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Brey Krause Harness Truss vs. DAS or FVD Roll Bar?

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Old 02-24-2002, 12:39 PM
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Anir
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Post Brey Krause Harness Truss vs. DAS or FVD Roll Bar?

Like many folks on this board, I've been bitten by the track bug. Eventually, I'd like to buy a dedicated 993 track car, but this is not feasible right now. Therefore, I'm looking for a minimally invasive way to add 5- or 6-point harnesses for DE events. I'd like to maintain the originality of my 993TT, since I plan to keep it forever and hand it down to the kids (God willing).

I've reviewed the archives posts on the subject, and would like to get first hand opinions of the relative advantages and disadvantages of the following options from those who own them.

1. Brey Krause Harness Bar (about $250)


2. Brey Krause Harness Truss (about $500)


3. DAS Sport-system Roll Bar ($650 - 900; occasionally on sale at Performance Products)


4. FVD Roll Bar ($770 steel, $900 aluminum)

At the present time, I'm leaning toward the harness truss, since it seems the most user friendly and roll protection is not my primary concern (though maybe it should be?). Is the truss truly strong enough for the harnesses to mount directly to it?

Any other thoughts? Thanks for the help.
Old 02-24-2002, 02:06 PM
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FELKER
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Anir,

I decided on the Truss. Here is my reasoning.

It is designed to mount harneses directly to it, it come with the "loops" bolted on. It is NOT designed to be a GIUDE..

The installtion of any rollbar makes the rear seats totally unsafe for anyone and difficult to access.

Although the DAS is a drop in installation , it requires time, energy and the usually the removal of one or both seats... 2-3 hours.. The truss comes in three parts. Mounting brackets for the B pillers and the cross member truss bolts to the mounts. 10 minute uninstall, BUT I will also remove the mounts, they would be VERY dangerous to a rear passenger in an accident. But you can install the B piller mounts, pack the rear with suff (non human) and install the cross member at the track.

Also I am putting in GT3 seat, thus the install of a DAS would require their removal.... and an hour to the install time....

Do I need the DAS roll over proctecion? When was the last time you saw or heard of a Roll over at a Driver's ED? If racing YES, Roll bar... but for driver's ED?

Finally, I like the look of the Truss and it is MUCH easier to store in the "off season" than a Roll bar will be.

I can get you any pitures of the truss, I have it sitting in my garge ready for install, and also I have the instruction from Brey Krause.

Hope this helps


I have been meaning to ask you where you took the pictures of your car? Transy? Native Lexingtonian here.. UK grad, Cat Fan....
Old 02-24-2002, 05:16 PM
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Anir
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Felker,

Thank you for your helpful post. Your reasoning sounds very similar to mine thus far.

The pictures were taken in front of Cassidy Elementary school on Tates Creek road. You may have seen posts on this board by Greg Fishman - he's also local and actually attended Transylvania Univ. Took my son to the UK vs. Arkansas game yesterday!

Any other concurring or dissenting opinions out there?
Old 02-24-2002, 05:40 PM
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Eric in Chicago
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Felker,
I would have to disagree with you, roll overs are not common but not out of the question. I have seen/been told of, 2 roll overs here in Chicago Regions DE. A great RS rolled at Blackhawk 2 years ago. Drop a wheel off in a high speed turn and try and correct, bad news. I have the DAS bar in my Cab (because it is a cab I need all the protection I can get). Think about this, If you have a harness bar in and you do roll over with enough force, your 6pt is going to hold you upright as your roof comes down to make you much shorter! If your going to in novice run groups and taking it easy, maybe you could get away with just a harness bar. For all the good the back seat does us, you might as well put a roll bar in and feel safe.
Anir, with a TT you are not going to be "taking it easy". If you have be bit by the bug, you will want a roll bar.
Old 02-24-2002, 06:36 PM
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E. J. - 993 Alumni
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Anir,

I have been through both sides of this experience, so here goes (and I bet you can already imagine what I am going to say). I had the harness bar for the last 18 months. The installation is as simple if not more than the truss. The belts just snap in and it is really simple. I am sure you have seen my DIY page about this.

I felt very secure with this setup at the track. At VIR, I hit about 145 on both straights and have had a couple of pretty fast offs too. With that said, if I were driving your car, I feel pretty confident that I would/could do an extra 20 mph at the end of both straights. Might not seem like a big difference, the the effort to stop or slow down that extra 20 mph is a lot. I would not feel that safe going that fast without a bar.

With that said, I know I never worried about the 6 point hurting in a roll over because I am 99.9% more likely to have a regular impact where the belts would help rather that a roll over. Again, though, the speed difference would scare me in your car. Of course I am not saying you will drive your car as hard as I drive mine (I hope you dont ), but still, the potential is there.

I am now in the process of finalizing the prototype OG bar/cage in my car. They need the car for two more days to finish then I will have it. I decided about 6 months ago that I am now married and thinking about kids and my priorities and outlook have changed. I now want to be as safe as possible at the track, even if I am only going 145, because we all know accidents can happen. That is why I am going with the bar from here on out. I should have it in two weeks and will certainly have it at Mid Ohio for your inspection. I don't care what bar you get, but I think if you see yourself doing at least 3 events a year and you plan on driving fast or hard, it is better to be safe than sorry.

Of course it would be easy to start with the harness bar to make sure you are really going to stick with it. You can always sell it. I sold mine before I even had to list it.

In the end, you need to get what you are comfortable with. I will say that you should not base your decision on ease of install or rear seat room because that is certainly not important. They are all easy enough to install or remove when you think about it. So it might take an extra hour for a bar since you have to remove a seat.

I hope this helps, and please feel free to ask any questions. Also, I don't expect every one to agree with me here.

E. J.
Old 02-24-2002, 06:37 PM
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Rob Wolford
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Felker~ Great reply for the BK Truss. Well thought out and well stated.

However, I respectfully offer a differing opinion for my buddy Anir. I took the BK harness truss out of my turbo and went with the DAS roll bar. I didn't like the truss that much and with the easily attained speeds in a 993TT, I wanted more protection. My beliefs were confirmed when I saw one of my teammates go off the road at the Silver State Classic last September doing 190 mph in his turbo (not a typo!). His roll cage saved his life.

The DAS unit is superbly engineered and a blast to install if you enjoy the victory of a successful DIY job. I had mine painted to match my car and it gives my car a very aggressive look - I get compliments on it all of the time. Felker is right however - no more riding in the back for the kiddies if you have a roll bar in the car.

Anir, if you go with the truss make sure no tall people ever accidentally put your seats all of the way back. I did this on mine and the sharp edges of the truss ate right into the back of my seatback


Go luck either way Anir.
Old 02-24-2002, 07:11 PM
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Greg Fishman
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Anir,
The real problem is not what type of bar you install but what type of seat you use. The best bar in the world won't do anything for you if the belts slip off your shoulder. I had the sport seats and a harness bar 5 point set up, and it never felt right, bought a race seat real soon after that. Buying a race seat and swapping it in and out for track events is a good way to go. A seat with proper holes is a must have.
You will be safer and a better driver for it, and it takes all of 15 minutes to exchange your seats.

I would get the strut tower bar and just remove it after events so you can use your rear seat if need be. Also a shorter harness is better resistant than an extra couple of feet to stretching.
I agree roll overs are fairly rare in DE's and even Club Races but they do happen and while I think a 993 is fairly strong (compared to an E36 M3,for example) I would give strong consideration to a roll bar, and even stronger consideration to getting a 944 or 944 Turbo to learn and grow with. As you do more events you will eventually have a spell where you think you are invincible and hopefully you won't do any thing but scare yourself silly and get a car full of dust.

Don't make me tell you I told you so.

Greg
Old 02-24-2002, 09:15 PM
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Robert Henriksen
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I did the DAS-rollbar over a year ago, and am very satisfied - no second guessing here.

No one was ever dumb enough to ride in my back seat before the rollbar a *second* time :-), and I can still pile stuff in the back seat even w. the bar in place. I can't fit a single big thing like a golf bag, but I have a truck I can use instead if I need to haul bigger stuff.

Besides that, my rational's been pretty much the same as what everyone else has said. What pushed me over the edge was a lift error at 100 mph in turn 7 at TWS that had me facing a distinct possibility of launching off the top of the banked turn, going sideways, into the dirt. That would have had a good chance of turning into a big-time barrel roll!

Thankfully, I stayed on the asphalt, but went out & bought the rollbar anyway!
Old 02-24-2002, 10:15 PM
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Martin S.
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I feel the need to ramble...what a great forum!!!I started with the truss...waiting for my DAS-sport bar.The truss anchors your belts...that is all, to the B pillar. If you got T-Boned in the B pillar, would the truss stay mounted? Probably, but what if it came loose?

In my case, as with lots of others on the Board, I decided to err on the side of caution and install the DAS-sport bar. The second reason, Porsche Owners Club will not let you on the Willow Springs International Raceway in a 89 or later Carrera without first having installed an "approved" roll bar. The DAS-sport, through the efforts of Jim Brady as the demo car, and my constant bitching, finally got approved.

The specs on the DAS-sport meet or exceed, PCA Club Racing Specs as well as Porsche Owners Club specs.

If you are really concerned about your safety to the nth degree, a cage is the way to go. I know it is inconvenient, but on big tracks such as Road America and Willow Springs International Raceway, where you are accelerating in 5th gear (120 mph+), a cage and a window net would be calming to me.

Roll overs and crashes in driver ed, they happen, unfortunately, all too frequently. In closing, in the words of Rick White, Chief Driving Instructor for the Porsche Owners Club tells his new students, "If you can't afford to walk away from your car after it has been rolled up into a metal ball", you shouldn't be out there. Sh.. happens in drivers Ed and Time Trials. As ominous as his words are, nobody ever gets up and walks out...the "It can't happen to me" scenario prevails.
Old 02-24-2002, 10:21 PM
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Martin S.
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[quote]Originally posted by schacht993:
<strong>I feel the need to ramble...what a great forum!!!I started with the truss...waiting for my DAS-sport bar.The truss anchors your belts...that is all, to the B pillar. If you got T-Boned in the B pillar, would the truss stay mounted? Probably, but what if it came loose?

One other thing to consider, where do you mount your inside belts? Do you get the adapter from BK and plug your lap belts into the stock receptacle? Keep in mind that on a 993, the stock inboard belts are mounted to the seat. If the seat were to come loose in a major impact...your belts have just lost their in-board anchor. Porsche Owners Club will not allow the BK adapters and requires the inboard belts to be mounted to the tub, yes, drilling a hole is required. They also insist that the sub-strap be mounted to the tub, not the seat, another hole. This is how I have my belts mounted...according to POC rules.

In my case, as with lots of others on the Board, I decided to err on the side of caution and install the DAS-sport bar. The second reason, Porsche Owners Club will not let you on the Willow Springs International Raceway in a 89 or later Carrera without first having installed a POC "approved" roll bar. The DAS-sport, through the efforts of Jim Brady as the demo car, and my constant bitching, finally got approved.

The specs on the DAS-sport meet or exceed, PCA Club Racing Specs as well as Porsche Owners Club specs for wall thickmess, etc.

If you are really concerned about your safety to the nth degree, a cage is the way to go. I know it is inconvenient, but on big tracks such as Road America and Willow Springs International Raceway, where you are accelerating in 5th gear (120 mph+), a cage and a window net would be calming to me.

Roll overs and crashes in driver ed, they happen, unfortunately, all too frequently. In closing, in the words of Rick White, Chief Driving Instructor for the Porsche Owners Club tells his new students, "If you can't afford to walk away from your car after it has been rolled up into a metal ball", you shouldn't be out there. Sh.. happens in drivers Ed and Time Trials. As ominous as his words are, nobody ever gets up and walks out...the "It can't happen to me" scenario prevails. </strong><hr></blockquote>
Old 02-24-2002, 10:40 PM
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JJayB
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You might want to check with the various clubs you'll be doing DE events and see what they require in the way of safety equipment. I've seen numerious "tech inspectors" fail cars for improper saftey rollover protection. (ie: aluminum
roll bars)
Given the speed potential of a 993tt, the DAS bar would be the minimum for track events IMHO.
The added benefit is, it stiffens the chassis for improved handling.

Jim B
Old 02-24-2002, 10:49 PM
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...and if the scoop is coming from Jim B. in Orange Park Acres..it is gospel in my book . Jim brings up a good point. POC will not accept an aluminium bar...I don't think it would be acceptable for PCA Club Racing...if you really wamt to know, I'll look it up.

993TTs, especially Jim B's car are approaching 160 down the front straight at Willow Springs. I know this first hand as it cost me a vey nice lunch!!! Damn that is fast!!! Jim Brady is <img src="graemlins/r.gif" border="0" alt="[king]" /> of speed!!!!
Old 02-24-2002, 11:15 PM
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Now, I remember why I spend so much time here! What a great board. Thanks to everyone for the wealth of useful information.

I spent some time on the phone with Greg tonight, and we discussed this common scenario among new track junkies (now it's my turn, I suppose ). New drivers start with simple solutions such as a harness bar or truss, only to eventually upgrade to more serious options such as a bolt-in roll bar. After a bit more track time, more light bulbs go off and drivers start looking for full welded cages, fuel cells, etc. I'm starting to understand the term "cubic dollars".

Tonight, I ordered a pair of GT3 seats (always wanted them!), and I plan to check into the DAS roll bar. I've had a problem with adequate headroom while wearing a helmet, so hopefully, the GT3 seats will help in this regard as well. Unfortunately, I'll probably be waiting on all of the above for several months, given the typical production delays.

One last question: With the DAS roll bar, I've read that some holes do need to be drilled (to mount the harnesses?), even though the DAS site suggests it's strictly bolt-in. What's the true story? Also, pics of an installation in a 993 coupe would receive a heartfelt "mucho gracias"!

Buenos noches!
Old 02-25-2002, 12:25 AM
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Robert Henriksen
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[quote]Originally posted by Anir:
<strong>One last question: With the DAS roll bar, I've read that some holes do need to be drilled (to mount the harnesses?), even though the DAS site suggests it's strictly bolt-in. What's the true story? Also, pics of an installation in a 993 coupe would receive a heartfelt "mucho gracias"!</strong><hr></blockquote>

I could probably send you some pictures tomorrow; for now, I can promise you that a) I did the installation myself, *and* didn't have the usual factory instructions since I bought mine secondhand... b) I didn't drill my baby, hell no!!!

Wait, um, that didn't sound right... <img src="graemlins/jumper.gif" border="0" alt="[jumper]" />
Old 02-25-2002, 03:02 AM
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Rob Wolford
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Anir,

Wise decision.

No drilling.

I'll email you pics in a day or two.


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