Boss Frog "Frog Arms" anybody has?
06-17-2009, 02:39 PM
#41
#2 is partially correct. Used with a Hard Dog roll bar, behind the seat it is bolted to the roll bar, body metal and backing plate. That's more than just thin body metal. I would like to see it more like the Kirk bars where it drops down more.
On m.net Emilio at 949 mentioned introducing door bars to sell a couple years ago. Never happened. Never heard why. I've seen a number of Mustang and BMW guys at track days with bolt in door bars. So easy to take in and out they remove them when they aren't at the track. Of course they don't have our floppy chassis.
On m.net Emilio at 949 mentioned introducing door bars to sell a couple years ago. Never happened. Never heard why. I've seen a number of Mustang and BMW guys at track days with bolt in door bars. So easy to take in and out they remove them when they aren't at the track. Of course they don't have our floppy chassis.
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06-17-2009, 04:44 PM
#42
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Now that you mention it I remember reading that thread on m.net about 949 making door bars. There was also a decent debate about their merits and safety. I considered the 949 bars but ended up getting the Hard Dog bars (and roll bar) because I was ready to get something in.
The front end of the door bars bolts in right next to the frame rail and has a backing plate. It is not ideal (like welding to the frame rail) but I think it is probably a pretty rigid force transfer connection between the two. At any rate it really seems to work well.
The front end of the door bars bolts in right next to the frame rail and has a backing plate. It is not ideal (like welding to the frame rail) but I think it is probably a pretty rigid force transfer connection between the two. At any rate it really seems to work well.
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06-18-2009, 01:34 AM
#45
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I may pick up the frog arms soon. I've been thinking about them since I got the car and just haven't gotten them for some reason. Anything to make my car more livable for daily driving will be worth it right now. My cowl shake has gotten worse and worse. I may also go ahead and do some seam welding also. I hate having to pucker up over every little bump in fear my car is going to wobble in half. At least thats how it feels. I've already done the suspension once but will be doing it again. Going with FM springs and FCM mounts this time around, along with adjustable sway bar link since the stock ones are binding with the FM bars.
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06-18-2009, 03:24 PM
#52
FWIW, I've had the Boss Frog Arms for a little over a year. Cornering input is much more responsive, and the cowl shake is virtually eliminated.
For people installing them on NBs:
I told Bill at Miataroadster that the mounting points do not exactly line up and may need to be bored out. I don't know if there was a revision to fix the mounting problems on the NB, but it required be to bored out further to mount the arms where the door hinges are bolted on.
To bore them out, I used a dremel with a tungsten carbide filing bit (costs about thirteen bucks at a hardware store). After grinding it down (take a while cause the mounting points are thick and "doubled up") I blasted it with paint for rust protection.
For people installing them on NBs:
I told Bill at Miataroadster that the mounting points do not exactly line up and may need to be bored out. I don't know if there was a revision to fix the mounting problems on the NB, but it required be to bored out further to mount the arms where the door hinges are bolted on.
To bore them out, I used a dremel with a tungsten carbide filing bit (costs about thirteen bucks at a hardware store). After grinding it down (take a while cause the mounting points are thick and "doubled up") I blasted it with paint for rust protection.
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06-18-2009, 06:17 PM
#54
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Photos of the driver's side door bar from several angles are here. Passenger side is just a mirror image of the driver's side sans pedals.
Picasa Web Albums - John - Door bars
There is more room between the front door bar brace plate and the frame than I remember. In fact it is closer to the outboard edge (door sill) than the frame rail. So it looks to me like there is plenty of room for rails.
Picasa Web Albums - John - Door bars
There is more room between the front door bar brace plate and the frame than I remember. In fact it is closer to the outboard edge (door sill) than the frame rail. So it looks to me like there is plenty of room for rails.
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06-18-2009, 09:46 PM
#60
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No problem with the dead pedal for me, not nearly as bad as it looks from the pictures. It is just the angle of the shot.
My car is a daily driver so if they were a PIA to the point where it was only bearable for the track I would take them out
My car is a daily driver so if they were a PIA to the point where it was only bearable for the track I would take them out
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