MRMPerformance's 1994 V8 Miata
www.mccullyracingmotors.com
Wecome to our build page for our 4th Ford V8 conversion! This time we stuffed a 331 in an already pretty nasty 1994 Laguna. Follow along as we build our highest-horsepower Miata yet.
Table of Contents:
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Page One- Current Specs.
Page 2 through Page 19 -The Initial Build
Page 20 - 2010 Track/Club Events and Upgrades
Page 21 - Sping 2011 Upgrades
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Current Specs:
Chassis:
Make: Mazda
Model: Miata MX-5
Year: 1994
Package: "B"- ABS, Power Windows, AC, Leather Wheel, Laguna Paint
Milage: 170K
Conversion Kit: Monster Miata
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Engine/Drive line:
Block: Ford 302 "YYY" from a 1989 Lincoln MKVII
Rotating Assembly: Scat forged steel 331 ci stoker crank with Forged rods and "dome" pistons. 28 oz imbalance.
Compression: 10.75:1
Cam: Ford Racing E303 Degreed to 2 degrees retarded.
Heads: Ford iron GT-40 from a 1996 Ford Explorer. Stock rocker arms.
Intake: GT-40 from a 1996 Ford Explorer. Lower internally ported and upper externally polished
Throttle Body: 65mm from a 1996 Ford Explorer - linkage modifed to work in Mustng location.
Mass Air Tube: 72mm from a 1996 Ford Explorer - "flange" and internal vane removed to work with a cone filter.
Injectors: Explorer 19 pounders
Fuel Rails: BBK Billet with -6AN connections and lines. Stock Mustang FPR
Starter: PM type from a 1996 Mustang V6
Headers: Monster Miata shorty headers. Thermal coated and wrapped.
Engine management: Stock 1991 Mustang a9l ECU through a McCully Racing Motors modified engine harness
Plugs: Motorcraft copper core
Wires: OEM-replacement Duralast specials
Coil: OEM-replacement Duralast
Alternator: G3 type from a 1995 Mustang V6
Flywheel: Billet steel 28oz imbalance from LateModelRestoration
Clutch: Centerforce Stage Two
Transmission: T-5 from a 1991 Ford Mustang GT
Bellhousing: OEM 1991 Mustang GT retrofitted with a Miata slave cylinder
Driveshaft: McCully Racing Motors Aluminum driveshaft
Differential: Ford 7.5 with 3.27 gears and limited slip from a 1996 Thunderbird
Half Shafts: 1996 Thunderbird CV joints and Monster Miata axles
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Suspention/Brakes/Wheels:
Shocks: Koni Yellow
Springs: Eibach 2.5 race coils with adjustable hieght perches from Ground Control. Front 500 pound, Rear 275 pound
Sway Bars: Front - Racing Beat hollow bar with reinforced mounts and stiffening blocks. Rear deleted.
Bushings: Urithane
Alignment Settings Front: camber: -1.5/caster: 5.0/Toe: -0.05
Alignment Settings Rear: camber: -2/Toe: 0.08
Front Brakes: 1991 VW Corrado Rotors with Wilwood Dynapro 4-piston calipers and SS lines
Rear Brakes: stock 1994 Miata
Wheel studs: ARP extended length
Wheel Lugs: 949 Racing Aluminum
Street Wheels/Tires: 15x8 et-36 Gen I 6UL wheels from 949Racing with 5mm spacers (to clear Wilwood Calipers). 225/45-15 Hankook RS-3's
Track Wheels/Tires: 15x8 et-20 TR Motorsports C1 (black). Shaved 225/45-15 Toyo RA1 "scrubbs"
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Body/Aero:
Hood vents: GenRight Off Road
Hood Latches: AeroCatch
Front Lip: Garage Vary
Spoiler: Wings West
Hardtop: Mazda
Mud Guards: Mazda
Radiator Cowl: McCully Racing Motors
Front Turn Signals: eBay smoked
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Performance:
Latest dyno results: 278 rwhp/311 torque
