Jump to content


Photo

Upgraded Front Arb - Increased Rear Grip?


  • Please log in to reply
36 replies to this topic

#21 Bargi

Bargi

    Scary Internerd

  • PipPipPipPipPipPip
  • 4,483 posts
  • Gender:Male
  • Location:London

Posted 21 October 2018 - 06:09 PM

What Nitrons do  you have 40 or 46's

i was going to ask the same :D



#22 Captain Vimes

Captain Vimes

    Scary Internerd

  • PipPipPipPipPipPip
  • 2,755 posts
  • Gender:Male
  • Location:South East
  • Interests:Motorbikes, VX220, Procrastination

Posted 21 October 2018 - 10:05 PM

For me, it added understeer which improved stability. Didn’t really notice it increasing rear grip but it definitely changed the balance.

Here’s a vid at Snett comparing with and without. I think the rest of the setup was pretty much the same.

https://youtu.be/YADpApZLZVg

I ended up going back to standard ARB and slightly stiffer front springs (still wasn’t happy with the setup though).

Edited by Captain Vimes, 21 October 2018 - 10:07 PM.


#23 Aerodynamic

Aerodynamic

    Billy No Mates

  • PipPipPipPipPip
  • 1,455 posts

Posted 22 October 2018 - 07:13 AM

I think conclusion is.
A stiffer ARB is going to help you none to a little.
A LSD is going to help you little to a lot.
And a traction control will help a lot.

If it is to prevent spinning rear wheels.

Br, Per

#24 Ivor

Ivor

    Billy No Mates

  • 1,873 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 22 October 2018 - 10:57 AM

I think conclusion is.
A stiffer ARB is going to help you none to a little.
A LSD is going to help you little to a lot.
And a traction control will help a lot.

If it is to prevent spinning rear wheels.

Br, Per

10 of us had the variable rate racelogic TCS fitted at the weekend... definitely works in a straight line, trying it on track at llandow Thursday

#25 chris_uk

chris_uk

    I Fancy Joe

  • PipPipPipPipPipPipPip
  • 10,060 posts
  • Gender:Male
  • Location:Leeds UK

Posted 22 October 2018 - 12:39 PM

Softening up the rear a click or two may help on corner exit traction, but into and during a corner it may make it start to slide as it will overwhelm the damping, you really need to test and see where the balance is on the rear first then alter the front to suit.

Thats what i would start with anyway.

#26 Firthy

Firthy

    Super Duper Member

  • PipPipPip
  • 576 posts
  • Gender:Male
  • Location:Surrey

Posted 22 October 2018 - 04:25 PM

Yeah as a above my Hoffmans 1 way dampers work best at 16-17 clicks from hard.

 

This is a very different working range to most standard Nitron valving.



#27 Firthy

Firthy

    Super Duper Member

  • PipPipPip
  • 576 posts
  • Gender:Male
  • Location:Surrey

Posted 22 October 2018 - 04:27 PM

If I run them any stiffer the car doesn't generate grip....



#28 hughcam

hughcam

    Super Duper Member

  • PipPipPip
  • 730 posts
  • Gender:Male
  • Location:Hemsworth, West Yorkshire
  • Interests:driving, motorcycling, snowboarding, v12 lawn mowers

Posted 23 October 2018 - 10:31 AM

I run 2015 spec hoffman 40's. Damp 13- 15 clicks form soft on the front 15 clicks form soft rear. 

 

A 1 min clip pre front damping increase at Curbs:

 

https://youtu.be/MuL5bPw4VkI

 

post tweek:

 

https://youtu.be/gbe3j0TbriY 

 

You can see how much more stable the car is post tweek ( I also smoothed up my driving a bit). My thinking is that keeping the car flatter through anti roll increase instead of upping the damping is better as it leaves the dampers to be more supple in the braking phase..

 

I guess the best way is to give it a go!



#29 hughcam

hughcam

    Super Duper Member

  • PipPipPip
  • 730 posts
  • Gender:Male
  • Location:Hemsworth, West Yorkshire
  • Interests:driving, motorcycling, snowboarding, v12 lawn mowers

Posted 23 October 2018 - 10:32 AM

For me, it added understeer which improved stability. Didn’t really notice it increasing rear grip but it definitely changed the balance.

Here’s a vid at Snett comparing with and without. I think the rest of the setup was pretty much the same.

https://youtu.be/YADpApZLZVg

I ended up going back to standard ARB and slightly stiffer front springs (still wasn’t happy with the setup though).

 

Thanks for that! I watched this vid last night and it looks like the car was much more consistent if not as fun. 

 

Did you go quicker with the ARB?



#30 Rosssco

Rosssco

    Scary Internerd

  • PipPipPipPipPipPip
  • 4,180 posts
  • Gender:Male
  • Location:Aberdeen

Posted 23 October 2018 - 11:36 AM

My thinking is that keeping the car flatter through anti roll increase instead of upping the damping is better as it leaves the dampers to be more supple in the braking phase..

 
That's the general philosophy behind the Cornering Force ARB's - use stiffer front and additional rear ARB's to allow the spring rates and damping to be backed off.

 

It works well on the road, but I've never tried it on track.



#31 Aerodynamic

Aerodynamic

    Billy No Mates

  • PipPipPipPipPip
  • 1,455 posts

Posted 23 October 2018 - 03:06 PM

Works in a straight line? could you explaine?

Let me know how it worked on track. with or without LSD?

 

Br, Per

 

 

 

I think conclusion is.
A stiffer ARB is going to help you none to a little.
A LSD is going to help you little to a lot.
And a traction control will help a lot.

If it is to prevent spinning rear wheels.

Br, Per

10 of us had the variable rate racelogic TCS fitted at the weekend... definitely works in a straight line, trying it on track at llandow Thursday

 

 



#32 Captain Vimes

Captain Vimes

    Scary Internerd

  • PipPipPipPipPipPip
  • 2,755 posts
  • Gender:Male
  • Location:South East
  • Interests:Motorbikes, VX220, Procrastination

Posted 23 October 2018 - 05:08 PM


For me, it added understeer which improved stability. Didn’t really notice it increasing rear grip but it definitely changed the balance.

Here’s a vid at Snett comparing with and without. I think the rest of the setup was pretty much the same.

https://youtu.be/YADpApZLZVg

I ended up going back to standard ARB and slightly stiffer front springs (still wasn’t happy with the setup though).


Thanks for that! I watched this vid last night and it looks like the car was much more consistent if not as fun.

Did you go quicker with the ARB?

No. With passenger the lap time was pretty much identical.

To be fair the whole setup needs to be matched though. I had 350/450 lb springs and I suspect the 1”ARB was doing weird things when combined with relatively soft main springs.

What do the lotus cup and Elise trophy boys run in terms of dampers/ARB/Geo? After years of trial and error I suspect they’ve got a good feel for the fastest setup so I’d probably start there. Then spend time learning the setup and don’t change anything until you’re within a second of their lap times (assuming power/weight are ball park similar).

#33 Bargi

Bargi

    Scary Internerd

  • PipPipPipPipPipPip
  • 4,483 posts
  • Gender:Male
  • Location:London

Posted 23 October 2018 - 08:43 PM

Where's Scuffers when you need him 😂

Sent from my SM-G950F using Tapatalk



#34 hughcam

hughcam

    Super Duper Member

  • PipPipPip
  • 730 posts
  • Gender:Male
  • Location:Hemsworth, West Yorkshire
  • Interests:driving, motorcycling, snowboarding, v12 lawn mowers

Posted 24 October 2018 - 08:12 AM

 

 

For me, it added understeer which improved stability. Didn’t really notice it increasing rear grip but it definitely changed the balance.

Here’s a vid at Snett comparing with and without. I think the rest of the setup was pretty much the same.

https://youtu.be/YADpApZLZVg

I ended up going back to standard ARB and slightly stiffer front springs (still wasn’t happy with the setup though).


Thanks for that! I watched this vid last night and it looks like the car was much more consistent if not as fun.

Did you go quicker with the ARB?

No. With passenger the lap time was pretty much identical.

To be fair the whole setup needs to be matched though. I had 350/450 lb springs and I suspect the 1”ARB was doing weird things when combined with relatively soft main springs.

What do the lotus cup and Elise trophy boys run in terms of dampers/ARB/Geo? After years of trial and error I suspect they’ve got a good feel for the fastest setup so I’d probably start there. Then spend time learning the setup and don’t change anything until you’re within a second of their lap times (assuming power/weight are ball park similar).

 

 

I am trying to find the Elise Trophy times which is proving to be a bit hard... 

 

I think the majority run a front 1 inch ARB but slightly stiffer spring rates so I am going to give it a go. 



#35 Captain Vimes

Captain Vimes

    Scary Internerd

  • PipPipPipPipPipPip
  • 2,755 posts
  • Gender:Male
  • Location:South East
  • Interests:Motorbikes, VX220, Procrastination

Posted 24 October 2018 - 06:46 PM

https://www.tsl-timi.../search?q=Lotus

Keep an eye on the weather at the bottom left of the page ie. it looks like it was snowing in March 18 at Snett...

#36 Zoobeef

Zoobeef

    Joes bedroom assistant.

  • PipPipPipPipPipPipPip
  • 11,102 posts
  • Gender:Male
  • Location:Retford/Bovington

Posted 24 October 2018 - 07:23 PM

Snett 300 last year for elise trophy was a 2:09.0



#37 hughcam

hughcam

    Super Duper Member

  • PipPipPip
  • 730 posts
  • Gender:Male
  • Location:Hemsworth, West Yorkshire
  • Interests:driving, motorcycling, snowboarding, v12 lawn mowers

Posted 25 October 2018 - 04:34 PM

Snett 300 last year for elise trophy was a 2:09.0


Much quicker than me, I was 2.16 on a sprint with cold tyres. Might be a couple seconds quicker on a flying lap.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users