First Look: 914-6 Alloy Rear Calipers, ...about 30 days out. |
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First Look: 914-6 Alloy Rear Calipers, ...about 30 days out. |
Eric_Shea |
Aug 14 2012, 08:16 AM
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#1
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
The time has come. We are beginning to take pre-orders on the 914-6 rear calipers.
As you know, us 914 owners have long been looking for a solution to a properly biased brake system. The fronts have been the easy part, bolt on a pair of Brembo's ...or a 3.5" 911 front suspension and you would have your choice of larger calipers with 48mm pistons up front. But, what about the rears? You need a 38mm piston to give you the correct bias. For 914 owners that meant a long and winding road of searching for the proper solution which usually boiled down to two things; uber-rare (and uber-expensive) original 914-6 calipers or 911 rear calipers and a confusing handbrake assembly or, worse yet, 911 rear calipers and no handbrake solution. Well, you're looking at the true bolt on solution. Aluminum castings of the famous 914-6 rear calipers. Final weigh-in has yet to be established but, we think we'll be under 3lbs each with the aluminum pistons. These simply bolt on and use stock handbrake cables and parts. Larger pistons and larger pads make this the prefect rear caliper solution for Brembo bolt-ons and S-Caliper or A-Caliper upgrades. What you are looking at is a raw alloy assembled prototype prior to anodizing. (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-1110-1344953789.1.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-1110-1344953790.2.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-a.xx.fbcdn.net-1110-1344953790.3.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/sphotos-b.xx.fbcdn.net-1110-1344953791.4.jpg) |
Eric_Shea |
Aug 17 2012, 09:55 AM
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#2
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
No personal attacks Matt... I was wondering the same. Just a general observation of all the Internet racer chatter about flex in calipers that have put others at the top of the leaderboards.
These are exact replicas of a proven design in a stronger and lighter material. Try bending a beer can... you win. I'm not going to get into it further. My track experience? Schooled at Skip Barber and Bob Bondurant. With Skip, Terry Earwood was my instructor. With Bondurant, Bob himself at Blackhawk Farms. 18 years PCA on Mid-America, Las Vegas Motorspeedway, Atlanta Motorspeedway, Miller Motorsports Park. I haven't raced now for about 5 years. Probably not as much as you but, enough not to be talking out of my ass and, enough time on S-Caliper not to complain about them. No engineering background. I sourced others for that. I just build thousands of brake calipers and just trying to make a quality product for the industry. (IMG:style_emoticons/default/beerchug.gif) |
Matt Romanowski |
Aug 17 2012, 10:54 AM
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#3
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Senior Member Group: Members Posts: 878 Joined: 4-January 04 From: Manchester, NH Member No.: 1,507 |
No personal attacks Matt... I was wondering the same. Just a general observation of all the Internet racer chatter about flex in calipers that have put others at the top of the leaderboards. These are exact replicas of a proven design in a stronger and lighter material. Try bending a beer can... you win. I'm not going to get into it further. My track experience? Schooled at Skip Barber and Bob Bondurant. With Skip, Terry Earwood was my instructor. With Bondurant, Bob himself at Blackhawk Farms. 18 years PCA on Mid-America, Las Vegas Motorspeedway, Atlanta Motorspeedway, Miller Motorsports Park. I haven't raced now for about 5 years. Probably not as much as you but, enough not to be talking out of my ass and, enough time on S-Caliper not to complain about them. No engineering background. I sourced others for that. I just build thousands of brake calipers and just trying to make a quality product for the industry. (IMG:style_emoticons/default/beerchug.gif) I've done Skippy School and probably 40 days at Watkins Glen, 100+ at NHMS, 30 or more at Lime Rock, 15 at Pocono, and a couple at Summit Point, Road America, and Sebring over the last 14 years. I've helped other folks with everything from a stock 914 to a GT2 911 (running 180 mph at Road Atlanta), a couple different Formula Fords, a couple of Formula Continentals, and a bunch of other stuff inbetween. I've set up a number of schools using the most senior Skip Barber instructor and the person that drove the data car. I can tell you lots of different things about what brakes will do on a 914 including stock calipers, Carerra calipers, Boxster calipers, and Wilwood Superlights (the best so far). Flex in the calipers can change a lot of things. Just think, when you start to go fast enough, you flex the spindle and get pad knock back from that. Things like caliper flex, bias bar hysterisis, and compressibility of the brake fluid are real problems when you push a car hard. The alloy that you choose for the calipers makes a huge difference. The strength difference from something like 1100 to 7075 is almost double. I've purchased trailer loads of aluminum, some coming directly from Alcoa for special applications. The devil is in the details and all aluminum is not created equal (even when it's supposed to be). I do hope you calipers work. It's great that you are restoring old calipers and bringing new things to the market, I just want them to be well engineered and as good as the originals. Edit: Here is a good chart to show the difference in aluminum alloy strengths. Notice the difference in strengths - 7075 is basically twice as strong as 6061 (the most common machinable aluminum) http://www.aircraftspruce.com/catalog/pdf/aluminumalloy.pdf |
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