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Harness Bar Part 2


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#1 paulb

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Posted 11 June 2003 - 08:29 PM

Some of you will remember the saga with Safety Devices and trying to get a harness bar for my VX. After much messing around we parted company with them having wasted a large amount of my time and unwilling to develop anything for under £1500.

The problem with the VX is that it does not have the harness bar bushes in the roll bar that the S2 Elise has. Therefore, S2 harness bars will not fit. Ricky has developed a solution using the existing belt mounts and this suits his needs for a lightweight solution for his track toy.

However, I wanted a solution that need not require the rear trim to be removed and also allowed the standard belts to be retained for road use. Safety Devices produced one such bar about 2 years ago but were unable to use the pattern again as they couldn't find it. I was lucky enough to see that bar and it set me thinking.

I have been able to find another roll cage design and manufacture specialist in Cambridgeshire and have been working closely with them for the last 6 weeks. They have developed a bar which is removeable when not required. As there are no mounting bushes in the roll bar, it does require a threaded block to be welded to the rollbar. This can be done in the car, with just the removal of seats and rear trim.

The guys developing this were not comfortable with relying on the current top seat belt mount, although this was considered.

The block is shown below:

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As you can see, a small amount of the rear trim has to be cut away.

The bar has been bent to allow it to go as close as possible to the speakers. This allows the driver's seat to go back to the penultimate notch, if required. It is held in with four bolts.

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The bar is powder coated to give it a high strength, high quality finish. It has a slight satin finish to be as close as possible to the rollbar.

I managed to install mine this afternoon and it can be taken out or put in in under 10 minutes.

There was some interest in a group buy previously. If people would like to have a harness bar there are two solutions:

1. Kit of parts - 1 bar (powder coated), 2 blocks for welding onto rollbar (bare steel), 4 bolts, 4 washers, 4 crimp washers
2. Fitted solution - blocks welded to your car in Cambridgeshire and complete unit installed by professionals. Blocks will be brush painted black.

The cost of option 1 is £140 and option 2 is £290. It sounds like a lot for fitting, but with all the trim removal and refitting, it is over half a days work. The welding is quite slow as it is important to not overheat the bodywork.

The plan is to offer the bar through the owner's club as an ongoing product line (like the clothing), but there is a minimum order quantity with the powder coaters so to get this price, a few orders up front would greatly help.

cheers

Paul

Edited by paulb, 11 June 2003 - 08:30 PM.


#2 R1 nur

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Posted 11 June 2003 - 09:22 PM

Neat solution. Had not considered it before. 1. How heavy is it? 2. Does the roll bar fit in the boot? ( I guess that does'nt really matter actually! ) 3. If it is for a harness where do you leg straps secure? When I get back from my ring trip I will know how vulnerable I felt....... INTERESTED.

#3 Ricky2772

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Posted 11 June 2003 - 09:45 PM

When I get back from my ring trip I will know how vulnerable I felt.......

INTERESTED.

believe me, it's a day-and-night difference... :o

I would not enter a track anymore, if only with the standard belts...it just feels silly! :P

...it's one of those things that makes you think...how the heck it took me SO long to get'em installed ?!? :huh: :rolleyes:

on a side note, what kind of belt-attachment will you get on such bar? :unsure:

Edited by Ricky2772, 11 June 2003 - 09:46 PM.


#4 R1 nur

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Posted 11 June 2003 - 10:24 PM

My Caterham had a harness and it was a pain in the neck. But I have an open mind.... (Father in law just did not get the Caterham!!!!

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#5 Ricky2772

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Posted 11 June 2003 - 10:28 PM

is that you with the bank-robber hat ??! :o :lol: :lol:

#6 Thorney

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Posted 11 June 2003 - 10:41 PM

Ricky, they'll use a loop harness. The bolt one rattle like buggery.

#7 R1 nur

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Posted 11 June 2003 - 10:49 PM

is that you with the bank-robber hat ??! :o :lol: :lol:

Yes!

#8 paulb

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Posted 12 June 2003 - 06:37 AM

OK, I hope to answer all the questions below:

1. How heavy is it?
2. Does the roll bar fit in the boot? ( I guess that does'nt really matter actually! )
3. If it is for a harness where do you leg straps secure?


1. Dunno, I didn't weigh it. Not too bad! I'll pop it out today and check.
2. Dunno. If you can get it through the opening, it'll certainly fit. I'll try that as well later when the bar is out of the car.
3. Lap belts can be fasted either to the standard mounting points for the standard seat belts (on the seat frame) or by drilling into the chassis floor and using a load spreader to ensure the bolts aren't pulled out through aluminium. These are available from Elise Parts.

on a side note, what kind of belt-attachment will you get on such bar?


As Thorney says, I have chosen to get wrap around harnesses as bolt ins can rattle a lot. (How Thorney knows how much buggery rattles is beyond me!) The stock items the club holds will also be for wrap around as it is the cheaper option for the bar. However, if people come in on the group buy and want to have inserts for bolt in harnesses, they are available for £40 extra.

My car has been measured so that the plans include the locations for bolt inserts. There are two options available. One is with the normal seats and the other is with them closer together for seats with cutouts. For £70 extra, it is possible to have both options fitted, in case you plan to change seats.

My Caterham had a harness and it was a pain in the neck.


One of the key design criteria for this was that it should be possible to retain the normal seat belts as well. So, for road use, you can keep the normal belts if you wish and just use the harnesses on track. Much easier.

#9 Ricky2772

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Posted 12 June 2003 - 08:05 AM

As Thorney says, I have chosen to get wrap around harnesses as bolt ins can rattle a lot. (How Thorney knows how much buggery rattles is beyond me!)

that's something I was afraid of, but luckily the sandwiched-bolt keeps the belt attachment snugly in place, with minimal play and no tinning sounds, still free to move tho'....phew! B)

#10 paulb

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Posted 12 June 2003 - 09:15 AM

OK, harness bar is back out of the car. It will fit in the boot. You have to be a bit careful to slide it through the opening carefully. Sorry Ricky, it weighs 2.2 kg! Paul

#11 Marco Polo

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Posted 12 June 2003 - 12:44 PM

Hi all ! (first post here ! :) ) Even though I do not leave in UK but in Paris - France... I would definitively be interested in this bar (I may be able to do a trip to UK for this... my brother in law is english (from London) ;) )... Be seeing you

#12 paulb

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Posted 13 June 2003 - 09:11 PM

Excellent Marco... Be great to see you if you come over. Anybody else want to chip in on the first batch of bars?




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