Uphill Racers

Go Back   Uphill Racers > Technical > Rules & Reg's
Register FAQ Members List Calendar Downloads Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 05-06-17, 21:02
magicaltrev magicaltrev is offline
Senior Member
 
Join Date: Mar 2014
Location: Bristol
Posts: 294
magicaltrev is on a distinguished road
MX5 hardtop & half-cage

I've got a mk3 MX5 that I compete in the road going class. I'm a little concerned about my rollover protection when competing. Because of the way in which the roof folds down, the aftermarket rollbars are a single hoop with no rear triangulation due to the roof mechanism.
Clearly, there's a risk of the hoop folding forward or back in an accident.

The only other option is to buy a Safety Devices half cage but this requires removal of the roof.

Is it considered legal to remove the roof but replace it with either an OEM hardtop or aftermarket hardtop?

11.4.1. Silhouette of the vehicle must remain unaltered in construction, dimension and material. The silhouette will be taken in the condition in which the car competes (convertible closed cars competing with the hood or top not erected shall have the silhouette determined in that condition).

I think the hardtop is valid here

11.4.7. All working equipment fitted as standard (heater, window mechanisms, sunroof, door handles) must remain operable at all times.

Sadly, I don't necessarily think it's valid here?

I'm trying to keep:
...to the letter of the rules
... at least to the spirit of the rules
... but most of all, safe.

I don't think I'll gain any performance from this, the weight will increase as a result of the cage.

What do you think?
Reply With Quote
  #2  
Old 06-06-17, 08:08
BlueGriff's Avatar
BlueGriff BlueGriff is offline
Senior Member
 
Join Date: May 2008
Posts: 165
BlueGriff is on a distinguished road
It may be worth talking with one of the bespoke rops companies.

Caged in Frome are very capable but there must be others. They may be able to make something that will fit inside the existing roof, ideally you should take the car any yourself so they know where the seat needs to be.

In my experience the cost is no more than an off the shelf item but the end result is rather better.
Reply With Quote
  #3  
Old 06-06-17, 08:27
Lolat492 Lolat492 is online now
Senior Member
 
Join Date: Apr 2010
Posts: 2,460
Lolat492 will become famous soon enough Lolat492 will become famous soon enough
Come to Loton Park this weekend and ask a scrutineer if close to you maybe?
There is a boxster that races cages with a factory hardtop on or off.
Lots of MGBs race with hard tops on.
Reply With Quote
  #4  
Old 06-06-17, 08:29
image's Avatar
image image is offline
Freelance Wing Mangler
 
Join Date: Jan 2007
Location: Aberdeenshire
Posts: 315
image is on a distinguished road
Surely an oem hardtop, if fitted, would be considered one of the original silhouettes of the vehicle??
K
Reply With Quote
  #5  
Old 06-06-17, 11:15
magicaltrev magicaltrev is offline
Senior Member
 
Join Date: Mar 2014
Location: Bristol
Posts: 294
magicaltrev is on a distinguished road
Quote:
Originally Posted by image View Post
Surely an oem hardtop, if fitted, would be considered one of the original silhouettes of the vehicle??
K
This is what I'm hoping, but doesn't it break 11.4.7?
11.4.7. All working equipment fitted as standard (heater, window mechanisms, sunroof, door handles) must remain operable at all times.

This suggests that if I use the hardtop (OEM or aftermarket) but remove the soft top (to fit the cage) then it can't be operable.

I'm competing at Abingdon CAR-nival this weekend so I'll certainly ask a scrutineer then, thought I'd ask here in case somebody had had similar experiences in this area.
Reply With Quote
  #6  
Old 06-06-17, 12:06
Blackadder Blackadder is offline
Junior Member
 
Join Date: Jan 2015
Posts: 20
Blackadder is on a distinguished road
I've seen Elises sprinting without the removable roof panel .Its not operable if it isn't fitted .
Reply With Quote
  #7  
Old 06-06-17, 12:27
magicaltrev magicaltrev is offline
Senior Member
 
Join Date: Mar 2014
Location: Bristol
Posts: 294
magicaltrev is on a distinguished road
Quote:
Originally Posted by Blackadder View Post
I've seen Elises sprinting without the removable roof panel .Its not operable if it isn't fitted .
That's an interesting point.
Reply With Quote
  #8  
Old 06-06-17, 12:43
Steve Wilkinson's Avatar
Steve Wilkinson Steve Wilkinson is offline
Senior Member
 
Join Date: Jan 2007
Location: Southport
Posts: 4,359
Steve Wilkinson will become famous soon enough
Quote:
Originally Posted by Blackadder View Post
I've seen Elises sprinting without the removable roof panel .Its not operable if it isn't fitted .
In theory the removable/foldable roof panel would have to be carried in the car as "original equipment" wouldn't it?
__________________
He was stopped stationary - James Hunt
Reply With Quote
  #9  
Old 07-06-17, 14:36
giollakris giollakris is offline
Junior Member
 
Join Date: Mar 2017
Location: Roscommon
Posts: 14
giollakris is on a distinguished road
YES ye can refit a hard top instead of the soft top and still remain in road going If that is the way ye wish to go tis no a problem and I'm a scrutineer they used to do it to M G fs when they first came out
Reply With Quote
  #10  
Old 07-06-17, 21:43
magicaltrev magicaltrev is offline
Senior Member
 
Join Date: Mar 2014
Location: Bristol
Posts: 294
magicaltrev is on a distinguished road
Thanks everyone
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 10:10.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright© 2007-2017 www.uphillracers.com