mx5cartalk.com

Particularity the Single Hoop Single Diagonal Tall-Boy Model. I'm wondering which one is the tallest?

What is your need?

I am 6' 3" and thought the Tall boy would suit me better but was advised by MX5Plus that the regular rollbar gives more seat travel in comparison to the Tall boy. So I opted for the standard Single hoop torque box and am very happy with it.

I have a brown davis, if I could choose between the two i'd buy an MX5Plus one.

Snowmotion wrote:What is your need?

I am 6' 3" and thought the Tall boy would suit me better but was advised by MX5Plus that the regular rollbar gives more seat travel in comparison to the Tall boy. So I opted for the standard Single hoop torque box and am very happy with it.

interesting. Im running a Bride that doesnt go all the way back due to the top part being a bit of squeeze to get in . im also 6ft4...

Purpose really is for safety and Peace of mind.

- edit nested quotes removed Okibi -

My Advice is don't get one at all. I have tried them both and currently have a Brown Davis but even that reduces your seat movement back about 1 inch.
That makes a hell of a lot of difference to your driving position and if you can't get your seat just right its really unpleasant. I'm 5' 11" and its just Ok for me but it is definitely more comfortable with the roll bar out.
Unless you are going to race it they are a bit of a wank to drive on the seats with. Sure they look good but get into a crash where some idiot runs up your arse and your head slams into the top bar and can crack your head a beauty. It happened to me twice both at relatively slow speeds and but on the second time which was about a 20kmh cut my head open.

Saying that Ive had one for nearly 2 years for the sole reason to bolt in a booster seat securing the seat with the rear eyebolt and it does give you a sense of greater safety in a big crash or rollover.
Being 6'4" try looking at tillett racing seats.https://www.tillett.co.uk Hayden had them in his car with a MX5+ twin hoop and he's about your size. He loved them.

Richard.

have you heard of AGI?

tescoking wrote:have you heard of AGI?

Yeah.. I check out the thread on the group buy they look pretty decent.

bear2230 wrote:- edit nested quotes removed Okibi -

My Advice is don't get one at all. I have tried them both and currently have a Brown Davis but even that reduces your seat movement back about 1 inch.
That makes a hell of a lot of difference to your driving position and if you can't get your seat just right its really unpleasant. I'm 5' 11" and its just Ok for me but it is definitely more comfortable with the roll bar out.
Unless you are going to race it they are a bit of a wank to drive on the seats with. Sure they look good but get into a crash where some idiot runs up your arse and your head slams into the top bar and can crack your head a beauty. It happened to me twice both at relatively slow speeds and but on the second time which was about a 20kmh cut my head open.

Saying that Ive had one for nearly 2 years for the sole reason to bolt in a booster seat securing the seat with the rear eyebolt and it does give you a sense of greater safety in a big crash or rollover.
Being 6'4" try looking at tillett racing seats.https://www.tillett.co.uk Hayden had them in his car with a MX5+ twin hoop and he's about your size. He loved them.

Richard.

G'day Richard

Thanx for the long response. I don't really drive my Mazda on a daily basis and when I do it's usually on Robertson pie runs.

The reason for me wanting a roll bar isn't purely for looks as I really want to track it more and also I love skid pans . And being that there so short they have the tendency to flip when being aggressive ( ae86 and aw11 experience haha)

The seat doesn't go all the way back at any rate and I don't mind the snugness . Though will invest in a good 320mm- 330mm wheel.

Those seats you mentioned look bloody awesome which one did your mate end up buying? Just for reference.




Sent from my iPhone using Tapatalk

iain wrote:The reason for me wanting a roll bar isn't purely for looks as I really want to track it more and also I love skid pans . And being that there so short they have the tendency to flip when being aggressive ( ae86 and aw11 experience haha)

Rollover risk is not affected by wheelbase or vehicle height ("short"). It's mainly affected by a combination of the centre of gravity and the track width. In that regard, the MX-5 is rated as one of the most stable passenger cars on the market. Rollovers can and do happen with MX-5s, but they're caused by the car tripping when loaded up and catching on something eg. when it runs off road into a ditch and digs a wheel in. The issue here is that NAs and NBs offer almost nothing in the way of rollover protection - the windscreen just squashes flat.

I am also using a Sparco Sprint V seat that goes higher than a stock NB seat and protects my head from the roll bar. (Plus the roll bar is padded)

Tillett thread viewtopic.php?f=44&t=58092&hilit=Tillett

FYI - AGI and Sparco on stock rails = someone your height not fitting.

Either way. Can't afford lost wallet today with money in it...... Fuckityfuckityfuckfuck


Sent from my iPhone using Tapatalk

AGI is taller than both MX5+ and Brown Davis, but at the expense of seat travel.

Brown Davis is slightly taller than an MX5+ (normal), but only by 15mm or so.

I haven't seen an MX5+ Tallboy in person.



Pretty much every bar is limited by the roof, the AGI sits further forward than the BD and +, which gives it more room to sit taller, but loses seat travel.
I would choose the MX5+ bar, it's a good strong design, and fits really well.

I have a BD bar, but having compared it side by side with a + bar I prefer the +.

Hi there,

I've got the Brown Davis bar and installed it myself. I found a few little things that really annoyed me because if the guys making/designing it cared they could be fixed with little effort and no real cost:

- the welded nuts for the harness mounts sit under the horizontal plate at the rear, you have to dent your parcel shelf to get the plate to sit flat.
- some of the mounting holes are positioned so that you have to drill out the captured fasteners meant to hold the wind blocker...it's not that I ever plan to put the wind blocker back in, but there's no reason the holes couldn't be moved so that you don't have to drill out the fasteners - it's just poor design.
- the product in photographic instructions doesn't match the product supplied - again not a real problem but annoying and slack.

After installing the bar a few people told me that my car is no longer street legal because the flanges on the side of the bar that sit under the seat belt mounts are 6mm thick whereas they should be at least 8mm thick - I haven't check the rules for myself.

I believe the MX-5 + bar has none of these issues and also:

- offers a degree of side impact protection because of the heavy torsion bar;
- offers slightly better vision out of your your rear view mirror because it's top bar is curved (wheres the same bar in the BD bar is straight);
- puts the harness mounts at a better height for most drivers (the range is actually not that big if you want to use a hans device).

As for safety in a crash, I think both bars are much better than nothing, but not great mostly because of their inadequate height and width. This is isn't a design flaw, just a compromise to fit under the roof.

The height is lower than you think. I've got a Cobra Monaco Pro. On the standard rails, it was a joke - my helmet was way above the bar and I couldn't have the roof with my helmet on. I'm only 173cm tall. The helmet adds a lot of height. Mounting the seat directly to the floor as low as it would go, my helmet is still above the bar.

So, suggestions? If I was building a road car I'd go the MX-5 plus bar. If I was building a track-only car I'd get a full cage (and ditch the soft top to get enough height - maybe could fit something under a fibreglass roof?) - it's cheaper than a wheelchair or for your wife and kids to get by without you.

Hopefully this helps.