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  #16  
Old 11-16-2011, 09:59 AM
karmaboy karmaboy is offline
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Re: JDM Miata for lapping/OTA - any drawbacks?

Quote:
Originally Posted by exST165 View Post
Can someone confirm this? I quite literally cannot fit under either hard or soft top of my Miata with a helmet on, and I've always wondered if an SCCA EP Miata (like this http://speedhunters.com/archive/2009...c-and-rx3.aspx ) would be allowed to run, and if so why? Is it broomstick rule + arm restraints?

Thanks!
Thomas
Different series have different rules.
As a long time miata guy...that's the rule. I don't meet it (even with my seat bolted to the floor)...so I have a bolted hardtop (spec miata style).
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  #17  
Old 11-16-2011, 11:24 AM
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Re: JDM Miata for lapping/OTA - any drawbacks?

The first priority is safety. Now if there is a reason to visit this it needs to be adressed at the meeting and go to the safety comittee.

race cars can run open because they have full cage. The hard or soft top lock the windshield to the rest of the car on the initial rollover. If you have roll bar only you will run with the top up.

I know of 1 mx5 running a full spec cage who if he desired could be allowed to run topless.

In timeattack the car is more aerodynamic with the top on, so I am not sure why you would want to run without it
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  #18  
Old 11-16-2011, 02:34 PM
exST165 exST165 is offline
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Re: JDM Miata for lapping/OTA - any drawbacks?

Thanks for your reply racecartech. I'll try to keep this on-topic: I have a Miata and I'm struggling to figure out how I can *safely* run lapping days / OTA / etc. I posted details / pictures here:

http://forum.miata.net/vb/showthread.php?t=422726

Summary: sitting on the on floor (ie: no seat what so ever) the top of my head is above the rollbar I was test-fitting but just under the hardtop. Not comfortable, but I was in. So if I could mount a seat directly to the floor under my butt (which I doubt) I would be "legal" with a hardtop, but I don't think I would be "safe" as the top of my helmet is above the rollbar and a racing bucket would hold my torso upright and keep it that way in the case of a rollover and I don't think my neck would make a great structural member.

More likely is that I I would loose some headroom mounting a seat and I just wouldn't be able to fit in the car under the hardtop.

I think it would be safer for me to get much taller custom rollbar to get a lot more headroom. But by definition that will mean it won't fit under the stock soft or hard top. Hench my question about those road-racing SCCA Miata. I realize that they are running under different rules, but I would assume that a car legal to run in national-level wheel to wheel racing would be allowed to run some regional lapping days. Not that I want to build an EP Miata to SCCA specs, just understand what they are doing to be safe.

With all that said I am tempted to just put the car up for sale next spring and buy a project car that I can actually fit in.


Thanks,
Thomas
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  #19  
Old 11-16-2011, 04:55 PM
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Cap'n Pete Cap'n Pete is offline
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Re: JDM Miata for lapping/OTA - any drawbacks?

^ ^ Again, my understanding was that IF the roll bar was HIGH ENOUGH (ie: 2" above your helmet) then you could legally run "roof down".

Sorry I don't have the time to read through the rules at this moment .
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  #20  
Old 11-16-2011, 05:36 PM
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Re: JDM Miata for lapping/OTA - any drawbacks?

The windshield structure by itself does not offer rollover protection. Tied with a roof in place it is stronger.
A rollover bar only will not facilitate roof down, a full cage however could.

A pic supplied of the mx5 racecar with no windshield and a high roll bar, this car will also have a dash bar tied into the door bars and the broomstick test is from the dash bar to the rear hoop.

This is covered in the roll cage section and is the low front hoop design.

Now the original question of this thead was the use of RHD, These cars are not a problem

The rollcage rules come straight out of the CASC-OR race rules, appendix "0"
pg's 56-63

Any further questions regarding the cage can be directed to me or Derrick. Cage questions are probably better to me.

Scott scott.murfin@canalignment.com
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  #21  
Old 11-16-2011, 11:38 PM
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Re: JDM Miata for lapping/OTA - any drawbacks?

See, told ya not to quote me!

Roll CAGE vs. BAR ... big difference, dumb, dumb! (<----me! )
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  #22  
Old 11-16-2011, 11:55 PM
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Re: JDM Miata for lapping/OTA - any drawbacks?

No problem Pete, I deal with this stuff more than you, Now if the questions are organizing or registration.....I'm out
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  #23  
Old 11-26-2011, 12:38 AM
FinanceGuy FinanceGuy is offline
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Re: JDM Miata for lapping/OTA - any drawbacks?

This should get you excited for the 2012 season:


http://www.youtube.com/watch?v=UKpnz...e_gdata_player

If you watch till the end you'll see why it's good to have a hardtop lol!
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  #24  
Old 11-26-2011, 09:39 AM
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Re: JDM Miata for lapping/OTA - any drawbacks?

Quote:
Originally Posted by racecartech View Post
Now the original question of this thead was the use of RHD, These cars are not a problem
I would suggest that for the lapping sessions or whenever we're running passing, that you use masking tape to put "RHD" on the back window or trunk lid, wherever it will be easiest to notice. We had this issue at MIR last year and it caused some confusion so maybe we should make it a rule.
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