Corner weighting invloves adjusting preload so the LF/RR diagonal pair of wheels carries exactly half the total weight of the car as the opposite RF/LR pair. Be open minded, be willing to experiment, look at your data, test. 6.) Record tire temps with a probe type pyrometer (no lasers! The adjustment was designed to primarily adjust the low speed rebound damping, which is mostly affected by body … The former 4-wheel double wishbone turned into a front wishbone / rear multilink setup. 7 to 22.9" tall tire which when loaded, will have a static loaded radius of about 11.25". Failures are rare but we have seen OTR, UBJ and LBJ failures on Exocets that are directly attributable to the excessive articulation created when shock spacers are not used. Installing a delrin/Acetal in forward and aft postions of the front control arms will cause binding. An example of Spec Miata safety roll cage by Racefab Inc. Spec Miatas used a specific Bilstein shock with an adjustable coil-over suspension with Eibach springs and adjustable front and rear sway bars. If you hold the measuring tape next to the hub you induces an error because the tape will not be 90° the ground plane. Our setup optimized for a given track, weather, hardware, will not be ideal for you. “The Penske Racing Shocks package is a major step forward for Spec Miata, upgrading the cars from an underdamped street shock to an uncompromised race piece intended solely for the track,” Pobst said after testing. The settings you finally settle on are your setup, which is different than our setup. Among the Miata/MX-5 suspension kits on the market there are only a few for streets. The Street Alignment may cause a 100% stock Miata to oversteer, or be too "loose" so it is recommended to use the front sway bars described here. The only front lower bushing that will work is a custom  Delrin or acetal nylon offset that is pinned in place by a bolt or stud. For more info, google "corner weighting". The Racing Beat 1.125 bar is too much for normal street tires (>240 treadwear). The field in Spec Miata is reliably the largest on any given amateur weekend, and typically is over 20 cars. Add to Wishlist; Cusco Street Zero-A Coilovers. Lower the front to increase front grip and turn in response, again, until it begins to bottom the suspension excessively. You may still end up with the chassis jack points level, just understand that Miata alignment specs do not directly always translate to the Exocet chassis. Add to Cart. To reach target camber and ride height will usually require adding. Disclaimers: Performing any modifications to your car based on advice from this FAQ page is dangerous, might hurt you and and kill a kitten somewhere. Too low and the suspension will bottom so that's your limiter. A new championship-capable car is under $40k from competent builders. Selecting Miata suspension parts starts with knowing what you want to do with your Miata. Two different drivers under the exact same conditions can generate very different tire temps and require different set ups. That's a little high for street use, even with magic dampers. The last bitWe have attempted to make it clear that no single alignment specification can be ideal for everyone. For track, autocross or canyon driving, we prefer a 1.125" front. Miatas over 180whp or so can run +1/8" total toe in at the rear to attenuate corner exit power oversteer. CasterMore caster can help mid to low speed turn in, makes steering heavier, may increase wheelspin in very low speed turns with a Torsen or open type differential. For track cars, we like a 14mm rear bar. Easy adjustments via the EDFC system are a fun novelty. If running manual or depowered rack, lower caster can reduce steering effort. Ride heightThere are several ways to measure ride height. Street Performance Coil Overs. Favorite performance alignment shop in SoCal: West End Alignment  Darren Nishimura, 18008 S. Vermont Ave Gardena, CA 90248 310.808.9233, Darren and his crew can also set up coilovers, cornerweight and generally get everything dialedFront End Service Kit, All content on this page copyright Supermiata LLC 2020, Disclaimers: Performing any modifications to your car based on advice from this FAQ page is dangerous, might hurt you and and kill a kitten somewhere. At full droop and full bump, and larger diameter aftermarket shock body can sometimes hit the control arm. While primarily used for street or show cars, many Air Suspension Kits available on the market today are strong enough to withstand light track use as well. It's often helpful to run a search to see if your question has been asked and answered … The NB front subframe has a slightly higher roll center and more camber gain. That means, same tires, same driver, same conditions, change one thing at a time. There you will find the infamous “Miq spec” alignment by Miq Millman. Fine tuning alignment is fine tuning for your car setup, roads and driving habits. The actual fender shape and location can vary on a  10-20 year old car so this method is less precise. Lower values reduce steering effort. The actual fender shape and location can vary on a  10-20 year old car so this method is less precise. This is the end result - a Miata suspension built from the ground up for us. For autocrosser, this compromise is usually worth it as it will greatly reduce wheel spin and reduce oversteer during low speed transitions. Sway bars (anti-roll bars)Disconnecting the rear sway bar on a lowered Miata allows the inside wheel in a turn to droop further. Spec Miata runs some pretty stiff front springs - 700 lb. FM (24mm) or Racing Beat 1" (25.4mm) solid bars will work. I set the cross to 50.1 % which is again normal for me there. For street only use, we prefer a smaller diameter front bar and OEM rear. The real answer: A Spec Miata can cost anywhere between $5,000 and $65,000 (and probably higher if you tried). $3,599.99. IOW, read, assume, implement at your own risk (don''t sue us if you mess your car up and crash). I'm hoping that the FCM package offers a more streetable compromise. If there was negative camber to the wheel, then as the car leans into the turn, it will fall onto the flat part of the tread instead of the tire's sidewall. Class Description “The NASA Spec Miata Challenge is an affordable racing series, primarily focused on road racing, and shall function as an advertising and marketing tool for the series sponsors, the independent sponsors of each team, as well as the official sanctioning body of the series.The purpose of this series is to provide an avenue to promote sponsor brand awareness on a national scale. Since the inside front with swaybar still attached will not droop, rake changes. It is sometimes not possible to get enough negative camber, particularly on the NA chassis. Rear total toe: +1/16 for <200whp. Higher caster values will increase stering effort. Assuming the engine, bearings, wiring, exhaust, and brakes are alright, the capable Spec Miata needs to be made sturdy and resilient for the inevitable wheel banging that happens on the track. For track use however, this will usually result in terminal understeer on corner entry that will have you pulling your hair out trying to fix. Mazda Spec Miata Penske Racing Shocks Upgrade on Way to NASA and SCCA. In both short and long shock setups, your useful range begins at those minimums and goes up from there. A suspension control arm, or A-arm, links the suspension between the chassis and the hub that carries the wheel. Not to mention, if you can learn to drive on stock suspension w. We will then fine tune mid corner- steady state balance by making small adjustments to rear ride height. We are faster on ome tracks with as much as -4.5° front camber, sometimes only on one side. Ground clearance for street driven cars is really up to you. We are merely providing you with a starting point. Balance that against the steering effort you prefer. If you are always using the same tire diameter, I recommend using pinch weld height as it's easier to get more precise and repeatable measurements. For these reason. Yes, Rusty Wallace’s 2005 Penske NASCAR Dodge Charger was the “gold watch” retirement present given to him by “The (…), All contents copyright © 2021, Racer Media & Marketing, Inc. All rights reserved. This means the front stays low, the rear jacks up in a turn. I have a '95 FMII equpped car with the Spec Miata Bilstein/Eibach package. In short, if you can get your autocrosser to work with the rear bar, keep it hooked up. If you have a rear bar larger than 14mm and want to keep it, don't. ~+1/8" for greater than 200whp. While the debate between those that prefer coilovers or air suspension can get pretty heated, the unmatched height adjustability of Air makes it a strong Mazda Miata suspension option in our opinion. Perhaps that's where you are, but I'm surprised it still takes that much bar, giving up more of the "independence" of your suspension. Our criteria:Street   No competition use. You shouldn't expect to be able copy the settings published on this page verbatim and have it turn out 100% perfect for every possible car, driver, course. The pyrometer is your friend, learn to use it! Flyin' Miata did a nice job here; they resisted the temptation to overspring the car, for one; the street-focused suspension is compliant but still satisfying and capable for track work. That’s quite a tall order for a car designed for almost nothing NEAR that capability. For track use, save yourself the headache and leave it on. For the same reason all pro race teams measure ride height from the frame rail, we always use pinch weld height method of measurement at our shop. Spec Miata Suspension Kit This is the MazdaSpeed Motorsports Development Spec Miata required suspension kit. 6.) Skunk2 Racing’s Pro-ST Coilovers for '90-'05 Mazda Miata NA/NB are engineered as the best single adjustable suspension system on the market at a price point you can afford!Serious club racers and discerning high performance street car owners agree th Running caster beloow about 2° can result in very vage steering with little or no self centering force. The Race Alignment assumes: * Either factory Bilsteins or high performance aftermarket dampers * At least 550# front springs* At least 1" front sway bar * EHP (<=200UTQG) or R compound tires, not hard compound street tires * You are comfortable with potentially less high speed directional stability than the Mazda factory alignment settings may provide. The fender lip on an unrolled fender can be 3/16" thick so two different people will often interpret the exact point differently. It was time for a change. This is the end result - a Miata suspension built from the ground up for us. For the Miata, that comes from Miata.Net. The roll center axis doesn't like to be too far out of sync with the roll centers. Rear total toe: +1/16 for <200whp. The effect is slight but it changes the roll axis, camber gain and a few other things. Do yourself a favor and make sure the suspension bolts, perch adjusters and other hardware you will be adjusting are free, ready to adjust but not loose. It is recommended to at least once, measure the lower, inner suspension pick up points on the subframe and compare those to the jack points on thesame corner. Exocet ride heightThe 2nd gen Exomotive US made chassis have a slightly different suspension geometry than the Miata donor.1. The actual suspension geometry is designed to require greater front than rear camber. What ride height?Ultimately, the lower your Miata is, the faster it will be in competition. We often suggest that new wheel-wheel racers consider Spec Miata. Suspension: • Recent 4 wheel alignment to factory specs (What can I say I drive it on the street) • Mazda Spec Miata suspension installed • New Racing Beat adjustable end links • New lower ball joints • New tie rod ends • New front upper control arms / ball joints • New front hub assemblies All the right ingredients are present and all components are fairly easy to get to. The suspension you run is one of the most important elements that’ll affect your Miata handling together with the look of your ride. Very different ride height left to right. There is a huge market of Spec Miata cars for sale. The NB front subframe has a slightly higher roll center and more camber gain. This and the relatively loose dimensional accuracy of the Exo chassis means the ride height measured at these jack points may not be very accurate. CamberWe are faster on ome tracks with as much as -4.5° front camber, sometimes only on one side. I'm very interested in this article. If you can't get enough front camber with you 89-05 Miata, welcome to the club! If you have a rear bar … Energy Suspension Front Control Arm Bushings 2016+ Miata MX5 - CLOSEOUT. Tein 90-98 Mazda Miata NA8C/NB8C Street Advance Z CoiloversAbout TeinTEIN, Inc. is a worldwide company with facilities in Japan, United States, CHINA and United Kingdom. Our goal was for a high performance suspension that wouldn't punish on the street. ISC Racing offers a offset front upper Delrin bushings optimized for 7" SCCA ITA wheels but they reduce bump travel with 8" or wider wheels. It works O.K. $1,299.99. Best coilovers for NA Miata: BC Racing’s BR kit will be a huge improvement over the weathered and worn OEM suspension on a classic Miata. Make sure your car is basically healthy before trying to tune for more grip. Running caster beloow about 2° can result in very vage steering with little or no self centering force.High camber with ELBJ (extended lower ball joints) wil make the steering very heavy. Minimum rear ride height with Xida Race or most short body (two piece) coilver is 4.25". The interior retains a factory dash assembly but has otherwise been … Lawyers ultimately dictate the OEM alignment, not the clever engineeers that designed the suspension. For autocrosser, this compromise is usually worth it as it will greatly reduce wheel spin and reduce oversteer during low speed transitions. FM (24mm) or Racing Beat 1" (25.4mm) solid bars will work. Advertisement . Price: $80.00. As the Miata transfers its weight to the outside tire, the suspension travels up, and the car leans over on the edge of the tire. ° difference in camber left to right and about 8% wedge. You must locate the exact center of the hub and this is difficult to do accurately. 3. Add to Wishlist; Integral Kobe Master Spec Coilover Kit Type-R . We don't know how the Penskes are valved but it's unlikely that street comfort was a consideration. Independent rear suspension with coil-over shocks for planted cornering. Grind the gussets a little to clear your shocks if need be. Take measurement from forward most and rearmost straight area of lower unit body pinch weld at it's lowermost edge. While that is an extreme, the point is that the more you want to push the performance of your car, the more time you will spend aligning it and that is is changing constantly for conditons. If you’re looking to replace a worn suspension, improve your roadster’s handling, or to just get low, coilovers are the way to go for … At the national level of road race or time trial, alignments are often asymmetrical. Autocrossers forced to run wheels much narrower than optimum for the tire width will usually benefit from 1/8 to as much as 1/4" front toe out (CAUTION, this front toe out rapidly wears your tires on the street). Add to Wishlist; Cusco Street Zero Suspension System. is not difficult. Planet Miata 1205 Main St Swoyersville PA 18704 United States of America 866-296-1100 sales@planet-miata.com 866-296-1100 In a conversation it is hard to cover the full breadth of what makes SM such a good class, so we thought we'd write down our top … Height adjustable to 1.0 - 2.5” on average; Fine tune lowering to what you want; H&R Street Performance Coil Overs are the perfect suspension solution for discerning drivers—from daily drivers to serious tuners—who can appreciate … Manufacturer: Tein Tein Street Advance Z Coilover. Complete with (4) Bilstein shocks, (4) Eibach Springs, (4) Coil Over Kits, (2) Eibach Sway Bars and FatCat style bumps stop kit • 1990-1993 1.6L DOHC K-SPEC-M5-SUSP • 1994-1997 1.8L DOHC K-SPEC-M5-SUS8 Most DOT R compound race tires will develop their peak steady state lateral (cornering) grip at camber, toe and pressure settings that won't necessarily show even tread temps or wear. Only the forward bushing should be used in conjunction with a normal (not offset) urethane or rubber bushing. This look under the skin of a 2020 Mazda MX-5 shows why the ND is the best Miata in that arena, too. The only front lower bushing that will work is a custom  Delrin or acetal nylon offset that is pinned in place by a bolt or stud. Mazda tolerances are pretty wide, so getting within spec. If running manual or depowered rack, lower caster can reduce steering effort. $1,599.99. The Exocet chassis has it's upper shock mount locations raised roughly 45mm from the position in the Miata. Meaning your car might oversteer in left turns but be neutral or even understeer in rights, for example. There are several ways to measure ride height. In general, you can lower the rake to increase rear grip and improve transitional stability up to the point that the rear suspension begins to bottom. This is the end result - a Miata suspension built from the ground up for us.
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