Street, Auto-X, track, which roll bar?
#22
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The 4100 series seats. They come in a variety of widths depending on your size. I know the 17" wide ones fit in a Miata with no trans tunnel bashing. I am 5'10" 190lbs and have a 36" waist and they fit me perfectly. If you bolt them to the floor they also sit you very low which is awesome. Stock NB seat sit me looking just below the windshield crossbeam. In floor mounted Kirkey's with the padding and cover in them I see a few inches above the steering wheel which is a little lower then the middle of the windshield AKA perfect position.
The seat and the cover from summit come out to under $300 a seat after shipping. You can also find them used easily because every circle track racer uses them. My only gripe with them is that ingress and egress are a pain in the *** for me because of the massive amounts of support they offer. This is the only reason that I am considering a few other seat choices for my car because it is my DD.
The seat and the cover from summit come out to under $300 a seat after shipping. You can also find them used easily because every circle track racer uses them. My only gripe with them is that ingress and egress are a pain in the *** for me because of the massive amounts of support they offer. This is the only reason that I am considering a few other seat choices for my car because it is my DD.
#23
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The 4100 series seats. They come in a variety of widths depending on your size. I know the 17" wide ones fit in a Miata with no trans tunnel bashing. I am 5'10" 190lbs and have a 36" waist and they fit me perfectly. If you bolt them to the floor they also sit you very low which is awesome. Stock NB seat sit me looking just below the windshield crossbeam. In floor mounted Kirkey's with the padding and cover in them I see a few inches above the steering wheel which is a little lower then the middle of the windshield AKA perfect position.
The seat and the cover from summit come out to under $300 a seat after shipping. You can also find them used easily because every circle track racer uses them. My only gripe with them is that ingress and egress are a pain in the *** for me because of the massive amounts of support they offer. This is the only reason that I am considering a few other seat choices for my car because it is my DD.
The seat and the cover from summit come out to under $300 a seat after shipping. You can also find them used easily because every circle track racer uses them. My only gripe with them is that ingress and egress are a pain in the *** for me because of the massive amounts of support they offer. This is the only reason that I am considering a few other seat choices for my car because it is my DD.
#25
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http://www.summitracing.com/parts/kir-41700/overview/
http://www.summitracing.com/parts/kir-41711
#27
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They may hold you in better but is it necessary to do so? Sixshooter took me around Sebring with Hoosier's on the car and with harnesses on I do not see why I would need more support. You never move in the seat as it is. The extra bolster would just hit my elbows and **** me off. If I was going to go above a 4100 series I would just get a full containment seat for racing.
#28
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They may hold you in better but is it necessary to do so? Sixshooter took me around Sebring with Hoosier's on the car and with harnesses on I do not see why I would need more support. You never move in the seat as it is. The extra bolster would just hit my elbows and **** me off. If I was going to go above a 4100 series I would just get a full containment seat for racing.
#29
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Well its really nice to be able to remove the stock seat belt retractors and just run cheap adjustable lap belts (2 point harness lol) and still be very supported. So much weight reduction. I still have stock belts in my car to maintain the illusion of being a street car. But honestly, when I jump in the car to go test drive it I forget to put the seat belt on because the seat holds me in so well (and its not illegal because live free or die mother *******).
#31
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4100 series
Super true. But the OP will likely have trouble finding the big boy seats in stock in a showroom.
You should be able to run a tape measure across the floorboard and know for sure how much room there is. The seats are only as wide as that width number indicates. Then you can set two cinderblocks or something similar on the ground then sit between them and wedge your hips and *** between them nice and snug. Then get up and measure that distance between the blocks and you will know what size Kirkeys you need. It is that simple.
And if you ever want a little more padding for an 8 hour trip, you can put a little of the cheap foam rubber padding (anti-fatigue floor mat) under the factory padding to make it like a sofa.
#32
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From flying economy class transatlantic I already know, that I can squeeze my behind between two armrests that are 17" apart. I'm NOT enjoying it, but it can be done. Even for 8 hours.
I think I saw some 19" wide Kirkeys. That should definitely fit my bottom. I'll measure my floor pan and see if it will drop in.
Any thoughts on the Corbeau FX1 "wide"? That looks like my backside might slide right in.
I think I saw some 19" wide Kirkeys. That should definitely fit my bottom. I'll measure my floor pan and see if it will drop in.
Any thoughts on the Corbeau FX1 "wide"? That looks like my backside might slide right in.
#35
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The front, I also used Corbeau sliders to make life easy (I suck at fabbing stuff and don't have the tools either).
At 5'8" I'm close to the wheel and tunnel near the shifter needed a good bashing and the wing digs into the door. Even on the passenger side where I have the seat "permanently" set all the way back.
At 5'8" I'm close to the wheel and tunnel near the shifter needed a good bashing and the wing digs into the door. Even on the passenger side where I have the seat "permanently" set all the way back.
#39
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Roll bars on the street are a bit more "dangerous". I put that in quotes because I think with proper padding its not a big deal.... If you get new seats you won't have to worry about hitting your head on the bar as most seats are taller and would make it pretty much impossible. That doesn't mean you shouldn't get the padding through (SFI is good for a helmet, but you may want to get something softer to put on top of that for when you drive the car without a helmet)
As far as I can tell, it is only made by BSCI but available through a number of dealers:
Safe Drives -
Dual Durometer Rollbar Padding, SFI rollbar padding
https://www.pegasusautoracing.com/gr...roupID=ROLLPAD
and many others. Oddly, Flyin' Miata (and the other usual Miata parts dealers) don't seem to carry it.
With this, the inner layer (next to the bar) is SFI rated for maximum protection, while the outer layer is softer but still pretty firm. The idea is that SFI padding is intended for use with helmets and can be pretty hard on an unhelmeted head (or other body parts when used on door bars, etc), so the (removable) outer softer layer acts as a cushion to the inner SFI layer. For cars used on both street & track the softer outer layer can be removed when the car is on the track (and the driver is wearing a helmet) but put in place when the car is on the street.
The downsides seems to be that this padding is bulkier than usual and is somewhat more expensive. I also have not seen any covers that will fit this, but that seems a pretty minor concern.
If this works as advertised, it may go a long way to answering the problem of smacking your unhelmeted head on the roll bar (bad with SFI padding, worse without), especially if/when rearended (which just happened to me a few weeks ago, luckily at a fairly low speed).
Bill
Last edited by NW Bill; 06-21-2013 at 02:11 AM.