'+2 High Roll Centre' on DEX410

[Chesty]

Is there any reason why every set up sheet for the DEX410 uses -2 low roll centre on the rear front suspension hanger?

From what I have read & now tried the +2 high roll centre appears to 'lock in' the rear end... There seems to be more mechanical grip at the rear.

I've always struggled with the 410 rear end being a bit 'loose'.

Any input would be appreciated?

[AmiSMB]

I think the only problem with running the rear front block in the +2 position then the minimum antisquat is 1.8 degrees where as you can go from 0 through to 3 degrees in 0.5 degree steps as per Durango V3 rear antisquat plate tech tip I have to admit I quite like running it with the +2 up and the 3 inster with the 3 at the top seems very good.

[Chalkie]

Originally Posted by AmiSMB

I think the only problem with running the rear front block in the +2 position then the minimum antisquat is 1.8 degrees where as you can go from 0 through to 3 degrees in 0.5 degree steps as per Durango V3 rear antisquat plate tech tip I have to admit I quite like running it with the +2 up and the 3 inster with the 3 at the top seems very good.

You can use the old style 0 rear hanger to get 0 deg antisquat with the +2 roll center.

If you check the set up sheets Nathan Waters sometime uses the +2 roll center at worksop.

[Hulk]

Hi,

this is my experience with the +2 & -2 roll centre block:


+2 advantages

• Better over bumps (less driveshaft plunge)
• Rear feels more locked in

+2 disadvantages

• Less steering
• increased chance of grip roll (the rear inside wheel tends to lift, causing a jacking effect on high grip tracks)
• Although the rear feels more locked in, when it does break traction it does so in an abrupt way

-2 advantages

• More steering
• Less grip roll (i always use -2 on carpet/astro tracks as it really helps reduce grip roll)

-2 disadvantages

• Worse over bumps (increased driveshaft plunge)
• Makes the rear feel looser on the rear (good if you like an aggressive car and faster if you can hang onto it!)

Nathan tends to use +2 at Worksop but only for the first few rounds of qualifying when the tyres are bedding in. Once the tyres have scrubbed in and gripping well, he will switch back to -2 in order to gain more steering.

Hope this helps.

Craig.

[Chesty]

Cheers Craig.

That's very helpful

[Chalkie]

Originally Posted by Hulk

Hi,

this is my experience with the +2 & -2 roll centre block:



+2 advantages

• Better over bumps (less driveshaft plunge)
• Rear feels more locked in

+2 disadvantages

• Less steering
• increased chance of grip roll (the rear inside wheel tends to lift, causing a jacking effect on high grip tracks)
• Although the rear feels more locked in, when it does break traction it does so in an abrupt way

-2 advantages

• More steering
• Less grip roll (i always use -2 on carpet/astro tracks as it really helps reduce grip roll)

-2 disadvantages

• Worse over bumps (increased driveshaft plunge)
• Makes the rear feel looser on the rear (good if you like an aggressive car and faster if you can hang onto it!)

Nathan tends to use +2 at Worksop but only for the first few rounds of qualifying when the tyres are bedding in. Once the tyres have scrubbed in and gripping well, he will switch back to -2 in order to gain more steering.

Hope this helps.

Craig.

Have you tested the TD330308 low roll center hanger? Would I be right in thinking it would help on a smooth very high grip surface such as silverstones indoor astro track?