Poll: Chassis Setups
Wanted to start a poll of everyone tracking their Miatas regarding their chassis setups. Might help some of us further tune our chassis' for optimal performance.
Here is a format I think is beneficial. (This is not data for my car - it is just an example for the format) Please note what track your setup is primarily configured for. Feel free to add any other information you feel is necessary. Year: 1991 Weight (w/Driver and 1/2 tank): 2355lbs (48%/52%) Power: 287rwhp Springs: 500lbs (F), 300lbs (R) Dampers: Koni re-valved, FM Bumpstops Front Bar: Tubular 1.125" Racing Beat Rear Bar: 5/8" adjustable End Links: OEM Diff: GURU lsd Bushings: Energy Polyurethane Wheels: Kosei K1 15"x7" Tires: Victoracer V700 205/50/15 Camber: -1.5 (F), -1.0 (R) Toe: 1/8" (F), 1/8" (R) Front Caster: 5.2 degrees Ride Heights: 11.5" (F), 12.0" (R) Stiffening: HDDD, Door Bars, Strut bar, Hardtop Front Aero: GV lip with 4" Splitter Rear Aero: GTC-200 @ 10 degrees Brakes: Corrado BBK (F), Miata R (R) - Hawk Blue Track: Mid-Ohio Lap: 1:38 @ Vavg of 88.2mph Notes: 5-speed, 3.9, GT3071R Please add your setup below! |
Year: 1991
Weight (w/Driver and full tank): 2519lb (eek!) Power: 254rwhp Springs: 550lbs (F), 375lbs (R) Dampers: Tein flex twin tube Front Bar: Tubular 1.125" Racing Beat Rear Bar: stock End Links: heim Diff: torsen 1 Bushings: 20-year old stockers Wheels: 15x9 6UL Tires: 225/45/15 ntw-01 Camber: -2.5 (F), -2.75 (R) Toe: 0" (F), 0" (R) Front Caster: 3.5 degrees Ride Heights: 4.25", 4.5" at the pinch welds Stiffening: roll bar and door bars Front Aero: none Rear Aero: Gnone Brakes: Trackspeed fronts with RB rotors, 1.8 rear, Hawk DTC-60, FM valve Track: MSR-C Lap: 1:24.CW Notes: I'm "dating" your sister. |
Year: 1994
Weight (w/Driver and full tank): 2700lb (estimated) Power: 300rwhp - LS1 conversion Springs: 700lbs (F), 450lbs (R) Dampers: Koni Race f&r Front Bar: Tubular 1.125" Racing Beat Rear Bar: stock End Links: 949Racing front, stock rear Diff: TrueTrac (Ford 8.8) Bushings: Fresh Energy Suspension poly bushings Wheels: 15x8 6UL Tires: 225/45/15 Nitto NT-01 Camber: -2.0 (F), -2.3 (R) IIRC Toe: 0" (F), 0" (R) Front Caster: ~3.5 degrees Ride Heights: 12" front, 12.25" rear Stiffening: roll bar Front Aero: DIY air dam and splitter, vented hood Rear Aero: APR GT dual-element wing with DIY end plates Brakes: Corrado front, sport rear Lap: Slow, still trying to get the car (and the driver) dialed in Notes: T56 trans, 3.53 diff ratio, engine oil cooler with thermostat. All your sisters are belong to us. |
Year: 1990
Weight (w/Driver and 1/2 tank): ~2600 lbs. (still a street car too and I’m a lardass) Power: 356rwhp Springs: 700lbs (F), 400lbs (R) Dampers: Koni sport re-valved, Custom Spherical ball tops with NB bump stops Front Bar: ISC-racing 1.25”X1/4” wall Rear Bar: ISC=racing 5/8” End Links: Spherical Diff: Torsen type II Bushings: Super Pro Polyurethane Wheels: 949 racing 15X9”, used with 15mm spacers Tires: 225/45/15 Nitto NT-01 Camber: -2.8(F), -2.5 (R) Toe: 0" (F), 0" (R) Front Caster: 4 degrees Ride Heights: 11.25" (F), 11.75" (R) Stiffening: HDHCSD, Door Bars, Strut bar, Hardtop, FM frame rails, rear underbody brace, fully seam welded, +under fender braces. Front Aero: GV lip with 3.5" Splitter Canards and wheel spats. Modified Erebuni vented hood. Rear Aero: GTC-200 @ 10 degrees, double 2.5” risers, Simpson rear bumper and trunk lip. Brakes: 11.75” willwood Dynapro Mini Cooper Front, 11.5”custom rears with stock relocated calipers. Cobalt friction XR2 pads F&R. Track: Pacific Raceways Lap: 1:34.6 Notes: currently with 6-speed, 3.9, GT3071R, 2.0L |
Year: 2002
Weight (w/Driver and 1/2 tank): 2600 Power: Stock Springs: 450lbs (F), 325lbs (R) Dampers: FCM non-adjustable Front Bar: Flyin Miata on soft Rear Bar: OEM End Links: 949 racing Diff: OEM Bushings: OEM Wheels: 6UL 15"x8" Tires: Bridgestone RE-11 205/50/15 Camber: -1.5 (F), -1.5 (R) Toe: 0" (F), 0" (R) Front Caster: 4.5 degrees Ride Heights: 12.75" (F), 13.0" (R) Stiffening: HDDD,Door Bars,Hardtop Front Aero: None Rear Aero: None Brakes: OEM Sports brakes Note: I need more crap |
949 Racing Rental & OGK
Rental
Year: 99 Weight empty: 2140 Power: 160whp n/a Springs: Hyperco 2.25" 700/400 with 150# tenders Dampers: Xida double adjustable, remote reservoir Front Bar: Tubular 1.125" Racing Beat Rear Bar: 14mm Mazdaspeed Bushings: Energy Suspension & diff mounts End Links: 949 Racing Diff: Torsen Wheels: 15x9 6UL Tires: 225/45 Nitto NT01 Camber: -2.9F/2.6R, zero toe all around Ride Heights: 4.1"F/4.4"R (pinch weld) HDHCHTDD No aero Brakes: Carbotech XP10/XP8, plain OEM replacement rotors, brake ducts 6x4.3 Car is consistently 2-3 sec under Spec Miata lap records at every track in California OGK Year: 91 Weight empty: 1950 Power: 300whp Kraftwerks Rotrex, Whammy 2.0 engine Springs: Hyperco 2.25" 800/500 with 150# tenders Dampers: Xida double adjustable, remote reservoir Tubular control arms Tubular front subframe with NB geometry 949 Racing drop spindles Billet aluminum front hubs Billet steel custom rear hubs Front Bar: Tubular 1.125" Racing Beat Rear Bar: 14mm Mazdaspeed Bushings: Energy Suspension & diff mounts End Links: 949 Racing Diff: OS Giken Wheels: 15x9 6UL Tires: 225/45 Nitto NT01 Camber: -2.9F/2.6R, zero toe all around Ride Heights: 4.1"F/4.4"R (pinch weld) Miatacage full cage with curved dash bar Full under tray Custom diffuser Dive planes GTC300 rear wing Autokonexion fast back Autokonexion custom nose Auokonexion Kevlar/FRP 30mm fenders Brakes: 11.75", Wilwood DP6 front, DL4 rear Carbotech XP12, cockpit adjustable prop valve, manual brake (no booster), Wilwood master cylinder, brake ducts 6x3.9 |
Surprising how I ended up at the very similar suspension settings to Emillio and I arrived at those settings pretty much on my own by trial and error with mostly seat of the pants testing.
I also got a chance to drive the 949 Rental back to back in the same session as I drove my car in at Laguna to compare. Here is my observation. 1. The Xida are in a whole nother league as far as damping performance than my old and tired Koni. My Koni gave the car a dead feel with much slower response. The Xida were more lively and the car was more responsive and it really felt more like the tires were connected by an inseparable force to the road over slight ripples, FIA curbing, and unweighted situations. 2. The other thing I noticed is the rental would rotate on throttle much more easily than mine. Very controllable, im not a drifter but I felt like I could force this car into a nice controllable power drift. I liked the way it felt but I was not sure it was faster that way because my car with a slight bit more push I felt I was able to add a more throttle earlier coming off corners without stepping sidways and I know that is fast. I do not know what caused this difference in feel for sure but my car had more aero with a GTC200 wing and a splitter, different sway bars and different damping, could be any of those things. Bob |
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