i run a 14 on my LX since im not running a conversion its a threaded body QA1. Coil-Over Conversions Explained by Chris Alston To dispel some popular myths and help you understand which coil-over conversion is best for your project, it is necessary to explain in great detail about shocks and springs. The wheel rate for the rear of a Mustang with a solid axle and stock 4-link is approximately 50% of the stock location spring's rate. Not too sure about track to autocross differences with spring rates but the higher spring rate in the front with the most about of camber (Vorshlag CC plate along with opening the strut shaft hole more) has been great. doesn’t seem to add any aerodynamic benefit. For the purpose of this discussion it is assumed that your vehicle 2005-14 Mustang GT BMR Handling Lowering Springs, 1.5" Drop, Set of 4 - There is nothing like the aggressive look of a car with the right stance! The LOWEST rear spring they sell is 175#. The use of rear coil-overs depends highly on front spring rates. Over time, stock springs sag, get rusty, and simply wear out. The angle that the coilover assembly is installed at has a large effect on what the spring rate will need to be. 2015 Mustang GT base/PP Manual Suspension: RideTech TQ 375/650, ... Discussing spring rates without knowing wheel rate is nearly a waste. Non-IRS equipped Mustangs (basically everything prior to 2015) can have issues in turns due to the solid rear axle (SRA) design that gets ‘twitchy’ when it hits a bump or uneven pavement. does anybody know if they gv replica lip would make it change classes? If we apply 500 lbs of weight to each spring, the 150 will compress 3.33 inches, and the 400 will compress 1.25 inches. What if I have a Mustang II front end under my…. The specific spring rates within these kits are designed for street driven Mustangs and occasional track day appearances! Thanx . Full Forum Listing. Conventional chassis tuning theory says you can increase the spring rate by the amount the swaybar contributed, remove the swaybar, ... I’m planning on buying a used car in the next week or two and I’d like to eventually get into autocross. 2. I am planning on starting to autocross next year with my new to me 92 na miata. Choosing a spring rate for a QA1 stock mount coil-over system (also called Pro Coils or direct-fit coil-overs) is easy! Spring rate is important to reduce body roll. 66 Mustang: I thought I recall seeing a list of recommended spring rates for different situations (street, autocross etc) on the SorT website (for Shauns front Coil-Over system, but no luck finding it) Was I dreaming or was this information buried in one of the suspension threads? Overhaul the ride quality and ride height of your Mustang with these complete coilover kits. On the Vette rear coil over kit you can change them in about twenty minutes or so. Autocross related. ... You also gain 20 lb/in of spring rate over the non-GT500 handling springs. The S-27m spring has a rate of 640 pounds per inch. 79-04 Mustang Pro Series Front Coil Over Kit with Springs Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name All Ford Techboard Galaxie Pages The Garage Falcon Pages Mustang Pages (1965-1973) Recommended Communities. Reply. 1967-70 Front Shocks, Springs, Sway Bars 1967-1970 Mustang front springs for autocross and performance street sold as a pair part# S-27m Global West Suspension supplies USA made front springs for 1967, 1968, 1969, and 1970 Mustangs. Find coilovers, lowering springs, and other performance suspension parts and accessories at Springrates. When in doubt, choose a lower spring rate. From there, the Mustang has two spring setups: one for the drag race and one for autocross. One can sort of guess but knowing the actual ratio is required for the math. QA1 also offers a bolt-in front coil-over for your street rod applications. Any gen Mustang can feel somewhat floaty and high up due to the stock spring ratios, which are great for daily driving and absorbing bumps and potholes, but awful for handling and curbside appeal. What is autocross? The coil over system again gives you a way to increase the spring rate with minimal effort. Luckily, there are proven spring rates for just about any Mustang setup. ive never noticed it rubbing with this. I'm assuming MM gave you input on the spring rates for your specific setup? This cataloged coil-over kit for your vehicle has already gone through the R&D process and the spring length has been determined, so choosing a spring rate is simply a matter of matching the vehicle weight to our available spring rate charts below. The Mustang Forum for Track Enthusiasts. We understand the suspension needs of your Mustang better than any other company. I thought about it, but really don't do track days or autocross any more, so remained stock. For those that have custom spring rates, ... or the 2008-2010 Ford Mustang GT. As with Mustang front spring rates, rear spring rates must be converted into wheel rates. spring that is installed at 0° straight up and down (90° from the axle centerline) will support 1450 lbs. k is spring rate x is the deflection from neutral state (e.g., amount of compression) Let's compare 2 springs, a 150lb/inch spring that's 14 inches long and a 400lb/inch spring that's 12 inches long. This from the MVMS document for the 2005 S197 that has lots of information. a longer softer spring also allows the spring to store more energy to help carry the front end up. We offer leading brands at competitive prices! Take the average fwd setup, springs & swaybar. The firm spring rate would be used for an autocross/road racing application or for a streetcar that say, has a 300 lbs of stereo in the trunk. Did they recommend that 1-3/8 front sway bar? The Mustang GT Drag Springs (PN 555-8231) lower the front of the car 1.25-inches and lower the rear .5-inch. Spring rate chart. These springs are most ideal for those who are looking for an all-around solution to lowering their Mustang and increasing handling capability, all without sacrificing ride quality. I think people tend to overlook what a stock/stockish ride height Mustang is capable of, and see "more" only as being "more than not very good". (T) Spring Travel Used At Ride Height Installed Spring Length At Ride Height 2.80 1.12 1.40 1.68 7 5.88 5.60 5.32 3.50 1.40 1.75 2.10 7 5.60 5.25 4.90 4.25 1.70 2.13 2.55 9 7.30 6.88 6.45 5.15 2.06 2.58 3.09 12 9.94 9.43 8.91 MM typically recommends a rear coil over spring rate of 150# less than the front spring rate for street driving. thanks. Advertisement. True progressive-rate springs do gradually increase their rate as they are compressed. 3 VariShock Coil-Over Shocks Coil-Over Shock Travel Street Handling Drag Spring Free Length Street Handling Drag 60/40 50/50 40/60 Max. 14" springs are also known to bind up on coil over conversions. Jump to Latest Follow ... Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! It is easier to achieve handling and performance with a lower spring rate and a "stiff" stabilizer bar or shock. Center Min. Spring Rate = Static Load / Shock Ride Height. Spring Rate. I have no idea about the rates of mustangs and the best rates for autocross or drag or track so plz if you have some info i would like to know . Explore Our Forums. ... or the 2008-2010 Ford Mustang GT. ... Road Course, Track, Autocross, HPDE. We offer leading brands at competitive prices! That means the lowest front spring rate is 325# that you can run. RideTech develops our shock calibrations and spring rates through thousands of cross-country test miles, on our exclusive test track and at competition events from coast to coast. You should always find the closest spring rate available for your application. Most of it should apply to the 2006. The greater the angle of the spring, the stiffer it will need to be to support the weight of the car. Featuring brand new shocks, struts, caster camber plates, and springs these kits are perfect for improving handling. BMR Suspension believes the right springs go beyond looks—your S197 needs to perform, too! https: ... and obsolete in the Mustang pecking order. Sadly I am stilll on 18x10s but for small local events I am still up in the top. Same goes for Mustang owners with our Vector Series Coil Over kit. Progressive rate springs provide a variable spring rate from one side of the spring to another. A coilover with a 10” 225 lb. Stock spring rates for the 2005 coupe are about 135 lb/in front and 142 or so out back. Save Share. Swapping spring rates makes the biggest change, but you can adjust the ride height to shift the weight to get the car to feel neutral. Simply choose the suggested spring rate for your vehicle. 12inch spring allows us to get the coupe lower to the ground. For example, a 200 lb/in stock location spring has a wheel rate of 100 lb/in. Find coilovers, lowering springs, and other performance suspension parts and accessories at Springrates. i don’t think it would but i’m not sure. They’re backed by our exclusive 1,000,001 mile warranty. These kits are designed for street driving ( PN 555-8231 ) lower the front end up rate for your setup. Starting to autocross next year with my new to me 92 na.... A waste improving handling also gain 20 lb/in of spring rate over the non-GT500 handling.... 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