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Old 15 Mar 2012, 22:21 (Ref:3041844)   #1
indigorallye
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indigorallye should be qualifying in the top 10 on the grid
Lightweight Doors

I've cut the inner skin out on my hatchback to lose a little bit of weight. The edge now has rubber panel trim all the way around it.
Will this satisfy a scrutineer? Or will they want it panelling over?



Any guidance much appreciated.
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Old 16 Mar 2012, 07:00 (Ref:3042025)   #2
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terence should be qualifying in the top 10 on the gridterence should be qualifying in the top 10 on the grid
I would play it safe and cut out panels in 1mill ally sheet.Saves the hassle and makes the doors look finished.
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Old 16 Mar 2012, 09:40 (Ref:3042092)   #3
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Agreed, Or stick the door card back on
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Old 16 Mar 2012, 10:27 (Ref:3042122)   #4
indigorallye
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indigorallye should be qualifying in the top 10 on the grid
The door cards are not full size so they won't do the job.

I will cover it over in aluminium.

Thanks fellas.
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Old 16 Mar 2012, 14:20 (Ref:3042214)   #5
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terence should be qualifying in the top 10 on the gridterence should be qualifying in the top 10 on the grid
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Originally Posted by indigorallye View Post
The door cards are not full size so they won't do the job.

I will cover it over in aluminium.

Thanks fellas.

You'r welcome,good luck with the weight loss program.
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Old 16 Mar 2012, 17:09 (Ref:3042302)   #6
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vjay48 should be qualifying in the top 10 on the grid
What does blue book say?
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Old 16 Mar 2012, 18:39 (Ref:3042340)   #7
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we had scrutineering issues at LMC with no door cards, FiA scrutes wanted panels to stop hands getting trapped in orrifices should you have an accident.

annoying as it was at the time it made sense, just something as light as possible to cover the hole, thin ally sheet and paint it black, always looks better than plain IMO.

In France we used cardboard and gaffer tape!!!
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Old 16 Mar 2012, 18:45 (Ref:3042345)   #8
Clive Brown
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Clive Brown should be qualifying in the top 10 on the grid
Do your series regs. not allow you to reskin the outer surface of the door in aluminium? Even more weight saving!
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Old 16 Mar 2012, 19:32 (Ref:3042369)   #9
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terence should be qualifying in the top 10 on the gridterence should be qualifying in the top 10 on the grid
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Originally Posted by zefarelly View Post
we had scrutineering issues at LMC with no door cards, FiA scrutes wanted panels to stop hands getting trapped in orrifices should you have an accident.

annoying as it was at the time it made sense, just something as light as possible to cover the hole, thin ally sheet and paint it black, always looks better than plain IMO.

In France we used cardboard and gaffer tape!!!


Just how they left the factory then?
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Old 16 Mar 2012, 19:53 (Ref:3042385)   #10
indigorallye
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indigorallye should be qualifying in the top 10 on the grid
I've just bought some ally to do the job.

I can use fibreglass doors if I wish, the fit is rubbish though.
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Old 16 Mar 2012, 20:27 (Ref:3042432)   #11
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JohnD should be qualifying in the top 5 on the gridJohnD should be qualifying in the top 5 on the grid
GRP doors aren't available for my car, so I made my own.
Made two moulds, from the inner and outer shells. Then castings were 'glued' together with more resin.
5kgs each, with the door hardware, no glass.
'Glass' replaced by PolyU hinged to the A-posts.
Can't post pics here easily; send you copies if you PM me.

John
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Old 16 Mar 2012, 21:53 (Ref:3042477)   #12
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Originally Posted by Clive Brown View Post
Do your series regs. not allow you to reskin the outer surface of the door in aluminium? Even more weight saving!
Just what I did with the Anglebox.
I also took all sound deadening material off from everywhere and replaced most nuts n bolts with lightweight aircraft ones, also I made a complete exhaust system from the manifold back from aluminium as are the shock absorbers, with lexan polycarbonate screens and windows. The problem is with all weight reductions on a race car is that the cost involved isn't linear and the price starts to rocket the further you go.
The car was modified in 1993 for a series with no minimum weight restriction and weighed 675 kilos in race trim.
It also helps that I'm not a tellytubby !
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Old 17 Mar 2012, 07:59 (Ref:3042600)   #13
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Just how they left the factory then?
The HArrington actually left the factory with poppered fabric door cards. very light, worked and looked good ( probably a bit of a fire hazard though!)

It wasn't a BL /BMC product Terry
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Old 17 Mar 2012, 10:04 (Ref:3042651)   #14
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terence should be qualifying in the top 10 on the gridterence should be qualifying in the top 10 on the grid
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Originally Posted by GORDON STREETER View Post
Just what I did with the Anglebox.
I also took all sound deadening material off from everywhere and replaced most nuts n bolts with lightweight aircraft ones, also I made a complete exhaust system from the manifold back from aluminium as are the shock absorbers, with lexan polycarbonate screens and windows. The problem is with all weight reductions on a race car is that the cost involved isn't linear and the price starts to rocket the further you go.
The car was modified in 1993 for a series with no minimum weight restriction and weighed 675 kilos in race trim.
It also helps that I'm not a tellytubby !

Would you believe a weight reduction of 23kgs just by removing all of those pads Gordon,at least,thats what I've had out of my 'project'. Just started on the excess tinwork.
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Old 17 Mar 2012, 15:38 (Ref:3042924)   #15
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Originally Posted by terence bower View Post
Would you believe a weight reduction of 23kgs just by removing all of those pads Gordon,at least,thats what I've had out of my 'project'. Just started on the excess tinwork.
After a number of years racing with a few "banger" drivers the weight on the Anglia has probably increased somewhat due to a few applications of P38 !
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Old 27 Mar 2012, 21:11 (Ref:3049663)   #16
indigorallye
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indigorallye should be qualifying in the top 10 on the grid
Just thought I'd let you know that I did fit the ally sheet.
I noticed a few other cars ran similar to my top pic.
I do feel happier now though!

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Old 27 Mar 2012, 21:15 (Ref:3049668)   #17
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TWRv12 should be qualifying in the top 10 on the gridTWRv12 should be qualifying in the top 10 on the grid
Door should by right be filled with impact absorbing foam

No xbars on the cage?
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Old 27 Mar 2012, 22:06 (Ref:3049705)   #18
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JohnD should be qualifying in the top 5 on the gridJohnD should be qualifying in the top 5 on the grid
Good idea, TWR.
What counts as 'energy absorbing foam'?
Easy to fill with expanding polyurethane foam (too easy! could blow the door apart) but that's a lot of Cyanide generating stuff if there were a fire.

What would you use?

John
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Old 28 Mar 2012, 07:08 (Ref:3049851)   #19
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terence should be qualifying in the top 10 on the gridterence should be qualifying in the top 10 on the grid
As good an idea as it sounds,I think you would be better to leave the door as it is.Far better to get a door bar fitted!
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Old 28 Mar 2012, 11:55 (Ref:3049981)   #20
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A door bar will only be as good as what It's fitted to and as there's nothing substantial on that door to support anything why have something that could come crashing into you in a side impact and besides there's an impact bar on the cage.
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Old 28 Mar 2012, 12:19 (Ref:3049992)   #21
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terence should be qualifying in the top 10 on the gridterence should be qualifying in the top 10 on the grid
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A door bar will only be as good as what It's fitted to and as there's nothing substantial on that door to support anything why have something that could come crashing into you in a side impact and besides there's an impact bar on the cage.

You're quite right Tim,there is a bar,perhaps easiest the raise it another four or five inches. As for the foam,cant imagine that doing any good in an impact.
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Old 28 Mar 2012, 13:28 (Ref:3050031)   #22
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Originally Posted by indigorallye View Post
Just thought I'd let you know that I did fit the ally sheet.
I noticed a few other cars ran similar to my top pic.
I do feel happier now though!

http://i118.photobucket.com/albums/o...e/93048c0e.jpg
Good job, look neat.
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Old 28 Mar 2012, 14:06 (Ref:3050044)   #23
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As for the foam,cant imagine that doing any good in an impact.
It'll make a pretty snow effect as it explodes.
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Old 28 Mar 2012, 14:56 (Ref:3050065)   #24
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terence should be qualifying in the top 10 on the gridterence should be qualifying in the top 10 on the grid
The Markers on the side of the track look better though.
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