th August 2019
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Simon do you have a web site or details somewhere?

I might get bespoke wishbones made too... But would be interested to see a blade set up for std (wide track) wishbones

Turn7

23,502 posts

220 months

Friday 30th August 2019
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gixermark said:
Simon do you have a web site or details somewhere?

I might get bespoke wishbones made too... But would be interested to see a blade set up for std (wide track) wishbones
Simon is Meteor Motorsports...

https://www.meteormotorsport.com/

SimonRogers

146 posts

157 months

Tuesday 3rd September 2019
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Tx Turn7